Pepco 10-Q2 Nov 232023 Q3 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page	9 Months Ended
Cover Page	Sep. 30, 2023 shares
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-16169
Entity Registrant Name	EXELON CORPORATION
Entity Tax Identification Number	23-2990190
Entity Incorporation, State or Country Code	PA
Entity Address, Address Line One	10 South Dearborn Street
Entity Address, Address Line Two	P.O. Box 805379
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60680-5379
City Area Code	(800)
Local Phone Number	483-3220
Title of 12(b) Security	Common stock, without par value
Trading Symbol	EXC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock Shares Outstanding	995,437,416
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001109357
Amendment Flag	false
Commonwealth Edison Co
Document Information [Line Items]
Entity File Number	001-01839
Entity Registrant Name	COMMONWEALTH EDISON COMPANY
Entity Tax Identification Number	36-0938600
Entity Incorporation, State or Country Code	IL
Entity Address, Address Line One	10 South Dearborn Street
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60603-2300
City Area Code	(312)
Local Phone Number	394-4321
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock Shares Outstanding	127,021,396
Entity Central Index Key	0000022606
PECO Energy Co
Document Information [Line Items]
Entity File Number	000-16844
Entity Registrant Name	PECO ENERGY COMPANY
Entity Tax Identification Number	23-0970240
Entity Incorporation, State or Country Code	PA
Entity Address, Address Line One	P.O. Box 8699
Entity Address, Address Line Two	2301 Market Street
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19101-8699
City Area Code	(215)
Local Phone Number	841-4000
Title of 12(b) Security	Cumulative Preferred Security, Series D
Trading Symbol	EXC/28
Security Exchange Name	NYSE
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock Shares Outstanding	170,478,507
Entity Central Index Key	0000078100
Baltimore Gas and Electric Company
Document Information [Line Items]
Entity File Number	001-01910
Entity Registrant Name	BALTIMORE GAS AND ELECTRIC COMPANY
Entity Tax Identification Number	52-0280210
Entity Incorporation, State or Country Code	MD
Entity Address, Address Line One	2 Center Plaza
Entity Address, Address Line Two	110 West Fayette Street
Entity Address, City or Town	Baltimore
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21201-3708
City Area Code	(410)
Local Phone Number	234-5000
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock Shares Outstanding	1,000
Entity Central Index Key	0000009466
Pepco Holdings LLC
Document Information [Line Items]
Entity File Number	001-31403
Entity Registrant Name	PEPCO HOLDINGS LLC
Entity Tax Identification Number	52-2297449
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	701 Ninth Street, N.W.
Entity Address, City or Town	Washington, District of Columbia
Entity Address, Postal Zip Code	20068-0001
City Area Code	(202)
Local Phone Number	872-2000
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0001135971
Potomac Electric Power Company
Document Information [Line Items]
Entity File Number	001-01072
Entity Registrant Name	POTOMAC ELECTRIC POWER COMPANY
Entity Tax Identification Number	53-0127880
Entity Address, Address Line One	701 Ninth Street, N.W.
Entity Address, City or Town	Washington, District of Columbia
Entity Address, Postal Zip Code	20068-001
City Area Code	(202)
Local Phone Number	872-2000
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock Shares Outstanding	100
Entity Central Index Key	0000079732
Delmarva Power and Light Company
Document Information [Line Items]
Entity File Number	001-01405
Entity Registrant Name	DELMARVA POWER & LIGHT COMPANY
Entity Tax Identification Number	51-0084283
Entity Address, Address Line One	500 North Wakefield Drive
Entity Address, City or Town	Newark
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19702-5440
City Area Code	(202)
Local Phone Number	872-2000
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock Shares Outstanding	1,000
Entity Central Index Key	0000027879
Atlantic City Electric Company
Document Information [Line Items]
Entity File Number	001-03559
Entity Registrant Name	ATLANTIC CITY ELECTRIC COMPANY
Entity Tax Identification Number	21-0398280
Entity Incorporation, State or Country Code	NJ
Entity Address, Address Line One	500 North Wakefield Drive
Entity Address, City or Town	Newark
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19702-5440
City Area Code	(202)
Local Phone Number	872-2000
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock Shares Outstanding	8,546,017
Entity Central Index Key	0000008192
DISTRICT OF COLUMBIA \| Potomac Electric Power Company
Document Information [Line Items]
Entity Incorporation, State or Country Code	DC
VIRGINIA \| Potomac Electric Power Company
Document Information [Line Items]
Entity Incorporation, State or Country Code	VA
VIRGINIA \| Delmarva Power and Light Company
Document Information [Line Items]
Entity Incorporation, State or Country Code	VA
DELAWARE \| Delmarva Power and Light Company
Document Information [Line Items]
Entity Incorporation, State or Country Code	DE

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - Exelon - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Gain (loss) on sale of assets and businesses	0	0	0	(2)
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income (Loss) before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income from continuing operations after income taxes	700	676	1,711	1,622
Net income from discontinued operations after income taxes (Note 2)	0	0	0	117
Net income	700	676	1,711	1,739
Net income attributable to noncontrolling interests	0	0	0	1
Net income attributable to common shareholders	700	676	1,711	1,738
Net income from continuing operations	700	676	1,711	1,622
Net income from discontinued operations	0	0	0	116
Other comprehensive income, net of income taxes
Actuarial losses reclassified to periodic benefit cost	16	9	22	33
Pension and non-pension postretirement benefit plans valuation adjustments	(3)	0	(16)	2
Unrealized gains on cash flow hedges	21	0	36	0
Other comprehensive income	34	9	42	35
Comprehensive income	734	685	1,753	1,774
Comprehensive income attributable to noncontrolling interests	0	0	0	1
Comprehensive income attributable to common shareholders/membership interest	$ 734	$ 685	$ 1,753	$ 1,773
Average shares of common stock outstanding:
Basic average shares of common stock outstanding (in shares)	996	988	996	983
Assumed exercise and/or distributions of stock-based awards (in shares)	1	1	0	1
Diluted average shares of common stock outstanding (in shares)	997	989	996	984
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share (in dollars per share)	$ 0.70	$ 0.68	$ 1.72	$ 1.65
Income (Loss) from Continuing Operations, Per Diluted Share (in dollars per share)	0.70	0.68	1.72	1.65
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share (in dollars per share)	0	0	0	0.12
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share (in dollars per share)	$ 0	$ 0	$ 0	$ 0.12
Related Party
Operating expenses
Purchased power and fuel from affiliates	$ 0	$ 0	$ 0	$ 159
Other income and (deductions)
Interest expense to affiliates	(6)	(6)	(18)	(19)
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	$ 33	$ 80	$ 449	$ 524

Consolidated Statements of Op_2

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - ComEd - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Gain (loss) on sale of assets and businesses	0	0	0	(2)
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income	700	676	1,711	1,739
Comprehensive income	734	685	1,753	1,774
Related Party
Operating expenses
Purchased power from affiliate	0	0	0	159
Other income and (deductions)
Interest expense to affiliates	(6)	(6)	(18)	(19)
Commonwealth Edison Co
Operating revenues
Revenues from alternative revenue programs	135	88	405	163
Total operating revenues	2,268	1,378	5,836	4,536
Operating expenses
Operating and maintenance	293	286	814	809
Depreciation and amortization	357	333	1,045	982
Taxes other than income taxes	100	104	282	289
Total operating expenses	1,738	913	4,472	3,357
Gain (loss) on sale of assets and businesses	0	0	0	(2)
Operating income	530	465	1,364	1,177
Other income and (deductions)
Interest expense, net	(116)	(101)	(347)	(298)
Other, net	16	14	50	40
Total other income and (deductions)	(103)	(90)	(307)	(268)
Income before income taxes	427	375	1,057	909
Income taxes	94	84	235	203
Net income	333	291	822	706
Comprehensive income	333	291	822	706
Commonwealth Edison Co \| Related Party
Operating revenues
Operating revenues from affiliates	9	6	14	14
Operating expenses
Purchased power from affiliate	0	0	0	59
Operating and maintenance from affiliates	92	69	263	236
Other income and (deductions)
Interest expense to affiliates	(3)	(3)	(10)	(10)
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Electricity, US Regulated \| Commonwealth Edison Co
Operating revenues
Electric operating revenues	2,124	1,284	5,417	4,359
Operating expenses
Purchased power and/or fuel	896	121	2,068	982
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	$ 33	$ 80	$ 449	$ 524

Consolidated Statements of Op_3

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - PECO - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income	700	676	1,711	1,739
Comprehensive income	734	685	1,753	1,774
Related Party
Operating expenses
Purchased power from affiliate	0	0	0	159
Other income and (deductions)
Interest expense to affiliates	(6)	(6)	(18)	(19)
PECO Energy Co
Operating revenues
Revenues from alternative revenue programs	11	(5)	1	1
Total operating revenues	1,037	1,014	2,977	2,877
Operating expenses
Operating and maintenance	217	197	622	561
Depreciation and amortization	100	92	297	277
Taxes other than income taxes	59	60	156	155
Total operating expenses	847	798	2,436	2,230
Operating income	190	216	541	647
Other income and (deductions)
Interest expense, net	(51)	(42)	(142)	(120)
Other, net	11	8	26	23
Total other income and (deductions)	(41)	(37)	(123)	(106)
Income before income taxes	149	179	418	541
Income taxes	3	44	8	67
Net income	146	135	410	474
Comprehensive income	146	135	410	474
PECO Energy Co \| Related Party
Operating revenues
Operating revenues from affiliates	2	3	6	5
Operating expenses
Purchased power from affiliate	0	0	0	33
Operating and maintenance from affiliates	60	46	164	144
Other income and (deductions)
Interest expense to affiliates	(1)	(3)	(7)	(9)
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Electricity, US Regulated \| PECO Energy Co
Operating revenues
Electric operating revenues	957	943	2,478	2,384
Operating expenses
Purchased power and/or fuel	396	377	994	850
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	33	80	449	524
Natural Gas, US Regulated \| PECO Energy Co
Operating revenues
Electric operating revenues	67	73	492	487
Operating expenses
Purchased power and/or fuel	$ 15	$ 26	$ 203	$ 210

Statements of Operations and Co

Statements of Operations and Comprehensive Income (Unaudited) - BGE - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income	700	676	1,711	1,739
Comprehensive income	734	685	1,753	1,774
Related Party
Operating expenses
Purchased power from affiliate	0	0	0	159
Baltimore Gas and Electric Company
Operating revenues
Revenues from alternative revenue programs	(22)	(8)	47	(40)
Total operating revenues	932	870	2,986	2,810
Operating expenses
Operating and maintenance	156	185	467	506
Depreciation and amortization	161	148	487	470
Taxes other than income taxes	80	77	239	225
Total operating expenses	835	810	2,503	2,446
Operating income	97	60	483	364
Other income and (deductions)
Interest expense, net	(47)	(39)	(135)	(110)
Other, net	6	5	14	16
Total other income and (deductions)	(41)	(34)	(121)	(94)
Income before income taxes	56	26	362	270
Income taxes	11	(7)	76	3
Net income	45	33	286	267
Comprehensive income	45	33	286	267
Baltimore Gas and Electric Company \| Related Party
Operating revenues
Operating revenues from affiliates	2	3	6	13
Operating expenses
Purchased power from affiliate	0	0	0	18
Operating and maintenance from affiliates	58	50	165	152
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Electricity, US Regulated \| Baltimore Gas and Electric Company
Operating revenues
Electric operating revenues	856	761	2,306	2,138
Operating expenses
Purchased power and/or fuel	371	320	975	846
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	33	80	449	524
Natural Gas, US Regulated \| Baltimore Gas and Electric Company
Operating revenues
Electric operating revenues	96	114	627	699
Operating expenses
Purchased power and/or fuel	$ 9	$ 30	$ 170	$ 229

Consolidated Statements of Op_4

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - PHI - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income	700	676	1,711	1,739
Comprehensive income	734	685	1,753	1,773
Related Party
Operating expenses
Purchased power from affiliate	0	0	0	159
Pepco Holdings LLC
Operating revenues
Revenues from alternative revenue programs	(15)	(11)	59	(33)
Total operating revenues	1,773	1,598	4,615	4,223
Operating expenses
Operating and maintenance	288	237	815	729
Depreciation and amortization	257	238	741	697
Taxes other than income taxes	134	129	366	362
Total operating expenses	1,440	1,254	3,864	3,535
Operating income	333	344	751	688
Other income and (deductions)
Interest expense, net	(80)	(72)	(238)	(216)
Other, net	28	19	80	56
Total other income and (deductions)	(52)	(53)	(158)	(160)
Income before income taxes	281	291	593	528
Income taxes	49	2	103	10
Net income	232	289	490	518
Comprehensive income	232	289	490	518
Pepco Holdings LLC \| Related Party
Operating revenues
Operating revenues from affiliates	2	3	7	9
Operating expenses
Purchased power from affiliate	0	0	0	50
Operating and maintenance from affiliates	51	40	137	138
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Electricity, US Regulated \| Pepco Holdings LLC
Operating revenues
Electric operating revenues	1,762	1,568	4,399	4,090
Operating expenses
Purchased power and/or fuel	701	586	1,729	1,474
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	33	80	449	524
Natural Gas, US Regulated \| Pepco Holdings LLC
Operating revenues
Electric operating revenues	24	38	150	157
Operating expenses
Purchased power and/or fuel	$ 9	$ 24	$ 76	$ 85

Statements of Operations and _2

Statements of Operations and Comprehensive Income (Unaudited) - Pepco - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Gain (loss) on sale of assets and businesses	0	0	0	(2)
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income	700	676	1,711	1,739
Comprehensive income	734	685	1,753	1,774
Related Party
Operating expenses
Purchased power from affiliate	0	0	0	159
Other income and (deductions)
Interest expense to affiliates	(6)	(6)	(18)	(19)
Potomac Electric Power Company
Operating revenues
Revenues from alternative revenue programs	(18)	(8)	28	(15)
Total operating revenues	822	724	2,174	1,919
Operating expenses
Operating and maintenance	89	69	264	214
Depreciation and amortization	112	99	329	312
Taxes other than income taxes	109	105	291	291
Total operating expenses	658	555	1,810	1,588
Operating income	164	169	364	331
Other income and (deductions)
Interest expense, net	(41)	(37)	(122)	(111)
Other, net	18	14	50	39
Total other income and (deductions)	(23)	(23)	(72)	(72)
Income before income taxes	141	146	292	259
Income taxes	21	1	43	(2)
Net income	120	145	249	261
Comprehensive income	120	145	249	261
Potomac Electric Power Company \| Related Party
Operating revenues
Operating revenues from affiliates	1	2	5	4
Operating expenses
Purchased power from affiliate	0	0	0	39
Operating and maintenance from affiliates	60	52	176	166
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Electricity, US Regulated \| Potomac Electric Power Company
Operating revenues
Electric operating revenues	839	730	2,141	1,930
Operating expenses
Purchased power and/or fuel	288	230	750	566
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	$ 33	$ 80	$ 449	$ 524

Statements of Operations and _3

Statements of Operations and Comprehensive Income (Unaudited) - DPL - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income	700	676	1,711	1,739
Comprehensive income	734	685	1,753	1,774
Related Party
Operating expenses
Purchased power from affiliate	0	0	0	159
Delmarva Power and Light Company
Operating revenues
Revenues from alternative revenue programs	(2)	0	10	(3)
Total operating revenues	450	412	1,273	1,176
Operating expenses
Operating and maintenance	60	45	150	142
Depreciation and amortization	62	59	182	172
Taxes other than income taxes	19	19	57	54
Total operating expenses	386	345	1,079	999
Operating income	64	67	194	177
Other income and (deductions)
Interest expense, net	(18)	(16)	(53)	(48)
Other, net	5	3	12	9
Total other income and (deductions)	(13)	(13)	(41)	(39)
Income before income taxes	51	54	153	138
Income taxes	8	2	25	8
Net income	43	52	128	130
Comprehensive income	43	52	128	130
Delmarva Power and Light Company \| Related Party
Operating revenues
Operating revenues from affiliates	2	1	5	5
Operating expenses
Purchased power from affiliate	0	0	0	10
Operating and maintenance from affiliates	44	39	128	124
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Electricity, US Regulated \| Delmarva Power and Light Company
Operating revenues
Electric operating revenues	426	373	1,108	1,017
Operating expenses
Purchased power and/or fuel	192	159	486	412
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	33	80	449	524
Natural Gas, US Regulated \| Delmarva Power and Light Company
Operating revenues
Electric operating revenues	24	38	150	157
Operating expenses
Purchased power and/or fuel	$ 9	$ 24	$ 76	$ 85

Consolidated Statements of Op_5

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - ACE - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 108	$ 64	$ 513	$ 92
Total operating revenues	5,980	4,845	16,360	14,412
Operating expenses
Operating and maintenance	1,187	1,148	3,535	3,436
Depreciation and amortization	890	825	2,616	2,472
Taxes other than income taxes	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Gain (loss) on sale of assets and businesses	0	0	0	(2)
Operating income	1,123	1,011	2,931	2,606
Other income and (deductions)
Interest expense, net	(431)	(359)	(1,259)	(1,044)
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income before income taxes	767	768	1,985	1,978
Income taxes	67	92	274	356
Net income	700	676	1,711	1,739
Comprehensive income	734	685	1,753	1,774
Related Party
Operating expenses
Purchased power from affiliate	0	0	0	159
Other income and (deductions)
Interest expense to affiliates	(6)	(6)	(18)	(19)
Atlantic City Electric Company
Operating revenues
Revenues from alternative revenue programs	5	(3)	21	(14)
Total operating revenues	502	462	1,172	1,120
Operating expenses
Operating and maintenance	56	47	147	145
Depreciation and amortization	77	74	212	192
Taxes other than income taxes	2	2	7	7
Total operating expenses	394	353	971	947
Operating income	108	109	201	173
Other income and (deductions)
Interest expense, net	(19)	(17)	(52)	(49)
Other, net	5	3	13	9
Total other income and (deductions)	(14)	(14)	(39)	(40)
Income before income taxes	94	95	162	133
Income taxes	23	1	40	2
Net income	71	94	122	131
Comprehensive income	71	94	122	131
Atlantic City Electric Company \| Related Party
Operating revenues
Operating revenues from affiliates	0	0	1	2
Operating expenses
Purchased power from affiliate	0	0	0	2
Operating and maintenance from affiliates	38	33	112	106
Electricity, US Regulated
Operating revenues
Electric operating revenues	5,684	4,557	14,579	12,972
Operating expenses
Purchased power and/or fuel	2,364	1,404	5,766	4,152
Electricity, US Regulated \| Atlantic City Electric Company
Operating revenues
Electric operating revenues	497	465	1,150	1,132
Operating expenses
Purchased power and/or fuel	221	197	493	495
Natural Gas, US Regulated
Operating revenues
Electric operating revenues	188	224	1,268	1,348
Operating expenses
Purchased power and/or fuel	$ 33	$ 80	$ 449	$ 524

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - Exelon - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,616	2,679
Asset impairments	0	46
Gain on sales of assets and businesses	0	(8)
Deferred income taxes and amortization of investment tax credits	210	256
Net fair value changes related to derivatives	21	(59)
Net realized and unrealized losses on NDT funds	0	205
Net unrealized losses on equity investments	0	(16)
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Option premiums paid, net	0	(39)
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	(395)	(689)
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Proceeds from NDT fund sales	0	488
Investment in NDT funds	0	(516)
Collection of deferred purchase price	0	169
Proceeds from Sale of Property Held-for-sale	0	16
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Proceeds from short-term borrowings with maturities greater than 90 days	400	1,150
Repayments on short-term borrowings with maturities greater than 90 days	(150)	(925)
Issuance of long-term debt	5,300	5,801
Retirement of long-term debt	(1,209)	(2,067)
Issuance of common stock	0	563
Dividends paid on common stock	(1,074)	(999)
Proceeds from employee stock plans	30	26
Transfer of cash, restricted cash, and cash equivalents to Constellation	0	(2,594)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
Decrease in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
Increase in DPP	0	348
(Decrease) increase in PP&E related to ARO update	$ (4)	$ 331

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Unaudited) - ComEd - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,616	2,679
Asset impairments	0	46
Gain on sales of assets and businesses	0	(8)
Deferred income taxes and amortization of investment tax credits	210	256
Net fair value changes related to derivatives	21	(59)
Net realized and unrealized (gains) losses on NDT funds	0	205
Net unrealized (gains) losses on equity investments	0	16
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Changes In Option Premiums Collected Received	0	39
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	(395)	(689)
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Proceeds from short-term borrowings with maturities greater than 90 days	400	1,150
Repayments on short-term borrowings with maturities greater than 90 days	(150)	(925)
Issuance of long-term debt	5,300	5,801
Retirement of long-term debt	(1,209)	(2,067)
Dividends paid on common stock	(1,074)	(999)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
(Decrease) increase in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
Commonwealth Edison Co
Cash flows from operating activities
Net income	822	706
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	1,045	982
Deferred income taxes and amortization of investment tax credits	164	192
Other non-cash operating activities	(392)	(89)
Changes in assets and liabilities:
Accounts receivable	(111)	(351)
Receivables from and payables to affiliates, net	(12)	(54)
Inventories	(64)	(9)
Accounts payable and accrued expenses	(199)	226
Collateral (paid) received, net	28	69
Income taxes	50	0
Regulatory assets and liabilities, net	(248)	(499)
Pension and non-pension postretirement benefit contributions	(26)	(179)
Other assets and liabilities	(72)	(152)
Net cash flows provided by operating activities	985	842
Cash flows from investing activities
Capital expenditures	(1,926)	(1,801)
Other investing activities	8	21
Net cash flows used in investing activities	(1,918)	(1,780)
Cash flows from financing activities
Changes in short-term borrowings	(150)	233
Proceeds from short-term borrowings with maturities greater than 90 days	400	0
Repayments on short-term borrowings with maturities greater than 90 days	(150)	0
Issuance of long-term debt	975	750
Dividends paid on common stock	(560)	(434)
Contributions from parent	570	503
Other financing activities	(12)	(10)
Net cash flows provided by financing activities	1,073	1,042
(Decrease) increase in cash, restricted cash, and cash equivalents	140	104
Cash, restricted cash, and cash equivalents at beginning of period	511	384
Cash, restricted cash, and cash equivalents at end of period	651	488
Supplemental cash flow information
Decrease in capital expenditures not paid	$ (27)	$ (30)

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows (Unaudited) - PECO - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,616	2,679
Asset impairments	0	46
Gain on sales of assets and businesses	0	(8)
Deferred income taxes and amortization of investment tax credits	210	256
Net fair value changes related to derivatives	21	(59)
Net realized and unrealized (gains) losses on NDT funds	0	205
Net unrealized (gains) losses on equity investments	0	16
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Option premiums paid, net	0	(39)
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	395	689
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Issuance of long-term debt	5,300	5,801
Retirement of long-term debt	(1,209)	(2,067)
Dividends paid on common stock	(1,074)	(999)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
(Decrease) increase in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
PECO Energy Co
Cash flows from operating activities
Net income	410	474
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	297	277
Deferred income taxes and amortization of investment tax credits	(44)	49
Other non-cash operating activities	2	14
Changes in assets and liabilities:
Accounts receivable	135	(49)
Receivables from and payables to affiliates, net	(2)	(34)
Inventories	35	(59)
Accounts payable and accrued expenses	(132)	25
Income taxes	76	30
Regulatory assets and liabilities, net	1	(27)
Pension and non-pension postretirement benefit contributions	(1)	(13)
Other assets and liabilities	0	(31)
Net cash flows provided by operating activities	777	656
Cash flows from investing activities
Capital expenditures	(1,068)	(991)
Changes in Exelon intercompany money pool	(51)	0
Other investing activities	1	8
Net cash flows used in investing activities	(1,118)	(983)
Cash flows from financing activities
Changes in short-term borrowings	(239)	0
Issuance of long-term debt	575	775
Retirement of long-term debt	(50)	(350)
Dividends paid on common stock	(303)	(299)
Contributions from parent	348	274
Other financing activities	(6)	(14)
Net cash flows provided by financing activities	325	386
(Decrease) increase in cash, restricted cash, and cash equivalents	(16)	59
Cash, restricted cash, and cash equivalents at beginning of period	68	44
Cash, restricted cash, and cash equivalents at end of period	52	103
Supplemental cash flow information
Decrease in capital expenditures not paid	$ (22)	$ 7

Statements of Cash Flows (Unaud

Statements of Cash Flows (Unaudited) - BGE - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,616	2,679
Asset impairments	0	46
Gain on sales of assets and businesses	0	(8)
Deferred income taxes and amortization of investment tax credits	210	256
Net fair value changes related to derivatives	21	(59)
Net realized and unrealized (gains) losses on NDT funds	0	205
Net unrealized (gains) losses on equity investments	0	16
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Option premiums paid, net	0	(39)
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	(395)	(689)
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Proceeds from NDT fund sales	0	488
Investment in NDT funds	0	(516)
Collection of deferred purchase price	0	169
Proceeds from Sale of Property Held-for-sale	0	16
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Proceeds from short-term borrowings with maturities greater than 90 days	400	1,150
Repayments on short-term borrowings with maturities greater than 90 days	(150)	(925)
Issuance of long-term debt	5,300	5,801
Retirement of long-term debt	(1,209)	(2,067)
Issuance of common stock	0	563
Dividends paid on common stock	(1,074)	(999)
Proceeds from employee stock plans	30	26
Transfer of cash, restricted cash, and cash equivalents to Constellation	0	(2,594)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
(Decrease) increase in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
Increase in DPP	0	348
Baltimore Gas and Electric Company
Cash flows from operating activities
Net income	286	267
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	487	470
Asset impairments	0	46
Deferred income taxes and amortization of investment tax credits	41	1
Other non-cash operating activities	0	101
Changes in assets and liabilities:
Accounts receivable	194	18
Receivables from and payables to affiliates, net	(7)	(9)
Inventories	45	(74)
Accounts payable and accrued expenses	(38)	15
Collateral (paid) received, net	(22)	125
Income taxes	19	(20)
Regulatory assets and liabilities, net	(151)	(113)
Pension and non-pension postretirement benefit contributions	(15)	(64)
Other assets and liabilities	46	14
Net cash flows provided by operating activities	885	777
Cash flows from investing activities
Capital expenditures	(986)	(918)
Other investing activities	6	7
Net cash flows used in investing activities	(980)	(911)
Cash flows from financing activities
Changes in short-term borrowings	(349)	26
Issuance of long-term debt	700	500
Retirement of long-term debt	(300)	(250)
Dividends paid on common stock	(237)	(225)
Contributions from parent	237	186
Other financing activities	(7)	(8)
Net cash flows provided by financing activities	44	229
(Decrease) increase in cash, restricted cash, and cash equivalents	(51)	95
Cash, restricted cash, and cash equivalents at beginning of period	67	55
Cash, restricted cash, and cash equivalents at end of period	16	150
Supplemental cash flow information
Decrease in capital expenditures not paid	$ (17)	$ 12

Consolidated Statements of Ca_4

Consolidated Statements of Cash Flows (Unaudited) - PHI - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	2,616	2,679
Deferred income taxes and amortization of investment tax credits	210	256
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	(395)	(689)
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Issuance of long-term debt	5,300	5,801
Retirement of long-term debt	(1,209)	(2,067)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
(Decrease) increase in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
Pepco Holdings LLC
Cash flows from operating activities
Net income	490	518
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	741	697
Deferred income taxes and amortization of investment tax credits	44	(2)
Other non-cash operating activities	80	112
Changes in assets and liabilities:
Accounts receivable	(160)	(143)
Receivables from and payables to affiliates, net	(8)	(49)
Inventories	(22)	(35)
Accounts payable and accrued expenses	23	(15)
Collateral (paid) received, net	(191)	230
Income taxes	37	(3)
Regulatory assets and liabilities, net	(2)	(82)
Pension and non-pension postretirement benefit contributions	(15)	(75)
Other assets and liabilities	(98)	(71)
Net cash flows provided by operating activities	919	1,082
Cash flows from investing activities
Capital expenditures	(1,510)	(1,174)
Other investing activities	8	5
Net cash flows used in investing activities	(1,502)	(1,169)
Cash flows from financing activities
Changes in short-term borrowings	(241)	(468)
Issuance of long-term debt	550	925
Retirement of long-term debt	0	(310)
Changes in Exelon intercompany money pool	18	36
Distributions to member	(410)	(625)
Contributions from member	475	787
Other financing activities	(36)	(18)
Net cash flows provided by financing activities	356	327
(Decrease) increase in cash, restricted cash, and cash equivalents	(227)	240
Cash, restricted cash, and cash equivalents at beginning of period	373	213
Cash, restricted cash, and cash equivalents at end of period	146	453
Supplemental cash flow information
Decrease in capital expenditures not paid	$ (96)	$ (8)

Statements of Cash Flows (Una_2

Statements of Cash Flows (Unaudited) - Pepco - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,616	2,679
Asset impairments	0	46
Gain on sales of assets and businesses	0	(8)
Deferred income taxes and amortization of investment tax credits	210	256
Net fair value changes related to derivatives	21	(59)
Net realized and unrealized (gains) losses on NDT funds	0	205
Net unrealized (gains) losses on equity investments	0	16
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Option premiums paid, net	0	(39)
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	(395)	(689)
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Issuance of long-term debt	5,300	5,801
Retirement of long-term debt	(1,209)	(2,067)
Dividends paid on common stock	(1,074)	(999)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
(Decrease) increase in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
Increase in DPP	0	348
Potomac Electric Power Company
Cash flows from operating activities
Net income	249	261
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	329	312
Deferred income taxes and amortization of investment tax credits	22	(5)
Other non-cash operating activities	38	20
Changes in assets and liabilities:
Accounts receivable	(84)	(87)
Receivables from and payables to affiliates, net	(2)	(31)
Inventories	(12)	(19)
Accounts payable and accrued expenses	33	11
Collateral (paid) received, net	(26)	46
Income taxes	15	(25)
Regulatory assets and liabilities, net	(7)	(44)
Pension and non-pension postretirement benefit contributions	(9)	(9)
Other assets and liabilities	(13)	(29)
Net cash flows provided by operating activities	533	401
Cash flows from investing activities
Capital expenditures	(710)	(595)
Changes in Exelon intercompany money pool	7	0
Other investing activities	8	2
Net cash flows used in investing activities	(709)	(593)
Cash flows from financing activities
Changes in short-term borrowings	(299)	(175)
Issuance of long-term debt	350	625
Retirement of long-term debt	0	(310)
Changes in Exelon intercompany money pool	0	25
Dividends paid on common stock	(200)	(400)
Contributions from parent	308	465
Other financing activities	(26)	(8)
Net cash flows provided by financing activities	133	222
(Decrease) increase in cash, restricted cash, and cash equivalents	(43)	30
Cash, restricted cash, and cash equivalents at beginning of period	99	68
Cash, restricted cash, and cash equivalents at end of period	56	98
Supplemental cash flow information
Decrease in capital expenditures not paid	(39)	2
Baltimore Gas and Electric Company
Cash flows from operating activities
Net income	286	267
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	487	470
Asset impairments	0	46
Deferred income taxes and amortization of investment tax credits	41	1
Other non-cash operating activities	0	101
Changes in assets and liabilities:
Accounts receivable	194	18
Receivables from and payables to affiliates, net	(7)	(9)
Inventories	45	(74)
Accounts payable and accrued expenses	(38)	15
Collateral (paid) received, net	(22)	125
Income taxes	19	(20)
Regulatory assets and liabilities, net	(151)	(113)
Pension and non-pension postretirement benefit contributions	(15)	(64)
Other assets and liabilities	46	14
Net cash flows provided by operating activities	885	777
Cash flows from investing activities
Capital expenditures	(986)	(918)
Other investing activities	6	7
Net cash flows used in investing activities	(980)	(911)
Cash flows from financing activities
Changes in short-term borrowings	(349)	26
Issuance of long-term debt	700	500
Retirement of long-term debt	(300)	(250)
Dividends paid on common stock	(237)	(225)
Contributions from parent	237	186
Other financing activities	(7)	(8)
Net cash flows provided by financing activities	44	229
(Decrease) increase in cash, restricted cash, and cash equivalents	(51)	95
Cash, restricted cash, and cash equivalents at beginning of period	67	55
Cash, restricted cash, and cash equivalents at end of period	16	150
Supplemental cash flow information
Decrease in capital expenditures not paid	$ (17)	$ 12

Statements of Cash Flows (Una_3

Statements of Cash Flows (Unaudited) - DPL - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,616	2,679
Deferred income taxes and amortization of investment tax credits	210	256
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	(395)	(689)
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Issuance of long-term debt	5,300	5,801
Dividends paid on common stock	(1,074)	(999)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
(Decrease) increase in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
Delmarva Power and Light Company
Cash flows from operating activities
Net income	128	130
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	182	172
Deferred income taxes and amortization of investment tax credits	4	9
Other non-cash operating activities	11	22
Changes in assets and liabilities:
Accounts receivable	9	(3)
Receivables from and payables to affiliates, net	3	(8)
Inventories	2	(11)
Accounts payable and accrued expenses	(1)	0
Collateral (paid) received, net	(120)	114
Income taxes	15	4
Regulatory assets and liabilities, net	33	(23)
Pension and non-pension postretirement benefit contributions	0	(1)
Other assets and liabilities	8	23
Net cash flows provided by operating activities	274	428
Cash flows from investing activities
Capital expenditures	(416)	(294)
Changes in Exelon intercompany money pool	(10)	(25)
Other investing activities	0	2
Net cash flows used in investing activities	(426)	(317)
Cash flows from financing activities
Changes in short-term borrowings	(115)	(149)
Issuance of long-term debt	125	125
Dividends paid on common stock	(97)	(95)
Contributions from parent	99	147
Other financing activities	(6)	(4)
Net cash flows provided by financing activities	6	24
(Decrease) increase in cash, restricted cash, and cash equivalents	(146)	135
Cash, restricted cash, and cash equivalents at beginning of period	152	71
Cash, restricted cash, and cash equivalents at end of period	6	206
Supplemental cash flow information
Decrease in capital expenditures not paid	$ 0	$ 2

Consolidated Statements of Ca_5

Consolidated Statements of Cash Flows (Unaudited) - ACE - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 1,711	$ 1,739
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,616	2,679
Asset impairments	0	46
Gain on sales of assets and businesses	0	(8)
Deferred income taxes and amortization of investment tax credits	210	256
Net fair value changes related to derivatives	21	(59)
Net realized and unrealized (gains) losses on NDT funds	0	205
Net unrealized (gains) losses on equity investments	0	16
Other non-cash operating activities	(237)	265
Changes in assets and liabilities:
Accounts receivable	82	(1,049)
Inventories	(8)	(121)
Accounts payable and accrued expenses	(454)	823
Option premiums paid, net	0	(39)
Collateral (paid) received, net	(183)	1,456
Income taxes	50	3
Regulatory assets and liabilities, net	(395)	(689)
Pension and non-pension postretirement benefit contributions	(97)	(596)
Other assets and liabilities	(24)	(786)
Net cash flows provided by operating activities	3,292	4,141
Cash flows from investing activities
Capital expenditures	(5,540)	(5,179)
Other investing activities	25	36
Net cash flows used in investing activities	(5,515)	(4,986)
Cash flows from financing activities
Changes in short-term borrowings	(1,116)	(335)
Issuance of long-term debt	5,300	5,801
Retirement of long-term debt	(1,209)	(2,067)
Dividends paid on common stock	(1,074)	(999)
Other financing activities	(101)	(121)
Net cash flows provided by financing activities	2,080	499
(Decrease) increase in cash, restricted cash, and cash equivalents	(143)	(346)
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	947	1,273
Supplemental cash flow information
Decrease in capital expenditures not paid	(169)	(147)
Atlantic City Electric Company
Cash flows from operating activities
Net income	122	131
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	212	192
Deferred income taxes and amortization of investment tax credits	24	2
Other non-cash operating activities	(2)	36
Changes in assets and liabilities:
Accounts receivable	(85)	(53)
Receivables from and payables to affiliates, net	(6)	(10)
Inventories	(11)	(6)
Accounts payable and accrued expenses	(4)	(10)
Collateral (paid) received, net	(45)	70
Income taxes	6	7
Regulatory assets and liabilities, net	(28)	(6)
Pension and non-pension postretirement benefit contributions	(1)	(7)
Other assets and liabilities	(80)	(54)
Net cash flows provided by operating activities	102	292
Cash flows from investing activities
Capital expenditures	(376)	(284)
Other investing activities	0	1
Net cash flows used in investing activities	(376)	(283)
Cash flows from financing activities
Changes in short-term borrowings	173	(144)
Issuance of long-term debt	75	175
Changes in Exelon intercompany money pool	17	0
Dividends paid on common stock	(111)	(128)
Contributions from parent	65	175
Other financing activities	(3)	(4)
Net cash flows provided by financing activities	216	74
(Decrease) increase in cash, restricted cash, and cash equivalents	(58)	83
Cash, restricted cash, and cash equivalents at beginning of period	72	29
Cash, restricted cash, and cash equivalents at end of period	14	112
Supplemental cash flow information
Decrease in capital expenditures not paid	$ (56)	$ (12)

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - Exelon - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 300	$ 407	$ 446	$ 672
Restricted cash and cash equivalents	435	566	$ 744	$ 321
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Fossil fuel	105	208
Materials and supplies	657	547
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,923	2,897
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Mark-to-market derivative liabilities	44	8
Unamortized energy contract liabilities	8	10
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Pension obligations	1,085	1,109
Non-pension postretirement benefit obligations	515	507
Asset retirement obligations	269	269
Mark-to-market derivative liabilities	113	83
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Shareholders’ equity
Common stock	20,956	20,908
Treasury stock, at cost	(123)	(123)
Retained earnings	5,233	4,597
Accumulated other comprehensive loss, net	(596)	(638)
Total shareholders’ equity	25,470	24,744
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Long-term debt to financing trusts	390	390
Nonrelated Party
Current liabilities
Accounts payable	$ 2,684	$ 3,382

Consolidated Balance Sheets - E

Consolidated Balance Sheets - Exelon (Parentheticals) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accumulated depreciation and amortization	$ 16,836	$ 15,930
Common stock (in dollars)	$ 0	$ 0
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares outstanding (in shares)	995	994
Treasury stock, common (in shares)	2	2

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) - ComEd - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,923	2,897
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Mark-to-market derivative liabilities	44	8
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Non-pension postretirement benefit obligations	515	507
Mark-to-market derivative liabilities	113	83
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Shareholders’ equity
Common stock	20,956	20,908
Retained earnings	5,233	4,597
Total shareholders’ equity	25,470	24,744
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Long-term debt to financing trusts	390	390
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
Commonwealth Edison Co
Current assets
Cash and cash equivalents	79	67
Restricted cash and cash equivalents	360	327
Accounts receivable
Customer accounts receivable	842	558
Customer allowance for credit losses	(76)	(59)
Customer accounts receivable, net	766	499
Other accounts receivable	249	441
Other allowance for credit losses	(20)	(17)
Other accounts receivable, net	229	424
Inventories, net
Inventories, net	260	196
Regulatory assets	1,439	775
Other	113	92
Total current assets	3,249	2,383
Property, plant and equipment, net	28,678	27,513
Deferred debits and other assets
Regulatory assets	2,736	2,667
Goodwill	2,625	2,625
Receivable related to Regulatory Agreement Units	2,716	2,660
Investments	6	6
Prepaid pension asset	1,220	1,206
Total deferred debits and other assets	10,115	9,765
Total assets	42,042	39,661
Current liabilities
Short-term borrowings	677	577
Accrued expenses	405	415
Customer deposits	115	108
Regulatory liabilities	189	226
Mark-to-market derivative liabilities	21	5
Total current liabilities	2,520	2,606
Long-term debt	11,484	10,518
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	5,269	5,021
Regulatory liabilities	7,190	6,913
Asset retirement obligations	151	148
Non-pension postretirement benefit obligations	172	165
Mark-to-market derivative liabilities	113	79
Other	740	642
Total deferred credits and other liabilities	13,635	12,968
Total liabilities	27,844	26,297
Commitments and contingencies
Shareholders’ equity
Common stock	1,588	1,588
Other paid-in capital	10,316	9,746
Retained earnings	2,294	2,030
Total shareholders’ equity	14,198	13,364
Total liabilities and shareholders’ equity	42,042	39,661
Commonwealth Edison Co \| Related Party
Accounts receivable
Receivables from affiliates	3	3
Current liabilities
Accounts payable	62	74
Long-term debt to financing trusts	205	205
Commonwealth Edison Co \| Nonrelated Party
Deferred debits and other assets
Other	812	601
Current liabilities
Accounts payable	850	1,010
Other	$ 201	$ 191

Consolidated Balance Sheets - C

Consolidated Balance Sheets - ComEd (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ 16,836	$ 15,930
Commonwealth Edison Co
Accumulated depreciation and amortization	$ 7,061	$ 6,673

Consolidated Balance Sheets (_3

Consolidated Balance Sheets (Unaudited) - PECO - USD ($) shares in Millions, $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Fossil fuel	105	208
Materials and supplies	657	547
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,923	2,897
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Mark-to-market derivative liabilities	44	8
Unamortized energy contract liabilities	8	10
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Pension obligations	1,085	1,109
Non-pension postretirement benefit obligations	515	507
Mark-to-market derivative liabilities	113	83
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Common stock (in dollars)	$ 0	$ 0
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares outstanding (in shares)	995	994
Shareholders’ equity
Common stock	$ 20,956	$ 20,908
Treasury stock, common (in shares)	2	2
Treasury stock, at cost	$ (123)	$ (123)
Accumulated other comprehensive loss, net	(596)	(638)
Retained earnings	5,233	4,597
Total shareholders’ equity	25,470	24,744
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Long-term debt to financing trusts	390	390
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
PECO Energy Co
Current assets
Cash and cash equivalents	43	59
Restricted cash and cash equivalents	9	9
Accounts receivable
Customer accounts receivable	467	635
Customer allowance for credit losses	(95)	(105)
Customer accounts receivable, net	372	530
Other accounts receivable	136	153
Other allowance for credit losses	(8)	(9)
Other accounts receivable, net	128	144
Inventories, net
Fossil fuel	56	99
Materials and supplies	60	52
Prepaid utility taxes	17	0
Regulatory assets	120	80
Other	52	38
Total current assets	909	1,015
Property, plant and equipment, net	12,895	12,125
Deferred debits and other assets
Regulatory assets	762	652
Receivable related to Regulatory Agreement Units	206	237
Investments	34	30
Prepaid pension asset	425	413
Total deferred debits and other assets	1,455	1,362
Total assets	15,259	14,502
Current liabilities
Short-term borrowings	0	239
Long-term debt due within one year	0	50
Accrued expenses	183	142
Customer deposits	77	63
Regulatory liabilities	112	75
Total current liabilities	1,001	1,311
Long-term debt	5,133	4,562
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,286	2,213
Regulatory liabilities	239	270
Asset retirement obligations	27	28
Non-pension postretirement benefit obligations	287	286
Other	85	85
Total deferred credits and other liabilities	2,924	2,882
Total liabilities	9,242	8,939
Commitments and contingencies
Shareholders’ equity
Common stock	4,050	3,702
Retained earnings	1,967	1,861
Total shareholders’ equity	6,017	5,563
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	15,259	14,502
PECO Energy Co \| Related Party
Accounts receivable
Receivables from affiliates	1	4
Receivable from Exelon/PHI intercompany money pool	51	0
Current liabilities
Accounts payable	37	42
Long-term debt to financing trusts	184	184
PECO Energy Co \| Nonrelated Party
Deferred debits and other assets
Other	28	30
Current liabilities
Accounts payable	543	668
Other	$ 49	$ 32

Consolidated Balance Sheets - P

Consolidated Balance Sheets - PECO (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ 16,836	$ 15,930
PECO Energy Co
Accumulated depreciation and amortization	$ 4,056	$ 4,078

Balance Sheets (Unaudited) - BG

Balance Sheets (Unaudited) - BGE - USD ($) shares in Millions, $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Fossil fuel	105	208
Materials and supplies	657	547
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,923	2,897
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Mark-to-market derivative liabilities	44	8
Unamortized energy contract liabilities	8	10
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Pension obligations	1,085	1,109
Non-pension postretirement benefit obligations	515	507
Mark-to-market derivative liabilities	113	83
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Common stock (in dollars)	$ 0	$ 0
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares outstanding (in shares)	995	994
Shareholders’ equity
Common stock	$ 20,956	$ 20,908
Treasury stock, common (in shares)	2	2
Treasury stock, at cost	$ (123)	$ (123)
Accumulated other comprehensive loss, net	(596)	(638)
Retained earnings	5,233	4,597
Total shareholders’ equity	25,470	24,744
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Long-term debt to financing trusts	390	390
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
Baltimore Gas and Electric Company
Current assets
Cash and cash equivalents	15	43
Restricted cash and cash equivalents	1	24
Accounts receivable
Customer accounts receivable	438	617
Customer allowance for credit losses	(52)	(54)
Customer accounts receivable, net	386	563
Other accounts receivable	110	132
Other allowance for credit losses	(9)	(10)
Other accounts receivable, net	101	122
Inventories, net
Fossil fuel	41	91
Materials and supplies	70	65
Prepaid utility taxes	1	52
Regulatory assets	227	177
Other	19	13
Total current assets	861	1,150
Property, plant and equipment, net	11,893	11,338
Deferred debits and other assets
Regulatory assets	591	527
Investments	9	7
Prepaid pension asset	259	291
Total deferred debits and other assets	895	862
Total assets	13,649	13,350
Current liabilities
Short-term borrowings	59	408
Long-term debt due within one year	0	300
Accrued expenses	224	159
Customer deposits	111	105
Regulatory liabilities	36	47
Total current liabilities	861	1,575
Long-term debt	4,601	3,907
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	1,905	1,832
Regulatory liabilities	787	816
Asset retirement obligations	32	30
Non-pension postretirement benefit obligations	160	166
Other	81	88
Total deferred credits and other liabilities	2,965	2,932
Total liabilities	8,427	8,414
Commitments and contingencies
Shareholders’ equity
Common stock	3,098	2,861
Retained earnings	2,124	2,075
Total shareholders’ equity	5,222	4,936
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	13,649	13,350
Baltimore Gas and Electric Company \| Related Party
Accounts receivable
Receivables from affiliates	0	0
Current liabilities
Accounts payable	33	39
Baltimore Gas and Electric Company \| Nonrelated Party
Deferred debits and other assets
Other	36	37
Current liabilities
Accounts payable	364	462
Other	$ 34	$ 55

Balance Sheets - BGE (Parenthet

Balance Sheets - BGE (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ 16,836	$ 15,930
Baltimore Gas and Electric Company
Accumulated depreciation and amortization	$ 4,679	$ 4,583

Consolidated Balance Sheets (_4

Consolidated Balance Sheets (Unaudited) - PHI - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Fossil fuel	105	208
Materials and supplies	657	547
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Unamortized energy contract liabilities	8	10
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Non-pension postretirement benefit obligations	515	507
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Members' Equity [Abstract]
Retained earnings	5,233	4,597
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
Pepco Holdings LLC
Current assets
Cash and cash equivalents	121	198
Restricted cash and cash equivalents	25	175
Accounts receivable
Customer accounts receivable	828	734
Customer allowance for credit losses	(118)	(109)
Customer accounts receivable, net	710	625
Other accounts receivable	331	300
Other allowance for credit losses	(51)	(46)
Other accounts receivable, net	280	254
Inventories, net
Fossil fuel	9	18
Materials and supplies	267	236
Regulatory assets	366	455
Other	77	96
Total current assets	1,858	2,059
Property, plant and equipment, net	18,577	17,686
Deferred debits and other assets
Regulatory assets	1,568	1,610
Goodwill	4,005	4,005
Investments	143	138
Prepaid pension asset	289	353
Total deferred debits and other assets	6,221	6,337
Total assets	26,656	26,082
Current liabilities
Short-term borrowings	173	414
Long-term debt due within one year	1,146	591
Accrued expenses	324	260
Customer deposits	98	88
Regulatory liabilities	87	76
Unamortized energy contract liabilities	8	10
PPA termination obligation	61	87
Total current liabilities	2,810	2,737
Long-term debt	7,491	7,529
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	3,023	2,895
Regulatory liabilities	924	1,011
Asset retirement obligations	54	59
Non-pension postretirement benefit obligations	45	50
Unamortized energy contract liabilities	29	35
Other	495	536
Total deferred credits and other liabilities	4,570	4,586
Total liabilities	14,871	14,852
Commitments and contingencies
Members' Equity [Abstract]
Membership interest	12,057	11,582
Retained earnings	(272)	(352)
Total members' equity	11,785	11,230
Total liabilities and shareholders’ equity	26,656	26,082
Pepco Holdings LLC \| Related Party
Accounts receivable
Receivables from affiliates	3	2
Current liabilities
Accounts payable	59	66
Other	61	44
Pepco Holdings LLC \| Nonrelated Party
Deferred debits and other assets
Other	216	231
Current liabilities
Accounts payable	664	771
Other	$ 129	$ 330

Consolidated Balance Sheets -_2

Consolidated Balance Sheets - PHI (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ 16,836	$ 15,930
Pepco Holdings LLC
Accumulated depreciation and amortization	$ 3,044	$ 2,618

Balance Sheets (Unaudited) - Pe

Balance Sheets (Unaudited) - Pepco - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Pension obligations	1,085	1,109
Non-pension postretirement benefit obligations	515	507
Mark-to-market derivative liabilities	113	83
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Shareholders’ equity
Common stock	20,956	20,908
Retained earnings	5,233	4,597
Total shareholders’ equity	25,470	24,744
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
Potomac Electric Power Company
Current assets
Cash and cash equivalents	31	45
Restricted cash and cash equivalents	25	54
Accounts receivable
Customer accounts receivable	414	351
Customer allowance for credit losses	(56)	(47)
Customer accounts receivable, net	358	304
Other accounts receivable	189	180
Other allowance for credit losses	(29)	(25)
Other accounts receivable, net	160	155
Inventories, net
Inventories, net	147	135
Regulatory assets	187	235
Other	16	53
Total current assets	931	981
Property, plant and equipment, net	9,274	8,794
Deferred debits and other assets
Regulatory assets	422	437
Investments	124	119
Prepaid pension asset	252	273
Total deferred debits and other assets	856	882
Total assets	11,061	10,657
Current liabilities
Short-term borrowings	0	299
Long-term debt due within one year	405	4
Accrued expenses	163	125
Customer deposits	45	39
Regulatory liabilities	24	6
Merger related obligation	26	26
Total current liabilities	1,090	1,008
Long-term debt	3,690	3,747
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	1,456	1,382
Regulatory liabilities	394	455
Asset retirement obligations	36	39
Other	256	244
Total deferred credits and other liabilities	2,142	2,120
Total liabilities	6,922	6,875
Commitments and contingencies
Shareholders’ equity
Common stock	3,075	2,767
Retained earnings	1,064	1,015
Total shareholders’ equity	4,139	3,782
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	11,061	10,657
Potomac Electric Power Company \| Related Party
Accounts receivable
Receivables from affiliates	0	0
Receivable from Exelon/PHI intercompany money pool	7	0
Current liabilities
Accounts payable	32	34
Potomac Electric Power Company \| Nonrelated Party
Deferred debits and other assets
Other	58	53
Current liabilities
Accounts payable	346	382
Other	$ 49	$ 93

Balance Sheets (Unaudited) - _2

Balance Sheets (Unaudited) - Pepco (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ 16,836	$ 15,930
Potomac Electric Power Company
Accumulated depreciation and amortization	$ 4,231	$ 4,067

Balance Sheets (Unaudited) - DP

Balance Sheets (Unaudited) - DPL - USD ($) shares in Millions, $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Fossil fuel	105	208
Materials and supplies	657	547
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,923	2,897
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Mark-to-market derivative liabilities	44	8
Unamortized energy contract liabilities	8	10
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Pension obligations	1,085	1,109
Non-pension postretirement benefit obligations	515	507
Mark-to-market derivative liabilities	113	83
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Common stock (in dollars)	$ 0	$ 0
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares outstanding (in shares)	995	994
Shareholders’ equity
Common stock	$ 20,956	$ 20,908
Treasury stock, common (in shares)	2	2
Treasury stock, at cost	$ (123)	$ (123)
Accumulated other comprehensive loss, net	(596)	(638)
Retained earnings	5,233	4,597
Total shareholders’ equity	25,470	24,744
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Long-term debt to financing trusts	390	390
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
Delmarva Power and Light Company
Current assets
Cash and cash equivalents	5	31
Restricted cash and cash equivalents	1	121
Accounts receivable
Customer accounts receivable	179	204
Customer allowance for credit losses	(23)	(21)
Customer accounts receivable, net	156	183
Other accounts receivable	59	52
Other allowance for credit losses	(9)	(7)
Other accounts receivable, net	50	45
Inventories, net
Fossil fuel	9	18
Materials and supplies	65	58
Prepaid utility taxes	30	23
Regulatory assets	55	80
Other	9	14
Total current assets	390	573
Property, plant and equipment, net	5,079	4,820
Deferred debits and other assets
Regulatory assets	210	202
Prepaid pension asset	140	153
Total deferred debits and other assets	401	409
Total assets	5,870	5,802
Current liabilities
Short-term borrowings	0	115
Long-term debt due within one year	584	584
Accrued expenses	63	41
Customer deposits	31	29
Regulatory liabilities	55	44
Total current liabilities	940	1,143
Long-term debt	1,476	1,354
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	896	869
Regulatory liabilities	368	380
Asset retirement obligations	12	13
Non-pension postretirement benefit obligations	9	9
Other	89	84
Total deferred credits and other liabilities	1,374	1,355
Total liabilities	3,790	3,852
Commitments and contingencies
Shareholders’ equity
Common stock	1,455	1,356
Retained earnings	625	594
Total shareholders’ equity	2,080	1,950
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	5,870	5,802
Delmarva Power and Light Company \| Related Party
Accounts receivable
Receivables from affiliates	0	0
Receivable from Exelon/PHI intercompany money pool	10	0
Current liabilities
Accounts payable	25	22
Delmarva Power and Light Company \| Nonrelated Party
Deferred debits and other assets
Other	51	54
Current liabilities
Accounts payable	161	172
Other	$ 21	$ 136

Balance Sheets - DPL (Parenthet

Balance Sheets - DPL (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ 16,836	$ 15,930
Delmarva Power and Light Company
Accumulated depreciation and amortization	$ 1,893	$ 1,772

Consolidated Balance Sheets (_5

Consolidated Balance Sheets (Unaudited) - ACE - USD ($) shares in Millions, $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 300	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,575	2,544
Customer allowance for credit losses	(341)	(327)
Customer accounts receivable, net	2,234	2,217
Other accounts receivable	1,168	1,426
Other allowance for credit losses	(88)	(82)
Other accounts receivable, net	1,080	1,344
Inventories, net
Fossil fuel	105	208
Materials and supplies	657	547
Regulatory assets	2,307	1,641
Other	401	406
Total current assets	7,519	7,336
Property, plant and equipment, net	72,458	69,076
Deferred debits and other assets
Regulatory assets	8,128	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,923	2,897
Investments	246	232
Other	1,355	1,141
Total deferred debits and other assets	19,282	18,937
Total assets	99,259	95,349
Current liabilities
Short-term borrowings	1,720	2,586
Long-term debt due within one year	1,654	1,802
Accrued expenses	1,315	1,226
Regulatory liabilities	437	437
Mark-to-market derivative liabilities	44	8
Unamortized energy contract liabilities	8	10
Other	933	1,155
Total current liabilities	8,800	10,611
Long-term debt	39,431	35,272
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,792	11,250
Regulatory liabilities	9,236	9,112
Asset retirement obligations	269	269
Pension obligations	1,085	1,109
Non-pension postretirement benefit obligations	515	507
Mark-to-market derivative liabilities	113	83
Unamortized energy contract liabilities	29	35
Other	2,129	1,967
Total deferred credits and other liabilities	25,168	24,332
Total liabilities	73,789	70,605
Commitments and contingencies
Common stock (in dollars)	$ 0	$ 0
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares outstanding (in shares)	995	994
Shareholders’ equity
Common stock	$ 20,956	$ 20,908
Treasury stock, common (in shares)	2	2
Treasury stock, at cost	$ (123)	$ (123)
Accumulated other comprehensive loss, net	(596)	(638)
Retained earnings	5,233	4,597
Total shareholders’ equity	25,470	24,744
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	99,259	95,349
Related Party
Current liabilities
Accounts payable	5	5
Long-term debt to financing trusts	390	390
Nonrelated Party
Current liabilities
Accounts payable	2,684	3,382
Atlantic City Electric Company
Current assets
Cash and cash equivalents	14	72
Restricted cash and cash equivalents	0	0
Accounts receivable
Customer accounts receivable	235	179
Customer allowance for credit losses	(39)	(41)
Customer accounts receivable, net	196	138
Other accounts receivable	84	70
Other allowance for credit losses	(13)	(14)
Other accounts receivable, net	71	56
Inventories, net
Inventories, net	54	43
Prepaid utility taxes	15	0
Regulatory assets	113	130
Other	5	3
Total current assets	471	443
Property, plant and equipment, net	4,155	3,990
Deferred debits and other assets
Regulatory assets	490	494
Prepaid pension asset	7	18
Total deferred debits and other assets	529	546
Total assets	5,155	4,979
Current liabilities
Short-term borrowings	173	0
Long-term debt due within one year	153	3
Accrued expenses	51	47
Customer deposits	23	21
Regulatory liabilities	9	26
PPA termination obligation	61	87
Total current liabilities	673	474
Long-term debt	1,680	1,754
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	766	734
Regulatory liabilities	144	156
Non-pension postretirement benefit obligations	6	8
Other	57	100
Total deferred credits and other liabilities	973	998
Total liabilities	3,326	3,226
Commitments and contingencies
Shareholders’ equity
Common stock	1,830	1,765
Retained earnings	(1)	(12)
Total shareholders’ equity	1,829	1,753
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	5,155	4,979
Atlantic City Electric Company \| Related Party
Accounts receivable
Receivables from affiliates	3	1
Current liabilities
Accounts payable	22	26
Other	17	0
Atlantic City Electric Company \| Nonrelated Party
Deferred debits and other assets
Other	32	34
Current liabilities
Accounts payable	149	206
Other	$ 15	$ 58

Consolidated Balance Sheets - A

Consolidated Balance Sheets - ACE (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ 16,836	$ 15,930
Atlantic City Electric Company
Accumulated depreciation and amortization	$ 1,651	$ 1,551

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders Equity (Unaudited) - Exelon - USD ($) shares in Thousands, $ in Millions	Total	Correcting Adjustment [Member]	Common Stock	Common Stock Correcting Adjustment [Member]	Treasury Stock, Common	Retained Earnings	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Beginning balance (in shares) at Dec. 31, 2021	981,291
Beginning balance at Dec. 31, 2021	$ 34,795		$ 20,324		$ (123)	$ 16,942	$ (2,750)	$ 402
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598					597		1
Long -Term Incentive Plan Activity (shares)	540
Long-Term Incentive Plan Activity		$ (13)		$ (13)
Employee stock purchase plan issuances (shares)	211
Employee stock purchase plan issuances	$ 9		9
Changes in equity of noncontrolling interests	(7)							(7)
Distribution of Constellation	(11,573)		(21)			(13,179)	2,023	(396)
Common stock dividends	(332)					(332)
Other comprehensive income (loss), net of income taxes	$ 14						14
Ending balance (in shares) at Mar. 31, 2022	982,042
Ending balance at Mar. 31, 2022	$ 23,491		20,299		(123)	4,028	(713)	0
Beginning balance (in shares) at Dec. 31, 2021	981,291
Beginning balance at Dec. 31, 2021	$ 34,795		20,324		(123)	16,942	(2,750)	402
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739
Issuance of common stock	563
Other comprehensive income (loss), net of income taxes	$ 35
Ending balance (in shares) at Sep. 30, 2022	995,575
Ending balance at Sep. 30, 2022	$ 24,582		20,895		(123)	4,502	(692)	0
Beginning balance (in shares) at Mar. 31, 2022	982,042
Beginning balance at Mar. 31, 2022	$ 23,491		20,299		(123)	4,028	(713)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 465					465		0
Long -Term Incentive Plan Activity (shares)	21
Long-Term Incentive Plan Activity	$ 10		10
Employee stock purchase plan issuances (shares)		242
Employee stock purchase plan issuances	10		10
Common stock dividends	(332)					(332)
Other comprehensive income (loss), net of income taxes	$ 12						12
Ending balance (in shares) at Jun. 30, 2022	982,305
Ending balance at Jun. 30, 2022	$ 23,656		20,319		(123)	4,161	(701)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 676					676		0
Long -Term Incentive Plan Activity (shares)	0
Long-Term Incentive Plan Activity	$ 3		3
Employee stock purchase plan issuances (shares)	275
Employee stock purchase plan issuances	$ 10		10
Stock Issued During Period, Shares, New Issues	12,995
Issuance of common stock	$ 563		563
Common stock dividends	(335)					(335)
Other comprehensive income (loss), net of income taxes	$ 9						9
Ending balance (in shares) at Sep. 30, 2022	995,575
Ending balance at Sep. 30, 2022	$ 24,582		20,895		(123)	4,502	(692)	0
Beginning balance (in shares) at Dec. 31, 2022	995,830
Beginning balance at Dec. 31, 2022	$ 24,744		20,908		(123)	4,597	(638)	0
Beginning Balance at Dec. 31, 2022	24,744
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 669					669		0
Long -Term Incentive Plan Activity (shares)	306
Long-Term Incentive Plan Activity	$ 1		1
Employee stock purchase plan issuances (shares)	266
Employee stock purchase plan issuances	$ 12		12
Common stock dividends	(359)					(359)
Other comprehensive income (loss), net of income taxes	$ (1)						(1)
Ending balance (in shares) at Mar. 31, 2023	996,402
Ending balance at Mar. 31, 2023	$ 25,066		20,921		(123)	4,907	(639)	0
Beginning balance (in shares) at Dec. 31, 2022	995,830
Beginning balance at Dec. 31, 2022	$ 24,744		20,908		(123)	4,597	(638)	0
Beginning Balance at Dec. 31, 2022	24,744
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711
Issuance of common stock	0
Other comprehensive income (loss), net of income taxes	$ 42
Ending balance (in shares) at Sep. 30, 2023	997,270
Ending balance at Sep. 30, 2023	$ 25,470		20,956		(123)	5,233	(596)	0
Ending Balance at Sep. 30, 2023	$ 25,470
Beginning balance (in shares) at Mar. 31, 2023	996,402
Beginning balance at Mar. 31, 2023	$ 25,066		20,921		(123)	4,907	(639)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 343					343		0
Long -Term Incentive Plan Activity (shares)	372
Long-Term Incentive Plan Activity	$ 9		9
Employee stock purchase plan issuances (shares)	278
Employee stock purchase plan issuances	$ 11		11
Common stock dividends	(359)					(359)
Other comprehensive income (loss), net of income taxes	$ 9						9
Ending balance (in shares) at Jun. 30, 2023	997,052
Ending balance at Jun. 30, 2023	$ 25,079		20,941		(123)	4,891	(630)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 700					700
Long -Term Incentive Plan Activity (shares)	(84)
Long-Term Incentive Plan Activity	$ 3		3
Employee stock purchase plan issuances (shares)	302
Employee stock purchase plan issuances	$ 12		12
Common stock dividends	(358)					(358)
Other comprehensive income (loss), net of income taxes	$ 34						34
Ending balance (in shares) at Sep. 30, 2023	997,270
Ending balance at Sep. 30, 2023	$ 25,470		$ 20,956		$ (123)	$ 5,233	$ (596)	$ 0
Ending Balance at Sep. 30, 2023	$ 25,470

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders Equity - Exelon (Parentheticals) - $ / shares	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Common stock dividends (in dollars per share)	$ 0.36	$ 0.36	$ 0.36	$ 0.34	$ 0.34	$ 0.34

Consolidated Statements of Ch_3

Consolidated Statements of Changes in Shareholders Equity (Unaudited) - ComEd - USD ($) $ in Millions	Total	Retained Earnings	Commonwealth Edison Co	Commonwealth Edison Co Common Stock	Commonwealth Edison Co Other Paid-in-Capital [Member]	Commonwealth Edison Co Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 12,355	$ 1,588	$ 9,076	$ 1,691
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	188			188
Common stock dividends	(332)	(332)	(144)			(144)
Contributions from parent			167		167
Ending Balance at Mar. 31, 2022			12,566	1,588	9,243	1,735
Beginning Balance at Dec. 31, 2021			12,355	1,588	9,076	1,691
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		706
Ending Balance at Sep. 30, 2022			13,130	1,588	9,579	1,963
Beginning Balance at Mar. 31, 2022			12,566	1,588	9,243	1,735
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	227			227
Common stock dividends	(332)	(332)	(145)			(145)
Contributions from parent			168		168
Ending Balance at Jun. 30, 2022			12,816	1,588	9,411	1,817
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	291			291
Common stock dividends	(335)	(335)	(145)			(145)
Contributions from parent			168		168
Ending Balance at Sep. 30, 2022			13,130	1,588	9,579	1,963
Beginning Balance at Dec. 31, 2022	24,744		13,364	1,588	9,746	2,030
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	241			241
Common stock dividends	(359)	(359)	(187)			(187)
Contributions from parent			186		186
Ending Balance at Mar. 31, 2023			13,604	1,588	9,932	2,084
Beginning Balance at Dec. 31, 2022	24,744		13,364	1,588	9,746	2,030
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		822
Ending Balance at Sep. 30, 2023	25,470		14,198	1,588	10,316	2,294
Beginning Balance at Mar. 31, 2023			13,604	1,588	9,932	2,084
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	249			249
Common stock dividends	(359)	(359)	(187)			(187)
Contributions from parent			186		186
Ending Balance at Jun. 30, 2023			13,852	1,588	10,118	2,146
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	333			333
Common stock dividends	(358)	$ (358)	(185)			(185)
Contributions from parent			198		198
Ending Balance at Sep. 30, 2023	$ 25,470		$ 14,198	$ 1,588	$ 10,316	$ 2,294

Consolidated Statements of Ch_4

Consolidated Statements of Changes in Shareholders Equity (Unaudited) - PECO - USD ($) $ in Millions	Total	Retained Earnings	PECO Energy Co	PECO Energy Co Common Stock	PECO Energy Co Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 5,112	$ 3,428	$ 1,684
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	206		206
Common stock dividends	(332)	(332)	(100)		(100)
Contributions from parent			227	227
Ending Balance at Mar. 31, 2022			5,445	3,655	1,790
Beginning Balance at Dec. 31, 2021			5,112	3,428	1,684
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		474
Ending Balance at Sep. 30, 2022			5,561	3,702	1,859
Beginning Balance at Mar. 31, 2022			5,445	3,655	1,790
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	133		133
Common stock dividends	(332)	(332)	(100)		(100)
Ending Balance at Jun. 30, 2022			5,478	3,655	1,823
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	135		135
Common stock dividends	(335)	(335)	(99)		(99)
Contributions from parent			47	47
Ending Balance at Sep. 30, 2022			5,561	3,702	1,859
Beginning Balance at Dec. 31, 2022	24,744		5,563	3,702	1,861
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	166		166
Common stock dividends	(359)	(359)	(101)		(101)
Contributions from parent			330	330
Ending Balance at Mar. 31, 2023			5,958	4,032	1,926
Beginning Balance at Dec. 31, 2022	24,744		5,563	3,702	1,861
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		410
Ending Balance at Sep. 30, 2023	25,470		6,017	4,050	1,967
Beginning Balance at Mar. 31, 2023			5,958	4,032	1,926
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	97		97
Common stock dividends	(359)	(359)	(101)		(101)
Ending Balance at Jun. 30, 2023			5,954	4,032	1,922
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	146		146
Common stock dividends	(358)	$ (358)	(101)		(101)
Contributions from parent			18	18
Ending Balance at Sep. 30, 2023	$ 25,470		$ 6,017	$ 4,050	$ 1,967

Statements of Changes in Shareh

Statements of Changes in Shareholders Equity (Unaudited) - BGE - USD ($) $ in Millions	Total	Retained Earnings	Baltimore Gas and Electric Company	Baltimore Gas and Electric Company Common Stock	Baltimore Gas and Electric Company Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 4,570	$ 2,575	$ 1,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	198		198
Common stock dividends	(332)	(332)	(76)		(76)
Ending Balance at Mar. 31, 2022			4,692	2,575	2,117
Beginning Balance at Dec. 31, 2021			4,570	2,575	1,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		267
Ending Balance at Sep. 30, 2022			4,798	2,761	2,037
Beginning Balance at Mar. 31, 2022			4,692	2,575	2,117
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	37		37
Common stock dividends	(332)	(332)	(75)		(75)
Contributions from parent			186	186
Ending Balance at Jun. 30, 2022			4,840	2,761	2,079
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	33		33
Common stock dividends	(335)	(335)	(75)		(75)
Ending Balance at Sep. 30, 2022			4,798	2,761	2,037
Beginning Balance at Dec. 31, 2022	24,744		4,936	2,861	2,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	200		200
Common stock dividends	(359)	(359)	(80)		(80)
Contributions from parent			237	237
Ending Balance at Mar. 31, 2023			5,293	3,098	2,195
Beginning Balance at Dec. 31, 2022	24,744		4,936	2,861	2,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		286
Ending Balance at Sep. 30, 2023	25,470		5,222	3,098	2,124
Beginning Balance at Mar. 31, 2023			5,293	3,098	2,195
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	42		42
Common stock dividends	(359)	(359)	(79)		(79)
Ending Balance at Jun. 30, 2023			5,256	3,098	2,158
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	45		45
Common stock dividends	(358)	$ (358)	(79)		(79)
Ending Balance at Sep. 30, 2023	$ 25,470		$ 5,222	$ 3,098	$ 2,124

Consolidated Statements of Ch_5

Consolidated Statements of Changes in Member's Equity (Unaudited) - PHI - USD ($) $ in Millions	Total	Undistributed (Losses)/Gains	Pepco Holdings LLC	Pepco Holdings LLC Membership Interest	Pepco Holdings LLC Undistributed (Losses)/Gains
Beginning Balance at Dec. 31, 2021			$ 10,585	$ 10,795	$ (210)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	130		130
Distributions to member			(102)		(102)
Contributions from member			704	704
Ending Balance at Mar. 31, 2022			11,317	11,499	(182)
Beginning Balance at Dec. 31, 2021			10,585	10,795	(210)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		518
Ending Balance at Sep. 30, 2022			11,266	11,582	(316)
Beginning Balance at Mar. 31, 2022			11,317	11,499	(182)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	100		100
Distributions to member			(293)		(293)
Ending Balance at Jun. 30, 2022			11,124	11,499	(375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	289		289
Distributions to member			(230)		(230)
Contributions from member			83	83
Ending Balance at Sep. 30, 2022			11,266	11,582	(316)
Beginning Balance at Dec. 31, 2022			11,230	11,582	(352)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	155		155
Distributions to member			(112)		(112)
Contributions from member			405	405
Ending Balance at Mar. 31, 2023			11,678	11,987	(309)
Beginning Balance at Dec. 31, 2022			11,230	11,582	(352)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		490
Ending Balance at Sep. 30, 2023			11,785	12,057	(272)
Beginning Balance at Mar. 31, 2023			11,678	11,987	(309)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	103		103
Distributions to member			(100)		(100)
Ending Balance at Jun. 30, 2023			11,681	11,987	(306)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 700	$ 700	232		232
Distributions to member			(198)		(198)
Contributions from member			70	70
Ending Balance at Sep. 30, 2023			$ 11,785	$ 12,057	$ (272)

Statements of Changes in Shar_2

Statements of Changes in Shareholders Equity (Unaudited) - Pepco - USD ($) $ in Millions	Total	Retained Earnings	Potomac Electric Power Company	Potomac Electric Power Company Common Stock	Potomac Electric Power Company Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 3,475	$ 2,302	$ 1,173
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	46		46
Common stock dividends	(332)	(332)	(42)		(42)
Contributions from parent			387	387
Ending Balance at Mar. 31, 2022			3,866	2,689	1,177
Beginning Balance at Dec. 31, 2021			3,475	2,302	1,173
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		261
Ending Balance at Sep. 30, 2022			3,801	2,767	1,034
Beginning Balance at Mar. 31, 2022			3,866	2,689	1,177
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	70		70
Common stock dividends	(332)	(332)	(258)		(258)
Ending Balance at Jun. 30, 2022			3,678	2,689	989
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	145		145
Common stock dividends	(335)	(335)	(100)		(100)
Contributions from parent			78	78
Ending Balance at Sep. 30, 2022			3,801	2,767	1,034
Beginning Balance at Dec. 31, 2022	24,744		3,782	2,767	1,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	65		65
Common stock dividends	(359)	(359)	(48)		(48)
Contributions from parent			243	243
Ending Balance at Mar. 31, 2023			4,042	3,010	1,032
Beginning Balance at Dec. 31, 2022	24,744		3,782	2,767	1,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		249
Ending Balance at Sep. 30, 2023	25,470		4,139	3,075	1,064
Beginning Balance at Mar. 31, 2023			4,042	3,010	1,032
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	64		64
Common stock dividends	(359)	(359)	(67)		(67)
Ending Balance at Jun. 30, 2023			4,039	3,010	1,029
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	120		120
Common stock dividends	(358)	$ (358)	(85)		(85)
Contributions from parent			65	65
Ending Balance at Sep. 30, 2023	$ 25,470		$ 4,139	$ 3,075	$ 1,064

Statements of Changes in Shar_3

Statements of Changes in Shareholders Equity (Unaudited) - DPL - USD ($) $ in Millions	Total	Retained Earnings	Delmarva Power and Light Company	Delmarva Power and Light Company Common Stock	Delmarva Power and Light Company Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 1,777	$ 1,209	$ 568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	56		56
Common stock dividends	(332)	(332)	(41)		(41)
Contributions from parent			144	144
Ending Balance at Mar. 31, 2022			1,936	1,353	583
Beginning Balance at Dec. 31, 2021			1,777	1,209	568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		130
Ending Balance at Sep. 30, 2022			1,958	1,356	602
Beginning Balance at Mar. 31, 2022			1,936	1,353	583
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	21		21
Common stock dividends	(332)	(332)	(15)		(15)
Ending Balance at Jun. 30, 2022			1,942	1,353	589
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	52		52
Common stock dividends	(335)	(335)	(39)		(39)
Contributions from parent			3	3
Ending Balance at Sep. 30, 2022			1,958	1,356	602
Beginning Balance at Dec. 31, 2022	24,744		1,950	1,356	594
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	60		60
Common stock dividends	(359)	(359)	(42)		(42)
Contributions from parent			99	99
Ending Balance at Mar. 31, 2023			2,067	1,455	612
Beginning Balance at Dec. 31, 2022	24,744		1,950	1,356	594
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		128
Ending Balance at Sep. 30, 2023	25,470		2,080	1,455	625
Beginning Balance at Mar. 31, 2023			2,067	1,455	612
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	25		25
Common stock dividends	(359)	(359)	(18)		(18)
Ending Balance at Jun. 30, 2023			2,074	1,455	619
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	43		43
Common stock dividends	(358)	$ (358)	(37)		(37)
Ending Balance at Sep. 30, 2023	$ 25,470		$ 2,080	$ 1,455	$ 625

Consolidated Statements of Ch_6

Consolidated Statements of Changes in Shareholders Equity (Unaudited) - ACE - USD ($) $ in Millions	Total	Retained Earnings	Atlantic City Electric Company	Atlantic City Electric Company Common Stock	Atlantic City Electric Company Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 1,575	$ 1,590	$ (15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	26		26
Common stock dividends	(332)	(332)	(19)		(19)
Contributions from parent			173	173
Ending Balance at Mar. 31, 2022			1,755	1,763	(8)
Beginning Balance at Dec. 31, 2021			1,575	1,590	(15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		131
Ending Balance at Sep. 30, 2022			1,753	1,765	(12)
Beginning Balance at Mar. 31, 2022			1,755	1,763	(8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	11		11
Common stock dividends	(332)	(332)	(19)		(19)
Ending Balance at Jun. 30, 2022			1,747	1,763	(16)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	94		94
Common stock dividends	(335)	(335)	(90)		(90)
Contributions from parent			2	2
Ending Balance at Sep. 30, 2022			1,753	1,765	(12)
Beginning Balance at Dec. 31, 2022	24,744		1,753	1,765	(12)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	33		33
Common stock dividends	(359)	(359)	(21)		(21)
Contributions from parent			63	63
Ending Balance at Mar. 31, 2023			1,828	1,828	0
Beginning Balance at Dec. 31, 2022	24,744		1,753	1,765	(12)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		122
Ending Balance at Sep. 30, 2023	25,470		1,829	1,830	(1)
Beginning Balance at Mar. 31, 2023			1,828	1,828	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	18		18
Common stock dividends	(359)	(359)	(15)		(15)
Ending Balance at Jun. 30, 2023			1,831	1,828	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	71		71
Common stock dividends	(358)	$ (358)	(75)		(75)
Contributions from parent			2	2
Ending Balance at Sep. 30, 2023	$ 25,470		$ 1,829	$ 1,830	$ (1)

Significant Accounting Policies

Significant Accounting Policies (All Registrants)	9 Months Ended
Significant Accounting Policies (All Registrants)	Sep. 30, 2023
Accounting Policies [Abstract]
Significant Accounting Policies (All Registrants)	Significant Accounting Policies (All Registrants) Description of Business Exelon is a utility services holding company engaged in the energy transmission and distribution businesses through ComEd, PECO, BGE, Pepco, DPL, and ACE. On February 21, 2021, Exelon's Board of Directors approved a plan to separate the Utility Registrants and Generation. The separation was completed on February 1, 2022, creating two publicly traded companies, Exelon and Constellation. See Note 2 — Discontinued Operations for additional information. Name of Registrant Business Service Territories Commonwealth Edison Company Purchase and regulated retail sale of electricity Northern Illinois, including the City of Chicago Transmission and distribution of electricity to retail customers PECO Energy Company Purchase and regulated retail sale of electricity and natural gas Southeastern Pennsylvania, including the City of Philadelphia (electricity) Transmission and distribution of electricity and distribution of natural gas to retail customers Pennsylvania counties surrounding the City of Philadelphia (natural gas) Baltimore Gas and Electric Company Purchase and regulated retail sale of electricity and natural gas Central Maryland, including the City of Baltimore (electricity and natural gas) Transmission and distribution of electricity and distribution of natural gas to retail customers Pepco Holdings LLC Utility services holding company engaged, through its reportable segments Pepco, DPL, and ACE Service Territories of Pepco, DPL, and ACE Potomac Electric Purchase and regulated retail sale of electricity District of Columbia, and major portions of Montgomery and Prince George’s Counties, Maryland Transmission and distribution of electricity to retail customers Delmarva Power & Purchase and regulated retail sale of electricity and natural gas Portions of Delaware and Maryland (electricity) Transmission and distribution of electricity and distribution of natural gas to retail customers Portions of New Castle County, Delaware (natural gas) Atlantic City Electric Company Purchase and regulated retail sale of electricity Portions of Southern New Jersey Transmission and distribution of electricity to retail customers Basis of Presentation This is a combined quarterly report of all Registrants. The Notes to the Consolidated Financial Statements apply to the Registrants as indicated parenthetically next to each corresponding disclosure. When appropriate, the Registrants are named specifically for their related activities and disclosures. Each of the Registrant’s Consolidated Financial Statements includes the accounts of its subsidiaries. All intercompany transactions have been eliminated, except for the historical transactions between the Utility Registrants and Generation for the purposes of presenting discontinued operations in all periods presented in the Consolidated Statements of Operations and Comprehensive Income. Through its business services subsidiary, BSC, Exelon provides its subsidiaries with a variety of support services at cost, including legal, human resources, financial, information technology, and supply management services. PHI also has a business services subsidiary, PHISCO, which provides a variety of support services at cost, including legal, finance, engineering, customer operations, distribution and transmission planning, asset management, system operations, and power procurement, to PHI operating companies. The costs of BSC and PHISCO are directly charged or allocated to the applicable subsidiaries. The results of Exelon’s corporate operations are presented as “Other” in the consolidated financial statements and include intercompany eliminations unless otherwise disclosed. The accompanying consolidated financial statements as of September 30, 2023 and for the three and nine months ended September 30, 2023 and 2022 are unaudited but, in the opinion of each Registrant's management, the Registrants include all adjustments that are considered necessary for a fair statement of the Registrants’ respective financial statements in accordance with GAAP. All adjustments are of a normal, recurring nature, except as otherwise disclosed. The December 31, 2022 Consolidated Balance Sheets were derived from audited financial statements. The interim financial statements are to be read in conjunction with prior annual financial statements and notes. Additionally, financial results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the fiscal year ending December 31, 2023. These Combined Notes to Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the SEC for Quarterly Reports on Form 10-Q. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The separation of Constellation, including Generation and its subsidiaries, met the criteria for discontinued operations and as such, results of operations are presented as discontinued operations and have been excluded from continuing operations for all periods presented. Accounting rules require that certain BSC costs previously allocated to Generation be presented as part of Exelon’s continuing operations as these costs do not qualify as expenses of the discontinued operations. Comprehensive income, shareholders' equity, and cash flows related to Constellation have not been segregated and are included in the Consolidated Statements of Operations and Comprehensive Income, Consolidated Statements of Changes in Shareholders’ Equity, and Consolidated Statements of Cash Flows, respectively, for the nine months ended September 30, 2022. See Note 2 — Discontinued Operations for additional information.

Discontinued Operations (Exelon

Discontinued Operations (Exelon)	9 Months Ended
Discontinued Operations (Exelon)	Sep. 30, 2023
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations (Exelon)	Discontinued Operations (Exelon) On February 21, 2021, Exelon's Board of Directors approved a plan to separate the Utility Registrants and Generation, creating two publicly traded companies ("the separation"). Exelon completed the separation on February 1, 2022. Constellation was newly formed and incorporated in Pennsylvania on June 15, 2021 for the purposes of separation and holds Generation (including Generation's subsidiaries). Pursuant to the separation, Exelon contributed its equity ownership interest in Generation to Constellation. Exelon no longer retains any equity ownership interest in Generation or Constellation. See Note 2 — Discontinued Operations of the 2022 Form 10-K for additional information. Continuing Involvement In order to govern the ongoing relationships between Exelon and Constellation after the separation, and to facilitate an orderly transition, Exelon and Constellation have entered into several agreements, including the following: • Separation Agreement – governs the rights and obligations between Exelon and Constellation regarding certain actions to be taken in connection with the separation, among others, including the allocation of assets and liabilities between Exelon and Constellation. • Transition Services Agreement (TSA) – governs the terms and conditions of the services that Exelon provides to Constellation and Constellation provides to Exelon for an expected period of two years, provided that certain services may be longer than the term and services may be extended with approval from both parties. The services include specified accounting, finance, information technology, human resources, employee benefits and other services that have historically been provided on a centralized basis by BSC. For the three and nine months ended September 30, 2023, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $33 million and $127 million recorded in Other income, net and $4 million and $13 million recorded in Operating and maintenance expense, respectively. For the three months ended September 30, 2022, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $68 million recorded in Other income, net and $12 million recorded in Operating and maintenance expense, respectively. Additionally, for the period from February 1, 2022 to September 30, 2022, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $193 million recorded in Other income, net and $32 million recorded in Operating and maintenance expense, respectively. • Tax Matters Agreement (TMA) – governs the respective rights, responsibilities and obligations of Exelon and Constellation with respect to all tax matters, including tax liabilities and benefits, tax attributes, tax returns, tax contests and other tax sharing regarding U.S. federal, state, local and foreign income taxes, other tax matters and related tax returns. See Note 7 — Income Taxes for additional information. In addition, the Utility Registrants will continue to incur expenses from transactions with Constellation after the separation. Prior to the separation, such expenses were primarily recorded as Purchased power from affiliates and an immaterial amount recorded as Operating and maintenance expense from affiliates at the Utility Registrants. After the separation, such expenses are primarily recorded as Purchased power and an immaterial amount recorded as Operating and maintenance expense at the Utility Registrants. • ComEd had an ICC-approved RFP contract with Constellation to provide a portion of ComEd’s electric supply requirements. ComEd also purchased RECs and ZECs from Constellation. • PECO received electric supply from Constellation under contracts executed through PECO’s competitive procurement process. In addition, PECO had a ten-year agreement with Constellation to sell solar AECs. • BGE received a portion of its energy requirements from Constellation under its MDPSC-approved market-based SOS and gas commodity programs. • Pepco received electric supply from Constellation under contracts executed through Pepco’s competitive procurement process approved by the MDPSC and DCPSC. • DPL received a portion of its energy requirements from Constellation under its MDPSC and DEPSC approved market-based SOS commodity programs. • ACE received electric supply from Constellation under contracts executed through ACE’s competitive procurement process approved by the NJBPU. ComEd and PECO also have receivables with Constellation for estimated excess funds at the end of decommissioning the Regulatory Agreement Units, such amounts are due back to ComEd and PECO, as applicable, for payment to their respective customers. See Note 3 — Regulatory Matters and Note 23 — Related Party Transactions of the 2022 Form 10-K for additional information. Discontinued Operations The separation represented a strategic shift that would have a major effect on Exelon’s operations and financial results. Accordingly, the separation meets the criteria for discontinued operations. There were no results from discontinued operations for the three and nine months ended September 30, 2023 and the three months ended September 30, 2022. The following table presents the results of Constellation that have been reclassified from continuing operations and included in discontinued operations within Exelon’s Consolidated Statements of Operations and Comprehensive Income for the nine months ended September 30, 2022. These results are primarily Generation, which is comprised of Exelon’s Mid-Atlantic, Midwest, New York, ERCOT, and Other Power Regions reportable segments, and include the impact of transaction costs, certain BSC costs, including any transition costs, that were historically allocated and directly attributable to Generation, transactions between Generation and the Utility Registrants, and tax-related adjustments. Transaction costs include costs for external bankers, accountants, appraisers, lawyers, external counsels and other advisors, among others, who are involved in the negotiation, appraisal, due diligence and regulatory approval of the separation. Transition costs are primarily employee-related costs such as recruitment expenses, costs to establish certain stand-alone functions and information technology systems, professional services fees and other separation-related costs during the transition to separate Generation. For the purposes of reporting discontinued operations, these results also include transactions between Generation and the Utility Registrants that were historically eliminated within Exelon’s Consolidated Statements of Operations as these transactions will be ongoing after the separation. Certain BSC costs that were historically allocated to Generation are presented as part of continuing operations in Exelon’s Consolidated Statements of Operations as these costs do not qualify as expenses of the discontinued operations per the accounting rules. Nine Months Ended 2022 Operating revenues Competitive business revenues $ 1,855 Competitive business revenues from affiliates 161 Total operating revenues 2,016 Operating expenses Competitive businesses purchased power and fuel 1,138 Operating and maintenance (a) 371 Depreciation and amortization 94 Taxes other than income taxes 44 Total operating expenses 1,647 Gain on sales of assets and businesses 10 Operating income 379 Other income and (deductions) Interest expense, net (20) Other, net (281) Total other income and (deductions) (301) Income before income taxes 78 Income taxes (40) Equity in losses of unconsolidated affiliates (1) Net income 117 Net income attributable to noncontrolling interests 1 Net income from discontinued operations $ 116 __________ (a) Includes transaction and transition costs related to the separation of $52 million for the nine months ended September 30, 2022. There were no assets or liabilities of discontinued operations included in Exelon's Consolidated Balance Sheet as of September 30, 2023 and December 31, 2022. Constellation had net assets of $11,573 million that separated on February 1, 2022 that resulted in a reduction to Exelon's equity during the year ended December 31, 2022. Refer to the Distribution of Constellation line in Exelon's Consolidated Statement of Changes in Shareholders' Equity for further information. There were no discontinued operations included within Exelon’s Consolidated Statements of Cash Flows for the nine months ended September 30, 2023. The following table presents selected financial information regarding cash flows of the discontinued operations that are included within Exelon’s Consolidated Statements of Cash Flows for the nine months ended September 30, 2022. Nine Months Ended 2022 Non-cash items included in net income from discontinued operations: Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization $ 207 Loss on sales of assets and businesses 9 Deferred income taxes and amortization of investment tax credits (143) Net fair value changes related to derivatives (59) Net realized and unrealized losses on NDT fund investments 205 Net unrealized losses on equity investments 16 Other decommissioning-related activity 36 Cash flows from investing activities: Capital expenditures (227) Collection of DPP 169 Supplemental cash flow information: Decrease in capital expenditures not paid (128) Increase in DPP 348 Increase in PP&E related to ARO update 335

Regulatory Matters (All Registr

Regulatory Matters (All Registrants)	9 Months Ended
Regulatory Matters (All Registrants)	Sep. 30, 2023
Regulated Operations [Abstract]
Regulatory Matters (All Registrants)	Regulatory Matters (All Registrants) As discussed in Note 3 — Regulatory Matters of the 2022 Form 10-K, the Registrants are involved in rate and regulatory proceedings at FERC and their state commissions. The following discusses developments in 2023 and updates to the 2022 Form 10-K. Distribution Base Rate Case Proceedings The following tables show the completed and pending distribution base rate case proceedings in 2023. Completed Distribution Base Rate Case Proceedings Registrant/Jurisdiction Filing Date Service Requested Revenue Requirement Increase Approved Revenue Requirement Increase Approved ROE Approval Date Rate Effective Date ComEd - Illinois (a) April 15, 2022 Electric $ 199 $ 199 7.85 % November 17, 2022 January 1, 2023 PECO - Pennsylvania March 31, 2022 Natural Gas 82 55 N/A (b) October 27, 2022 January 1, 2023 BGE - Maryland (c) May 15, 2020 (amended September 11, 2020) Electric 203 140 9.50 % December 16, 2020 January 1, 2021 Natural Gas 108 74 9.65 % Pepco - Maryland (d) October 26, 2020 (amended March 31, 2021) Electric 104 52 9.55 % June 28, 2021 June 28, 2021 DPL - Maryland (e) May 19, 2022 Electric 38 29 9.60 % December 14, 2022 January 1, 2023 __________ (a) ComEd's 2023 approved revenue requirement above reflects an increase of $144 million for the initial year revenue requirement for 2023 and an increase of $55 million related to the annual reconciliation for 2021. The revenue requirement for 2023 provides for a weighted average debt and equity return on distribution rate base of 5.94%, inclusive of an allowed ROE of 7.85%, reflecting the monthly average yields for 30-year treasury bonds plus 580 basis points. The reconciliation revenue requirement for 2021 provides for a weighted average debt and equity return on distribution rate base of 5.91%, inclusive of an allowed ROE of 7.78%, reflecting the monthly yields on 30-year treasury bonds plus 580 basis points less a performance metrics penalty of 7 basis points. This is ComEd's last performance-based electric distribution formula rate established under EIMA. See discussion of CEJA below for details on the transition away from the electric distribution formula rate. (b) The PECO natural gas base rate case proceeding was resolved through a settlement agreement, which did not specify an approved ROE. (c) Reflects a three-year cumulative multi-year plan for 2021 through 2023. BGE proposed to use certain tax benefits to fully offset the increases in 2021 and 2022 and partially offset the increase in 2023. The MDPSC awarded BGE electric revenue requirement increases of $59 million, $39 million, and $42 million, before offsets, in 2021, 2022, and 2023, respectively, and natural gas revenue requirement increases of $53 million, $11 million, and $10 million, before offsets, in 2021, 2022, and 2023, respectively. However, the MDPSC utilized the tax benefits to fully offset the increases in 2021 and January 2022 such that customer rates remained unchanged. For the remainder of 2022, the MDPSC chose to offset only 25% of the cumulative 2021 and 2022 electric revenue requirement increases and 50% of the cumulative gas revenue requirement increases. In 2021, the MDPSC deferred a decision on whether to use certain tax benefits to offset the revenue requirement increases in 2023 and directed BGE to make another proposal at the end of 2022. In September 2022, BGE proposed that tax benefits not be used to offset the 2023 revenue requirement increases. On October 26, 2022, the MDPSC accepted BGE's recommendation to not use tax benefits to offset the 2023 revenue requirement increases. (d) Reflects a three-year cumulative multi-year plan for April 1, 2021 through March 31, 2024. The MDPSC awarded Pepco electric incremental revenue requirement increases of $21 million, $16 million, and $15 million, before offsets, for the 12-month periods ending March 31, 2022, 2023, and 2024, respectively. Pepco proposed to utilize certain tax benefits to fully offset the increase through 2023 and partially offset customer rate increases in 2024. However, the MDPSC only utilized the acceleration of refunds for certain tax benefits to fully offset the increases such that customer rates remain unchanged through March 31, 2022. On February 23, 2022, the MDPSC chose to offset 25% of the cumulative revenue requirement increase for the 12-month period ending March 31, 2023. In 2021, the MDPSC deferred a decision on whether to use certain tax benefits to offset the revenue requirement increases for the 12-month period ending March 31, 2024. In December 2022 Pepco proposed that tax benefits not be used to offset the revenue requirement increases for this period. On January 25, 2023, the MDPSC accepted Pepco’s recommendations not to use tax benefits to offset revenue requirement increases for the 12-month period ending March 31, 2024. (e) Reflects a three-year cumulative multi-year plan for January 1, 2023 through December 31, 2025. The MDPSC awarded DPL electric incremental revenue requirement increases of $17 million, $6 million, and $6 million for 2023, 2024, and 2025, respectively. Pending Distribution Base Rate Case Proceedings Registrant/Jurisdiction Filing Date Service Requested Revenue Requirement Increase Requested ROE Expected Approval Timing ComEd - Illinois (a) January 17, 2023 Electric $ 1,487 10.50% to 10.65% Fourth quarter of 2023 ComEd - Illinois (b) April 21, 2023 Electric 247 8.91% Fourth quarter of 2023 BGE - Maryland (c) February 17, 2023 Electric 313 10.40% Fourth quarter of 2023 Natural Gas 289 10.40% Pepco - District of Columbia (d) April 13, 2023 Electric 191 10.50% Second quarter of 2024 Pepco - Maryland (e) May 16, 2023 Electric 214 10.50% Second quarter of 2024 DPL - Delaware (f) December 15, 2022 (amended September 29, 2023) Electric 39 10.50% Second quarter of 2024 ACE - New Jersey (g) February 15, 2023 (amended August 21, 2023) Electric 92 10.50% Fourth quarter of 2023 __________ (a) On September 27, 2023, ComEd filed its reply brief supporting its proposed multi-year rate and grid plans, as adjusted or modified by ComEd as of the evidentiary hearing on August 22, 2023. The rate plan covers the period from January 1, 2024 to December 31, 2027 and includes total requested revenue requirement increases of $968 million effective January 1, 2024, $181 million effective January 1, 2025, $163 million effective January 1, 2026, and $175 million effective January 1, 2027, based on forecasted revenue requirements. If approved, the revenue requirement will provide for a weighted average debt and equity return on distribution rate base of 7.40% in 2024, 7.47% in 2025, 7.58% in 2026, and 7.65% in 2027, inclusive of an allowed ROE of 10.50% in 2024, 10.55% in 2025, 10.60% in 2026, and 10.65% in 2027. The requested revenue requirements are based on capital structures that reflect between 50.58% and 51.19% common equity. ComEd’s MRP also includes a proposed three-tranche rate phase-in to defer approximately $339 million, of the $968 million year-over-year revenue increase for 2024 from 2024 to 2026, approximately $52 million, of the $520 million year-over-year revenue increase for 2025 from 2025 to 2027, and approximately $75 million of the $215 million year-over-year revenue increase for 2026 from 2026 to 2028. (b) On April 21, 2023, ComEd filed its proposed Delivery Reconciliation Amount of $247 million un der Rider Delivery Service Pricing Reconciliation (Rider DSPR) which allows for the reconciliation of the revenue requirement in effect in the final years in which formula rates are determined and until such time as new rates are established under ComEd’s approved MRP. The 2023 filing reconciles the delivery service rates in effect in 2022 with the actual delivery service costs incurred in 2022. Final order is expected by December 2023, and the reconciliation amount will be in customer rates beginning January 1, 2024. (c) Reflects a three-year cumulative multi-year plan for January 1, 2024 through December 31, 2026 submitted to the MDPSC. Inclusive of the proposed acceleration of remaining electric tax benefits in 2024 and 2025, and remaining gas tax benefits in 2024, BGE requested total electric revenue requirement increases of $85 million, $103 million, and $125 million in 2024, 2025, and 2026, respectively, and natural gas revenue requirement increases of $158 million, $77 million, and $54 million in 2024, 2025, and 2026, respectively. Requested revenue requirement increases will be used to recover capital investments designed to increase the resilience of the electric and gas distribution systems and support Maryland’s climate and regulatory initiatives. The 2021 and 2022 reconciliation amounts are not included in the requested revenue requirement increase, as BGE is proposing that these amounts be recovered through the separate electric and gas riders in 2024. The 2021 reconciliation amounts are $11 million and $7 million for electric and gas, respectively, and the 2022 reconciliation amounts are $44 million and $15 million for electric and gas, respectively. The requested electric revenue requirement includes approximately $25 million for a Customer Electrification Plan that the MDPSC struck from BGE's case in August 2023. (d) Reflects a three-year cumulative multi-year plan for January 1, 2024 through December 31, 2026 submitted to the DCPSC. Pepco requested total electric revenue requirement increases of $117 million, $37 million, and $37 million in 2024, 2025, and 2026, respectively. Requested revenue requirement increases will be used to recover capital investments designed to advance system-readiness and support the District of Columbia’s climate and clean energy goals. (e) Reflects a three-year cumulative multi-year plan for April 1, 2024 through March 31, 2027 submitted to the MDPSC. Pepco requested total electric revenue requirement increases of $74 million, $60 million and $60 million effective April 1, 2024, April 1, 2025, and April 1, 2026, respectively. The plan contains a proposed nine-month extension period with a requested revenue requirement increase of $20 million effective April 1, 2027 through December 31, 2027. Requested revenue requirement increases will be used to recover capital investments designed to advance system-readiness and support Maryland's climate and clean energy goals. On August 7, 2023, the MDPSC issued an order approving a settlement agreement which allows Pepco to establish a revenue deferral mechanism to recover its full Commission-authorized year 1 increase between July 1, 2024 through March 31, 2025 and extend the procedural schedule to address intervenor resource constraints. (f) The rates went into effect on July 15, 2023, subject to refund. (g) Requested increases are before New Jersey sales and use tax. ACE’s procedural schedule was suspended on September 6, 2023. On October 21, 2023, ACE filed a stipulation of settlement with the NJBPU. Subsequently, on October 24, 2023, the administrative law judge presiding over the case recommended the settlement with all parties be approved. ACE is awaiting final approval of the settlement from the NJBPU and it is expected during the fourth quarter of 2023. Transmission Formula Rates The Utility Registrants' transmission rates are each established based on a FERC-approved formula. ComEd, BGE, Pepco, DPL, and ACE are required to file an annual update to the FERC-approved formula on or before May 15, and PECO is required to file on or before May 31, with the resulting rates effective on June 1 of the same year. The annual update for ComEd is based on prior year actual costs and current year projected capital additions (initial year revenue requirement). The update for ComEd also reconciles any differences between the revenue requirement in effect beginning June 1 of the prior year and actual costs incurred for that year (annual reconciliation). The annual update for PECO is based on prior year actual costs and current year projected capital additions, accumulated depreciation, and accumulated deferred income taxes. The annual update for BGE, Pepco, DPL, and ACE is based on prior year actual costs and current year projected capital additions, accumulated depreciation, depreciation and amortization expense, and accumulated deferred income taxes. The update for PECO, BGE, Pepco, DPL, and ACE also reconciles any differences between the actual costs and actual revenues for the calendar year (annual reconciliation). For 2023, the following increases/(decreases) were included in the Utility Registrants' electric transmission formula rate updates: Registrant (a) Initial Revenue Requirement Increase Annual Reconciliation Increase (Decrease) Total Revenue Requirement Increase Allowed Return on Rate Base (b) Allowed ROE (c) ComEd $ 20 $ 63 $ 83 8.09 % 11.50 % PECO 24 23 47 7.41 % 10.35 % BGE 19 (12) 4 (d) 7.34 % 10.50 % Pepco 37 (5) 32 7.57 % 10.50 % DPL 32 (3) 29 7.08 % 10.50 % ACE 41 (12) 29 7.08 % 10.50 % __________ (a) All rates are effective June 1, 2023 - May 31, 2024, subject to review by interested parties pursuant to review protocols of each Utility Registrants' tariffs. (b) Represents the weighted average debt and equity return on transmission rate bases. For ComEd and PECO, the common equity component of the ratio used to calculate the weighted average debt and equity return on the transmission formula rate base is currently capped at 55% and 55.75%, respectively. (c) The rate of return on common equity for each Utility Registrant includes a 50-basis-point incentive adder for being a member of a RTO. (d) The increase in BGE's transmission revenue requirement includes a $3 million reduction related to a FERC-approved dedicated facilities charge to recover the costs of providing transmission service to specifically designated load by BGE. Other State Regulatory Matters Illinois Regulatory Matters CEJA (Exelon and ComEd). On September 15, 2021, the Governor of Illinois signed into law CEJA. CEJA includes, among other features, (1) procurement of CMCs from qualifying nuclear-powered generating facilities, (2) a requirement to file a general rate case or a new four-year MRP no later than January 20, 2023 to establish rates effective after ComEd’s existing performance-based distribution formula rate sunsets, (3) an extension of and certain adjustments to ComEd’s energy efficiency MWh savings goals, (4) revisions to the Illinois RPS requirements, including expanded charges for the procurement of RECs from wind and solar generation, (5) a requirement to accelerate amortization of ComEd’s unprotected excess deferred income taxes (EDIT) that ComEd was previously directed by the ICC to amortize using the average rate assumption method which equates to approximately 39.5 years, and (6) requirements that ComEd and the ICC initiate and conduct various regulatory proceedings on subjects including ethics, spending, grid investments, and performance metrics. Regulatory or legal challenges regarding the validity or implementation of CEJA are possible and Exelon and ComEd cannot reasonably predict the outcome of any such challenges. ComEd Electric Distribution Rates ComEd filed, and received approval for, its last performance-based electric distribution formula rate update filing under EIMA in 2022; those rates are in effect throughout 2023. On February 3, 2022, the ICC approved a tariff that establishes the process under which ComEd will reconcile its 2022 and 2023 rate year revenue requirements with actual costs. Those reconciliation amounts will be determined using the same process as were used for prior reconciliations under the performance-based electric distribution formula rate. Using that process, for the rate years 2022 and 2023 ComEd will ultimately collect revenues from customers reflecting each year’s actual recoverable costs, year-end rate base, and a weighted average debt and equity return on distribution rate base, with the ROE component based on the annual average of the monthly yields of the 30-year U.S. Treasury bonds plus 580 basis points. In April 2023, ComEd filed its first petition with the ICC to reconcile its 2022 actual costs with the approved revenue requirement that was in effect in 2022; the final order is expected by December 2023, for rates beginning January 2024. The rate year 2023 reconciliation will be filed in 2024. Beginning in 2024, ComEd will recover from retail customers, subject to certain exceptions, the costs it incurs to provide electric delivery services either through its electric distribution rate or other recovery mechanisms authorized by CEJA. On January 17, 2023, ComEd filed a petition with the ICC seeking approval of a MRP for 2024-2027. The MRP supports a multi-year grid plan (Grid Plan), also filed on January 17, covering planned investments on the electric distribution system within ComEd’s service area through 2027. Costs incurred during each year of the MRP are subject to ICC review and the plan’s revenue requirement for each year will be reconciled with the actual costs that the ICC determines are prudently and reasonably incurred for that year. The reconciliation is subject to adjustment for certain costs, including a limitation on recovery of costs that are more than 105% of certain costs in the previously approved MRP revenue requirement, absent a modification of the rate plan itself. Thus, for example, the rate adjustments necessary to reconcile 2024 revenues to ComEd’s actual 2024 costs incurred would take effect in January 2026 after the ICC’s review during 2025. On May 22, 2023, direct testimony was filed by ICC staff and more than a dozen intervenors and intervenor groups. The testimonies addressed a wide variety of topics, including rate of return on equity, capital structure, grid planning, various distribution grid and information technology investments, and affordability and customer service. ComEd filed rebuttal testimony in June, which provided, among other things, defense of ComEd’s planned 2024-2027 capital investment and proposed cost of equity. ComEd also made voluntary adjustments and, per the ICC’s final beneficial electrification order requiring ComEd to recover beneficial electrification costs through the MRP, increased its total revenue requirement request from $1.472 billion to $1.545 billion. On July 27, 2023, ICC staff and intervenors filed rebuttal testimony, which showed little to no movement on the key issues, including ROE and large capital projects. On August 14, 2023, ComEd filed surrebuttal testimony. On August 22, 2023, evidentiary hearings were held, during which testimony and other evidence was admitted and the evidentiary phase of the hearing process was closed. ComEd filed its reply brief on September 27, 2023, to adjust its total requested revenue requirement increase to $1.487 billion. On October 23, 2023 the administrative law judges (ALJs) issued a proposed order in ComEd's MRP proceeding recommending a $317 million reduction to ComEd's requested revenue requirement increase of $1.487 billion. Significant differences between the ALJ’s proposed order and ComEd’s final position relate to the proposed return on equity and the disallowance of any return on ComEd’s pension asset. The ALJs proposed order is not final, and briefs on exception will be filed in November 2023. The Commission may also hear oral arguments prior to making its final decision. The ICC must issue its decision on both the MRP and Grid Plan by mid-December 2023, for rates to begin with the January 2024 billing cycle. In January 2022, ComEd filed a request with the ICC proposing performance metrics that would be used in determining ROE incentives and penalties in the event ComEd filed a MRP in January 2023. On September 27, 2022, the ICC issued a final order approving seven performance metrics that provide symmetrical performance adjustments of 32 total basis points to ComEd’s rate of return on common equity based on the extent to which ComEd achieves the annual performance goals. On November 10, 2022, the ICC granted ComEd's application for rehearing, in part. On April 5, 2023, the ICC issued its final order on rehearing for the performance and tracking metrics proceeding, in which the ICC declined to adopt ComEd’s proposed modifications to the reliability and peak load reduction performance metrics. Efforts are underway to implement the performance metrics, which take effect on January 1, 2024. ComEd will make its initial filing in 2025 to assess performance achieved under the metrics in 2024, and to determine any ROE adjustment, which would take effect in 2026. Carbon Mitigation Credit CEJA establishes decarbonization requirements for Illinois as well as programs to support the retention and development of emissions-free sources of electricity. ComEd is required to purchase CMCs from participating nuclear-powered generating facilities between June 1, 2022 and May 31, 2027. The price to be paid for each CMC was established through a competitive bidding process that included consumer-protection measures that capped the maximum acceptable bid amount and a formula that reduces CMC prices by an energy price index, the base residual auction capacity price in the ComEd zone of PJM, and the monetized value of any federal tax credit or other subsidy if applicable. The consumer protection measures contained in CEJA will result in net payments to ComEd ratepayers if the energy index, the capacity price and applicable federal tax credits or subsidy exceed the CMC contract price. In the June 2022 billing period, ComEd began issuing credits to its retail customers under its new CMC rider. A regulatory asset is recorded for the difference between customer credits issued and the credit to be received from the participating nuclear-powered generating facilities. The balance as of September 30, 2023 is $862 million. Under CEJA, the costs of procuring CMCs, including carrying costs, are recovered through a rider, the Rider Carbon-Free Resource Adjustment (Rider CFRA). As originally approved by the ICC, Rider CFRA provides for an annual reconciliation and true-up to actual costs incurred or credits received by ComEd to purchase CMCs, with any difference to be credited to or collected from ComEd’s retail customers in subsequent periods. The difference between the net payments to (or receivables from) ComEd ratepayers and the credits received by ComEd to purchase CMCs is recorded to Purchased Power expense with an offset to the regulatory asset (or regulatory liability). On December 21, 2022, ComEd filed an amendment to Rider CFRA proposing that it recover costs or provide credits faster than the tariff allows, implement monthly reconciliations, and allow ComEd to adjust Rider CFRA rates based not only on anticipated differences but also past payments or credits, and implement monthly reconciliations beginning the June 2023 delivery period. The ICC approved the proposal on January 19, 2023. In addition, on March 24, 2023, ComEd submitted revisions to Rider CFRA which clarified the methodology for calculating interest to be included in the annual reconciliation associated with the June 2022 through May 2023 delivery year. The ICC approved the proposal on April 20, 2023. Beneficial Electrification Plan On March 23, 2023, the ICC issued its final order approving the beneficial electrification plan for ComEd. The ICC rejected ComEd’s request to treat a large portion of beneficial electrification costs as a regulatory asset and ordered ComEd to seek cost recovery through the multi-year rate plan filing for 2024 and 2025, and the final formula rate reconciliation docket for 2023, rather than through a separate charge. The order also authorized an overall annual budget of $77 million per year for the three year plan period (2023 through 2025), with flexibility to roll forward unused funds to future years within the same plan period. On April 18, 2023, ComEd filed an application for rehearing in the beneficial electrification plan docket. The Chicago Transit Authority and City of Chicago, jointly, and the Office of the Illinois Attorney General (ILAG) also filed applications for rehearing. On April 27, 2023, ICC staff filed a motion for clarification, seeking clarification from the ICC on the precise budget described in the final order. On May 8, 2023, the ICC denied all applications for rehearing, and entered an amendatory order regarding the annual beneficial electrification plan budgets. ComEd has been directed to use good faith efforts to spend $77 million annually. ComEd subsequently filed its compliance filing in May 2023, detailing project related spending, clarifying the procedure that will be used to seek stakeholder feedback related to beneficial electrification pilot programs, and including the timeline for tariff changes required to implement the programs. ComEd and the ILAG both filed appeals of the ICC’s interim order that addressed the permissible scope of utility beneficial electrification programs outside of transportation and the rate impact cap. The ILAG also filed an appeal seeking reversal of portions of the ICC’s final decision. The final order partly mooted ComEd’s appeal of the interim order and ComEd has decided not to pursue the other issues. As such, ComEd recently moved to voluntarily dismiss its appeal and the appellate court granted that request. The ILAG consolidated their appeals. Any ruling on the appeals, even a negative ruling removing programs from the BE Plan or lowering the overall budget of the BE Plan, will only impact forward-looking costs. Energy Efficiency Formula Rate (Exelon and ComEd). ComEd filed its annual energy efficiency formula rate update with the ICC on May 26, 2023. The filing establishes the revenue requirement used to set the rates that will take effect in January 2024 after the ICC's review and approval. The requested revenue requirement update is based on a reconciliation of the 2022 actual costs plus projected 2024 expenditures. Initial Revenue Requirement Increase Annual Reconciliation Increase Total Revenue Requirement Increase Requested Return on Rate Base (a) Requested ROE $ 87 $ 31 $ 118 6.48 % 8.91 % __________ (a) The requested revenue requirement increase provides for a weighted average debt and equity return on the energy efficiency regulatory asset and rate base of 6.48% inclusive of an allowed ROE of 8.91%, reflecting the monthly average yields for 30-year treasury bonds plus 580 basis points. For the 2022 reconciliation year, the requested revenue requirement provides for a weighted average debt and equity return on the energy efficiency regulatory asset and rate base of 7.48% inclusive of an allowed ROE of 10.91%, which includes an upward performance adjustment that increased the ROE. The performance adjustment can either increase or decrease the ROE based upon the achievement of energy efficiency savings goals. New Jersey Regulatory Matters Termination of Energy Procurement Provisions of PPAs (Exelon, PHI, and ACE). On December 22, 2021, ACE filed with the NJBPU a petition to terminate the provisions in the PPAs to purchase electricity from two coal-powered generation facilities located in the state of New Jersey. The petition was approved by the NJBPU on March 23, 2022. Upon closing of the transaction on March 31, 2022, ACE recognized a liability of $203 million for the contract termination fee, which is to be paid by the end of 2024, and recognized a corresponding regulatory asset of $203 million. As of September 30, 2023, the $71 million liability for the contract termination fee consists of $61 million and $10 million included in Other current liabilities and Other deferred credits and other liabilities, respectively, in Exelon's Consolidated Balance Sheet. The current and noncurrent liabilities are included in PPA termination obligation and Other deferred credits and other liabilities, respectively, in PHI's and ACE's Consolidated Balance Sheets. For the nine months ended September 30, 2023 and 2022, ACE has respectively paid $65 million and $45 million of the liability, which is recorded in Changes in Other assets and liabilities in Exelon's, PHI's, and ACE's Consolidated Statements of Cash Flows. ACE Infrastructure Investment Program “Powering the Future” Filing (Exelon, PHI, and ACE). On October 31, 2022, ACE filed with the NJBPU a second IIP, called “Powering the Future”, proposing to seek recovery through a new component of ACE’s rider mechanism, totaling $379 million, over the four-year period of July 1, 2023, to June 30, 2027. The new IIP will allow ACE to invest in projects that are designed to enhance the reliability, resiliency, and safety of the service ACE provides to its customers. On June 15, 2023, ACE entered into a settlement agreement with other parties, which allows for a recovery totaling $93 million of reliability related capital investments from July 1, 2023, through June 30, 2027. ACE will have the option of seeking approval from the NJBPU to extend the end date of the IIP beyond June 30, 2027, if ACE determines an extension is necessary. On June 29, 2023, the NJBPU adopted the settlement agreement and issued an order approving the program. Other Federal Regulatory Matters FERC Audit (Exelon and ComEd). The Utility Registrants are subject to periodic audits by FERC. FERC’s Division of Audits and Accounting initiated a nonpublic audit of ComEd in April 2021 evaluating ComEd’s compliance with (1) approved terms, rates, and conditions of its federally regulated service; (2) accounting requirements of the Uniform System of Accounts; (3) reporting requirements of the FERC Form 1; and (4) the requirements for record retention. The audit period extends back to January 1, 2017. During the first quarter of 2023, ComEd was provided with information from FERC about several potential findings, including ComEd's methodology regarding the allocation of certain overhead costs to capital under FERC regulations. Based on the preliminary findings and discussions with FERC staff, ComEd determined that a loss was probable and recorded a regulatory liability to reflect its best estimate of that loss as of March 31, 2023. On July 27, 2023, FERC issued a final audit report which included, among other things, findings and recommendations related to ComEd's methodology regarding the allocation of certain overhead costs to capitalized construction costs under FERC regulations. On August 28, 2023, ComEd filed a formal notice of the issues it will contest. The final outcome and resolution of any contested audit issues as well as a reasonable estimate of potential future losses cannot be accurately estimated at this stage; however, the final resolution of these matters could result in recognition of future losses, above the amounts currently accrued, that could be material to the Exelon and ComEd financial statements. Regulatory Assets and Liabilities The Utility Registrants' regulatory assets and liabilities have not changed materially since December 31, 2022, unless noted below. See Note 3 — Regulatory Matters of the 2022 Form 10-K for additional information on the specific regulatory assets and liabilities. ComEd. Regulatory assets increased $733 million primarily due to increases of $392 million in the Electric distribution formula rate annual reconciliations regulatory asset, $171 million in the Energy efficiency costs, and $97 million in the ZEC regulatory asset. PECO. Regulatory assets increased $150 million primarily due to an increase of $118 million in the Deferred income taxes regulatory asset. Regulatory liabilities increased $6 million primarily due to increases of $49 million in the Electric energy and natural gas costs regulatory liability, offset by a decrease of $31 million in the Decommissioning the regulatory agreement units regulatory liability. BGE. Regulatory assets increased $114 million primarily due to an increase of $38 million and $35 million in the Removal costs and Under-recovered revenue decoupling regulatory assets, respectively. Pepco . Regulatory assets decreased $63 million primarily due to a decrease of $35 million in the Electric energy and natural gas costs regulatory asset. Regulatory liabilities decreased $43 million primarily due to a decrease of $52 million in the Deferred income taxes regulatory liability. DPL . Regulatory assets decreased $17 million primarily due to a decrease of $26 million in the Electric energy and natural gas costs regulatory asset. Regulatory liabilities decreased $1 million primarily due to a decrease of $23 million in the Deferred income taxes regulatory liability, partially offset by an increase of $13 million in the Electric energy and natura

Revenue from Contracts with Cus

Revenue from Contracts with Customers (All Registrants)	9 Months Ended
Revenue from Contracts with Customers (All Registrants)	Sep. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers (All Registrants)	Revenue from Contracts with Customers (All Registrants) The Registrants recognize revenue from contracts with customers to depict the transfer of goods or services to customers at an amount that the entities expect to be entitled to in exchange for those goods or services. The primary sources of revenue include regulated electric and gas tariff sales, distribution, and transmission services. See Note 4 — Revenue from Contracts with Customers of the 2022 Form 10-K for additional information regarding the primary sources of revenue for the Registrants. Contract Liabilities The Registrants record contract liabilities when consideration is received or due prior to the satisfaction of the performance obligations. The Registrants record contract liabilities in Other current liabilities and Other noncurrent deferred credits and other liabilities in their Consolidated Balance Sheets. For PHI, Pepco, DPL, and ACE these contract liabilities primarily relate to upfront consideration received in the third quarter of 2020 for a collaborative arrangement with an unrelated owner and manager of communication infrastructure. The revenue attributable to this arrangement will be recognized as operating revenue over the 35 years under the collaborative arrangement. The following table provides a rollforward of the contract liabilities reflected in Exelon's, PHI's, Pepco's, DPL's, and ACE's Consolidated Balance Sheets for the three and nine months ended September 30, 2023 and 2022. At September 30, 2023 and December 31, 2022, ComEd's, PECO's, and BGE's contract liabilities were immaterial. Exelon (a) PHI (a) Pepco (a) DPL ACE (a) Balance at December 31, 2022 $ 101 $ 101 $ 81 $ 10 $ 10 Revenues recognized (1) (1) (1) — — Balance at March 31, 2023 100 100 80 10 10 Revenues recognized (2) (2) (2) — — Balance at June 30, 2023 $ 98 $ 98 $ 78 $ 10 $ 10 Revenues recognized (2) (2) (1) — (1) Balance as of September 30, 2023 $ 96 $ 96 $ 77 $ 10 $ 9 Exelon (a) PHI (a) Pepco (a) DPL (a) ACE (a) Balance at December 31, 2021 $ 109 $ 109 $ 87 $ 11 $ 11 Revenues recognized (2) (2) (2) — — Balance at March 31, 2022 107 107 85 11 11 Revenues recognized (2) (2) (1) — (1) Balance at June 30, 2022 $ 105 $ 105 $ 84 $ 11 $ 10 Revenues recognized (2) (2) (1) (1) — Balance as of September 30, 2022 $ 103 $ 103 $ 83 $ 10 $ 10 __________ (a) Revenues recognized in the three and nine months ended September 30, 2023 and 2022, were included in the contract liabilities at December 31, 2022 and 2021, respectively. Transaction Price Allocated to Remaining Performance Obligations The following table shows the amounts of future revenues expected to be recorded in each year for performance obligations that are unsatisfied or partially unsatisfied as of September 30, 2023. This disclosure only includes contracts for which the total consideration is fixed and determinable at contract inception. The average contract term varies by customer type and commodity but ranges from one month to several years. This disclosure excludes the Utility Registrants' gas and electric tariff sales contracts and transmission revenue contracts as they generally have an original expected duration of one year or less and, therefore, do not contain any future, unsatisfied performance obligations to be included in this disclosure. Year Exelon PHI Pepco DPL ACE 2023 $ 2 $ 2 $ 2 $ — $ 1 2024 6 6 5 — — 2025 5 5 5 — — 2026 5 5 5 — — 2027 and thereafter 78 78 60 10 8 Total $ 96 $ 96 $ 77 $ 10 $ 9 Revenue Disaggregation The Registrants disaggregate revenue recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. See Note 5 — Segment Information for the presentation of the Registrants' revenue disaggregation.

Segment Information (All Regist

Segment Information (All Registrants)	9 Months Ended
Segment Information (All Registrants)	Sep. 30, 2023
Segment Reporting [Abstract]
Segment Information (All Registrants)	Segment Information (All Registrants) Operating segments for each of the Registrants are determined based on information used by the CODMs in deciding how to evaluate performance and allocate resources at each of the Registrants. Exelon has six reportable segments, which include ComEd, PECO, BGE, and PHI's three reportable segments consisting of Pepco, DPL, and ACE. ComEd, PECO, BGE, Pepco, DPL, and ACE each represent a single reportable segment, and as such, no separate segment information is provided for these Registrants. Exelon, ComEd, PECO, BGE, Pepco, DPL, and ACE's CODMs evaluate the performance of and allocate resources to the segments based on net income. An analysis and reconciliation of the Registrants’ reportable segment information to the respective information in the consolidated financial statements for the three and nine months ended September 30, 2023 and 2022 is as follows: Three Months Ended September 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 2,268 $ 970 $ 836 $ 1,747 $ — $ (28) $ 5,793 Natural gas revenues — 67 96 24 — — 187 Shared service and other revenues — — — 2 445 (447) — Total operating revenues $ 2,268 $ 1,037 $ 932 $ 1,773 $ 445 $ (475) $ 5,980 2022 Electric revenues $ 1,378 $ 941 $ 757 $ 1,557 $ — $ (12) $ 4,621 Natural gas revenues — 73 113 38 — — 224 Shared service and other revenues — — — 3 381 (384) — Total operating revenues $ 1,378 $ 1,014 $ 870 $ 1,598 $ 381 $ (396) $ 4,845 Intersegment revenues (c) : 2023 $ 9 $ 2 $ 2 $ 2 $ 443 $ (458) $ — 2022 6 3 3 3 378 (393) — Depreciation and amortization: 2023 $ 357 $ 100 $ 161 $ 257 $ 15 $ — $ 890 2022 333 92 148 238 14 — 825 Operating expenses: 2023 $ 1,738 $ 847 $ 835 $ 1,440 $ 475 $ (478) $ 4,857 2022 913 798 810 1,254 439 (380) 3,834 Interest expense, net: 2023 $ 119 $ 52 $ 47 $ 80 $ 139 $ — $ 437 2022 104 45 39 72 105 — 365 Income (loss) from continuing operations before income taxes: 2023 $ 427 $ 149 $ 56 $ 281 $ (130) $ (16) $ 767 2022 375 179 26 291 (103) — 768 Income Taxes: 2023 $ 94 $ 3 $ 11 $ 49 $ (90) $ — $ 67 2022 84 44 (7) 2 (31) — 92 Net income (loss) from continuing operations: 2023 $ 333 $ 146 $ 45 $ 232 $ (41) $ (15) $ 700 2022 291 135 33 289 (71) (1) 676 Capital Expenditures: 2023 $ 664 $ 361 $ 330 $ 488 $ 12 $ — $ 1,855 2022 593 333 340 398 8 — 1,672 __________ (a) Other primarily includes Exelon’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 16 — Related Party Transactions for additional information on intersegment revenues. PHI : Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2023 Electric revenues $ 822 $ 426 $ 502 $ — $ (3) $ 1,747 Natural gas revenues — 24 — — — 24 Shared service and other revenues — — — 103 (101) 2 Total operating revenues $ 822 $ 450 $ 502 $ 103 $ (104) $ 1,773 2022 Electric revenues $ 724 $ 374 $ 462 $ — $ (3) $ 1,557 Natural gas revenues — 38 — — — 38 Shared service and other revenues — — — 94 (91) 3 Total operating revenues $ 724 $ 412 $ 462 $ 94 $ (94) $ 1,598 Intersegment revenues (c) : 2023 $ 1 $ 2 $ — $ 103 $ (104) $ 2 2022 2 1 — 94 (94) 3 Depreciation and amortization: 2023 $ 112 $ 62 $ 77 $ 6 $ — $ 257 2022 99 59 74 6 — 238 Operating expenses: 2023 $ 658 $ 386 $ 394 $ 105 $ (103) $ 1,440 2022 555 345 353 96 (95) 1,254 Interest expense, net: 2023 $ 41 $ 18 $ 19 $ 3 $ (1) $ 80 2022 37 16 17 1 1 72 Income (loss) before income taxes: 2023 $ 141 $ 51 $ 94 $ (4) $ (1) $ 281 2022 146 54 95 (4) — 291 Income Taxes: 2023 $ 21 $ 8 $ 23 $ (3) $ — $ 49 2022 1 2 1 (2) — 2 Net income (loss): 2023 $ 120 $ 43 $ 71 $ (2) $ — $ 232 2022 145 52 94 (2) — 289 Capital Expenditures: 2023 $ 227 $ 158 $ 101 $ 2 $ — $ 488 2022 193 100 105 — — 398 _________ (a) Other primarily includes PHI’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon. Electric and Gas Revenue by Customer Class (Utility Registrants): The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Three Months Ended September 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 1,047 $ 654 $ 512 $ 959 $ 405 $ 255 $ 299 Small commercial & industrial 540 148 86 199 54 70 75 Large commercial & industrial 263 67 144 386 303 32 51 Public authorities & electric railroads 11 7 7 16 9 3 4 Other (a) 265 80 104 201 67 67 68 Total electric revenues (b) $ 2,126 $ 956 $ 853 $ 1,761 $ 838 $ 427 $ 497 Natural gas revenues Residential $ — $ 43 $ 57 $ 12 $ — $ 12 $ — Small commercial & industrial — 16 10 7 — 7 — Large commercial & industrial — — 25 1 — 1 — Transportation — 7 — 3 — 3 — Other (c) — 1 4 1 — 1 — Total natural gas revenues (d) $ — $ 67 $ 96 $ 24 $ — $ 24 $ — Total revenues from contracts with customers $ 2,126 $ 1,023 $ 949 $ 1,785 $ 838 $ 451 $ 497 Other revenues Revenues from alternative revenue programs $ 135 $ 11 $ (22) $ (15) $ (18) $ (2) $ 5 Other electric revenues (e) 7 3 4 3 2 1 — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ 142 $ 14 $ (17) $ (12) $ (16) $ (1) $ 5 Total revenues for reportable segments $ 2,268 $ 1,037 $ 932 $ 1,773 $ 822 $ 450 $ 502 Three Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 935 $ 620 $ 406 $ 808 $ 318 $ 207 $ 283 Small commercial & industrial 217 149 88 179 44 65 70 Large commercial & industrial (117) 93 158 401 303 43 55 Public authorities & electric railroads 3 8 7 16 9 4 3 Other (a) 246 71 101 166 57 55 54 Total electric revenues (b) $ 1,284 $ 941 $ 760 $ 1,570 $ 731 $ 374 $ 465 Natural gas revenues Residential $ — $ 46 $ 70 $ 10 $ — $ 10 $ — Small commercial & industrial — 20 13 6 — 6 — Large commercial & industrial — — 28 3 — 3 — Transportation — 5 — 3 — 3 — Other (c) — 2 2 16 — 16 — Total natural gas revenues (d) $ — $ 73 $ 113 $ 38 $ — $ 38 $ — Total revenues from contracts with customers $ 1,284 $ 1,014 $ 873 $ 1,608 $ 731 $ 412 $ 465 Other revenues Revenues from alternative revenue programs $ 88 $ (5) $ (8) $ (11) $ (8) $ — $ (3) Other electric revenues (e) 6 5 4 1 1 — — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ 94 $ — $ (3) $ (10) $ (7) $ — $ (3) Total revenues for reportable segments $ 1,378 $ 1,014 $ 870 $ 1,598 $ 724 $ 412 $ 462 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2023 and 2022 respectively of: • $9 million, $6 million at ComEd • $2 million, $3 million at PECO • $1 million, $2 million at BGE • $2 million, $3 million at PHI • $1 million, $2 million at Pepco • $2 million, $1 million at DPL • less than $1 million, less than $1 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2023 and 2022 of: • less than $1 million at PECO • $1 million at BGE (e) Includes late payment charge revenues. Nine Months Ended September 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 5,836 $ 2,484 $ 2,322 $ 4,459 $ — $ (45) $ 15,056 Natural gas revenues — 493 664 150 — (3) 1,304 Shared service and other revenues — — — 6 1,316 (1,322) — Total operating revenues $ 5,836 $ 2,977 $ 2,986 $ 4,615 $ 1,316 $ (1,370) $ 16,360 2022 Electric revenues $ 4,536 $ 2,390 $ 2,122 $ 4,058 $ — $ (24) $ 13,082 Natural gas revenues — 487 688 157 — (2) 1,330 Shared service and other revenues — — — 8 1,342 (1,350) — Total operating revenues $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,342 $ (1,376) $ 14,412 Intersegment revenues (c) : 2023 $ 14 $ 6 $ 6 $ 7 $ 1,310 $ (1,343) $ — 2022 14 5 13 9 1,342 (1,377) 6 Depreciation and amortization: 2023 $ 1,045 $ 297 $ 487 $ 741 $ 46 $ — $ 2,616 2022 982 277 470 697 46 — 2,472 Operating expenses: 2023 $ 4,472 $ 2,436 $ 2,503 $ 3,864 $ 1,521 $ (1,367) $ 13,429 2022 3,357 2,230 2,446 3,535 1,524 (1,288) 11,804 Interest expense, net: 2023 $ 357 $ 149 $ 135 $ 238 $ 402 $ (4) $ 1,277 2022 308 129 110 216 300 — 1,063 Income (loss) from continuing operations before income taxes: 2023 $ 1,057 $ 418 $ 362 $ 593 $ (424) $ (21) $ 1,985 2022 909 541 270 528 (228) (42) 1,978 Income taxes: 2023 $ 235 $ 8 $ 76 $ 103 $ (149) $ 1 $ 274 2022 203 67 3 10 82 (9) 356 Net income (loss) from continuing operations: 2023 $ 822 $ 410 $ 286 $ 490 $ (275) $ (22) $ 1,711 2022 706 474 267 518 (310) (33) 1,622 Capital expenditures: 2023 $ 1,926 $ 1,068 $ 986 $ 1,510 $ 50 $ — $ 5,540 2022 1,801 991 918 1,174 68 — 4,952 Total assets: September 30, 2023 $ 42,042 $ 15,259 $ 13,649 $ 26,656 $ 5,825 $ (4,172) $ 99,259 December 31, 2022 39,661 14,502 13,350 26,082 6,014 (4,260) 95,349 __________ (a) Other primarily includes Exelon’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 16 — Related Party Transactions for additional information on intersegment revenues. PHI: Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2023 Electric revenues $ 2,174 $ 1,123 $ 1,172 $ 1 $ (11) $ 4,459 Natural gas revenues — 150 — — — 150 Shared service and other revenues — — — 309 (303) 6 Total operating revenues $ 2,174 $ 1,273 $ 1,172 $ 310 $ (314) $ 4,615 2022 Electric revenues $ 1,919 $ 1,019 $ 1,120 $ — $ — $ 4,058 Natural gas revenues — 157 — — — 157 Shared service and other revenues — — — 298 (290) 8 Total operating revenues $ 1,919 $ 1,176 $ 1,120 $ 298 $ (290) $ 4,223 Intersegment revenues (c) : 2023 $ 5 $ 5 $ 1 $ 309 $ (313) $ 7 2022 4 5 2 288 (290) 9 Depreciation and amortization: 2023 $ 329 $ 182 $ 212 $ 18 $ — $ 741 2022 312 172 192 21 — 697 Operating expenses: 2023 $ 1,810 $ 1,079 $ 971 $ 318 $ (314) $ 3,864 2022 1,588 999 947 291 (290) 3,535 Interest expense, net: 2023 $ 122 $ 53 $ 52 $ 9 $ 2 $ 238 2022 111 48 49 7 1 216 Income (loss) before income taxes: 2023 $ 292 $ 153 $ 162 $ (14) $ — $ 593 2022 259 138 133 (2) — 528 Income taxes: 2023 $ 43 $ 25 $ 40 $ (5) $ — $ 103 2022 (2) 8 2 2 — 10 Net income (loss): 2023 $ 249 $ 128 $ 122 $ (9) $ — $ 490 2022 261 130 131 (4) — 518 Capital expenditures: 2023 $ 710 $ 416 $ 376 $ 8 $ — $ 1,510 2022 595 294 284 1 — 1,174 Total assets: September 30, 2023 $ 11,061 $ 5,870 $ 5,155 $ 4,644 $ (74) $ 26,656 December 31, 2022 10,657 5,802 4,979 4,677 (33) 26,082 __________ (a) Other primarily includes PHI’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon. Electric and Gas Revenue by Customer Class (Utility Registrants): The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Nine Months Ended September 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,744 $ 1,617 $ 1,308 $ 2,181 $ 954 $ 626 $ 601 Small commercial & industrial 1,363 415 253 503 134 189 180 Large commercial & industrial 553 196 412 1,099 838 98 163 Public authorities & electric railroads 33 23 22 49 25 11 13 Other (a) 716 219 303 563 187 186 194 Total electric revenues (b) $ 5,409 $ 2,470 $ 2,298 $ 4,395 $ 2,138 $ 1,110 $ 1,151 Natural gas revenues Residential $ — $ 335 $ 406 $ 88 $ — $ 88 $ — Small commercial & industrial — 123 66 40 — 40 — Large commercial & industrial — 1 124 3 — 3 — Transportation — 20 — 11 — 11 — Other (c) — 12 28 8 — 8 — Total natural gas revenues (d) $ — $ 491 $ 624 $ 150 $ — $ 150 $ — Total revenues from contracts with customers $ 5,409 $ 2,961 $ 2,922 $ 4,545 $ 2,138 $ 1,260 $ 1,151 Other revenues Revenues from alternative revenue programs $ 405 $ 1 $ 47 $ 59 $ 28 $ 10 $ 21 Other electric revenues (e) 22 13 12 11 8 3 — Other natural gas revenues (e) — 2 5 — — — — Total other revenues $ 427 $ 16 $ 64 $ 70 $ 36 $ 13 $ 21 Total revenues for reportable segments $ 5,836 $ 2,977 $ 2,986 $ 4,615 $ 2,174 $ 1,273 $ 1,172 Nine Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,610 $ 1,538 $ 1,158 $ 2,007 $ 826 $ 570 $ 611 Small commercial & industrial 953 386 239 461 117 173 171 Large commercial & industrial 48 229 418 1,056 806 99 151 Public authorities & electric railroads 22 23 20 47 25 11 11 Other (a) 718 202 297 524 157 168 190 Total electric revenues (b) $ 4,351 $ 2,378 $ 2,132 $ 4,095 $ 1,931 $ 1,021 $ 1,134 Natural gas revenues Residential $ — $ 335 $ 448 $ 77 $ — $ 77 $ — Small commercial & industrial — 125 77 35 — 35 — Large commercial & industrial — — 128 9 — 9 — Transportation — 19 — 11 — 11 — Other (c) — 7 50 25 — 25 — Total natural gas revenues (d) $ — $ 486 $ 703 $ 157 $ — $ 157 $ — Total revenues from contracts with customers $ 4,351 $ 2,864 $ 2,835 $ 4,252 $ 1,931 $ 1,178 $ 1,134 Other revenues Revenues from alternative revenue programs $ 163 $ 1 $ (40) $ (33) $ (15) $ (3) $ (14) Other electric revenues (e) 22 11 11 4 3 1 — Other natural gas revenues (e) — 1 4 — — — — Total other revenues $ 185 $ 13 $ (25) $ (29) $ (12) $ (2) $ (14) Total revenues for reportable segments $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,919 $ 1,176 $ 1,120 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2023 and 2022 respectively of: • $14 million, $14 million at ComEd • $5 million, $5 million at PECO • $4 million, $5 million at BGE • $7 million, $9 million at PHI • $5 million, $4 million at Pepco • $5 million, $5 million at DPL • $1 million, $2 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2023 and 2022 respectively of: • $1 million, $1 million at PECO • $2 million, $7 million at BGE (e) Includes late payment charge revenues.

Accounts Receivable (All Regist

Accounts Receivable (All Registrants)	9 Months Ended
Accounts Receivable (All Registrants)	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Accounts Receivable (All Registrants)	Accounts Receivable (All Registrants) Allowance for Credit Losses on Accounts Receivable The following tables present the rollforward of Allowance for Credit Losses on Customer Accounts Receivable. Three Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2023 $ 323 $ 67 $ 101 $ 50 $ 105 $ 50 $ 21 $ 34 Plus: Current period provision for expected credit losses (a) 72 24 13 9 26 11 6 9 Less: Write-offs, net of recoveries (b) 54 15 19 7 13 5 4 4 Balance at September 30, 2023 $ 341 $ 76 $ 95 $ 52 $ 118 $ 56 $ 23 $ 39 Three Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 Plus: Current period provision for expected credit losses 38 10 12 2 14 6 1 7 Less: Write-offs, net of recoveries 51 17 16 5 12 4 3 5 Balance at September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 Nine Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2022 $ 327 $ 59 $ 105 $ 54 $ 109 $ 47 $ 21 $ 41 Plus: Current period provision for expected credit losses (c)(d) 144 45 32 23 44 24 10 10 Less: Write-offs, net (e)(f)(g) of recoveries (b) 130 28 42 25 35 15 8 12 Balance at September 30, 2023 $ 341 $ 76 $ 95 $ 52 $ 118 $ 56 $ 23 $ 39 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2021 $ 320 $ 73 $ 105 $ 38 $ 104 $ 37 $ 18 $ 49 Plus: Current period provision for expected credit losses 141 31 33 30 47 23 8 16 Less: Write-offs, net of recoveries 120 30 35 14 40 16 6 18 Balance at September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 __________ (a) For ComEd, BGE, PHI, Pepco, DPL and ACE, the change in current period provision for expected credit losses is primarily a result of increased receivable balances. (b) Recoveries were not material to the Registrants. (c) For ComEd and DPL, the change in current period provision for expected credit losses is primarily a result of increased receivable balances. (d) For BGE and ACE, the change in current period provision for expected credit losses is primarily a result of changes in customer risk profile. (e) For PECO and BGE, the change in write-offs is primarily a result of increased disconnection activities. (f) For DPL, the change in write-offs is primarily attributable to unfavorable customer payment behavior. (g) For ACE, the change in write-offs is primarily attributable to the termination of the moratorium in New Jersey, which beginning in March 2020, prevented customer disconnections for non-payment. Disconnection activities resumed in January 2022, driving the change in write-offs of aging accounts receivable for the nine months ended September 20, 2023. The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable. Three Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2023 $ 87 $ 18 $ 8 $ 8 $ 53 $ 31 $ 9 $ 13 Plus: Current period provision (benefit) for expected credit losses 6 3 2 3 (2) (2) — — Less: Write-offs, net of recoveries (a) 5 1 2 2 — — — — Balance at September 30, 2023 $ 88 $ 20 $ 8 $ 9 $ 51 $ 29 $ 9 $ 13 Three Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 14 Plus: Current period provision (benefit) for expected credit losses 8 2 2 2 2 2 (1) 1 Less: Write-offs, net of recoveries 5 2 1 1 1 — — 1 Balance at September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 Nine Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2022 $ 82 $ 17 $ 9 $ 10 $ 46 $ 25 $ 7 $ 14 Plus: Current period provision for expected credit losses 21 6 3 5 7 4 2 1 Less: Write-offs, net of recoveries (a) 15 3 4 6 2 — — 2 Balance at September 30, 2023 $ 88 $ 20 $ 8 $ 9 $ 51 $ 29 $ 9 $ 13 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2021 $ 72 $ 17 $ 7 $ 9 $ 39 $ 16 $ 8 $ 15 Plus: Current period provision (benefit) for expected credit losses 24 5 6 6 7 6 (1) 2 Less: Write-offs, net of recoveries 12 4 2 3 3 — — 3 Balance at September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 __________ (a) Recoveries were not material to the Registrants. Unbilled Customer Revenue The following table provides additional information about unbilled customer revenues recorded in the Registrants' Consolidated Balance Sheets at September 30, 2023 and December 31, 2022. Unbilled customer revenues (a) Exelon ComEd PECO BGE PHI Pepco DPL ACE September 30, 2023 $ 740 $ 279 $ 135 $ 118 $ 208 $ 100 $ 44 $ 64 December 31, 2022 912 223 219 247 223 103 74 46 __________ (a) Unbilled customer revenues are classified in Customer accounts receivable, net in the Registrants' Consolidated Balance Sheets. Other Purchases of Customer and Other Accounts Receivables The Utility Registrants are required, under separate legislation and regulations in Illinois, Pennsylvania, Maryland, District of Columbia, Delaware, and New Jersey, to purchase certain receivables from alternative retail electric and, as applicable, natural gas suppliers that participate in the utilities' consolidated billing. The following table presents the total receivables purchased. Total receivables purchased Exelon ComEd PECO BGE PHI Pepco DPL ACE Nine months ended September 30, 2023 $ 3,124 $ 726 $ 843 $ 628 $ 927 $ 600 $ 174 $ 153 Nine months ended September 30, 2022 3,088 (a) 753 832 607 (a) 896 559 168 169 __________

Income Taxes (All Registrants)

Income Taxes (All Registrants)	9 Months Ended
Income Taxes (All Registrants)	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes (All Registrants)	Income Taxes (All Registrants) Rate Reconciliation The effective income tax rate from continuing operations varies from the U.S. federal statutory rate principally due to the following: Three Months Ended September 30, 2023 (a) Exelon ComEd PECO (b) BGE PHI Pepco DPL ACE U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of federal income tax benefit (c) (2.7) 7.8 (1.2) 6.6 6.2 5.5 6.1 7.0 Plant basis differences (4.4) (0.4) (15.6) (0.2) (1.5) (2.4) (0.9) (0.5) Excess deferred tax amortization (6.4) (5.3) (2.4) (5.4) (8.0) (9.2) (10.0) (3.1) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.1) (0.1) Tax credits (0.5) (1.2) — (2.0) (0.5) (0.6) (0.4) (0.3) Other 1.8 0.2 0.2 (0.3) 0.3 0.6 — 0.5 Effective income tax rate 8.7 % 22.0 % 2.0 % 19.6 % 17.4 % 14.9 % 15.7 % 24.5 % Three Months Ended September 30, 2022 (a) Exelon ComEd PECO (d) BGE (d) PHI (d) Pepco (d) DPL (d) ACE (d) U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of federal income tax benefit 9.0 8.0 20.7 6.8 1.4 (2.7) 6.5 7.0 Plant basis differences (5.3) (0.4) (14.2) (2.6) (1.7) (2.3) (0.8) (1.0) Excess deferred tax amortization (11.6) (5.6) (3.2) (47.3) (19.3) (14.6) (21.7) (25.5) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.2) (0.1) — (0.2) (0.2) Tax credits (0.6) (0.4) — (1.9) (0.9) (0.8) (1.3) (0.7) Other (0.4) (0.1) 0.3 (2.7) 0.3 0.1 0.2 0.5 Effective income tax rate 12.0 % 22.4 % 24.6 % (26.9) % 0.7 % 0.7 % 3.7 % 1.1 % __________ (a) Positive percentages represent income tax expense. Negative percentages represent income tax benefit. (b) For PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. (c) For Exelon, the lower state income taxes, net of federal income tax expense, is primarily due to the long-term marginal state income tax rate change of $54 million. (d) For PECO, the higher effective tax rate is related to a one-time state income expense, net of federal income tax benefit, of $38 million attributable to the change in the Pennsylvania corporate income tax rate partially offset by plant basis differences attributable to tax repair deductions. For BGE, PHI, Pepco, DPL, and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. Nine Months Ended September 30, 2023 (a) Exelon ComEd PECO (b) BGE PHI Pepco DPL ACE U.S. Federal statutory rate 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% Increase (decrease) due to: State income taxes, net of federal income tax benefit (c) 2.8 7.8 (1.3) 6.5 6.1 5.5 6.2 6.9 Plant basis differences (4.3) (0.4) (15.5) (0.5) (1.6) (2.5) (1.0) (0.5) Excess deferred tax amortization (6.6) (5.5) (2.4) (5.4) (7.7) (9.2) (9.4) (2.6) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.1) (0.1) Tax credits (0.5) (0.7) — (0.7) (0.6) (0.7) (0.4) (0.3) Other 1.5 0.1 0.1 0.2 0.3 0.6 — 0.3 Effective income tax rate 13.8% 22.2% 1.9% 21.0% 17.4% 14.7% 16.3% 24.7% Nine Months Ended September 30, 2022 (a) Exelon ComEd PECO (d) BGE (d) PHI (d) Pepco (d) DPL (d) ACE (d) U.S. Federal statutory rate 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% Increase (decrease) due to: State income taxes, net of federal income tax benefit (e) 9.5 7.9 6.6 2.8 2.0 (3.2) 6.5 6.9 Plant basis differences (4.2) (0.5) (12.2) (1.1) (1.7) (2.4) (0.7) (1.1) Excess deferred tax amortization (11.3) (5.7) (3.2) (20.7) (18.8) (15.4) (20.4) (24.7) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.2) (0.2) Tax credits (f) 0.3 (0.3) — (0.7) (0.7) (0.6) (0.7) (0.6) Other (g) 2.8 — 0.2 (0.1) 0.2 (0.2) 0.3 0.2 Effective income tax rate 18.0% 22.3% 12.4% 1.1% 1.9% (0.8)% 5.8% 1.5% __________ (a) Positive percentages represent income tax expense. Negative percentages represent income tax benefit. (b) For PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. (c) For Exelon, the lower state income taxes, net of federal income tax expense, is primarily due to the long-term marginal state income tax rate change of $54 million. (d) For PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions partially offset by higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. For BGE, PHI, Pepco, DPL and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. (e) For Exelon, the higher state income taxes, net of federal income tax benefit, is primarily due to the long-term marginal state income tax rate change of approximately $67 million and the recognition of a valuation allowance of approximately $40 million against the net deferred tax asset position for certain standalone state filing jurisdictions, partially offset by a one-time impact associated with a state tax benefit of $43 million and indemnification adjustments pursuant to the Tax Matters Agreement of $4 million as a result of the separation. For PECO, the higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. (f) For Exelon, reflects the income tax expense related to the write-off of federal tax credits subject to recapture of approximately $15 million as a result of the separation. (g) For Exelon, primarily reflects the nondeductible transaction costs of approximately $19 million arising as part of the separation and indemnification adjustments pursuant to the Tax Matters Agreement of $40 million. Unrecognized Tax Benefits Exelon, PHI and ACE have the following unrecognized tax benefits at September 30, 2023 and December 31, 2022. ComEd's, PECO's, BGE's, Pepco's, and DPL's amounts are not material. Exelon (a) PHI ACE September 30, 2023 $ 138 $ 56 $ 16 December 31, 2022 148 59 17 __________ (a) At September 30, 2023 and December 31, 2022, Exelon reflected a receivable of $50 million in Other deferred debits and other assets in the Consolidated Balance Sheet for Constellation’s share of unrecognized tax benefits for periods prior to the separation. Reasonably possible the total amount of unrecognized tax benefits could significantly increase or decrease within 12 months after the reporting date. As of September 30, 2023, ACE has $14 million of unrecognized state tax benefits that could significantly decrease within the 12 months after the reporting date based on the outcome of pending court cases involving other taxpayers. The unrecognized tax benefit, if recognized, may be included in future base rates and that portion would have no impact to the effective tax rate. Other Tax Matters Tax Matters Agreement (Exelon) In connection with the separation, Exelon entered into a TMA with Constellation. The TMA governs the respective rights, responsibilities, and obligations between Exelon and Constellation after the separation with respect to tax liabilities, refunds and attributes for open tax years that Constellation was part of Exelon’s consolidated group for U.S. federal, state, and local tax purposes. Indemnification for Taxes. As a former subsidiary of Exelon, Constellation has joint and several liability with Exelon to the IRS and certain state jurisdictions relating to the taxable periods prior to the separation. The TMA specifies that Constellation is liable for their share of taxes required to be paid by Exelon with respect to taxable periods prior to the separation to the extent Constellation would have been responsible for such taxes under the existing Exelon tax sharing agreement. As of September 30, 2023, Exelon recorded a payable of $15 million in Other current liabilities that is due to Constellation. Tax Refunds. The TMA specifies that Constellation is entitled to their share of any future tax refunds claimed by Exelon with respect to taxable periods prior to the separation to the extent that Constellation would have received such tax refunds under the existing Exelon tax sharing agreement. Tax Attributes . At the date of separation certain tax attributes, primarily pre-closing tax credit carryforwards, that were generated by Constellation were required by law to be allocated to Exelon. The TMA provides that Exelon will reimburse Constellation when those allocated tax credit carryforwards are utilized. As of September 30, 2023, Exelon recorded a payable of $22 million and $509 million in Other current liabilities and Other deferred credits and other liabilities, respectively, in the Consolidated Balance Sheet for tax attribute carryforwards that are expected to be utilized and reimbursed to Constellation. Corporate Alternative Minimum Tax (All Registrants) On August 16, 2022, the IRA was signed into law and implements a new corporate alternative minimum tax (CAMT) that imposes a 15.0% tax on modified GAAP net income. Corporations are entitled to a tax credit (minimum tax credit) to the extent the CAMT liability exceeds the regular tax liability. This amount can be carried forward indefinitely and used in future years when regular tax exceeds the CAMT. Beginning in 2023, based on the existing statue, Exelon and each of the Utility Registrants will be subject to and will report the CAMT on a separate Registrant basis in the Consolidated Statements of Operations and Comprehensive Income and the Consolidated Balance Sheets. The deferred tax asset related to the minimum tax credit carryforward will be realized to the extent Exelon’s consolidated deferred tax liabilities exceed the minimum tax credit carryforward. Exelon’s deferred tax liabilities are expected to exceed the minimum tax credit carryforward for the foreseeable future and thus no valuation allowance is required. Exelon is continuing to assess the financial statement impacts of the IRA and will update estimates based on future guidance issued by the U.S. Treasury. Long-Term Marginal State Income Tax Rate (Exelon) In the third quarter of 2023, Exelon updated its marginal state income tax rates for changes in state apportionment. The changes in marginal rates in the third quarter of 2023 resulted in a decrease of $54 million to the deferred tax liability at Exelon, and a corresponding adjustment to income tax expense, net of federal taxes. Allocation of Tax Benefits (All Registrants) The Utility Registrants are party to an agreement with Exelon that provides for the allocation of consolidated tax liabilities and benefits (Tax Sharing Agreement). The Tax Sharing Agreement provides that each party is allocated an amount of tax similar to that which would be owed had the party been separately subject to tax. In addition, any net benefit attributable to Exelon is reallocated to the Utility Registrants. That allocation is treated as a contribution to capital from Exelon to the party receiving the benefit. The following table presents the allocation of tax benefits from Exelon under the Tax Sharing Agreement, for the three and nine months ended September 30, 2023, and 2022. ComEd PECO BGE PHI Pepco DPL ACE September 30, 2023 $ 13 $ 19 $ — $ 10 $ 4 $ — $ 2 September 30, 2022 $ 1 $ 47 $ — $ 28 23 $ 3 2

Retirement Benefits (All Regist

Retirement Benefits (All Registrants)	9 Months Ended
Retirement Benefits (All Registrants)	Sep. 30, 2023
Retirement Benefits [Abstract]
Retirement Benefits (All Registrants)	Retirement Benefits (All Registrants) Defined Benefit Pension and OPEB The majority of the 2023 pension benefit cost for the Exelon-sponsored plans is calculated using an expected long-term rate of return on plan assets of 7.00% and a discount rate of 5.53%. The majority of the 2023 OPEB cost is calculated using an expected long-term rate of return on plan assets of 6.50% for funded plans and a discount rate of 5.51%. During the first quarter of 2023, Exelon received an updated valuation of its pension and OPEB to reflect actual census data as of January 1, 2023. This valuation resulted in an increase to the pension obligation of $27 million and an increase to the OPEB obligation of $2 million. Additionally, AOCI increased by $10 million (after-tax) and regulatory assets and liabilities increased by $18 million and $1 million, respectively. A portion of the net periodic benefit cost for all plans is capitalized within the Consolidated Balance Sheets. The following table presents the components of Exelon's net periodic benefit costs, prior to capitalization, for the three and nine months ended September 30, 2023 and 2022. Pension Benefits OPEB Three Months Ended September 30, Three Months Ended September 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 39 $ 58 $ 6 $ 10 Interest cost 145 110 25 19 Expected return on assets (189) (205) (21) (25) Amortization of: Prior service cost (credit) 1 1 (2) (5) Actuarial loss 41 73 — 4 Settlement charges 18 — — — Net periodic benefit cost $ 55 $ 37 $ 8 $ 3 Pension Benefits OPEB Nine Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 116 $ 177 $ 18 $ 30 Interest cost 434 330 76 57 Expected return on assets (566) (619) (63) (75) Amortization of: Prior service cost (credit) 2 3 (7) (15) Actuarial loss (gain) 125 222 (1) 12 Settlement charges 18 — — — Net periodic benefit cost $ 129 $ 113 $ 23 $ 9 The amounts below represent the Registrants' allocated pension and OPEB costs. For Exelon, the service cost component is included in Operating and maintenance expense and Property, plant, and equipment, net while the non-service cost components are included in Other, net and Regulatory assets. For the Utility Registrants, which apply multi-employer accounting, the service cost and non-service cost components are included in Operating and maintenance expense and Property, plant, and equipment, net in their consolidated financial statements. Three Months Ended September 30, Nine Months Ended September 30, Pension and OPEB Costs (Benefit) 2023 2022 2023 2022 Exelon $ 63 $ 40 $ 152 $ 122 ComEd 6 15 19 45 PECO (3) (2) (10) (6) BGE 14 11 42 33 PHI 25 13 74 39 Pepco 9 2 26 6 DPL 4 1 13 3 ACE 3 3 10 9 Defined Contribution Savings Plan The Registrants participate in a 401(k) defined contribution savings plan that is sponsored by Exelon. The plan is qualified under applicable sections of the IRC and allows employees to contribute a portion of their pre-tax and/or after-tax income in accordance with specified guidelines. All Registrants match a percentage of the employee contributions up to certain limits. The following table presents the employer contributions and employer matching contributions to the savings plan for the three and nine months ended September 30, 2023 and 2022. Three Months Ended September 30, Nine Months Ended September 30, Savings Plan Employer Contributions 2023 2022 2023 2022 Exelon $ 27 $ 23 $ 74 $ 66 ComEd 12 11 31 29 PECO 3 3 10 9 BGE 3 2 8 7 PHI 5 4 13 11 Pepco 1 1 3 3 DPL 1 1 3 3 ACE 1 1 2 2

Derivative Financial Instrument

Derivative Financial Instruments (All Registrants)	9 Months Ended
Derivative Financial Instruments (All Registrants)	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments (All Registrants)	Derivative Financial Instruments (All Registrants) The Registrants use derivative instruments to manage commodity price risk and interest rate risk related to ongoing business operations. The Registrants do not execute derivatives for speculative or proprietary trading purposes. Authoritative guidance requires that derivative instruments be recognized as either assets or liabilities at fair value, with changes in fair value of the derivative recognized in earnings immediately. Other accounting treatments are available through special election and designation, provided they meet specific, restrictive criteria both at the time of designation and on an ongoing basis. These alternative permissible accounting treatments include NPNS, cash flow hedges, and fair value hedges. At ComEd, derivative economic hedges related to commodities are recorded at fair value and offset by a corresponding regulatory asset or liability. At Exelon, derivative economic hedges related to interest rates are recorded at fair value and offsets are recorded to Electric operating revenues or Interest expense based on the activity the transaction is economically hedging. For all NPNS derivative instruments, accounts receivable or accounts payable are recorded when derivatives settle and revenue or expense is recognized in earnings as the underlying physical commodity is sold or consumed. At Exelon, derivative hedges that qualify and are designated as cash flow hedges are recorded at fair value and offsets are recorded to AOCI. ComEd’s use of cash collateral is generally unrestricted unless ComEd is downgraded below investment grade. Cash collateral held by PECO, BGE, Pepco, DPL, and ACE must be deposited in an unaffiliated major U.S. commercial bank or foreign bank with a U.S. branch office that meets certain qualifications. Commodity Price Risk The Registrants employ established policies and procedures to manage their risks associated with market fluctuations in commodity prices by entering into physical and financial derivative contracts, which are either determined to be non-derivative or classified as economic hedges. The Utility Registrants procure electric and natural gas supply through a competitive procurement process approved by each of the respective state utility commissions. The Utility Registrants’ hedging programs are intended to reduce exposure to energy and natural gas price volatility and have no direct earnings impact as the costs are fully recovered from customers through regulatory-approved recovery mechanisms. The following table provides a summary of the Utility Registrants’ primary derivative hedging instruments, listed by commodity and accounting treatment. Registrant Commodity Accounting Treatment Hedging Instrument ComEd Electricity NPNS Fixed price contracts based on all requirements in the IPA procurement plans. Electricity Changes in fair value of economic hedge recorded to an offsetting regulatory asset or liability (a) 20-year floating-to-fixed energy swap contracts beginning June 2012 based on the renewable energy resource procurement requirements in the Illinois Settlement Legislation of approximately 1.3 million MWhs per year. PECO Electricity NPNS Fixed price contracts for default supply requirements through full requirements contracts. Gas NPNS Fixed price contracts to cover about 10% of planned natural gas purchases in support of projected firm sales. BGE Electricity NPNS Fixed price contracts for all SOS requirements through full requirements contracts. Gas NPNS Fixed price contracts for between 10-20% of forecasted system supply requirements for flowing (i.e., non-storage) gas for the November through March period. Pepco Electricity NPNS Fixed price contracts for all SOS requirements through full requirements contracts. DPL Electricity NPNS Fixed price contracts for all SOS requirements through full requirements contracts. Gas NPNS Fixed and index priced contracts through full requirements contracts. Gas Changes in fair value of economic hedge recorded to an offsetting regulatory asset or liability (b) Exchange traded future contracts for up to 50% of estimated monthly purchase requirements each month, including purchases for storage injections. ACE Electricity NPNS Fixed price contracts for all BGS requirements through full requirements contracts. __________ (a) See Note 3 — Regulatory Matters of the 2022 Form 10-K for additional information. (b) The fair value of the DPL economic hedge is not material at September 30, 2023 and December 31, 2022. The fair value of derivative economic hedges is presented in Other current assets and current and noncurrent Mark-to-market derivative liabilities in Exelon's and ComEd's Consolidated Balance Sheets. Interest Rate and Other Risk (Exelon) Exelon Corporate uses a combination of fixed-rate and variable-rate debt to manage interest rate exposure. Exelon Corporate may utilize interest rate derivatives to lock in rate levels in anticipation of future financings, which are typically designated as cash flow hedges. In addition, Exelon Corporate may also utilize interest rate swaps to manage interest rate exposure and manage potential fluctuations in Electric operating revenues at the corporate level in consolidation, which are directly correlated to yields on U.S. Treasury bonds under ComEd's distribution formula rate. These interest rate swaps are accounted for as economic hedges. A hypothetical 50 basis point change in the interest rates associated with Exelon's interest rate swaps as of September 30, 2023 would result in an immaterial impact to Exelon's Consolidated Net Income. Below is a summary of the interest rate hedge balances at September 30, 2023 and December 31, 2022 . September 30, 2023 Derivatives Designated Economic Hedges Total Other current assets $ — $ 3 $ 3 Other deferred debits (noncurrent assets) 41 — 41 Total derivative assets 41 3 44 Mark-to-market derivative liabilities (current liabilities) — (23) (23) Total mark-to-market derivative liabilities — (23) (23) Total mark-to-market derivative net assets (liabilities) $ 41 $ (20) $ 21 December 31, 2022 Derivatives Designated Economic Hedges Total Other deferred debits (noncurrent assets) $ 6 $ 5 $ 11 Total derivative assets 6 5 11 Mark-to-market derivative liabilities (current liabilities) — (3) (3) Mark-to-market derivative liabilities (noncurrent liabilities) (4) — (4) Total mark-to-market derivative liabilities (4) (3) (7) Total mark-to-market derivative net assets $ 2 $ 2 $ 4 Cash Flow Hedges (Interest Rate Risk) For derivative instruments that qualify and are designated as cash flow hedges, the changes in fair value each period are initially recorded in AOCI and reclassified into earnings when the underlying transaction affects earnings. In January 2023, Exelon Corporate entered into $115 million notional of 5-year maturity floating-to-fixed swaps and $115 million notional of 10-year maturity floating-to-fixed swaps, for a total of $230 million designated as cash flow hedges. In February 2023, Exelon terminated the previously issued floating-to-fixed swaps with a total notional of $1.5 billion upon issuance of $2.5 billion of debt. See Note 10 – Debt and Credit Agreements for additional information on the debt issuance. Prior to the termination, the AOCI derivative gain was $7 million (net of tax). The settlements resulted in a cash receipt of $10 million, which is being amortized into Interest expense in Exelon's Consolidated Statement of Operations and Comprehensive Income over the 5-year and 10-year terms of the swaps. Since the termination in February 2023, Exelon has entered into additional floating-to-fixed swaps. The following table provides the notional amounts outstanding held by Exelon at September 30, 2023 and December 31, 2022. September 30, 2023 December 31, 2022 5-year maturity floating-to-fixed swaps $ 390 $ 635 10-year maturity floating-to-fixed swaps 390 635 Total $ 780 $ 1,270 The related AOCI derivative gain for the three and nine months ended as of September 30, 2023 was $22 million and $31 million (net of tax). See Note 14 – Changes in Accumulated Other Comprehensive Income (Loss) for additional information. Economic Hedges (Interest Rate and Other Risk) Exelon Corporate executes derivative instruments to mitigate exposure to fluctuations in interest rates but for which the fair value or cash flow hedge elections were not made. For derivatives intended to serve as economic hedges, fair value is recorded on the balance sheet and changes in fair value each period are recognized in earnings or as a regulatory asset or liability, if regulatory requirements are met, each period. Exelon Corporate enters into floating-to-fixed interest rate cap swaps to manage a portion of interest rate exposure in connection with existing borrowings. In the fourth quarter of 2022, Exelon Corporate entered into $1 billion notional of 18-month maturity floating-to-fixed interest rate cap swaps and $850 million notional of 6-month maturity floating-to-fixed interest rate cap swaps, for a total of $1.85 billion notional of floating-to-fixed interest rate cap swaps as of December 31, 2022. The 6-month maturity floating-to-fixed interest rate cap swaps of $850 million notional matured in March 2023. Exelon receives payments on the interest rate cap when the floating rate exceeds the fixed rate. Settlements received are immaterial as of September 30, 2023. Additionally, to manage potential fluctuations in Electric operating revenues related to ComEd's distribution formula rate, Exelon Corporate enters into 30-year constant maturity treasury interest rate (Corporate 30-year treasury) swaps. The following table provides the notional amounts outstanding held by Exelon at September 30, 2023 and December 31, 2022. Hedging Instrument September 30, 2023 December 31, 2022 Interest rate cap swaps $ 1,000 $ 1,850 Constant maturity treasury interest rate swaps 4,875 500 Total $ 5,875 $ 2,350 For the three and nine months ended September 30, 2023, Exelon Corporate recognized the following net pre-tax mark-to-market (losses) which are also recognized in Net fair value changes related to derivatives in Exelon's Consolidated Statements of Cash Flows. Exelon had no swaps for the three and nine months ended September 30, 2022. Three Months Ended September 30, 2023 Nine Months Ended September 30, 2023 Income Statement Location (Loss) Gain (Loss) Gain Electric operating revenues $ (16) $ (21) Interest expense — 1 Total $ (16) $ (20) Credit Risk The Registrants would be exposed to credit-related losses in the event of non-performance by counterparties on executed derivative instruments. The credit exposure of derivative contracts, before collateral, is represented by the fair value of contracts at the reporting date. The Utility Registrants have contracts to procure electric and natural gas supply that provide suppliers with a certain amount of unsecured credit. If the exposure on the supply contract exceeds the amount of unsecured credit, the suppliers may be required to post collateral. The net credit exposure is mitigated primarily by the ability to recover procurement costs through customer rates. The amount of cash collateral received from external counterparties decreased as of September 30, 2023 due to decreasing energy prices. The following table reflects the Registrants' cash collateral held from external counterparties, which is recorded in Other current liabilities on their respective Consolidated Balance Sheets, at September 30, 2023 and December 31, 2022: September 30, 2023 December 31, 2022 Exelon $ 112 $ 297 ComEd 105 77 PECO (a) — — BGE 1 23 PHI 6 197 Pepco (b) — 26 DPL 1 121 ACE 5 50 __________ (a) PECO had less than one million in cash collateral held with external parties at September 30, 2023 and December 31, 2022. (b) Pepco had less than one million in cash collateral held with external parties at September 30, 2023.

Debt and Credit Agreements (All

Debt and Credit Agreements (All Registrants)	9 Months Ended
Debt and Credit Agreements (All Registrants)	Sep. 30, 2023
Debt Disclosure [Abstract]
Debt and Credit Agreements (All Registrants)	Debt and Credit Agreements (All Registrants) Short-Term Borrowings Exelon Corporate, ComEd, and BGE meet their short-term liquidity requirements primarily through the issuance of commercial paper. PECO meets its short-term liquidity requirements primarily through the issuance of commercial paper and borrowings from the Exelon intercompany money pool. Pepco, DPL, and ACE meet their short-term liquidity requirements primarily through the issuance of commercial paper and borrowings from the PHI intercompany money pool. PHI Corporate meets its short-term liquidity requirements primarily through the issuance of short-term notes and borrowings from the Exelon intercompany money pool. The Registrants may use their respective credit facilities for general corporate purposes, including meeting short-term funding requirements and the issuance of letters of credit. Commercial Paper The following table reflects the Registrants' commercial paper programs supported by the revolving credit agreements at September 30, 2023 and December 31, 2022. Outstanding Commercial Average Interest Rate on Commercial Paper Issuer September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 Exelon (a) $ 820 $ 1,938 5.44 % 4.77 % ComEd 277 427 5.42 % 4.71 % PECO — 239 — % 4.71 % BGE 59 409 5.43 % 4.81 % PHI (b) 173 414 5.47 % 4.78 % Pepco — 299 — % 4.79 % DPL — 115 — % 4.76 % ACE 173 — 5.47 % — % __________ (a) Exelon Corporate had $311 million and $449 million in outstanding commercial paper borrowings at September 30, 2023 and December 31, 2022, respectively. (b) Represents the consolidated amounts of Pepco, DPL, and ACE. Revolving Credit Agreements Exelon Corporate and the Utility Registrants each have a 5-year revolving credit facility. The following table reflects the credit agreements: Borrower Aggregate Bank Commitment Interest Rate Exelon Corporate $ 900 SOFR plus 1.275 % ComEd 1,000 SOFR plus 1.000 % PECO 600 SOFR plus 0.900 % BGE 600 SOFR plus 0.900 % Pepco 300 SOFR plus 1.075 % DPL 300 SOFR plus 1.000 % ACE 300 SOFR plus 1.075 % Exelon Corporate and the Utility Registrants had no outstanding amounts on the revolving credit facilities as of September 30, 2023. The Utility Registrants have credit facility agreements, arranged at minority and community banks, which are solely utilized to issue letters of credit. The facility agreements have aggregate commitments of $40 million, $40 million, $15 million, $15 million, $15 million, and $15 million, at ComEd, PECO, BGE, Pepco, DPL, and ACE, respectively. These facilities expire on October 4, 2024. See Note 16 — Debt and Credit Agreements of the 2022 Form 10-K for additional information on the Registrants' credit facilities. Short-Term Loan Agreements On March 23, 2017, Exelon Corporate entered into a term loan agreement for $500 million. The loan agreement was renewed in the first quarter of 2023 and was bifurcated into two tranches of $300 million on March 14, 2023 and $200 million on March 24, 2023. The agreements will expire on March 14, 2024 and March 22, 2024, respectively. Pursuant to the loan agreements, loans made thereunder bear interest at a variable rate equal to SOFR plus 0.90% and all indebtedness thereunder is unsecured. The loan agreement is reflected in Exelon's Consolidated Balance Sheets within Short-term borrowings. On October 4, 2022, ComEd entered into a 364-day term loan agreement for $150 million with a variable rate equal to SOFR plus 0.75% and an expiration date of October 3, 2023. The proceeds from this loan were used to repay outstanding commercial paper obligations. The balance of the loan was repaid on January 13, 2023 in conjunction with the $400 million and $575 million First Mortgage Bond agreements that were entered into on January 3, 2023. Refer to the Issuance of Long-Term Debt table below for further information. On May 9, 2023, ComEd entered into a 364-day term loan agreement for $400 million with a variable rate equal to SOFR plus 1.00% and an expiration date of May 7, 2024. The proceeds from this loan were used to repay outstanding commercial paper obligations and for general corporate purposes. The loan agreement is reflected in Exelon's and ComEd's Consolidated Balance Sheets within Short-term borrowings. Long-Term Debt Issuance of Long-Term Debt During the nine months ended September 30, 2023, the following long-term debt was issued: Company Type Interest Rate Maturity Amount Use of Proceeds Exelon Notes 5.15% March 15, 2028 $1,000 Repay existing indebtedness and for general corporate purposes. Exelon Notes 5.30% March 15, 2033 850 Repay existing indebtedness and for general corporate purposes. Exelon Notes 5.60% March 15, 2053 650 Repay existing indebtedness and for general corporate purposes. ComEd First Mortgage Bonds, Series 134 4.90% February 1, 2033 400 Repay outstanding commercial paper obligations and to fund other general corporate purposes. ComEd First Mortgage Bonds Series 135 5.30% February 1, 2053 575 Repay outstanding commercial paper obligations and to fund other general corporate purposes. PECO First and Refunding Mortgage Bonds 4.90% June 15, 2033 575 Refinance existing indebtedness, refinance outstanding commercial paper obligations, and for general corporate purposes. BGE Notes 5.40% June 1, 2053 700 Repay outstanding commercial paper obligations, repay existing indebtedness, and for general corporate purposes. Pepco First Mortgage Bonds 5.30% March 15, 2033 85 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 5.40% March 15, 2038 40 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 5.57% March 15, 2053 125 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 5.35% September 13, 2033 100 Repay existing indebtedness and for general corporate purposes. DPL (a) First Mortgage Bonds 5.30% March 15, 2033 60 Repay existing indebtedness and for general corporate purposes. DPL First Mortgage Bonds 5.57% March 15, 2053 65 Repay existing indebtedness and for general corporate purposes. ACE First Mortgage Bonds 5.57% March 15, 2053 75 Repay existing indebtedness and for general corporate purposes. __________ (a) On March 15, 2023, DPL entered into a purchase agreement of First Mortgage Bonds of $340 million, $75 million, and $110 million at 5.45%, 5.55% and 5.72% due on November 8, 2033, November 8, 2038, and November 8, 2053, respectively. The closing date of the issuance is expected to occur in November 2023. Debt Covenants As of September 30, 2023, the Registrants are in compliance with debt covenants.

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities (All Registrants)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and Liabilities (All Registrants)	Fair Value of Financial Assets and Liabilities (All Registrants) Exelon measures and classifies fair value measurements in accordance with the hierarchy as defined by GAAP. The hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three levels as follows: • Level 1 — quoted prices (unadjusted) in active markets for identical assets or liabilities that the Registrants have the ability to liquidate as of the reporting date. • Level 2 — inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data. • Level 3 — unobservable inputs, such as internally developed pricing models or third-party valuations for the asset or liability due to little or no market activity for the asset or liability. Exelon’s valuation techniques used to measure the fair value of the assets and liabilities shown in the tables below are in accordance with the policies discussed in Note 17 — Fair Value of Financial Assets and Liabilities of the 2022 Form 10-K. Fair Value of Financial Liabilities Recorded at Amortized Cost The following tables present the carrying amounts and fair values of the Registrants’ short-term liabilities, long-term debt, and trust preferred securities (long-term debt to financing trusts or junior subordinated debentures) as of September 30, 2023 and December 31, 2022. The Registrants have no financial liabilities measured using the NAV practical expedient. The carrying amounts of the Registrants’ short-term liabilities as presented in their Consolidated Balance Sheets are representative of their fair value (Level 2) because of the short-term nature of these instruments. September 30, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Long-Term Debt, including amounts due within one year (a) Exelon $ 41,085 $ — $ 31,584 $ 2,675 $ 34,259 $ 37,074 $ — $ 29,902 $ 2,327 $ 32,229 ComEd 11,484 — 9,343 — 9,343 10,518 — 9,006 — 9,006 PECO 5,133 — 4,110 — 4,110 4,612 — 3,864 50 3,914 BGE 4,601 — 3,735 — 3,735 4,207 — 3,613 — 3,613 PHI 8,637 — 4,352 2,675 7,027 8,120 — 4,507 2,277 6,784 Pepco 4,095 — 2,129 1,473 3,602 3,751 — 2,229 1,205 3,434 DPL 2,060 — 1,126 543 1,669 1,938 — 1,164 458 1,622 ACE 1,833 — 893 659 1,552 1,757 — 909 614 1,523 Long-Term Debt to Financing Trusts Exelon $ 390 $ — $ — $ 384 $ 384 $ 390 $ — $ — $ 384 $ 384 ComEd 205 — — 206 206 205 — — 204 204 PECO 184 — — 179 179 184 — — 180 180 __________ (a) Includes unamortized debt issuance costs, unamortized debt discount and premium, net, purchase accounting fair value adjustments, and finance lease liabilities which are not fair valued. Refer to Note 16 — Debt and Credit Agreements of the 2022 Form 10-K for unamortized debt issuance costs, unamortized debt discount and premium, net, and purchase accounting fair value adjustments and Note 10 — Leases of the 2022 Form 10-K for finance lease liabilities. Recurring Fair Value Measurements The following tables present assets and liabilities measured and recorded at fair value in the Registrants' Consolidated Balance Sheets on a recurring basis and their level within the fair value hierarchy at September 30, 2023 and December 31, 2022. The Registrants have no financial assets or liabilities measured using the NAV practical expedient: Exelon At September 30, 2023 At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 649 $ — $ — $ 649 $ 664 $ — $ — $ 664 Rabbi trust investments Cash equivalents 66 — — 66 62 — — 62 Mutual funds 53 — — 53 49 — — 49 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 60 42 102 — 58 40 98 Rabbi trust investments subtotal 119 67 42 228 111 65 40 216 Interest rate derivative assets Derivatives designated as hedging instruments — 41 — 41 — 6 — 6 Economic hedges — 3 — 3 — 5 — 5 Interest rate derivative assets subtotal — 44 — 44 — 11 — 11 Total assets 768 111 42 921 775 76 40 891 Liabilities Commodity derivative liabilities — — (134) (134) — — (84) (84) Interest rate derivative liabilities Derivatives designated as hedging instruments — — — — — (4) — (4) Economic hedges — (23) — (23) — (3) — (3) Interest rate derivative liabilities subtotal — (23) — (23) — (7) — (7) Deferred compensation obligation — (69) — (69) — (75) — (75) Total liabilities — (92) (134) (226) — (82) (84) (166) Total net assets (liabilities) $ 768 $ 19 $ (92) $ 695 $ 775 $ (6) $ (44) $ 725 __________ (a) Exelon excludes cash of $188 million and $345 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $110 million and $81 million at September 30, 2023 and December 31, 2022, respectively, and includes long-term restricted cash of $212 million and $117 million at September 30, 2023 and December 31, 2022, respectively, which is reported in Other deferred debits and other assets in the Consolidated Balance Sheets. ComEd, PECO, and BGE ComEd PECO BGE At September 30, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 491 $ — $ — $ 491 $ 29 $ — $ — $ 29 $ 2 $ — $ — $ 2 Rabbi trust investments Mutual funds — — — — 9 — — 9 9 — — 9 Life insurance contracts — — — — — 17 — 17 — — — — Rabbi trust investments subtotal — — — — 9 17 — 26 9 — — 9 Total assets 491 — — 491 38 17 — 55 11 — — 11 Liabilities Commodity derivative liabilities (b) — — (134) (134) — — — — — — — — Deferred compensation obligation — (7) — (7) — (8) — (8) — (4) — (4) Total liabilities — (7) (134) (141) — (8) — (8) — (4) — (4) Total net assets (liabilities) $ 491 $ (7) $ (134) $ 350 $ 38 $ 9 $ — $ 47 $ 11 $ (4) $ — $ 7 ComEd PECO BGE At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 392 $ — $ — $ 392 $ 10 $ — $ — $ 10 $ 23 $ — $ — $ 23 Rabbi trust investments Mutual funds — — — — 7 — — 7 7 — — 7 Life insurance contracts — — — — — 15 — 15 — — — — Rabbi trust investments subtotal — — — — 7 15 — 22 7 — — 7 Total assets 392 — — 392 17 15 — 32 30 — — 30 Liabilities Commodity derivative liabilities (b) — — (84) (84) — — — — — — — — Deferred compensation obligation — (8) — (8) — (7) — (7) — (4) — (4) Total liabilities — (8) (84) (92) — (7) — (7) — (4) — (4) Total net assets (liabilities) $ 392 $ (8) $ (84) $ 300 $ 17 $ 8 $ — $ 25 $ 30 $ (4) $ — $ 26 __________ (a) ComEd excludes cash of $55 million and $42 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $105 million and $77 million at September 30, 2023 and December 31, 2022, respectively. Additionally, ComEd includes long-term restricted cash of $212 million and $117 million at September 30, 2023 and December 31, 2022, respectively, which is reported in Other deferred debits and other assets in the Consolidated Balance Sheets. PECO excludes cash of $23 million and $58 million at September 30, 2023 and December 31, 2022, respectively. BGE excludes cash of $13 million and $43 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $1 million and $1 million at September 30, 2023 and December 31, 2022, respectively. (b) The Level 3 balance consists of the current and noncurrent liability of $21 million and $113 million, respectively, at September 30, 2023 and $5 million and $79 million, respectively, at December 31, 2022 related to floating-to-fixed energy swap contracts with unaffiliated suppliers. PHI, Pepco, DPL, and ACE At September 30, 2023 At December 31, 2022 PHI Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 83 $ — $ — $ 83 $ 205 $ — $ — $ 205 Rabbi trust investments Cash equivalents 63 — — 63 59 — — 59 Mutual funds 10 — — 10 11 — — 11 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 21 40 61 — 22 39 61 Rabbi trust investments subtotal 73 28 40 141 70 29 39 138 Total assets 156 28 40 224 275 29 39 343 Liabilities Deferred compensation obligation — (13) — (13) — (14) — (14) Total liabilities — (13) — (13) — (14) — (14) Total net assets $ 156 $ 15 $ 40 $ 211 $ 275 $ 15 $ 39 $ 329 Pepco DPL ACE At September 30, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 22 $ — $ — $ 22 $ 1 $ — $ — $ 1 $ 1 $ — $ — $ 1 Rabbi trust investments Cash equivalents 62 — — 62 — — — — — — — — Life insurance contracts — 21 40 61 — — — — — — — — Rabbi trust investments subtotal 62 21 40 123 — — — — — — — — Total assets 84 21 40 145 1 — — 1 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 84 $ 20 $ 40 $ 144 $ 1 $ — $ — $ 1 $ 1 $ — $ — $ 1 Pepco DPL ACE At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 51 $ — $ — $ 51 $ 121 $ — $ — $ 121 $ 1 $ — $ — $ 1 Rabbi trust investments Cash equivalents 59 — — 59 — — — — — — — — Life insurance contracts — 22 38 60 — — — — — — — — Rabbi trust investments subtotal 59 22 38 119 — — — — — — — — Total assets 110 22 38 170 121 — — 121 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 110 $ 21 $ 38 $ 169 $ 121 $ — $ — $ 121 $ 1 $ — $ — $ 1 __________ (a) PHI excludes cash of $60 million and $165 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $3 million and $3 million at September 30, 2023 and December 31, 2022, respectively. Pepco excludes cash of $31 million and $45 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $3 million and $3 million at September 30, 2023 and December 31, 2022, respectively. DPL excludes cash of $5 million and $31 million at September 30, 2023 and December 31, 2022, respectively. ACE excludes cash of $13 million and $71 million at September 30, 2023 and December 31, 2022, respectively. Reconciliation of Level 3 Assets and Liabilities The following tables present the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis during the three and nine months ended September 30, 2023 and 2022: Exelon ComEd PHI and Pepco Three Months Ended September 30, 2023 Total Commodity Life Insurance Contracts Balance at June 30, 2023 $ (91) $ (133) $ 42 Total realized / unrealized gains (losses) Included in net income (a) — — (2) Included in regulatory assets/liabilities (1) (1) (b) — Balance at September 30, 2023 $ (92) $ (134) (c) $ 40 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at September 30, 2023 $ — $ — $ (2) Exelon ComEd PHI and Pepco Three Months Ended September 30, 2022 Total Commodity Life Insurance Contracts Balance at June 30, 2022 $ (50) $ (88) $ 37 Total realized / unrealized gains (losses) Included in net income (a) 1 — 1 Included in regulatory assets/liabilities 45 45 (b) — Balance at September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at September 30, 2022 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Nine Months Ended September 30, 2023 Total Commodity Life Insurance Contracts Balance at December 31, 2022 $ (44) $ (84) $ 40 Total realized / unrealized gains (losses) Included in net income (a) 2 — — Included in regulatory assets/liabilities (50) (50) (b) — Balance at September 30, 2023 $ (92) $ (134) (c) $ 40 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at September 30, 2023 $ 2 $ — $ — Exelon ComEd PHI and Pepco Nine Months Ended September 30, 2022 Total Commodity Life Insurance Contracts Balance at December 31, 2021 $ (182) $ (219) $ 35 Total realized / unrealized gains (losses) Included in net income (a) 3 — 3 Included in regulatory assets/liabilities 176 176 (b) — Transfers out of Level 3 (1) — — Balance at September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gain related to assets and liabilities at September 30, 2022 $ 3 $ — $ 3 __________ (a) Classified in Operating and maintenance expense in the Consolidated Statements of Operations and Comprehensive Income. (b) Includes $5 million of decreases in fair value and an increase for realized gains due to settlements of $4 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2023. Includes $51 million of increases in fair value and a decrease for realized gains due to settlements of $6 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2022. Includes $73 million of decreases in fair value and an increase for realized gains due to settlements of $23 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2023. Includes $179 million of increases in fair value and a decrease for realized losses due to settlements of $3 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2022. (c) The balance consists of a current and noncurrent liability of $21 million and $113 million, respectively, at September 30, 2023. The balance consists of $24 million of current assets and current and noncurrent liability of none and $67 million, respectively at September 30, 2022. Commodity Derivatives (Exelon and ComEd) The table below discloses the significant unobservable inputs to the forward curve used to value mark-to-market derivatives. Type of trade Fair Value at September 30, 2023 Fair Value at December 31, 2022 Valuation Unobservable 2023 Range & Arithmetic Average 2022 Range & Arithmetic Average Commodity derivatives $ (134) $ (84) Discounted Forward power price (a) $30.13 - $72.72 $42.77 $34.78 - $75.71 $48.44 ________ (a) An increase to the forward power price would increase the fair value.

Commitments and Contingencies (

Commitments and Contingencies (All Registrants)	9 Months Ended
Commitments and Contingencies (All Registrants)	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies (All Registrants)	Commitments and Contingencies (All Registrants) The following is an update to the current status of commitments and contingencies set forth in Note 18 — Commitments and Contingencies of the 2022 Form 10-K. Commitments PHI Merger Commitments (Exelon, PHI, Pepco, DPL, and ACE). Approval of the PHI Merger in Delaware, New Jersey, Maryland, and the District of Columbia was conditioned upon Exelon and PHI agreeing to certain commitments. The following amounts represent total commitment costs that have been recorded since the acquisition date and the total remaining obligations for Exelon, PHI, Pepco, DPL, and ACE at September 30, 2023: Description Exelon PHI Pepco DPL ACE Total commitments $ 513 $ 320 $ 120 $ 89 $ 111 Remaining commitments (a) 42 39 34 3 2 __________ (a) Remaining commitments extend through 2026 and include escrow funds, charitable contributions, and rate credits. Commercial Commitments (All Registrants). The Registrants’ commercial commitments at September 30, 2023, representing commitments potentially triggered by future events were as follows: Expiration within Total 2023 2024 2025 2026 2027 2028 and beyond Exelon Letters of credit $ 20 $ 9 $ 11 $ — $ — $ — $ — Surety bonds (a) 207 85 122 — — — — Financing trust guarantees 378 — — — — — 378 Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 634 $ 94 $ 137 $ 6 $ 5 $ 4 $ 388 ComEd Letters of credit $ 12 $ 6 $ 6 $ — $ — $ — $ — Surety bonds (a) 46 5 41 — — — — Financing trust guarantees 200 — — — — — 200 Total commercial commitments $ 258 $ 11 $ 47 $ — $ — $ — $ 200 PECO Letters of credit $ 1 $ — $ 1 $ — $ — $ — $ — Surety bonds (a) 2 — 2 — — — — Financing trust guarantees 178 — — — — — 178 Total commercial commitments $ 181 $ — $ 3 $ — $ — $ — $ 178 BGE Letters of credit $ 4 $ 2 $ 2 $ — $ — $ — $ — Surety bonds (a) 3 1 2 — — — — Total commercial commitments $ 7 $ 3 $ 4 $ — $ — $ — $ — PHI Surety bonds (a) $ 97 $ 75 $ 22 $ — $ — $ — $ — Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 126 $ 75 $ 26 $ 6 $ 5 $ 4 $ 10 Pepco Surety bonds (a) $ 85 $ 71 $ 14 $ — $ — $ — $ — Guaranteed lease residual values (b) 10 — 1 3 2 1 3 Total commercial commitments $ 95 $ 71 $ 15 $ 3 $ 2 $ 1 $ 3 DPL Surety bonds (a) $ 7 $ 2 $ 5 $ — $ — $ — $ — Guaranteed lease residual values (b) 12 — 2 2 2 2 4 Total commercial commitments $ 19 $ 2 $ 7 $ 2 $ 2 $ 2 $ 4 ACE Surety bonds (a) $ 5 $ 2 $ 3 $ — $ — $ — $ — Guaranteed lease residual values (b) 7 — 1 1 1 1 3 Total commercial commitments $ 12 $ 2 $ 4 $ 1 $ 1 $ 1 $ 3 __________ (a) Surety bonds — Guarantees issued related to contract and commercial agreements, excluding bid bonds. (b) Represents the maximum potential obligation in the event that the fair value of certain leased equipment and fleet vehicles is zero at the end of the maximum lease term. The lease term associated with these assets ranges from 1 to 9 years. The maximum potential obligation at the end of the minimum lease term would be $66 million guaranteed by Exelon and PHI, of which $22 million, $26 million, and $18 million is guaranteed by Pepco, DPL, and ACE, respectively. Historically, payments under the guarantees have not been made and PHI believes the likelihood of payments being required under the guarantees is remote. Environmental Remediation Matters General (All Registrants). The Registrants’ operations have in the past, and may in the future, require substantial expenditures to comply with environmental laws. Additionally, under federal and state environmental laws, the Registrants are generally liable for the costs of remediating environmental contamination of property now or formerly owned by them and of property contaminated by hazardous substances generated by them. The Registrants own or lease a number of real estate parcels, including parcels on which their operations or the operations of others may have resulted in contamination by substances that are considered hazardous under environmental laws. In addition, the Registrants are currently involved in a number of proceedings relating to sites where hazardous substances have been deposited and may be subject to additional proceedings in the future. Unless otherwise disclosed, the Registrants cannot reasonably estimate whether they will incur significant liabilities for additional investigation and remediation costs at these or additional sites identified by the Registrants, environmental agencies or others, or whether such costs will be recoverable from third parties, including customers. Additional costs could have a material, unfavorable impact on the Registrants' financial statements. MGP Sites (All Registrants). ComEd, PECO, BGE, and DPL have identified sites where former MGP or gas purification activities have or may have resulted in actual site contamination. For some sites, there are additional PRPs that may share responsibility for the ultimate remediation of each location. • ComEd has 19 sites that are currently under some degree of active study and/or remediation. ComEd expects the majority of the remediation at these sites to continue through at least 2031. • PECO has 6 sites that are currently under some degree of active study and/or remediation. PECO expects the majority of the remediation at these sites to continue through at least 2025. • BGE has 4 sites that currently require some level of remediation and/or ongoing activity. BGE expects the majority of the remediation at these sites to continue through at least 2025. • DPL has 1 site that is currently under study and the required cost at the site is not expected to be material. The historical nature of the MGP and gas purification sites and the fact that many of the sites have been buried and built over, impacts the ability to determine a precise estimate of the ultimate costs prior to initial sampling and determination of the exact scope and method of remedial activity. Management determines its best estimate of remediation costs using all available information at the time of each study, including probabilistic and deterministic modeling for ComEd and PECO, and the remediation standards currently required by the applicable state environmental agency. Prior to completion of any significant clean up, each site remediation plan is approved by the appropriate state environmental agency. ComEd, pursuant to an ICC order, and PECO, pursuant to a PAPUC order, are currently recovering environmental remediation costs of former MGP facility sites through customer rates. While BGE and DPL do not have riders for MGP clean-up costs, they have historically received recovery of actual clean-up costs in distribution rates. During the third quarter of 2023, ComEd and PECO completed an annual study of their future estimated MGP remediation requirements. The study resulted in a $25 million increase to the environmental liability and related regulatory asset for ComEd. The increase was primarily due to increased costs resulting from inflation and changes in remediation plans. The study did not result i n a material change to the environmental liability for PECO. At September 30, 2023 and December 31, 2022, the Registrants had accrued the following undiscounted amounts for environmental liabilities in Accrued expenses, Other current liabilities, and Other deferred credits and other liabilities in their respective Consolidated Balance Sheets: September 30, 2023 December 31, 2022 Total environmental Portion of total related to Total environmental Portion of total related to Exelon $ 434 $ 345 $ 409 $ 355 ComEd 312 311 325 324 PECO 28 26 25 23 BGE 9 8 9 8 PHI 82 — 46 — Pepco 80 — 44 — DPL 1 — 1 — ACE 1 — 1 — Benning Road Site (Exelon, PHI, and Pepco) . In September 2010, PHI received a letter from EPA identifying the Benning Road site as one of six land-based sites potentially contributing to contamination of the lower Anacostia River. A portion of the site, which is owned by Pepco, was formerly the location of an electric generating facility owned by Pepco subsidiary, Pepco Energy Services (PES), which became a part of Generation, following the 2016 merger between PHI and Exelon. This generating facility was deactivated in June 2012. The remaining portion of the site consists of a Pepco transmission and distribution service center that remains in operation. In December 2011, the U.S. District Court for the District of Columbia approved a Consent Decree entered into by Pepco and Pepco Energy Services (hereinafter "Pepco Entities") with the DOEE, which requires the Pepco Entities to conduct a Remedial Investigation and Feasibility Study (RI/FS) for the Benning Road site and an approximately 10 to 15-acre portion of the adjacent Anacostia River. The purpose of this RI/FS is to define the nature and extent of contamination from the Benning Road site and to evaluate remedial alternatives. Pursuant to an internal agreement between the Pepco Entities, since 2013, Pepco has performed the work required by the Consent Decree and has been reimbursed for that work by an agreed upon allocation of costs between the Pepco Entities. In September 2019, the Pepco Entities issued a draft “final” RI report which DOEE approved on February 3, 2020. The Pepco Entities are completing a FS to evaluate possible remedial alternatives for submission to DOEE. In October 2022, DOEE approved dividing the work to complete the landside portion of the FS from the waterside portion to expedite the overall schedule for completion of the project. It is currently anticipated that the landside FS will be complete and approved by DOEE by the end of the first quarter of 2024 and the waterside FS will be complete and approved by DOEE by the end of the fourth quarter of 2024. Following the completion of each FS, DOEE will issue a Proposed Plan for public comment and then issue a Record of Decision (ROD) identifying the remedial actions determined to be necessary for the area in question. On October 3, 2023, DOEE and Pepco entered into an addendum to the Benning Consent Decree pursuant to which Pepco has agreed to fund or perform the remedial actions to be selected by DOEE for the landslide and water areas. This addendum to the Benning Consent Decree has been lodged with the court. Following a 30-day public comment period, DOEE will request that the court approve this addendum to the Consent Decree, which will become effective upon the court’s approval. As part of the separation between Exelon and Constellation in February 2022, the internal agreement between the Pepco Entities for completion and payment for the remaining Consent Decree work was memorialized in a formal agreement for post-separation activities. A second post-separation assumption agreement between Exelon and Constellation transferred any of the potential remaining remediation liability, if any, of PES/Generation to a non-utility subsidiary of Exelon which going forward will be responsible for those liabilities. Exelon, PHI, and Pepco have determined that a loss associated with this matter is probable and have accrued an estimated liability, which is included in the table above. Anacostia River Tidal Reach (Exelon, PHI, and Pepco) . Contemporaneous with the Benning Road site RI/FS being performed by the Pepco Entities, DOEE and NPS have been conducting a separate RI/FS focused on the entire tidal reach of the Anacostia River extending from just north of the Maryland-District of Columbia boundary line to the confluence of the Anacostia and Potomac Rivers. The river-wide RI incorporated the results of the river sampling performed by the Pepco Entities as part of the Benning RI/FS, as well as similar sampling efforts conducted by owners of other sites adjacent to this segment of the river and supplemental river sampling conducted by DOEE’s contractor. On September 30, 2020, DOEE released its Interim ROD for the Anacostia River sediments. The Interim ROD reflects an adaptive management approach which will require several identified “hot spots” in the river to be addressed first while continuing to conduct studies and to monitor the river to evaluate improvements and determine potential future remediation plans. The adaptive management process chosen by DOEE is less intrusive, provides more long-term environmental certainty, is less costly, and allows for site specific remediation plans already underway, including the plan for the Benning Road site to proceed to conclusion. On July 15, 2022, Pepco received a letter from the District of Columbia's Office of the Attorney General (D.C. OAG) on behalf of DOEE conveying a settlement offer to resolve all PRPs' liability to the District of Columbia (District) for their past costs and their anticipated future costs to complete the work for the Interim ROD. Pepco responded on July 27, 2022 to enter into settlement discussions. On October 3, 2023, Pepco and the District entered into another consent decree (the “Anacostia River Consent Decree”) pursuant to which Pepco agreed to pay $47 million to resolve its liability to the District for all past costs to perform the river-wide RI/FS and all future costs to complete the work required by the Interim ROD. This amount will be paid in four equal annual installments beginning a year after the effective date of the Anacostia River Consent Decree. The funds will be deposited into the DOEE’s Clean Land Fund for the District’s costs of the Interim ROD work. The Anacostia River Consent Decree caps Pepco’s liability for these costs and provides Pepco with the right to seek contribution from other potentially responsible parties. The Anacostia River Consent Decree has been filed with the U.S. District Court for the District of Columbia. Following a 30-day public comment period, the District will ask the court to approve the Anacostia River Consent Decree, which will become effective upon the court’s approval. Exelon, PHI, and Pepco have accrued a liability for Pepco’s payment obligations under the Anacostia Consent Decree and management's best estimate of its share of any other future Anacostia River response costs. Pepco has concluded that incremental exposure remains reasonably possible, but management cannot reasonably estimate a range of loss beyond the amounts recorded, which are included in the table above. In addition to the activities associated with the remedial process outlined above, CERCLA separately requires federal and state (here including Washington, D.C.) Natural Resource Trustees (federal or state agencies designated by the President or the relevant state, respectively, or Indian tribes) to conduct an assessment of any damages to natural resources within their jurisdiction as a result of the contamination that is being remediated. The Trustees can seek compensation from responsible parties for such damages, including restoration costs. During the second quarter of 2018, Pepco became aware that the Trustees are in the beginning stages of a NRD assessment, a process that often takes many years beyond the remedial decision to complete. Pepco has concluded that a loss associated with the eventual NRD assessment is reasonably possible. Due to the very early stage of the NRD process, Pepco cannot reasonably estimate the final range of loss potentially resulting from this process. As noted in the Benning Road Site disclosure above, as part of the separation of Exelon and Constellation in February 2022, an assumption agreement was executed transferring any potential future remediation liabilities associated with the Benning Site remediation to a non-utility subsidiary of Exelon. Similarly, any potential future liability associated with the ARSP was also assumed by this entity. Buzzard Point Site (Exelon, PHI, and Pepco). On December 8, 2022, Pepco received a letter from the D.C. OAG, alleging wholly past violations of the District's stormwater discharge and waste disposal requirements related to operations at the Buzzard Point facility, a 9-acre parcel of waterfront property in Washington, D.C. occupied by an active substation and former steam plant building. The letter also alleged wholly past violations by Pepco of stormwater discharge requirements related to its district-wide system of underground vaults. On October 3, 2023, Pepco entered into a Consent Order with the District of Columbia to resolve the alleged violations without any admission of liability. The Consent Order requires Pepco to pay a civil penalty of $10 million. In addition, Pepco has agreed to assess the environmental conditions at its Buzzard Point facility and conduct any remedial actions deemed necessary as a result of the assessment, and also to assess potential environmental impacts associated with the operation of its underground vaults. The Consent Order has been filed with the District of Columbia Superior Court. Following a 30-day public comment period regarding the environmental assessment work required by the Consent Order, the District will ask the court to approve the Consent Order, which will be become effective upon the court’s approval. Exelon, PHI, and Pepco have accrued a liability for the penalty payments and for the projected costs for the required environmental assessments and remediation. Pepco has concluded that incremental exposure is reasonably possible, but the range of loss cannot be reasonably estimated beyond the amounts included in the table above. Litigation and Regulatory Matters DPA and Related Matters (Exelon and ComEd). Exelon and ComEd received a grand jury subpoena in the second quarter of 2019 from the U.S. Attorney’s Office for the Northern District of Illinois (USAO) requiring production of information concerning their lobbying activities in the State of Illinois. On October 4, 2019, Exelon and ComEd received a second grand jury subpoena from the USAO requiring production of records of any communications with certain individuals and entities. On October 22, 2019, the SEC notified Exelon and ComEd that it had also opened an investigation into their lobbying activities. On July 17, 2020, ComEd entered into a Deferred Prosecution Agreement (DPA) with the USAO to resolve the USAO investigation. Under the DPA, the USAO filed a single charge alleging that ComEd improperly gave and offered to give jobs, vendor subcontracts, and payments associated with those jobs and subcontracts for the benefit of the former Speaker of the Illinois House of Representatives and the Speaker’s associates, with the intent to influence the Speaker’s action regarding legislation affecting ComEd’s interests. The DPA provided that the USAO would defer any prosecution of such charge and any other criminal or civil case against ComEd in connection with the matters identified therein for a three-year period subject to certain obligations of ComEd, including payment to the U.S. Treasury of $200 million, which was paid in November 2020. Exelon was not made a party to the DPA, and therefore the investigation by the USAO into Exelon’s activities ended with no charges being brought against Exelon. The three-year term of the DPA ended on July 17, 2023, and on that same date the court granted the USAO’s motion to dismiss the pending charge against ComEd that had been deferred by the DPA. On September 28, 2023, Exelon and ComEd reached a settlement with the SEC, concluding and resolving in its entirety the SEC investigation, which related to the conduct identified in the DPA that was entered into by ComEd in July 2020 and successfully exited in July 2023. Under the terms of the settlement, Exelon has agreed to pay a civil penalty of $46.2 million and Exelon and ComEd have agreed to cease and desist from committing or causing any violations and any future violations of specified provisions of the federal securities laws and rules promulgated thereunder. Exelon recorded an accrual for the full amount of the penalty in the second quarter of 2023, which was reflected in Operating and maintenance expense within Exelon's Consolidated Statements of Operations and Comprehensive Income and in Accrued expenses on the Consolidated Balance Sheets. Exelon paid the civil penalty in full on October 4, 2023. Subsequent to Exelon announcing the receipt of the USAO subpoenas, various lawsuits were filed, and various demand letters were received related to the subject of the subpoenas, the conduct described in the DPA and the SEC's investigation, including: • Four putative class action lawsuits against ComEd and Exelon were filed in federal court on behalf of ComEd customers in the third quarter of 2020 alleging, among other things, civil violations of federal racketeering laws. In addition, the Citizens Utility Board (CUB) filed a motion to intervene in these cases on October 22, 2020 which was granted on December 23, 2020. On September 9, 2021, the federal court granted Exelon’s and ComEd’s motion to dismiss and dismissed the plaintiffs’ and CUB’s federal law claim with prejudice. The federal court also dismissed the related state law claims made by the federal plaintiffs and CUB on jurisdictional grounds. Plaintiffs appealed dismissal of the federal law claim to the Seventh Circuit Court of Appeals. Plaintiffs and CUB also refiled their state law claims in state court and moved to consolidate them with the already pending consumer state court class action, discussed below. On August 22, 2022, the Seventh Circuit affirmed the dismissal of the consolidated federal cases in their entirety. The time to further appeal has passed and the Seventh Circuit’s decision is final. • Three putative class action lawsuits against ComEd and Exelon were filed in Illinois state court in the third quarter of 2020 seeking restitution and compensatory damages on behalf of ComEd customers. The cases were consolidated into a single action in October of 2020. In November 2020, CUB filed a motion to intervene in the cases pursuant to an Illinois statute allowing CUB to intervene as a party or otherwise participate on behalf of utility consumers in any proceeding which affects the interest of utility consumers. On November 23, 2020, the court allowed CUB’s intervention, but denied CUB's request to stay these cases. Plaintiffs subsequently filed a consolidated complaint, and ComEd and Exelon filed a motion to dismiss on jurisdictional and substantive grounds on January 11, 2021. Briefing on that motion was completed on March 2, 2021. The parties agreed, on March 25, 2021, along with the federal court plaintiffs discussed above, to jointly engage in mediation. The parties participated in a one-day mediation on June 7, 2021 but no settlement was reached. On December 23, 2021, the state court granted ComEd and Exelon's motion to dismiss with prejudice. On December 30, 2021, plaintiffs filed a motion to reconsider that dismissal and for permission to amend their complaint. The court denied the plaintiffs' motion on January 21, 2022. Plaintiffs have appealed the court's ruling dismissing their complaint to the First District Court of Appeals. On February 15, 2022, Exelon and ComEd moved to dismiss the federal plaintiffs' refiled state law claims, seeking dismissal on the same legal grounds asserted in their motion to dismiss the original state court plaintiffs' complaint. The court granted dismissal of the refiled state claims on February 16, 2022. The original federal plaintiffs appealed that dismissal on February 18, 2022. The two state appeals were consolidated on March 21, 2022. On September 8, 2023, the Illinois Appellate Court affirmed the dismissal. Plaintiffs may ask the Illinois Supreme Court to grant them leave to further appeal, but such appeal is not allowed as a matter of right. • On November 3, 2022, a plaintiff filed a putative class action complaint in Lake County, Illinois Circuit Court against ComEd and Exelon for unjust enrichment and deceptive business practices in connection with the conduct giving rise to the DPA. Plaintiff seeks an accounting and disgorgement of any benefits ComEd allegedly obtained from said conduct. Plaintiff served initial discovery requests on ComEd in December 2022, to which ComEd has responded. ComEd and Exelon filed a motion to dismiss the Complaint on February 3, 2023. On June 16, 2023, the court granted Exelon and ComEd's motion to dismiss the action with prejudice. Plaintiff filed its notice of appeal of that dismissal on July 17, 2023. Plaintiff's opening appellate brief was filed on October 19, 2023. • A putative class action lawsuit against Exelon and certain officers of Exelon and ComEd was filed in federal court in December 2019 alleging misrepresentations and omissions in Exelon’s SEC filings related to ComEd’s lobbying activities and the related investigations. The complaint was amended on September 16, 2020, to dismiss two of the original defendants and add other defendants, including ComEd. Defendants filed a motion to dismiss in November 2020. The court denied the motion in April 2021. On May 26, 2021, defendants moved the court to certify its order denying the motion to dismiss for interlocutory appeal. Briefing on the motion was completed in June 2021, and that motion was denied on January 28, 2022. In May 2021, the parties each filed respective initial discovery disclosures. On June 9, 2021, defendants filed their answer and affirmative defenses to the complaint and the parties engaged thereafter in discovery. On September 9, 2021, the U.S. government moved to intervene in the lawsuit and stay discovery until the parties entered into an amendment to their protective order that would prohibit the parties from requesting discovery into certain matters, including communications with the U.S. government. The court ordered said amendment to the protective order on November 15, 2021 and discovery resumed. The court further amended the protective order on October 17, 2022 and extended it until May 15, 2023. Following mediation, the parties reached a settlement of the lawsuit, under which defendants agreed to pay plaintiffs $173 million. On May 26, 2023, plaintiffs filed a motion for preliminary approval of the settlement, which the court granted on June 9, 2023. The court granted final settlement approval on September 7, 2023. The settlement was fully covered by insurance and has been paid in full. • Several shareholders have sent letters to the Exelon Board of Directors since 2020 demanding, among other things, that the Exelon Board of Directors investigate and address alleged breaches of fiduciary duties and other alleged violations by Exelon and ComEd officers and directors related to the conduct described in the DPA. In the first quarter of 2021, the Exelon Board of Directors appointed a Special Litigation Committee (SLC) consisting of disinterested and independent parties to investigate and address these shareholders’ allegations and make recommendations to the Exelon Board of Directors based on the outcome of the SLC’s investigation. In July 2021, one of the demand letter shareholders filed a derivative action against current and former Exelon and ComEd officers and directors, and against Exelon, as nominal defendant, asserting the same claims made in its demand letter. On October 12, 2021, the parties to the derivative action filed an agreed motion to stay that litigation for 120 days in order to allow the SLC to continue its investigation, which the court granted. The stay has been extended several times. The parties participated in a mediation in February 2023, but the matter did not resolve at that time. On April 26 and May 1, 2023, two additional demand letter shareholders each filed a separate derivative lawsuit against current and former Exelon and ComEd officers and directors, and certain third parties, and against Exelon as nominal defendant, asserting claims similar to those made in their respective demand letters. On May 25, 2023, certain demand letter shareholders (Settling Shareholders) filed a separate derivative lawsuit against current and former Exelon and ComEd officers and directors, and against Exelon as nominal defendant, asserting claims similar to those made in their respective demand letters. The then pending derivative lawsuits were subsequently consolidated. On May 26, 2023, prior to lawsuit consolidation, the SLC filed a Notice of Determination and Intent to Seek Court Approval of Settlement (Notice of Determination). The Notice of Determination stated that, through mediation efforts, a settlement of the derivative claims had been approved by the SLC, the Independent Review Committee of the Board (which had been formed in the third quarter of 2022, to ensure the Board’s consideration of any SLC recommendations would be independent and objective), the Board, and the Settling Shareholders (the Settling Parties). The Notice of Determination further specified the process by which the Settling Parties would seek court approval of the proposed settlement and resolution and dismissal of all derivative claims and lawsuits, including any lawsuits or actions brought by demand letter shareholders who are not participating in the proposed settlement. In furtherance of the proposed settlement, on June 16, 2023, the SLC filed a motion for preliminary approval of the settlement, attaching the Stipulation and Agreement of Settlement (Stipulation), which contains the terms of the proposed settlement. The proposed settlement terms include but are not limited to: a payment of $40 million to Exelon by Exelon’s insurers of which $10 million constitutes the attorneys’ fee award to be paid to the Settling Shareholders’ counsel; various compliance and disclosure-related reforms; and certain changes in Board and Committee composition. On June 13, 2023, the non-settling derivative shareholders filed a motion asking the court to set a status conference to discuss lifting the discovery stay. On June 29, 2023, an additional shareholder filed a separate derivative lawsuit against current and former Exelon and ComEd officers and directors, and against Exelon as nominal defendant, asserting claims similar to those made in its demand letter. On June 30, 2023, the non-settling shareholders’ motion for status and the SLC’s motion for preliminary approval was heard by the court, during which the court set a briefing schedule on the appropriate standard for evaluating the settlement and the proper scope of requested discovery. Following briefing and a hearing, the court allowed the non-settling shareholders to seek certain, limited discovery, which the SLC, Independent Review Committee, and Exelon responded to on October 5. On October 11, 2023, an additional non-settling shareholder filed a separate derivative lawsuit against current and former Exelon and ComEd officers and directors, and against Exelon as a nominal defendant, asserting claims similar to those made in its demand letter. Plaintiff has informed Exelon that he will move to consolidate this matter with the other pending derivative matters. The SLC filed its renewed motion for preliminary approval on October 26, with supporting submissions filed by the Independent Review Committee, Exelon, and the settling shareholders on that same day. The non-settling plaintiffs have until November 29 to file their response to the renewed motion for preliminary approval, and the SLC has until December 21 to file its reply. • Several shareholders have sent requests seeking review of certain Exelon books and records since August 2021. Exelon has responded to each request. In August 2022, the ICC concluded its investigation initiated on August 12, 2021 into rate impacts of conduct admitted in the DPA, including the costs recovered from customers related to the DPA and Exelon's funding of the fine paid by ComEd. On August 17, 2022, the ICC issued its final order accepting ComEd's voluntary customer refund offer of approximately $38 million (of which about $31 million is ICC jurisdictional; the remaining balance is FERC jurisdictional) that resolves the question of whether customer funds were used for DPA related activities. The customer refund includes the cost of every individual or entity that was either (i) identified in the DPA or (ii) identified by ComEd as an associate of the former Speaker of the Illinois House of Representatives in the ICC proceeding. The ICC’s DPA investigation is now closed. The ICC jurisdictional refund was made to customers during the April 2023 billing cycle, as required by the ICC. The FERC jurisdictional refund was included in ComEd's transmission formula rate update proceeding, filed on May 12, 2023. The filed transmission rate, inclusive of the FERC jurisdictional DPA refund, will appear on ComEd retail customers' bills for the June 2023 through May 202

Shareholders' Equity (Exelon)

Shareholders' Equity (Exelon)	9 Months Ended
Shareholders' Equity (Exelon)	Sep. 30, 2023
Equity [Abstract]
Shareholders' Equity (Exelon)	Shareholders' Equity (Exelon) At-the-Market Program On August 4, 2022, Exelon executed an equity distribution agreement (“Equity Distribution Agreement”), with certain sales agents and forward sellers and certain forward purchasers, establishing an ATM equity distribution program under which it may offer and sell shares of its Common stock, having an aggregate gross sales price of up to $1.0 billion. Exelon has no obligation to offer or sell any shares of Common stock under the Equity Distribution Agreement and may, at any time, suspend or terminate offers and sales under the Equity Distribution Agreement. As of September 30, 2023, Exelon has not issued any shares of Common stock under the ATM program and has not entered into any forward sale agreements.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Exelon)	9 Months Ended
Changes in Accumulated Other Comprehensive Income (Exelon)	Sep. 30, 2023
Changes in Accumulated Other Comprehensive Income [Abstract]
Changes in Accumulated Other Comprehensive Income	Changes in Accumulated Other Comprehensive Income (Loss) (Exelon) The following tables present changes in Exelon's AOCI, net of tax, by component: Nine Months Ended September 30, 2023 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance at December 31, 2022 $ 2 $ (640) $ — $ (638) OCI before reclassifications 6 (10) — (4) Amounts reclassified from AOCI — 3 — 3 Net current-period OCI 6 (7) — (1) Balance at March 31, 2023 8 (647) — (639) OCI before reclassifications 9 (3) — 6 Amounts reclassified from AOCI — 3 — 3 Net current-period OCI 9 — — 9 Balance at June 30, 2023 17 (647) — (630) OCI before reclassifications 22 (3) — 19 Amounts reclassified from AOCI (1) 16 — 15 Net current-period OCI 21 13 — 34 Balance at September 30, 2023 $ 38 $ (634) $ — $ (596) Nine Months Ended September 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance at December 31, 2021 $ (6) $ (2,721) $ (23) $ (2,750) Separation of Constellation 6 1,994 23 2,023 Amounts reclassified from AOCI — 14 — 14 Net current-period OCI — 14 — 14 Balance at March 31, 2022 — (713) — (713) OCI before reclassifications — 2 — 2 Amounts reclassified from AOCI — 10 — 10 Net current-period OCI — 12 — 12 Balance at June 30, 2022 — (701) — (701) Amounts reclassified from AOCI — 9 — 9 Net current-period OCI — 9 — 9 Balance at September 30, 2022 $ — $ (692) $ — $ (692) __________ (a) This AOCI component is included in the computation of net periodic pension and OPEB cost. Additionally, as of February 1, 2022, in connection with the separation, Exelon's pension and OPEB plans were remeasured. See Note 14 — Retirement Benefits of the 2022 Form 10-K and Note 8 — Retirement Benefits for additional information. See Exelon's Statements of Operations and Comprehensive Income for individual components of AOCI. The following table presents Income tax benefit (expense) allocated to each component of Exelon's Other comprehensive income (loss): Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Pension and non-pension postretirement benefit plans: Actuarial losses reclassified to periodic benefit cost $ (5) $ (3) $ (7) $ (11) Pension and non-pension postretirement benefit plans valuation adjustments 1 — 5 — Unrealized gains on cash flow hedges (7) — (11) —

Supplemental Financial Informat

Supplemental Financial Information (All Registrants)	9 Months Ended
Supplemental Financial Information (All Registrants)	Sep. 30, 2023
Supplemental Financial Information [Abstract]
Supplemental Financial Information (All Registrants)	Supplemental Financial Information (All Registrants) Supplemental Statement of Operations Information The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Operations and Comprehensive Income: Taxes other than income taxes Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2023 Utility taxes (a) $ 244 $ 82 $ 50 $ 23 $ 89 $ 82 $ 6 $ 1 Property 104 9 4 53 38 25 12 1 Payroll 31 8 4 5 7 2 1 1 Three Months Ended September 30, 2022 Utility taxes (a) $ 244 $ 84 $ 51 $ 22 $ 87 $ 79 $ 7 $ 1 Property 99 10 4 50 35 23 11 1 Payroll 28 7 5 4 7 2 1 — Nine Months Ended September 30, 2023 Utility taxes (a) $ 665 $ 228 $ 128 $ 73 $ 236 $ 213 $ 20 $ 3 Property 300 27 12 153 108 73 34 1 Payroll 93 22 13 14 22 5 3 3 Nine Months Ended September 30, 2022 Utility taxes (a) $ 667 $ 233 $ 126 $ 70 $ 238 $ 216 $ 19 $ 3 Property 287 30 12 142 103 70 31 2 Payroll 92 21 14 13 21 5 4 2 _________ (a) The Registrants' utility taxes represent municipal and state utility taxes and gross receipts taxes related to their operating revenues. The offsetting collection of utility taxes from customers is recorded in revenues in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. Other, Net Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2023 AFUDC — Equity $ 40 $ 7 $ 10 $ 4 $ 19 $ 15 $ 3 $ 1 Non-service net periodic benefit cost (18) — — — — — — — Three Months Ended September 30, 2022 AFUDC — Equity $ 38 $ 10 $ 7 $ 5 $ 16 $ 12 $ 2 $ 2 Non-service net periodic benefit cost 16 — — — — — — — Nine Months Ended September 30, 2023 AFUDC — Equity $ 113 $ 25 $ 22 $ 11 $ 55 $ 42 $ 7 $ 6 Non-service net periodic benefit cost (18) — — — — — — — Nine Months Ended September 30, 2022 AFUDC — Equity $ 112 $ 28 $ 22 $ 17 $ 45 $ 35 $ 5 $ 5 Non-service net periodic benefit cost 48 — — — — — — — Supplemental Cash Flow Information The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Cash Flows. Depreciation, amortization, and accretion Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2023 Property, plant, and equipment (b) $ 2,073 $ 815 $ 287 $ 381 $ 550 $ 232 $ 155 $ 145 Amortization of regulatory assets (b) 537 230 10 106 191 97 27 67 Amortization of intangible assets, net (b) 6 — — — — — — — Total depreciation and amortization $ 2,616 $ 1,045 $ 297 $ 487 $ 741 $ 329 $ 182 $ 212 Nine Months Ended September 30, 2022 Property, plant, and equipment (b) $ 2,024 $ 770 $ 267 $ 355 $ 502 $ 214 $ 141 $ 126 Amortization of regulatory assets (b) 532 212 10 115 195 98 31 66 Amortization of intangible assets, net (b) 10 — — — — — — — Amortization of energy contract assets and liabilities (c) 3 — — — — — — — Nuclear fuel (d) 66 — — — — — — — ARO accretion (e) 44 — — — — — — — Total depreciation, amortization, and accretion $ 2,679 $ 982 $ 277 $ 470 $ 697 $ 312 $ 172 $ 192 __________ (a) Exelon's 2022 amounts include amounts related to Generation prior to the separation. See Note 2 — Discontinued Operations for additional information. (b) Included in Depreciation and amortization in the Registrants' Consolidated Statements of Operations and Comprehensive Income. (c) Included in Electric operating revenues or Purchased power expense in Exelon’s Consolidated Statements of Operations and Comprehensive Income. (d) Included in Purchased fuel expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. (e) Included in Operating and maintenance expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. Other non-cash operating activities Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2023 Pension and OPEB costs (benefit) $ 152 $ 19 $ (10) $ 41 $ 74 $ 26 $ 13 $ 10 Allowance for credit losses 86 4 31 4 47 27 9 11 True-up adjustments to decoupling mechanisms and formula rates (b) (522) (405) (1) (47) (69) (28) (15) (26) Amortization of operating ROU asset 29 2 — 4 21 5 6 2 Change in environmental liabilities 37 — — — 37 37 — — AFUDC — Equity (113) (25) (22) (11) (55) (42) (7) (6) Nine Months Ended September 30, 2022 Pension and OPEB costs (benefit) $ 124 $ 45 $ (6) $ 34 $ 39 $ 6 $ 3 $ 9 Allowance for credit losses 130 40 32 18 42 21 9 12 Other decommissioning-related activity 36 — — — — — — — Energy-related options 60 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (92) (163) (1) 40 33 15 3 14 Long-term incentive plan 35 — — — — — — — Amortization of operating ROU asset 47 1 — 14 21 5 6 3 AFUDC — Equity (112) (28) (22) (17) (45) (35) (5) (5) __________ (a) Exelon's 2022 amounts include amounts related to Generation prior to the separation. See Note 2 — Discontinued Operations for additional information. (b) For ComEd, reflects the true-up adjustments in regulatory assets and liabilities associated with its distribution, energy efficiency, distributed generation, and transmission formula rates. For PECO, reflects the change in regulatory assets and liabilities associated with its transmission formula rates. For BGE, Pepco, DPL, and ACE, reflects the change in regulatory assets and liabilities associated with their decoupling mechanisms and transmission formula rates. See Note 3 — Regulatory Matters of the 2022 Form 10-K for additional information. The following tables provide a reconciliation of cash, cash equivalents, and restricted cash reported within the Registrants’ Consolidated Balance Sheets that sum to the total of the same amounts in their Consolidated Statements of Cash Flows. Cash, cash equivalents, and restricted cash Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at September 30, 2023 Cash and cash equivalents $ 300 $ 79 $ 43 $ 15 $ 121 $ 31 $ 5 $ 14 Restricted cash and cash equivalents 435 360 9 1 25 25 1 — Restricted cash included in Other deferred debits and other assets 212 212 — — — — — — Total cash, restricted cash, and cash equivalents $ 947 $ 651 $ 52 $ 16 $ 146 $ 56 $ 6 $ 14 Balance at December 31, 2022 Cash and cash equivalents $ 407 $ 67 $ 59 $ 43 $ 198 $ 45 $ 31 $ 72 Restricted cash and cash equivalents 566 327 9 24 175 54 121 — Restricted cash included in Other deferred debits and other assets 117 117 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,090 $ 511 $ 68 $ 67 $ 373 $ 99 $ 152 $ 72 Balance at September 30, 2022 Cash and cash equivalents $ 446 $ 63 $ 94 $ 20 $ 219 $ 21 $ 49 $ 112 Restricted cash and cash equivalents 744 342 9 130 234 77 157 — Restricted cash included in Other deferred debits and other assets 83 83 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,273 $ 488 $ 103 $ 150 $ 453 $ 98 $ 206 $ 112 Balance at December 31, 2021 Cash and cash equivalents $ 672 $ 131 $ 36 $ 51 $ 136 $ 34 $ 28 $ 29 Restricted cash and cash equivalents 321 210 8 4 77 34 43 — Restricted cash included in Other deferred debits and other assets 44 43 — — — — — — Cash, restricted cash, and cash equivalents from discontinued operations 582 — — — — — — — Total cash, restricted cash, and cash equivalents $ 1,619 $ 384 $ 44 $ 55 $ 213 $ 68 $ 71 $ 29 For additional information on restricted cash see Note 1 — Significant Accounting Policies of the 2022 Form 10-K. Supplemental Balance Sheet Information The following table provides additional information about material items recorded in the Registrants' Consolidated Balance Sheets. Accrued expenses Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at September 30, 2023 Compensation-related accruals (a) $ 548 $ 162 $ 67 $ 63 $ 99 $ 27 $ 17 $ 14 Taxes accrued 255 148 61 100 120 88 19 13 Interest accrued 391 78 52 59 81 38 24 17 Balance at December 31, 2022 Compensation-related accruals (a) $ 613 $ 179 $ 81 $ 79 $ 104 $ 29 $ 20 $ 16 Taxes accrued 211 92 10 34 70 52 8 12 Interest accrued 338 124 47 42 61 32 9 14 __________ (a) Primarily includes accrued payroll, bonuses and other incentives, vacation, and benefits.

Related Party Transactions (All

Related Party Transactions (All Registrants)	9 Months Ended
Related Party Transactions (All Registrants)	Sep. 30, 2023
Related Party Transactions [Abstract]
Related Party Transactions (All Registrants)	Related Party Transactions (All Registrants) Utility Registrants' expense with Generation The Utility Registrants incurred expenses from transactions with the Generation affiliate as described in the footnotes to the table below prior to separation on February 1, 2022. Such expenses were primarily recorded as Purchased power from affiliate and an immaterial amount recorded as Operating and maintenance expense from affiliates at the Utility Registrants. Effective February 1, 2022, Generation is no longer considered a related party. Nine Months Ended September 30, 2022 ComEd (a) $ 59 PECO (b) 33 BGE (c) 18 PHI 51 Pepco (d) 39 DPL (e) 10 ACE (f) 2 __________ (a) ComEd had an ICC-approved RFP contract with Generation to provide a portion of ComEd’s electric supply requirements. ComEd also purchased RECs and ZECs from Generation. (b) PECO received electric supply from Generation under contracts executed through PECO’s competitive procurement process. In addition, PECO had a ten-year agreement with Generation to sell solar AECs. (c) BGE received a portion of its energy requirements from Generation under its MDPSC-approved market-based SOS and gas commodity programs. (d) Pepco received electric supply from Generation under contracts executed through Pepco's competitive procurement process approved by the MDPSC and DCPSC. (e) DPL received a portion of its energy requirements from Generation under its MDPSC and DEPSC approved market-based SOS commodity programs. (f) ACE received electric supply from Generation under contracts executed through ACE's competitive procurement process approved by the NJBPU. Service Company Costs for Corporate Support The Registrants receive a variety of corporate support services from BSC. Pepco, DPL, and ACE also receive corporate support services from PHISCO. See Note 1 — Significant Accounting Policies for additional information regarding BSC and PHISCO. The following table presents the service company costs allocated to the Registrants: Operating and maintenance from affiliates Capitalized costs Three Months Ended September 30, Nine Months Ended September 30, Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 2023 2022 2023 2022 Exelon BSC $ 162 $ 156 $ 502 $ 500 PHISCO 25 20 74 60 ComEd BSC $ 92 $ 69 $ 263 $ 234 71 70 230 222 PECO BSC 55 44 160 140 29 24 89 80 BGE BSC 58 46 166 148 23 26 69 86 PHI BSC 50 39 135 135 39 36 114 112 PHISCO — — — — 24 20 73 60 Pepco BSC 30 24 85 80 13 13 41 41 PHISCO 31 28 91 86 9 8 30 24 DPL BSC 19 16 54 51 12 11 32 34 PHISCO 24 24 73 73 7 7 22 20 ACE BSC 16 13 45 42 13 12 39 37 PHISCO 23 20 67 63 7 5 20 16 Current Receivables from/Payables to affiliates The following tables present current Receivables from affiliates and current Payables to affiliates: September 30, 2023 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 57 $ — $ 5 $ 62 PECO $ — — — — — 31 — 6 37 BGE — — — — — 31 — 2 33 PHI — — — — — — 6 — 11 17 Pepco — — — — — 16 15 1 32 DPL — 1 — — — 13 11 — 25 ACE — — — — — 11 10 1 22 Other 3 — — — — 3 (1) 1 6 Total $ 3 $ 1 $ — $ — $ — $ 3 $ 164 $ 37 $ 26 $ 234 December 31, 2022 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 66 $ — $ 8 $ 74 PECO $ — — — — — 39 — 3 42 BGE — — — — — 38 — 1 39 PHI — — — — — — 4 — 10 14 Pepco — — — — — 20 13 1 34 DPL — 2 — — — 12 8 — 22 ACE — 2 — — — 14 9 1 26 Other 3 — — — — 1 — — 4 Total $ 3 $ 4 $ — $ — $ — $ 1 $ 193 $ 30 $ 24 $ 255 Borrowings from Exelon/PHI intercompany money pool To provide an additional short-term borrowing option that will generally be more favorable to the borrowing participants than the cost of external financing both Exelon and PHI operate an intercompany money pool. PECO and PHI Corporate participate in the Exelon intercompany money pool. Pepco, DPL, and ACE participate in the PHI intercompany money pool. Long-term debt to financing trusts The following table presents Long-term debt to financing trusts: September 30, 2023 December 31, 2022 Exelon ComEd PECO Exelon ComEd PECO ComEd Financing III $ 206 $ 205 $ — $ 206 $ 205 $ — PECO Trust III 81 — 81 81 — 81 PECO Trust IV 103 — 103 103 — 103 Total $ 390 $ 205 $ 184 $ 390 $ 205 $ 184

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2023
Accounting Policies [Abstract]
Description of Business and Basis of Presentation (All Registrants)	Description of Business Exelon is a utility services holding company engaged in the energy transmission and distribution businesses through ComEd, PECO, BGE, Pepco, DPL, and ACE. On February 21, 2021, Exelon's Board of Directors approved a plan to separate the Utility Registrants and Generation. The separation was completed on February 1, 2022, creating two publicly traded companies, Exelon and Constellation. See Note 2 — Discontinued Operations for additional information. Name of Registrant Business Service Territories Commonwealth Edison Company Purchase and regulated retail sale of electricity Northern Illinois, including the City of Chicago Transmission and distribution of electricity to retail customers PECO Energy Company Purchase and regulated retail sale of electricity and natural gas Southeastern Pennsylvania, including the City of Philadelphia (electricity) Transmission and distribution of electricity and distribution of natural gas to retail customers Pennsylvania counties surrounding the City of Philadelphia (natural gas) Baltimore Gas and Electric Company Purchase and regulated retail sale of electricity and natural gas Central Maryland, including the City of Baltimore (electricity and natural gas) Transmission and distribution of electricity and distribution of natural gas to retail customers Pepco Holdings LLC Utility services holding company engaged, through its reportable segments Pepco, DPL, and ACE Service Territories of Pepco, DPL, and ACE Potomac Electric Purchase and regulated retail sale of electricity District of Columbia, and major portions of Montgomery and Prince George’s Counties, Maryland Transmission and distribution of electricity to retail customers Delmarva Power & Purchase and regulated retail sale of electricity and natural gas Portions of Delaware and Maryland (electricity) Transmission and distribution of electricity and distribution of natural gas to retail customers Portions of New Castle County, Delaware (natural gas) Atlantic City Electric Company Purchase and regulated retail sale of electricity Portions of Southern New Jersey Transmission and distribution of electricity to retail customers Basis of Presentation This is a combined quarterly report of all Registrants. The Notes to the Consolidated Financial Statements apply to the Registrants as indicated parenthetically next to each corresponding disclosure. When appropriate, the Registrants are named specifically for their related activities and disclosures. Each of the Registrant’s Consolidated Financial Statements includes the accounts of its subsidiaries. All intercompany transactions have been eliminated, except for the historical transactions between the Utility Registrants and Generation for the purposes of presenting discontinued operations in all periods presented in the Consolidated Statements of Operations and Comprehensive Income. Through its business services subsidiary, BSC, Exelon provides its subsidiaries with a variety of support services at cost, including legal, human resources, financial, information technology, and supply management services. PHI also has a business services subsidiary, PHISCO, which provides a variety of support services at cost, including legal, finance, engineering, customer operations, distribution and transmission planning, asset management, system operations, and power procurement, to PHI operating companies. The costs of BSC and PHISCO are directly charged or allocated to the applicable subsidiaries. The results of Exelon’s corporate operations are presented as “Other” in the consolidated financial statements and include intercompany eliminations unless otherwise disclosed. The accompanying consolidated financial statements as of September 30, 2023 and for the three and nine months ended September 30, 2023 and 2022 are unaudited but, in the opinion of each Registrant's management, the Registrants include all adjustments that are considered necessary for a fair statement of the Registrants’ respective financial statements in accordance with GAAP. All adjustments are of a normal, recurring nature, except as otherwise disclosed. The December 31, 2022 Consolidated Balance Sheets were derived from audited financial statements. The interim financial statements are to be read in conjunction with prior annual financial statements and notes. Additionally, financial results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the fiscal year ending December 31, 2023. These Combined Notes to Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the SEC for Quarterly Reports on Form 10-Q. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The separation of Constellation, including Generation and its subsidiaries, met the criteria for discontinued operations and as such, results of operations are presented as discontinued operations and have been excluded from continuing operations for all periods presented. Accounting rules require that certain BSC costs previously allocated to Generation be presented as part of Exelon’s continuing operations as these costs do not qualify as expenses of the discontinued operations. Comprehensive income, shareholders' equity, and cash flows related to Constellation have not been segregated and are included in the Consolidated Statements of Operations and Comprehensive Income, Consolidated Statements of Changes in Shareholders’ Equity, and Consolidated Statements of Cash Flows, respectively, for the nine months ended September 30, 2022. See Note 2 — Discontinued Operations for additional information.

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
Discontinued Operations (Tables)	Sep. 30, 2023
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations - Income Statement	The following table presents the results of Constellation that have been reclassified from continuing operations and included in discontinued operations within Exelon’s Consolidated Statements of Operations and Comprehensive Income for the nine months ended September 30, 2022. These results are primarily Generation, which is comprised of Exelon’s Mid-Atlantic, Midwest, New York, ERCOT, and Other Power Regions reportable segments, and include the impact of transaction costs, certain BSC costs, including any transition costs, that were historically allocated and directly attributable to Generation, transactions between Generation and the Utility Registrants, and tax-related adjustments. Transaction costs include costs for external bankers, accountants, appraisers, lawyers, external counsels and other advisors, among others, who are involved in the negotiation, appraisal, due diligence and regulatory approval of the separation. Transition costs are primarily employee-related costs such as recruitment expenses, costs to establish certain stand-alone functions and information technology systems, professional services fees and other separation-related costs during the transition to separate Generation. For the purposes of reporting discontinued operations, these results also include transactions between Generation and the Utility Registrants that were historically eliminated within Exelon’s Consolidated Statements of Operations as these transactions will be ongoing after the separation. Certain BSC costs that were historically allocated to Generation are presented as part of continuing operations in Exelon’s Consolidated Statements of Operations as these costs do not qualify as expenses of the discontinued operations per the accounting rules. Nine Months Ended 2022 Operating revenues Competitive business revenues $ 1,855 Competitive business revenues from affiliates 161 Total operating revenues 2,016 Operating expenses Competitive businesses purchased power and fuel 1,138 Operating and maintenance (a) 371 Depreciation and amortization 94 Taxes other than income taxes 44 Total operating expenses 1,647 Gain on sales of assets and businesses 10 Operating income 379 Other income and (deductions) Interest expense, net (20) Other, net (281) Total other income and (deductions) (301) Income before income taxes 78 Income taxes (40) Equity in losses of unconsolidated affiliates (1) Net income 117 Net income attributable to noncontrolling interests 1 Net income from discontinued operations $ 116 __________ (a) Includes transaction and transition costs related to the separation of $52 million for the nine months ended September 30, 2022.
Discontinued Operations - Cash Flows	The following table presents selected financial information regarding cash flows of the discontinued operations that are included within Exelon’s Consolidated Statements of Cash Flows for the nine months ended September 30, 2022. Nine Months Ended 2022 Non-cash items included in net income from discontinued operations: Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization $ 207 Loss on sales of assets and businesses 9 Deferred income taxes and amortization of investment tax credits (143) Net fair value changes related to derivatives (59) Net realized and unrealized losses on NDT fund investments 205 Net unrealized losses on equity investments 16 Other decommissioning-related activity 36 Cash flows from investing activities: Capital expenditures (227) Collection of DPP 169 Supplemental cash flow information: Decrease in capital expenditures not paid (128) Increase in DPP 348 Increase in PP&E related to ARO update 335

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
Regulatory Matters (Tables)	Sep. 30, 2023
Regulated Operations [Abstract]
Public Utilities Distribution Rate Cases [Table Text Block]	The following tables show the completed and pending distribution base rate case proceedings in 2023. Completed Distribution Base Rate Case Proceedings Registrant/Jurisdiction Filing Date Service Requested Revenue Requirement Increase Approved Revenue Requirement Increase Approved ROE Approval Date Rate Effective Date ComEd - Illinois (a) April 15, 2022 Electric $ 199 $ 199 7.85 % November 17, 2022 January 1, 2023 PECO - Pennsylvania March 31, 2022 Natural Gas 82 55 N/A (b) October 27, 2022 January 1, 2023 BGE - Maryland (c) May 15, 2020 (amended September 11, 2020) Electric 203 140 9.50 % December 16, 2020 January 1, 2021 Natural Gas 108 74 9.65 % Pepco - Maryland (d) October 26, 2020 (amended March 31, 2021) Electric 104 52 9.55 % June 28, 2021 June 28, 2021 DPL - Maryland (e) May 19, 2022 Electric 38 29 9.60 % December 14, 2022 January 1, 2023 __________ (a) ComEd's 2023 approved revenue requirement above reflects an increase of $144 million for the initial year revenue requirement for 2023 and an increase of $55 million related to the annual reconciliation for 2021. The revenue requirement for 2023 provides for a weighted average debt and equity return on distribution rate base of 5.94%, inclusive of an allowed ROE of 7.85%, reflecting the monthly average yields for 30-year treasury bonds plus 580 basis points. The reconciliation revenue requirement for 2021 provides for a weighted average debt and equity return on distribution rate base of 5.91%, inclusive of an allowed ROE of 7.78%, reflecting the monthly yields on 30-year treasury bonds plus 580 basis points less a performance metrics penalty of 7 basis points. This is ComEd's last performance-based electric distribution formula rate established under EIMA. See discussion of CEJA below for details on the transition away from the electric distribution formula rate. (b) The PECO natural gas base rate case proceeding was resolved through a settlement agreement, which did not specify an approved ROE. (c) Reflects a three-year cumulative multi-year plan for 2021 through 2023. BGE proposed to use certain tax benefits to fully offset the increases in 2021 and 2022 and partially offset the increase in 2023. The MDPSC awarded BGE electric revenue requirement increases of $59 million, $39 million, and $42 million, before offsets, in 2021, 2022, and 2023, respectively, and natural gas revenue requirement increases of $53 million, $11 million, and $10 million, before offsets, in 2021, 2022, and 2023, respectively. However, the MDPSC utilized the tax benefits to fully offset the increases in 2021 and January 2022 such that customer rates remained unchanged. For the remainder of 2022, the MDPSC chose to offset only 25% of the cumulative 2021 and 2022 electric revenue requirement increases and 50% of the cumulative gas revenue requirement increases. In 2021, the MDPSC deferred a decision on whether to use certain tax benefits to offset the revenue requirement increases in 2023 and directed BGE to make another proposal at the end of 2022. In September 2022, BGE proposed that tax benefits not be used to offset the 2023 revenue requirement increases. On October 26, 2022, the MDPSC accepted BGE's recommendation to not use tax benefits to offset the 2023 revenue requirement increases. (d) Reflects a three-year cumulative multi-year plan for April 1, 2021 through March 31, 2024. The MDPSC awarded Pepco electric incremental revenue requirement increases of $21 million, $16 million, and $15 million, before offsets, for the 12-month periods ending March 31, 2022, 2023, and 2024, respectively. Pepco proposed to utilize certain tax benefits to fully offset the increase through 2023 and partially offset customer rate increases in 2024. However, the MDPSC only utilized the acceleration of refunds for certain tax benefits to fully offset the increases such that customer rates remain unchanged through March 31, 2022. On February 23, 2022, the MDPSC chose to offset 25% of the cumulative revenue requirement increase for the 12-month period ending March 31, 2023. In 2021, the MDPSC deferred a decision on whether to use certain tax benefits to offset the revenue requirement increases for the 12-month period ending March 31, 2024. In December 2022 Pepco proposed that tax benefits not be used to offset the revenue requirement increases for this period. On January 25, 2023, the MDPSC accepted Pepco’s recommendations not to use tax benefits to offset revenue requirement increases for the 12-month period ending March 31, 2024. (e) Reflects a three-year cumulative multi-year plan for January 1, 2023 through December 31, 2025. The MDPSC awarded DPL electric incremental revenue requirement increases of $17 million, $6 million, and $6 million for 2023, 2024, and 2025, respectively. Pending Distribution Base Rate Case Proceedings Registrant/Jurisdiction Filing Date Service Requested Revenue Requirement Increase Requested ROE Expected Approval Timing ComEd - Illinois (a) January 17, 2023 Electric $ 1,487 10.50% to 10.65% Fourth quarter of 2023 ComEd - Illinois (b) April 21, 2023 Electric 247 8.91% Fourth quarter of 2023 BGE - Maryland (c) February 17, 2023 Electric 313 10.40% Fourth quarter of 2023 Natural Gas 289 10.40% Pepco - District of Columbia (d) April 13, 2023 Electric 191 10.50% Second quarter of 2024 Pepco - Maryland (e) May 16, 2023 Electric 214 10.50% Second quarter of 2024 DPL - Delaware (f) December 15, 2022 (amended September 29, 2023) Electric 39 10.50% Second quarter of 2024 ACE - New Jersey (g) February 15, 2023 (amended August 21, 2023) Electric 92 10.50% Fourth quarter of 2023 __________ (a) On September 27, 2023, ComEd filed its reply brief supporting its proposed multi-year rate and grid plans, as adjusted or modified by ComEd as of the evidentiary hearing on August 22, 2023. The rate plan covers the period from January 1, 2024 to December 31, 2027 and includes total requested revenue requirement increases of $968 million effective January 1, 2024, $181 million effective January 1, 2025, $163 million effective January 1, 2026, and $175 million effective January 1, 2027, based on forecasted revenue requirements. If approved, the revenue requirement will provide for a weighted average debt and equity return on distribution rate base of 7.40% in 2024, 7.47% in 2025, 7.58% in 2026, and 7.65% in 2027, inclusive of an allowed ROE of 10.50% in 2024, 10.55% in 2025, 10.60% in 2026, and 10.65% in 2027. The requested revenue requirements are based on capital structures that reflect between 50.58% and 51.19% common equity. ComEd’s MRP also includes a proposed three-tranche rate phase-in to defer approximately $339 million, of the $968 million year-over-year revenue increase for 2024 from 2024 to 2026, approximately $52 million, of the $520 million year-over-year revenue increase for 2025 from 2025 to 2027, and approximately $75 million of the $215 million year-over-year revenue increase for 2026 from 2026 to 2028. (b) On April 21, 2023, ComEd filed its proposed Delivery Reconciliation Amount of $247 million un der Rider Delivery Service Pricing Reconciliation (Rider DSPR) which allows for the reconciliation of the revenue requirement in effect in the final years in which formula rates are determined and until such time as new rates are established under ComEd’s approved MRP. The 2023 filing reconciles the delivery service rates in effect in 2022 with the actual delivery service costs incurred in 2022. Final order is expected by December 2023, and the reconciliation amount will be in customer rates beginning January 1, 2024. (c) Reflects a three-year cumulative multi-year plan for January 1, 2024 through December 31, 2026 submitted to the MDPSC. Inclusive of the proposed acceleration of remaining electric tax benefits in 2024 and 2025, and remaining gas tax benefits in 2024, BGE requested total electric revenue requirement increases of $85 million, $103 million, and $125 million in 2024, 2025, and 2026, respectively, and natural gas revenue requirement increases of $158 million, $77 million, and $54 million in 2024, 2025, and 2026, respectively. Requested revenue requirement increases will be used to recover capital investments designed to increase the resilience of the electric and gas distribution systems and support Maryland’s climate and regulatory initiatives. The 2021 and 2022 reconciliation amounts are not included in the requested revenue requirement increase, as BGE is proposing that these amounts be recovered through the separate electric and gas riders in 2024. The 2021 reconciliation amounts are $11 million and $7 million for electric and gas, respectively, and the 2022 reconciliation amounts are $44 million and $15 million for electric and gas, respectively. The requested electric revenue requirement includes approximately $25 million for a Customer Electrification Plan that the MDPSC struck from BGE's case in August 2023. (d) Reflects a three-year cumulative multi-year plan for January 1, 2024 through December 31, 2026 submitted to the DCPSC. Pepco requested total electric revenue requirement increases of $117 million, $37 million, and $37 million in 2024, 2025, and 2026, respectively. Requested revenue requirement increases will be used to recover capital investments designed to advance system-readiness and support the District of Columbia’s climate and clean energy goals. (e) Reflects a three-year cumulative multi-year plan for April 1, 2024 through March 31, 2027 submitted to the MDPSC. Pepco requested total electric revenue requirement increases of $74 million, $60 million and $60 million effective April 1, 2024, April 1, 2025, and April 1, 2026, respectively. The plan contains a proposed nine-month extension period with a requested revenue requirement increase of $20 million effective April 1, 2027 through December 31, 2027. Requested revenue requirement increases will be used to recover capital investments designed to advance system-readiness and support Maryland's climate and clean energy goals. On August 7, 2023, the MDPSC issued an order approving a settlement agreement which allows Pepco to establish a revenue deferral mechanism to recover its full Commission-authorized year 1 increase between July 1, 2024 through March 31, 2025 and extend the procedural schedule to address intervenor resource constraints. (f) The rates went into effect on July 15, 2023, subject to refund. (g) Requested increases are before New Jersey sales and use tax. ACE’s procedural schedule was suspended on September 6, 2023. On October 21, 2023, ACE filed a stipulation of settlement with the NJBPU. Subsequently, on October 24, 2023, the administrative law judge presiding over the case recommended the settlement with all parties be approved. ACE is awaiting final approval of the settlement from the NJBPU and it is expected during the fourth quarter of 2023.
Public Utilities Transmission Rate Filings [Table Text Block]	For 2023, the following increases/(decreases) were included in the Utility Registrants' electric transmission formula rate updates: Registrant (a) Initial Revenue Requirement Increase Annual Reconciliation Increase (Decrease) Total Revenue Requirement Increase Allowed Return on Rate Base (b) Allowed ROE (c) ComEd $ 20 $ 63 $ 83 8.09 % 11.50 % PECO 24 23 47 7.41 % 10.35 % BGE 19 (12) 4 (d) 7.34 % 10.50 % Pepco 37 (5) 32 7.57 % 10.50 % DPL 32 (3) 29 7.08 % 10.50 % ACE 41 (12) 29 7.08 % 10.50 % __________ (a) All rates are effective June 1, 2023 - May 31, 2024, subject to review by interested parties pursuant to review protocols of each Utility Registrants' tariffs. (b) Represents the weighted average debt and equity return on transmission rate bases. For ComEd and PECO, the common equity component of the ratio used to calculate the weighted average debt and equity return on the transmission formula rate base is currently capped at 55% and 55.75%, respectively. (c) The rate of return on common equity for each Utility Registrant includes a 50-basis-point incentive adder for being a member of a RTO.
Public Utilities Energy Efficiency Revenue [Table Text Block]	ComEd filed its annual energy efficiency formula rate update with the ICC on May 26, 2023. The filing establishes the revenue requirement used to set the rates that will take effect in January 2024 after the ICC's review and approval. The requested revenue requirement update is based on a reconciliation of the 2022 actual costs plus projected 2024 expenditures. Initial Revenue Requirement Increase Annual Reconciliation Increase Total Revenue Requirement Increase Requested Return on Rate Base (a) Requested ROE $ 87 $ 31 $ 118 6.48 % 8.91 % __________
Capitalized Ratemaking Amounts Not Recognized [Table Text Block]	The following table presents authorized amounts capitalized for ratemaking purposes related to earnings on shareholders' investment that are not recognized for financial reporting purposes in the Registrants' Consolidated Balance Sheets. These amounts will be recognized as revenues in the related Consolidated Statements of Operations and Comprehensive Income in the periods they are billable to the Utility Registrants' customers. PECO had no related amounts at September 30, 2023 and December 31, 2022. Exelon ComEd (a) BGE (b) PHI Pepco (c) DPL (c) ACE (b) September 30, 2023 $ 81 $ 25 $ 21 $ 35 $ 27 $ 1 $ 7 December 31, 2022 57 8 28 21 18 2 1 __________ (a) Reflects ComEd's unrecognized equity returns earned for ratemaking purposes on its energy efficiency and electric distribution formula rate regulatory assets. (b) BGE's and ACE's authorized amounts capitalized for ratemaking purposes primarily relate to earnings on shareholder's investment on their respective AMI programs. (c) Pepco's and DPL's authorized amounts capitalized for ratemaking purposes relate to earnings on shareholder's investment on their respective AMI Programs and Energy Efficiency and Demand Response Programs, and for Pepco District of Columbia revenue decoupling program. The earnings on energy efficiency are on Pepco District of Columbia and DPL Delaware programs only.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
Revenue from Contracts with Customers (Tables)	Sep. 30, 2023
Revenue from Contract with Customer [Abstract]
Change in Contract with Customer, Asset and Liability	The following table provides a rollforward of the contract liabilities reflected in Exelon's, PHI's, Pepco's, DPL's, and ACE's Consolidated Balance Sheets for the three and nine months ended September 30, 2023 and 2022. At September 30, 2023 and December 31, 2022, ComEd's, PECO's, and BGE's contract liabilities were immaterial. Exelon (a) PHI (a) Pepco (a) DPL ACE (a) Balance at December 31, 2022 $ 101 $ 101 $ 81 $ 10 $ 10 Revenues recognized (1) (1) (1) — — Balance at March 31, 2023 100 100 80 10 10 Revenues recognized (2) (2) (2) — — Balance at June 30, 2023 $ 98 $ 98 $ 78 $ 10 $ 10 Revenues recognized (2) (2) (1) — (1) Balance as of September 30, 2023 $ 96 $ 96 $ 77 $ 10 $ 9 Exelon (a) PHI (a) Pepco (a) DPL (a) ACE (a) Balance at December 31, 2021 $ 109 $ 109 $ 87 $ 11 $ 11 Revenues recognized (2) (2) (2) — — Balance at March 31, 2022 107 107 85 11 11 Revenues recognized (2) (2) (1) — (1) Balance at June 30, 2022 $ 105 $ 105 $ 84 $ 11 $ 10 Revenues recognized (2) (2) (1) (1) — Balance as of September 30, 2022 $ 103 $ 103 $ 83 $ 10 $ 10 __________ (a) Revenues recognized in the three and nine months ended September 30, 2023 and 2022, were included in the contract liabilities at December 31, 2022 and 2021, respectively.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	The following table shows the amounts of future revenues expected to be recorded in each year for performance obligations that are unsatisfied or partially unsatisfied as of September 30, 2023. This disclosure only includes contracts for which the total consideration is fixed and determinable at contract inception. The average contract term varies by customer type and commodity but ranges from one month to several years. This disclosure excludes the Utility Registrants' gas and electric tariff sales contracts and transmission revenue contracts as they generally have an original expected duration of one year or less and, therefore, do not contain any future, unsatisfied performance obligations to be included in this disclosure. Year Exelon PHI Pepco DPL ACE 2023 $ 2 $ 2 $ 2 $ — $ 1 2024 6 6 5 — — 2025 5 5 5 — — 2026 5 5 5 — — 2027 and thereafter 78 78 60 10 8 Total $ 96 $ 96 $ 77 $ 10 $ 9

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
Segment Information (Tables)	Sep. 30, 2023
Segment Reporting [Abstract]
Analysis and reconciliation of reportable segment information	An analysis and reconciliation of the Registrants’ reportable segment information to the respective information in the consolidated financial statements for the three and nine months ended September 30, 2023 and 2022 is as follows: Three Months Ended September 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 2,268 $ 970 $ 836 $ 1,747 $ — $ (28) $ 5,793 Natural gas revenues — 67 96 24 — — 187 Shared service and other revenues — — — 2 445 (447) — Total operating revenues $ 2,268 $ 1,037 $ 932 $ 1,773 $ 445 $ (475) $ 5,980 2022 Electric revenues $ 1,378 $ 941 $ 757 $ 1,557 $ — $ (12) $ 4,621 Natural gas revenues — 73 113 38 — — 224 Shared service and other revenues — — — 3 381 (384) — Total operating revenues $ 1,378 $ 1,014 $ 870 $ 1,598 $ 381 $ (396) $ 4,845 Intersegment revenues (c) : 2023 $ 9 $ 2 $ 2 $ 2 $ 443 $ (458) $ — 2022 6 3 3 3 378 (393) — Depreciation and amortization: 2023 $ 357 $ 100 $ 161 $ 257 $ 15 $ — $ 890 2022 333 92 148 238 14 — 825 Operating expenses: 2023 $ 1,738 $ 847 $ 835 $ 1,440 $ 475 $ (478) $ 4,857 2022 913 798 810 1,254 439 (380) 3,834 Interest expense, net: 2023 $ 119 $ 52 $ 47 $ 80 $ 139 $ — $ 437 2022 104 45 39 72 105 — 365 Income (loss) from continuing operations before income taxes: 2023 $ 427 $ 149 $ 56 $ 281 $ (130) $ (16) $ 767 2022 375 179 26 291 (103) — 768 Income Taxes: 2023 $ 94 $ 3 $ 11 $ 49 $ (90) $ — $ 67 2022 84 44 (7) 2 (31) — 92 Net income (loss) from continuing operations: 2023 $ 333 $ 146 $ 45 $ 232 $ (41) $ (15) $ 700 2022 291 135 33 289 (71) (1) 676 Capital Expenditures: 2023 $ 664 $ 361 $ 330 $ 488 $ 12 $ — $ 1,855 2022 593 333 340 398 8 — 1,672 __________ (a) Other primarily includes Exelon’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 16 — Related Party Transactions for additional information on intersegment revenues. PHI : Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2023 Electric revenues $ 822 $ 426 $ 502 $ — $ (3) $ 1,747 Natural gas revenues — 24 — — — 24 Shared service and other revenues — — — 103 (101) 2 Total operating revenues $ 822 $ 450 $ 502 $ 103 $ (104) $ 1,773 2022 Electric revenues $ 724 $ 374 $ 462 $ — $ (3) $ 1,557 Natural gas revenues — 38 — — — 38 Shared service and other revenues — — — 94 (91) 3 Total operating revenues $ 724 $ 412 $ 462 $ 94 $ (94) $ 1,598 Intersegment revenues (c) : 2023 $ 1 $ 2 $ — $ 103 $ (104) $ 2 2022 2 1 — 94 (94) 3 Depreciation and amortization: 2023 $ 112 $ 62 $ 77 $ 6 $ — $ 257 2022 99 59 74 6 — 238 Operating expenses: 2023 $ 658 $ 386 $ 394 $ 105 $ (103) $ 1,440 2022 555 345 353 96 (95) 1,254 Interest expense, net: 2023 $ 41 $ 18 $ 19 $ 3 $ (1) $ 80 2022 37 16 17 1 1 72 Income (loss) before income taxes: 2023 $ 141 $ 51 $ 94 $ (4) $ (1) $ 281 2022 146 54 95 (4) — 291 Income Taxes: 2023 $ 21 $ 8 $ 23 $ (3) $ — $ 49 2022 1 2 1 (2) — 2 Net income (loss): 2023 $ 120 $ 43 $ 71 $ (2) $ — $ 232 2022 145 52 94 (2) — 289 Capital Expenditures: 2023 $ 227 $ 158 $ 101 $ 2 $ — $ 488 2022 193 100 105 — — 398 _________ (a) Other primarily includes PHI’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon. Nine Months Ended September 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 5,836 $ 2,484 $ 2,322 $ 4,459 $ — $ (45) $ 15,056 Natural gas revenues — 493 664 150 — (3) 1,304 Shared service and other revenues — — — 6 1,316 (1,322) — Total operating revenues $ 5,836 $ 2,977 $ 2,986 $ 4,615 $ 1,316 $ (1,370) $ 16,360 2022 Electric revenues $ 4,536 $ 2,390 $ 2,122 $ 4,058 $ — $ (24) $ 13,082 Natural gas revenues — 487 688 157 — (2) 1,330 Shared service and other revenues — — — 8 1,342 (1,350) — Total operating revenues $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,342 $ (1,376) $ 14,412 Intersegment revenues (c) : 2023 $ 14 $ 6 $ 6 $ 7 $ 1,310 $ (1,343) $ — 2022 14 5 13 9 1,342 (1,377) 6 Depreciation and amortization: 2023 $ 1,045 $ 297 $ 487 $ 741 $ 46 $ — $ 2,616 2022 982 277 470 697 46 — 2,472 Operating expenses: 2023 $ 4,472 $ 2,436 $ 2,503 $ 3,864 $ 1,521 $ (1,367) $ 13,429 2022 3,357 2,230 2,446 3,535 1,524 (1,288) 11,804 Interest expense, net: 2023 $ 357 $ 149 $ 135 $ 238 $ 402 $ (4) $ 1,277 2022 308 129 110 216 300 — 1,063 Income (loss) from continuing operations before income taxes: 2023 $ 1,057 $ 418 $ 362 $ 593 $ (424) $ (21) $ 1,985 2022 909 541 270 528 (228) (42) 1,978 Income taxes: 2023 $ 235 $ 8 $ 76 $ 103 $ (149) $ 1 $ 274 2022 203 67 3 10 82 (9) 356 Net income (loss) from continuing operations: 2023 $ 822 $ 410 $ 286 $ 490 $ (275) $ (22) $ 1,711 2022 706 474 267 518 (310) (33) 1,622 Capital expenditures: 2023 $ 1,926 $ 1,068 $ 986 $ 1,510 $ 50 $ — $ 5,540 2022 1,801 991 918 1,174 68 — 4,952 Total assets: September 30, 2023 $ 42,042 $ 15,259 $ 13,649 $ 26,656 $ 5,825 $ (4,172) $ 99,259 December 31, 2022 39,661 14,502 13,350 26,082 6,014 (4,260) 95,349 __________ (a) Other primarily includes Exelon’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 16 — Related Party Transactions for additional information on intersegment revenues. PHI: Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2023 Electric revenues $ 2,174 $ 1,123 $ 1,172 $ 1 $ (11) $ 4,459 Natural gas revenues — 150 — — — 150 Shared service and other revenues — — — 309 (303) 6 Total operating revenues $ 2,174 $ 1,273 $ 1,172 $ 310 $ (314) $ 4,615 2022 Electric revenues $ 1,919 $ 1,019 $ 1,120 $ — $ — $ 4,058 Natural gas revenues — 157 — — — 157 Shared service and other revenues — — — 298 (290) 8 Total operating revenues $ 1,919 $ 1,176 $ 1,120 $ 298 $ (290) $ 4,223 Intersegment revenues (c) : 2023 $ 5 $ 5 $ 1 $ 309 $ (313) $ 7 2022 4 5 2 288 (290) 9 Depreciation and amortization: 2023 $ 329 $ 182 $ 212 $ 18 $ — $ 741 2022 312 172 192 21 — 697 Operating expenses: 2023 $ 1,810 $ 1,079 $ 971 $ 318 $ (314) $ 3,864 2022 1,588 999 947 291 (290) 3,535 Interest expense, net: 2023 $ 122 $ 53 $ 52 $ 9 $ 2 $ 238 2022 111 48 49 7 1 216 Income (loss) before income taxes: 2023 $ 292 $ 153 $ 162 $ (14) $ — $ 593 2022 259 138 133 (2) — 528 Income taxes: 2023 $ 43 $ 25 $ 40 $ (5) $ — $ 103 2022 (2) 8 2 2 — 10 Net income (loss): 2023 $ 249 $ 128 $ 122 $ (9) $ — $ 490 2022 261 130 131 (4) — 518 Capital expenditures: 2023 $ 710 $ 416 $ 376 $ 8 $ — $ 1,510 2022 595 294 284 1 — 1,174 Total assets: September 30, 2023 $ 11,061 $ 5,870 $ 5,155 $ 4,644 $ (74) $ 26,656 December 31, 2022 10,657 5,802 4,979 4,677 (33) 26,082 __________ (a) Other primarily includes PHI’s corporate operations, shared service entities, and other financing and investment activities. (b) Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in Taxes other than income taxes in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 15 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon.
Schedule of Revenue by Major Customers by Reporting Segments	The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Three Months Ended September 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 1,047 $ 654 $ 512 $ 959 $ 405 $ 255 $ 299 Small commercial & industrial 540 148 86 199 54 70 75 Large commercial & industrial 263 67 144 386 303 32 51 Public authorities & electric railroads 11 7 7 16 9 3 4 Other (a) 265 80 104 201 67 67 68 Total electric revenues (b) $ 2,126 $ 956 $ 853 $ 1,761 $ 838 $ 427 $ 497 Natural gas revenues Residential $ — $ 43 $ 57 $ 12 $ — $ 12 $ — Small commercial & industrial — 16 10 7 — 7 — Large commercial & industrial — — 25 1 — 1 — Transportation — 7 — 3 — 3 — Other (c) — 1 4 1 — 1 — Total natural gas revenues (d) $ — $ 67 $ 96 $ 24 $ — $ 24 $ — Total revenues from contracts with customers $ 2,126 $ 1,023 $ 949 $ 1,785 $ 838 $ 451 $ 497 Other revenues Revenues from alternative revenue programs $ 135 $ 11 $ (22) $ (15) $ (18) $ (2) $ 5 Other electric revenues (e) 7 3 4 3 2 1 — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ 142 $ 14 $ (17) $ (12) $ (16) $ (1) $ 5 Total revenues for reportable segments $ 2,268 $ 1,037 $ 932 $ 1,773 $ 822 $ 450 $ 502 Three Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 935 $ 620 $ 406 $ 808 $ 318 $ 207 $ 283 Small commercial & industrial 217 149 88 179 44 65 70 Large commercial & industrial (117) 93 158 401 303 43 55 Public authorities & electric railroads 3 8 7 16 9 4 3 Other (a) 246 71 101 166 57 55 54 Total electric revenues (b) $ 1,284 $ 941 $ 760 $ 1,570 $ 731 $ 374 $ 465 Natural gas revenues Residential $ — $ 46 $ 70 $ 10 $ — $ 10 $ — Small commercial & industrial — 20 13 6 — 6 — Large commercial & industrial — — 28 3 — 3 — Transportation — 5 — 3 — 3 — Other (c) — 2 2 16 — 16 — Total natural gas revenues (d) $ — $ 73 $ 113 $ 38 $ — $ 38 $ — Total revenues from contracts with customers $ 1,284 $ 1,014 $ 873 $ 1,608 $ 731 $ 412 $ 465 Other revenues Revenues from alternative revenue programs $ 88 $ (5) $ (8) $ (11) $ (8) $ — $ (3) Other electric revenues (e) 6 5 4 1 1 — — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ 94 $ — $ (3) $ (10) $ (7) $ — $ (3) Total revenues for reportable segments $ 1,378 $ 1,014 $ 870 $ 1,598 $ 724 $ 412 $ 462 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2023 and 2022 respectively of: • $9 million, $6 million at ComEd • $2 million, $3 million at PECO • $1 million, $2 million at BGE • $2 million, $3 million at PHI • $1 million, $2 million at Pepco • $2 million, $1 million at DPL • less than $1 million, less than $1 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2023 and 2022 of: • less than $1 million at PECO • $1 million at BGE (e) Includes late payment charge revenues. The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Nine Months Ended September 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,744 $ 1,617 $ 1,308 $ 2,181 $ 954 $ 626 $ 601 Small commercial & industrial 1,363 415 253 503 134 189 180 Large commercial & industrial 553 196 412 1,099 838 98 163 Public authorities & electric railroads 33 23 22 49 25 11 13 Other (a) 716 219 303 563 187 186 194 Total electric revenues (b) $ 5,409 $ 2,470 $ 2,298 $ 4,395 $ 2,138 $ 1,110 $ 1,151 Natural gas revenues Residential $ — $ 335 $ 406 $ 88 $ — $ 88 $ — Small commercial & industrial — 123 66 40 — 40 — Large commercial & industrial — 1 124 3 — 3 — Transportation — 20 — 11 — 11 — Other (c) — 12 28 8 — 8 — Total natural gas revenues (d) $ — $ 491 $ 624 $ 150 $ — $ 150 $ — Total revenues from contracts with customers $ 5,409 $ 2,961 $ 2,922 $ 4,545 $ 2,138 $ 1,260 $ 1,151 Other revenues Revenues from alternative revenue programs $ 405 $ 1 $ 47 $ 59 $ 28 $ 10 $ 21 Other electric revenues (e) 22 13 12 11 8 3 — Other natural gas revenues (e) — 2 5 — — — — Total other revenues $ 427 $ 16 $ 64 $ 70 $ 36 $ 13 $ 21 Total revenues for reportable segments $ 5,836 $ 2,977 $ 2,986 $ 4,615 $ 2,174 $ 1,273 $ 1,172 Nine Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,610 $ 1,538 $ 1,158 $ 2,007 $ 826 $ 570 $ 611 Small commercial & industrial 953 386 239 461 117 173 171 Large commercial & industrial 48 229 418 1,056 806 99 151 Public authorities & electric railroads 22 23 20 47 25 11 11 Other (a) 718 202 297 524 157 168 190 Total electric revenues (b) $ 4,351 $ 2,378 $ 2,132 $ 4,095 $ 1,931 $ 1,021 $ 1,134 Natural gas revenues Residential $ — $ 335 $ 448 $ 77 $ — $ 77 $ — Small commercial & industrial — 125 77 35 — 35 — Large commercial & industrial — — 128 9 — 9 — Transportation — 19 — 11 — 11 — Other (c) — 7 50 25 — 25 — Total natural gas revenues (d) $ — $ 486 $ 703 $ 157 $ — $ 157 $ — Total revenues from contracts with customers $ 4,351 $ 2,864 $ 2,835 $ 4,252 $ 1,931 $ 1,178 $ 1,134 Other revenues Revenues from alternative revenue programs $ 163 $ 1 $ (40) $ (33) $ (15) $ (3) $ (14) Other electric revenues (e) 22 11 11 4 3 1 — Other natural gas revenues (e) — 1 4 — — — — Total other revenues $ 185 $ 13 $ (25) $ (29) $ (12) $ (2) $ (14) Total revenues for reportable segments $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,919 $ 1,176 $ 1,120 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2023 and 2022 respectively of: • $14 million, $14 million at ComEd • $5 million, $5 million at PECO • $4 million, $5 million at BGE • $7 million, $9 million at PHI • $5 million, $4 million at Pepco • $5 million, $5 million at DPL • $1 million, $2 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2023 and 2022 respectively of: • $1 million, $1 million at PECO • $2 million, $7 million at BGE (e) Includes late payment charge revenues.

Accounts Receivable (Tables)

Accounts Receivable (Tables)	9 Months Ended
Accounts Receivable (Tables)	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Allowance for credit loss rollforward	The following tables present the rollforward of Allowance for Credit Losses on Customer Accounts Receivable. Three Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2023 $ 323 $ 67 $ 101 $ 50 $ 105 $ 50 $ 21 $ 34 Plus: Current period provision for expected credit losses (a) 72 24 13 9 26 11 6 9 Less: Write-offs, net of recoveries (b) 54 15 19 7 13 5 4 4 Balance at September 30, 2023 $ 341 $ 76 $ 95 $ 52 $ 118 $ 56 $ 23 $ 39 Three Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 Plus: Current period provision for expected credit losses 38 10 12 2 14 6 1 7 Less: Write-offs, net of recoveries 51 17 16 5 12 4 3 5 Balance at September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 Nine Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2022 $ 327 $ 59 $ 105 $ 54 $ 109 $ 47 $ 21 $ 41 Plus: Current period provision for expected credit losses (c)(d) 144 45 32 23 44 24 10 10 Less: Write-offs, net (e)(f)(g) of recoveries (b) 130 28 42 25 35 15 8 12 Balance at September 30, 2023 $ 341 $ 76 $ 95 $ 52 $ 118 $ 56 $ 23 $ 39 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2021 $ 320 $ 73 $ 105 $ 38 $ 104 $ 37 $ 18 $ 49 Plus: Current period provision for expected credit losses 141 31 33 30 47 23 8 16 Less: Write-offs, net of recoveries 120 30 35 14 40 16 6 18 Balance at September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 __________ (a) For ComEd, BGE, PHI, Pepco, DPL and ACE, the change in current period provision for expected credit losses is primarily a result of increased receivable balances. (b) Recoveries were not material to the Registrants. (c) For ComEd and DPL, the change in current period provision for expected credit losses is primarily a result of increased receivable balances. (d) For BGE and ACE, the change in current period provision for expected credit losses is primarily a result of changes in customer risk profile. (e) For PECO and BGE, the change in write-offs is primarily a result of increased disconnection activities. (f) For DPL, the change in write-offs is primarily attributable to unfavorable customer payment behavior. (g) For ACE, the change in write-offs is primarily attributable to the termination of the moratorium in New Jersey, which beginning in March 2020, prevented customer disconnections for non-payment. Disconnection activities resumed in January 2022, driving the change in write-offs of aging accounts receivable for the nine months ended September 20, 2023. The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable. Three Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2023 $ 87 $ 18 $ 8 $ 8 $ 53 $ 31 $ 9 $ 13 Plus: Current period provision (benefit) for expected credit losses 6 3 2 3 (2) (2) — — Less: Write-offs, net of recoveries (a) 5 1 2 2 — — — — Balance at September 30, 2023 $ 88 $ 20 $ 8 $ 9 $ 51 $ 29 $ 9 $ 13 Three Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 14 Plus: Current period provision (benefit) for expected credit losses 8 2 2 2 2 2 (1) 1 Less: Write-offs, net of recoveries 5 2 1 1 1 — — 1 Balance at September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 Nine Months Ended September 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2022 $ 82 $ 17 $ 9 $ 10 $ 46 $ 25 $ 7 $ 14 Plus: Current period provision for expected credit losses 21 6 3 5 7 4 2 1 Less: Write-offs, net of recoveries (a) 15 3 4 6 2 — — 2 Balance at September 30, 2023 $ 88 $ 20 $ 8 $ 9 $ 51 $ 29 $ 9 $ 13 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at December 31, 2021 $ 72 $ 17 $ 7 $ 9 $ 39 $ 16 $ 8 $ 15 Plus: Current period provision (benefit) for expected credit losses 24 5 6 6 7 6 (1) 2 Less: Write-offs, net of recoveries 12 4 2 3 3 — — 3 Balance at September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 __________ (a) Recoveries were not material to the Registrants.
Unbilled customer revenue	The following table provides additional information about unbilled customer revenues recorded in the Registrants' Consolidated Balance Sheets at September 30, 2023 and December 31, 2022. Unbilled customer revenues (a) Exelon ComEd PECO BGE PHI Pepco DPL ACE September 30, 2023 $ 740 $ 279 $ 135 $ 118 $ 208 $ 100 $ 44 $ 64 December 31, 2022 912 223 219 247 223 103 74 46 __________ (a) Unbilled customer revenues are classified in Customer accounts receivable, net in the Registrants' Consolidated Balance Sheets.
Purchases of accounts receivable	The Utility Registrants are required, under separate legislation and regulations in Illinois, Pennsylvania, Maryland, District of Columbia, Delaware, and New Jersey, to purchase certain receivables from alternative retail electric and, as applicable, natural gas suppliers that participate in the utilities' consolidated billing. The following table presents the total receivables purchased. Total receivables purchased Exelon ComEd PECO BGE PHI Pepco DPL ACE Nine months ended September 30, 2023 $ 3,124 $ 726 $ 843 $ 628 $ 927 $ 600 $ 174 $ 153 Nine months ended September 30, 2022 3,088 (a) 753 832 607 (a) 896 559 168 169 __________

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended	9 Months Ended
Income Taxes (Tables)	Sep. 30, 2023	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The effective income tax rate from continuing operations varies from the U.S. federal statutory rate principally due to the following: Three Months Ended September 30, 2023 (a) Exelon ComEd PECO (b) BGE PHI Pepco DPL ACE U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of federal income tax benefit (c) (2.7) 7.8 (1.2) 6.6 6.2 5.5 6.1 7.0 Plant basis differences (4.4) (0.4) (15.6) (0.2) (1.5) (2.4) (0.9) (0.5) Excess deferred tax amortization (6.4) (5.3) (2.4) (5.4) (8.0) (9.2) (10.0) (3.1) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.1) (0.1) Tax credits (0.5) (1.2) — (2.0) (0.5) (0.6) (0.4) (0.3) Other 1.8 0.2 0.2 (0.3) 0.3 0.6 — 0.5 Effective income tax rate 8.7 % 22.0 % 2.0 % 19.6 % 17.4 % 14.9 % 15.7 % 24.5 % Three Months Ended September 30, 2022 (a) Exelon ComEd PECO (d) BGE (d) PHI (d) Pepco (d) DPL (d) ACE (d) U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of federal income tax benefit 9.0 8.0 20.7 6.8 1.4 (2.7) 6.5 7.0 Plant basis differences (5.3) (0.4) (14.2) (2.6) (1.7) (2.3) (0.8) (1.0) Excess deferred tax amortization (11.6) (5.6) (3.2) (47.3) (19.3) (14.6) (21.7) (25.5) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.2) (0.1) — (0.2) (0.2) Tax credits (0.6) (0.4) — (1.9) (0.9) (0.8) (1.3) (0.7) Other (0.4) (0.1) 0.3 (2.7) 0.3 0.1 0.2 0.5 Effective income tax rate 12.0 % 22.4 % 24.6 % (26.9) % 0.7 % 0.7 % 3.7 % 1.1 % __________ (a) Positive percentages represent income tax expense. Negative percentages represent income tax benefit. (b) For PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. (c) For Exelon, the lower state income taxes, net of federal income tax expense, is primarily due to the long-term marginal state income tax rate change of $54 million. (d) For PECO, the higher effective tax rate is related to a one-time state income expense, net of federal income tax benefit, of $38 million attributable to the change in the Pennsylvania corporate income tax rate partially offset by plant basis differences attributable to tax repair deductions. For BGE, PHI, Pepco, DPL, and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. Nine Months Ended September 30, 2023 (a) Exelon ComEd PECO (b) BGE PHI Pepco DPL ACE U.S. Federal statutory rate 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% Increase (decrease) due to: State income taxes, net of federal income tax benefit (c) 2.8 7.8 (1.3) 6.5 6.1 5.5 6.2 6.9 Plant basis differences (4.3) (0.4) (15.5) (0.5) (1.6) (2.5) (1.0) (0.5) Excess deferred tax amortization (6.6) (5.5) (2.4) (5.4) (7.7) (9.2) (9.4) (2.6) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.1) (0.1) Tax credits (0.5) (0.7) — (0.7) (0.6) (0.7) (0.4) (0.3) Other 1.5 0.1 0.1 0.2 0.3 0.6 — 0.3 Effective income tax rate 13.8% 22.2% 1.9% 21.0% 17.4% 14.7% 16.3% 24.7% Nine Months Ended September 30, 2022 (a) Exelon ComEd PECO (d) BGE (d) PHI (d) Pepco (d) DPL (d) ACE (d) U.S. Federal statutory rate 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% 21.0% Increase (decrease) due to: State income taxes, net of federal income tax benefit (e) 9.5 7.9 6.6 2.8 2.0 (3.2) 6.5 6.9 Plant basis differences (4.2) (0.5) (12.2) (1.1) (1.7) (2.4) (0.7) (1.1) Excess deferred tax amortization (11.3) (5.7) (3.2) (20.7) (18.8) (15.4) (20.4) (24.7) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.2) (0.2) Tax credits (f) 0.3 (0.3) — (0.7) (0.7) (0.6) (0.7) (0.6) Other (g) 2.8 — 0.2 (0.1) 0.2 (0.2) 0.3 0.2 Effective income tax rate 18.0% 22.3% 12.4% 1.1% 1.9% (0.8)% 5.8% 1.5% __________ (a) Positive percentages represent income tax expense. Negative percentages represent income tax benefit. (b) For PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. (c) For Exelon, the lower state income taxes, net of federal income tax expense, is primarily due to the long-term marginal state income tax rate change of $54 million. (d) For PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions partially offset by higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. For BGE, PHI, Pepco, DPL and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. (e) For Exelon, the higher state income taxes, net of federal income tax benefit, is primarily due to the long-term marginal state income tax rate change of approximately $67 million and the recognition of a valuation allowance of approximately $40 million against the net deferred tax asset position for certain standalone state filing jurisdictions, partially offset by a one-time impact associated with a state tax benefit of $43 million and indemnification adjustments pursuant to the Tax Matters Agreement of $4 million as a result of the separation. For PECO, the higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. (f) For Exelon, reflects the income tax expense related to the write-off of federal tax credits subject to recapture of approximately $15 million as a result of the separation.
Schedule of Unrecognized Tax Benefits Roll Forward		Exelon, PHI and ACE have the following unrecognized tax benefits at September 30, 2023 and December 31, 2022. ComEd's, PECO's, BGE's, Pepco's, and DPL's amounts are not material. Exelon (a) PHI ACE September 30, 2023 $ 138 $ 56 $ 16 December 31, 2022 148 59 17 __________
Allocation of Tax Benefits		The following table presents the allocation of tax benefits from Exelon under the Tax Sharing Agreement, for the three and nine months ended September 30, 2023, and 2022. ComEd PECO BGE PHI Pepco DPL ACE September 30, 2023 $ 13 $ 19 $ — $ 10 $ 4 $ — $ 2 September 30, 2022 $ 1 $ 47 $ — $ 28 23 $ 3 2

Retirement Benefits (Tables)

Retirement Benefits (Tables)	9 Months Ended
Retirement Benefits (Tables)	Sep. 30, 2023
Retirement Benefits [Abstract]
Calculation of Net Periodic Benefit Costs	A portion of the net periodic benefit cost for all plans is capitalized within the Consolidated Balance Sheets. The following table presents the components of Exelon's net periodic benefit costs, prior to capitalization, for the three and nine months ended September 30, 2023 and 2022. Pension Benefits OPEB Three Months Ended September 30, Three Months Ended September 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 39 $ 58 $ 6 $ 10 Interest cost 145 110 25 19 Expected return on assets (189) (205) (21) (25) Amortization of: Prior service cost (credit) 1 1 (2) (5) Actuarial loss 41 73 — 4 Settlement charges 18 — — — Net periodic benefit cost $ 55 $ 37 $ 8 $ 3 Pension Benefits OPEB Nine Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 116 $ 177 $ 18 $ 30 Interest cost 434 330 76 57 Expected return on assets (566) (619) (63) (75) Amortization of: Prior service cost (credit) 2 3 (7) (15) Actuarial loss (gain) 125 222 (1) 12 Settlement charges 18 — — — Net periodic benefit cost $ 129 $ 113 $ 23 $ 9
Allocated Portion of Pension and Postretirement Benefit Costs	The amounts below represent the Registrants' allocated pension and OPEB costs. For Exelon, the service cost component is included in Operating and maintenance expense and Property, plant, and equipment, net while the non-service cost components are included in Other, net and Regulatory assets. For the Utility Registrants, which apply multi-employer accounting, the service cost and non-service cost components are included in Operating and maintenance expense and Property, plant, and equipment, net in their consolidated financial statements. Three Months Ended September 30, Nine Months Ended September 30, Pension and OPEB Costs (Benefit) 2023 2022 2023 2022 Exelon $ 63 $ 40 $ 152 $ 122 ComEd 6 15 19 45 PECO (3) (2) (10) (6) BGE 14 11 42 33 PHI 25 13 74 39 Pepco 9 2 26 6 DPL 4 1 13 3 ACE 3 3 10 9
Defined Contribution Savings Plans	The Registrants participate in a 401(k) defined contribution savings plan that is sponsored by Exelon. The plan is qualified under applicable sections of the IRC and allows employees to contribute a portion of their pre-tax and/or after-tax income in accordance with specified guidelines. All Registrants match a percentage of the employee contributions up to certain limits. The following table presents the employer contributions and employer matching contributions to the savings plan for the three and nine months ended September 30, 2023 and 2022. Three Months Ended September 30, Nine Months Ended September 30, Savings Plan Employer Contributions 2023 2022 2023 2022 Exelon $ 27 $ 23 $ 74 $ 66 ComEd 12 11 31 29 PECO 3 3 10 9 BGE 3 2 8 7 PHI 5 4 13 11 Pepco 1 1 3 3 DPL 1 1 3 3 ACE 1 1 2 2

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
Derivative Instruments and Hedging Activities (Tables)	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following table provides a summary of the Utility Registrants’ primary derivative hedging instruments, listed by commodity and accounting treatment. Registrant Commodity Accounting Treatment Hedging Instrument ComEd Electricity NPNS Fixed price contracts based on all requirements in the IPA procurement plans. Electricity Changes in fair value of economic hedge recorded to an offsetting regulatory asset or liability (a) 20-year floating-to-fixed energy swap contracts beginning June 2012 based on the renewable energy resource procurement requirements in the Illinois Settlement Legislation of approximately 1.3 million MWhs per year. PECO Electricity NPNS Fixed price contracts for default supply requirements through full requirements contracts. Gas NPNS Fixed price contracts to cover about 10% of planned natural gas purchases in support of projected firm sales. BGE Electricity NPNS Fixed price contracts for all SOS requirements through full requirements contracts. Gas NPNS Fixed price contracts for between 10-20% of forecasted system supply requirements for flowing (i.e., non-storage) gas for the November through March period. Pepco Electricity NPNS Fixed price contracts for all SOS requirements through full requirements contracts. DPL Electricity NPNS Fixed price contracts for all SOS requirements through full requirements contracts. Gas NPNS Fixed and index priced contracts through full requirements contracts. Gas Changes in fair value of economic hedge recorded to an offsetting regulatory asset or liability (b) Exchange traded future contracts for up to 50% of estimated monthly purchase requirements each month, including purchases for storage injections. ACE Electricity NPNS Fixed price contracts for all BGS requirements through full requirements contracts. __________ (a) See Note 3 — Regulatory Matters of the 2022 Form 10-K for additional information. (b) The fair value of the DPL economic hedge is not material at September 30, 2023 and December 31, 2022.
Schedule of Interest Rate Derivatives	Below is a summary of the interest rate hedge balances at September 30, 2023 and December 31, 2022 . September 30, 2023 Derivatives Designated Economic Hedges Total Other current assets $ — $ 3 $ 3 Other deferred debits (noncurrent assets) 41 — 41 Total derivative assets 41 3 44 Mark-to-market derivative liabilities (current liabilities) — (23) (23) Total mark-to-market derivative liabilities — (23) (23) Total mark-to-market derivative net assets (liabilities) $ 41 $ (20) $ 21 December 31, 2022 Derivatives Designated Economic Hedges Total Other deferred debits (noncurrent assets) $ 6 $ 5 $ 11 Total derivative assets 6 5 11 Mark-to-market derivative liabilities (current liabilities) — (3) (3) Mark-to-market derivative liabilities (noncurrent liabilities) (4) — (4) Total mark-to-market derivative liabilities (4) (3) (7) Total mark-to-market derivative net assets $ 2 $ 2 $ 4
Schedule of Notional Amounts of Outstanding Derivative Positions	The following table provides the notional amounts outstanding held by Exelon at September 30, 2023 and December 31, 2022. September 30, 2023 December 31, 2022 5-year maturity floating-to-fixed swaps $ 390 $ 635 10-year maturity floating-to-fixed swaps 390 635 Total $ 780 $ 1,270
Derivatives Not Designated as Hedging Instruments	The following table provides the notional amounts outstanding held by Exelon at September 30, 2023 and December 31, 2022. Hedging Instrument September 30, 2023 December 31, 2022 Interest rate cap swaps $ 1,000 $ 1,850 Constant maturity treasury interest rate swaps 4,875 500 Total $ 5,875 $ 2,350
Economic Hedges (Commodity Price Risk)	For the three and nine months ended September 30, 2023, Exelon Corporate recognized the following net pre-tax mark-to-market (losses) which are also recognized in Net fair value changes related to derivatives in Exelon's Consolidated Statements of Cash Flows. Exelon had no swaps for the three and nine months ended September 30, 2022. Three Months Ended September 30, 2023 Nine Months Ended September 30, 2023 Income Statement Location (Loss) Gain (Loss) Gain Electric operating revenues $ (16) $ (21) Interest expense — 1 Total $ (16) $ (20)
Cash collateral held with external counterparties	The following table reflects the Registrants' cash collateral held from external counterparties, which is recorded in Other current liabilities on their respective Consolidated Balance Sheets, at September 30, 2023 and December 31, 2022: September 30, 2023 December 31, 2022 Exelon $ 112 $ 297 ComEd 105 77 PECO (a) — — BGE 1 23 PHI 6 197 Pepco (b) — 26 DPL 1 121 ACE 5 50 __________ (a) PECO had less than one million in cash collateral held with external parties at September 30, 2023 and December 31, 2022.

Debt and Credit Agreements (A_2

Debt and Credit Agreements (All Registrants) (Tables)	9 Months Ended
Debt and Credit Agreements (All Registrants) (Tables)	Sep. 30, 2023
Debt Disclosure [Abstract]
Schedule of Commercial Paper Borrowings	The following table reflects the Registrants' commercial paper programs supported by the revolving credit agreements at September 30, 2023 and December 31, 2022. Outstanding Commercial Average Interest Rate on Commercial Paper Issuer September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 Exelon (a) $ 820 $ 1,938 5.44 % 4.77 % ComEd 277 427 5.42 % 4.71 % PECO — 239 — % 4.71 % BGE 59 409 5.43 % 4.81 % PHI (b) 173 414 5.47 % 4.78 % Pepco — 299 — % 4.79 % DPL — 115 — % 4.76 % ACE 173 — 5.47 % — % __________ (a) Exelon Corporate had $311 million and $449 million in outstanding commercial paper borrowings at September 30, 2023 and December 31, 2022, respectively. (b) Represents the consolidated amounts of Pepco, DPL, and ACE.
Schedule of Revolving Credit Agreements	Exelon Corporate and the Utility Registrants each have a 5-year revolving credit facility. The following table reflects the credit agreements: Borrower Aggregate Bank Commitment Interest Rate Exelon Corporate $ 900 SOFR plus 1.275 % ComEd 1,000 SOFR plus 1.000 % PECO 600 SOFR plus 0.900 % BGE 600 SOFR plus 0.900 % Pepco 300 SOFR plus 1.075 % DPL 300 SOFR plus 1.000 % ACE 300 SOFR plus 1.075 %
Schedule of Long-term Debt Instruments	During the nine months ended September 30, 2023, the following long-term debt was issued: Company Type Interest Rate Maturity Amount Use of Proceeds Exelon Notes 5.15% March 15, 2028 $1,000 Repay existing indebtedness and for general corporate purposes. Exelon Notes 5.30% March 15, 2033 850 Repay existing indebtedness and for general corporate purposes. Exelon Notes 5.60% March 15, 2053 650 Repay existing indebtedness and for general corporate purposes. ComEd First Mortgage Bonds, Series 134 4.90% February 1, 2033 400 Repay outstanding commercial paper obligations and to fund other general corporate purposes. ComEd First Mortgage Bonds Series 135 5.30% February 1, 2053 575 Repay outstanding commercial paper obligations and to fund other general corporate purposes. PECO First and Refunding Mortgage Bonds 4.90% June 15, 2033 575 Refinance existing indebtedness, refinance outstanding commercial paper obligations, and for general corporate purposes. BGE Notes 5.40% June 1, 2053 700 Repay outstanding commercial paper obligations, repay existing indebtedness, and for general corporate purposes. Pepco First Mortgage Bonds 5.30% March 15, 2033 85 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 5.40% March 15, 2038 40 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 5.57% March 15, 2053 125 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 5.35% September 13, 2033 100 Repay existing indebtedness and for general corporate purposes. DPL (a) First Mortgage Bonds 5.30% March 15, 2033 60 Repay existing indebtedness and for general corporate purposes. DPL First Mortgage Bonds 5.57% March 15, 2053 65 Repay existing indebtedness and for general corporate purposes. ACE First Mortgage Bonds 5.57% March 15, 2053 75 Repay existing indebtedness and for general corporate purposes. __________ (a) On March 15, 2023, DPL entered into a purchase agreement of First Mortgage Bonds of $340 million, $75 million, and $110 million at 5.45%, 5.55% and 5.72% due on November 8, 2033, November 8, 2038, and November 8, 2053, respectively. The closing date of the issuance is expected to occur in November 2023.

Fair Value of Financial Asset_2

Fair Value of Financial Assets and Liabilities (Tables)	9 Months Ended
Fair Value of Financial Assets and Liabilities (Tables)	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value of Financial Liabilities Recorded at Amortized Cost	Fair Value of Financial Liabilities Recorded at Amortized Cost The following tables present the carrying amounts and fair values of the Registrants’ short-term liabilities, long-term debt, and trust preferred securities (long-term debt to financing trusts or junior subordinated debentures) as of September 30, 2023 and December 31, 2022. The Registrants have no financial liabilities measured using the NAV practical expedient. The carrying amounts of the Registrants’ short-term liabilities as presented in their Consolidated Balance Sheets are representative of their fair value (Level 2) because of the short-term nature of these instruments. September 30, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Long-Term Debt, including amounts due within one year (a) Exelon $ 41,085 $ — $ 31,584 $ 2,675 $ 34,259 $ 37,074 $ — $ 29,902 $ 2,327 $ 32,229 ComEd 11,484 — 9,343 — 9,343 10,518 — 9,006 — 9,006 PECO 5,133 — 4,110 — 4,110 4,612 — 3,864 50 3,914 BGE 4,601 — 3,735 — 3,735 4,207 — 3,613 — 3,613 PHI 8,637 — 4,352 2,675 7,027 8,120 — 4,507 2,277 6,784 Pepco 4,095 — 2,129 1,473 3,602 3,751 — 2,229 1,205 3,434 DPL 2,060 — 1,126 543 1,669 1,938 — 1,164 458 1,622 ACE 1,833 — 893 659 1,552 1,757 — 909 614 1,523 Long-Term Debt to Financing Trusts Exelon $ 390 $ — $ — $ 384 $ 384 $ 390 $ — $ — $ 384 $ 384 ComEd 205 — — 206 206 205 — — 204 204 PECO 184 — — 179 179 184 — — 180 180 __________
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Recurring Fair Value Measurements The following tables present assets and liabilities measured and recorded at fair value in the Registrants' Consolidated Balance Sheets on a recurring basis and their level within the fair value hierarchy at September 30, 2023 and December 31, 2022. The Registrants have no financial assets or liabilities measured using the NAV practical expedient: Exelon At September 30, 2023 At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 649 $ — $ — $ 649 $ 664 $ — $ — $ 664 Rabbi trust investments Cash equivalents 66 — — 66 62 — — 62 Mutual funds 53 — — 53 49 — — 49 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 60 42 102 — 58 40 98 Rabbi trust investments subtotal 119 67 42 228 111 65 40 216 Interest rate derivative assets Derivatives designated as hedging instruments — 41 — 41 — 6 — 6 Economic hedges — 3 — 3 — 5 — 5 Interest rate derivative assets subtotal — 44 — 44 — 11 — 11 Total assets 768 111 42 921 775 76 40 891 Liabilities Commodity derivative liabilities — — (134) (134) — — (84) (84) Interest rate derivative liabilities Derivatives designated as hedging instruments — — — — — (4) — (4) Economic hedges — (23) — (23) — (3) — (3) Interest rate derivative liabilities subtotal — (23) — (23) — (7) — (7) Deferred compensation obligation — (69) — (69) — (75) — (75) Total liabilities — (92) (134) (226) — (82) (84) (166) Total net assets (liabilities) $ 768 $ 19 $ (92) $ 695 $ 775 $ (6) $ (44) $ 725 __________ (a) Exelon excludes cash of $188 million and $345 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $110 million and $81 million at September 30, 2023 and December 31, 2022, respectively, and includes long-term restricted cash of $212 million and $117 million at September 30, 2023 and December 31, 2022, respectively, which is reported in Other deferred debits and other assets in the Consolidated Balance Sheets. ComEd, PECO, and BGE ComEd PECO BGE At September 30, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 491 $ — $ — $ 491 $ 29 $ — $ — $ 29 $ 2 $ — $ — $ 2 Rabbi trust investments Mutual funds — — — — 9 — — 9 9 — — 9 Life insurance contracts — — — — — 17 — 17 — — — — Rabbi trust investments subtotal — — — — 9 17 — 26 9 — — 9 Total assets 491 — — 491 38 17 — 55 11 — — 11 Liabilities Commodity derivative liabilities (b) — — (134) (134) — — — — — — — — Deferred compensation obligation — (7) — (7) — (8) — (8) — (4) — (4) Total liabilities — (7) (134) (141) — (8) — (8) — (4) — (4) Total net assets (liabilities) $ 491 $ (7) $ (134) $ 350 $ 38 $ 9 $ — $ 47 $ 11 $ (4) $ — $ 7 ComEd PECO BGE At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 392 $ — $ — $ 392 $ 10 $ — $ — $ 10 $ 23 $ — $ — $ 23 Rabbi trust investments Mutual funds — — — — 7 — — 7 7 — — 7 Life insurance contracts — — — — — 15 — 15 — — — — Rabbi trust investments subtotal — — — — 7 15 — 22 7 — — 7 Total assets 392 — — 392 17 15 — 32 30 — — 30 Liabilities Commodity derivative liabilities (b) — — (84) (84) — — — — — — — — Deferred compensation obligation — (8) — (8) — (7) — (7) — (4) — (4) Total liabilities — (8) (84) (92) — (7) — (7) — (4) — (4) Total net assets (liabilities) $ 392 $ (8) $ (84) $ 300 $ 17 $ 8 $ — $ 25 $ 30 $ (4) $ — $ 26 __________ (a) ComEd excludes cash of $55 million and $42 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $105 million and $77 million at September 30, 2023 and December 31, 2022, respectively. Additionally, ComEd includes long-term restricted cash of $212 million and $117 million at September 30, 2023 and December 31, 2022, respectively, which is reported in Other deferred debits and other assets in the Consolidated Balance Sheets. PECO excludes cash of $23 million and $58 million at September 30, 2023 and December 31, 2022, respectively. BGE excludes cash of $13 million and $43 million at September 30, 2023 and December 31, 2022, respectively, and restricted cash of $1 million and $1 million at September 30, 2023 and December 31, 2022, respectively. (b) The Level 3 balance consists of the current and noncurrent liability of $21 million and $113 million, respectively, at September 30, 2023 and $5 million and $79 million, respectively, at December 31, 2022 related to floating-to-fixed energy swap contracts with unaffiliated suppliers. PHI, Pepco, DPL, and ACE At September 30, 2023 At December 31, 2022 PHI Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 83 $ — $ — $ 83 $ 205 $ — $ — $ 205 Rabbi trust investments Cash equivalents 63 — — 63 59 — — 59 Mutual funds 10 — — 10 11 — — 11 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 21 40 61 — 22 39 61 Rabbi trust investments subtotal 73 28 40 141 70 29 39 138 Total assets 156 28 40 224 275 29 39 343 Liabilities Deferred compensation obligation — (13) — (13) — (14) — (14) Total liabilities — (13) — (13) — (14) — (14) Total net assets $ 156 $ 15 $ 40 $ 211 $ 275 $ 15 $ 39 $ 329 Pepco DPL ACE At September 30, 2023 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 22 $ — $ — $ 22 $ 1 $ — $ — $ 1 $ 1 $ — $ — $ 1 Rabbi trust investments Cash equivalents 62 — — 62 — — — — — — — — Life insurance contracts — 21 40 61 — — — — — — — — Rabbi trust investments subtotal 62 21 40 123 — — — — — — — — Total assets 84 21 40 145 1 — — 1 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 84 $ 20 $ 40 $ 144 $ 1 $ — $ — $ 1 $ 1 $ — $ — $ 1 Pepco DPL ACE At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 51 $ — $ — $ 51 $ 121 $ — $ — $ 121 $ 1 $ — $ — $ 1 Rabbi trust investments Cash equivalents 59 — — 59 — — — — — — — — Life insurance contracts — 22 38 60 — — — — — — — — Rabbi trust investments subtotal 59 22 38 119 — — — — — — — — Total assets 110 22 38 170 121 — — 121 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 110 $ 21 $ 38 $ 169 $ 121 $ — $ — $ 121 $ 1 $ — $ — $ 1 __________
Fair Value Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis	Reconciliation of Level 3 Assets and Liabilities The following tables present the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis during the three and nine months ended September 30, 2023 and 2022: Exelon ComEd PHI and Pepco Three Months Ended September 30, 2023 Total Commodity Life Insurance Contracts Balance at June 30, 2023 $ (91) $ (133) $ 42 Total realized / unrealized gains (losses) Included in net income (a) — — (2) Included in regulatory assets/liabilities (1) (1) (b) — Balance at September 30, 2023 $ (92) $ (134) (c) $ 40 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at September 30, 2023 $ — $ — $ (2) Exelon ComEd PHI and Pepco Three Months Ended September 30, 2022 Total Commodity Life Insurance Contracts Balance at June 30, 2022 $ (50) $ (88) $ 37 Total realized / unrealized gains (losses) Included in net income (a) 1 — 1 Included in regulatory assets/liabilities 45 45 (b) — Balance at September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at September 30, 2022 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Nine Months Ended September 30, 2023 Total Commodity Life Insurance Contracts Balance at December 31, 2022 $ (44) $ (84) $ 40 Total realized / unrealized gains (losses) Included in net income (a) 2 — — Included in regulatory assets/liabilities (50) (50) (b) — Balance at September 30, 2023 $ (92) $ (134) (c) $ 40 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at September 30, 2023 $ 2 $ — $ — Exelon ComEd PHI and Pepco Nine Months Ended September 30, 2022 Total Commodity Life Insurance Contracts Balance at December 31, 2021 $ (182) $ (219) $ 35 Total realized / unrealized gains (losses) Included in net income (a) 3 — 3 Included in regulatory assets/liabilities 176 176 (b) — Transfers out of Level 3 (1) — — Balance at September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gain related to assets and liabilities at September 30, 2022 $ 3 $ — $ 3 __________ (a) Classified in Operating and maintenance expense in the Consolidated Statements of Operations and Comprehensive Income. (b) Includes $5 million of decreases in fair value and an increase for realized gains due to settlements of $4 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2023. Includes $51 million of increases in fair value and a decrease for realized gains due to settlements of $6 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2022. Includes $73 million of decreases in fair value and an increase for realized gains due to settlements of $23 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2023. Includes $179 million of increases in fair value and a decrease for realized losses due to settlements of $3 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2022. (c) The balance consists of a current and noncurrent liability of $21 million and $113 million, respectively, at September 30, 2023. The balance consists of $24 million of current assets and current and noncurrent liability of none and $67 million, respectively at September 30, 2022.
Fair Value Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis, Valuation Technique	Commodity Derivatives (Exelon and ComEd) The table below discloses the significant unobservable inputs to the forward curve used to value mark-to-market derivatives. Type of trade Fair Value at September 30, 2023 Fair Value at December 31, 2022 Valuation Unobservable 2023 Range & Arithmetic Average 2022 Range & Arithmetic Average Commodity derivatives $ (134) $ (84) Discounted Forward power price (a) $30.13 - $72.72 $42.77 $34.78 - $75.71 $48.44 ________ (a) An increase to the forward power price would increase the fair value.

Commitments and Contingencies_2

Commitments and Contingencies (Tables)	9 Months Ended
Commitments and Contingencies (Tables)	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
PHI Merger Commitments	The following amounts represent total commitment costs that have been recorded since the acquisition date and the total remaining obligations for Exelon, PHI, Pepco, DPL, and ACE at September 30, 2023: Description Exelon PHI Pepco DPL ACE Total commitments $ 513 $ 320 $ 120 $ 89 $ 111 Remaining commitments (a) 42 39 34 3 2 __________ (a) Remaining commitments extend through 2026 and include escrow funds, charitable contributions, and rate credits.
Commercial Commitments	The Registrants’ commercial commitments at September 30, 2023, representing commitments potentially triggered by future events were as follows: Expiration within Total 2023 2024 2025 2026 2027 2028 and beyond Exelon Letters of credit $ 20 $ 9 $ 11 $ — $ — $ — $ — Surety bonds (a) 207 85 122 — — — — Financing trust guarantees 378 — — — — — 378 Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 634 $ 94 $ 137 $ 6 $ 5 $ 4 $ 388 ComEd Letters of credit $ 12 $ 6 $ 6 $ — $ — $ — $ — Surety bonds (a) 46 5 41 — — — — Financing trust guarantees 200 — — — — — 200 Total commercial commitments $ 258 $ 11 $ 47 $ — $ — $ — $ 200 PECO Letters of credit $ 1 $ — $ 1 $ — $ — $ — $ — Surety bonds (a) 2 — 2 — — — — Financing trust guarantees 178 — — — — — 178 Total commercial commitments $ 181 $ — $ 3 $ — $ — $ — $ 178 BGE Letters of credit $ 4 $ 2 $ 2 $ — $ — $ — $ — Surety bonds (a) 3 1 2 — — — — Total commercial commitments $ 7 $ 3 $ 4 $ — $ — $ — $ — PHI Surety bonds (a) $ 97 $ 75 $ 22 $ — $ — $ — $ — Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 126 $ 75 $ 26 $ 6 $ 5 $ 4 $ 10 Pepco Surety bonds (a) $ 85 $ 71 $ 14 $ — $ — $ — $ — Guaranteed lease residual values (b) 10 — 1 3 2 1 3 Total commercial commitments $ 95 $ 71 $ 15 $ 3 $ 2 $ 1 $ 3 DPL Surety bonds (a) $ 7 $ 2 $ 5 $ — $ — $ — $ — Guaranteed lease residual values (b) 12 — 2 2 2 2 4 Total commercial commitments $ 19 $ 2 $ 7 $ 2 $ 2 $ 2 $ 4 ACE Surety bonds (a) $ 5 $ 2 $ 3 $ — $ — $ — $ — Guaranteed lease residual values (b) 7 — 1 1 1 1 3 Total commercial commitments $ 12 $ 2 $ 4 $ 1 $ 1 $ 1 $ 3 __________ (a) Surety bonds — Guarantees issued related to contract and commercial agreements, excluding bid bonds. (b) Represents the maximum potential obligation in the event that the fair value of certain leased equipment and fleet vehicles is zero at the end of the maximum lease term. The lease term associated with these assets ranges from 1 to 9 years. The maximum potential obligation at the end of the minimum lease term would be $66 million guaranteed by Exelon and PHI, of which $22 million, $26 million, and $18 million is guaranteed by Pepco, DPL, and ACE, respectively. Historically, payments under the guarantees have not been made and PHI believes the likelihood of payments being required under the guarantees is remote.
Accrued environmental liabilities	At September 30, 2023 and December 31, 2022, the Registrants had accrued the following undiscounted amounts for environmental liabilities in Accrued expenses, Other current liabilities, and Other deferred credits and other liabilities in their respective Consolidated Balance Sheets: September 30, 2023 December 31, 2022 Total environmental Portion of total related to Total environmental Portion of total related to Exelon $ 434 $ 345 $ 409 $ 355 ComEd 312 311 325 324 PECO 28 26 25 23 BGE 9 8 9 8 PHI 82 — 46 — Pepco 80 — 44 — DPL 1 — 1 — ACE 1 — 1 —

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Tables)	9 Months Ended
Changes in Accumulated Other Comprehensive Income (Tables)	Sep. 30, 2023
Changes in Accumulated Other Comprehensive Income [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss)	The following tables present changes in Exelon's AOCI, net of tax, by component: Nine Months Ended September 30, 2023 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance at December 31, 2022 $ 2 $ (640) $ — $ (638) OCI before reclassifications 6 (10) — (4) Amounts reclassified from AOCI — 3 — 3 Net current-period OCI 6 (7) — (1) Balance at March 31, 2023 8 (647) — (639) OCI before reclassifications 9 (3) — 6 Amounts reclassified from AOCI — 3 — 3 Net current-period OCI 9 — — 9 Balance at June 30, 2023 17 (647) — (630) OCI before reclassifications 22 (3) — 19 Amounts reclassified from AOCI (1) 16 — 15 Net current-period OCI 21 13 — 34 Balance at September 30, 2023 $ 38 $ (634) $ — $ (596) Nine Months Ended September 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance at December 31, 2021 $ (6) $ (2,721) $ (23) $ (2,750) Separation of Constellation 6 1,994 23 2,023 Amounts reclassified from AOCI — 14 — 14 Net current-period OCI — 14 — 14 Balance at March 31, 2022 — (713) — (713) OCI before reclassifications — 2 — 2 Amounts reclassified from AOCI — 10 — 10 Net current-period OCI — 12 — 12 Balance at June 30, 2022 — (701) — (701) Amounts reclassified from AOCI — 9 — 9 Net current-period OCI — 9 — 9 Balance at September 30, 2022 $ — $ (692) $ — $ (692) __________
Schedule of Income Taxes Allocated to Other Comprehensive Income (Loss) Components	The following table presents Income tax benefit (expense) allocated to each component of Exelon's Other comprehensive income (loss): Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Pension and non-pension postretirement benefit plans: Actuarial losses reclassified to periodic benefit cost $ (5) $ (3) $ (7) $ (11) Pension and non-pension postretirement benefit plans valuation adjustments 1 — 5 — Unrealized gains on cash flow hedges (7) — (11) —

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	9 Months Ended
Supplemental Financial Information (Tables)	Sep. 30, 2023
Supplemental Financial Information [Abstract]
Taxes Other Than Income Taxes	The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Operations and Comprehensive Income: Taxes other than income taxes Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2023 Utility taxes (a) $ 244 $ 82 $ 50 $ 23 $ 89 $ 82 $ 6 $ 1 Property 104 9 4 53 38 25 12 1 Payroll 31 8 4 5 7 2 1 1 Three Months Ended September 30, 2022 Utility taxes (a) $ 244 $ 84 $ 51 $ 22 $ 87 $ 79 $ 7 $ 1 Property 99 10 4 50 35 23 11 1 Payroll 28 7 5 4 7 2 1 — Nine Months Ended September 30, 2023 Utility taxes (a) $ 665 $ 228 $ 128 $ 73 $ 236 $ 213 $ 20 $ 3 Property 300 27 12 153 108 73 34 1 Payroll 93 22 13 14 22 5 3 3 Nine Months Ended September 30, 2022 Utility taxes (a) $ 667 $ 233 $ 126 $ 70 $ 238 $ 216 $ 19 $ 3 Property 287 30 12 142 103 70 31 2 Payroll 92 21 14 13 21 5 4 2 _________ (a) The Registrants' utility taxes represent municipal and state utility taxes and gross receipts taxes related to their operating revenues. The offsetting collection of utility taxes from customers is recorded in revenues in the Registrants’ Consolidated Statements of Operations and Comprehensive Income.
Schedule of Other Nonoperating Income, by Component	Other, Net Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2023 AFUDC — Equity $ 40 $ 7 $ 10 $ 4 $ 19 $ 15 $ 3 $ 1 Non-service net periodic benefit cost (18) — — — — — — — Three Months Ended September 30, 2022 AFUDC — Equity $ 38 $ 10 $ 7 $ 5 $ 16 $ 12 $ 2 $ 2 Non-service net periodic benefit cost 16 — — — — — — — Nine Months Ended September 30, 2023 AFUDC — Equity $ 113 $ 25 $ 22 $ 11 $ 55 $ 42 $ 7 $ 6 Non-service net periodic benefit cost (18) — — — — — — — Nine Months Ended September 30, 2022 AFUDC — Equity $ 112 $ 28 $ 22 $ 17 $ 45 $ 35 $ 5 $ 5 Non-service net periodic benefit cost 48 — — — — — — —
Schedule of Cash Flow, Supplemental Disclosures	The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Cash Flows. Depreciation, amortization, and accretion Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2023 Property, plant, and equipment (b) $ 2,073 $ 815 $ 287 $ 381 $ 550 $ 232 $ 155 $ 145 Amortization of regulatory assets (b) 537 230 10 106 191 97 27 67 Amortization of intangible assets, net (b) 6 — — — — — — — Total depreciation and amortization $ 2,616 $ 1,045 $ 297 $ 487 $ 741 $ 329 $ 182 $ 212 Nine Months Ended September 30, 2022 Property, plant, and equipment (b) $ 2,024 $ 770 $ 267 $ 355 $ 502 $ 214 $ 141 $ 126 Amortization of regulatory assets (b) 532 212 10 115 195 98 31 66 Amortization of intangible assets, net (b) 10 — — — — — — — Amortization of energy contract assets and liabilities (c) 3 — — — — — — — Nuclear fuel (d) 66 — — — — — — — ARO accretion (e) 44 — — — — — — — Total depreciation, amortization, and accretion $ 2,679 $ 982 $ 277 $ 470 $ 697 $ 312 $ 172 $ 192 __________ (a) Exelon's 2022 amounts include amounts related to Generation prior to the separation. See Note 2 — Discontinued Operations for additional information. (b) Included in Depreciation and amortization in the Registrants' Consolidated Statements of Operations and Comprehensive Income. (c) Included in Electric operating revenues or Purchased power expense in Exelon’s Consolidated Statements of Operations and Comprehensive Income. (d) Included in Purchased fuel expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. (e) Included in Operating and maintenance expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. Other non-cash operating activities Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2023 Pension and OPEB costs (benefit) $ 152 $ 19 $ (10) $ 41 $ 74 $ 26 $ 13 $ 10 Allowance for credit losses 86 4 31 4 47 27 9 11 True-up adjustments to decoupling mechanisms and formula rates (b) (522) (405) (1) (47) (69) (28) (15) (26) Amortization of operating ROU asset 29 2 — 4 21 5 6 2 Change in environmental liabilities 37 — — — 37 37 — — AFUDC — Equity (113) (25) (22) (11) (55) (42) (7) (6) Nine Months Ended September 30, 2022 Pension and OPEB costs (benefit) $ 124 $ 45 $ (6) $ 34 $ 39 $ 6 $ 3 $ 9 Allowance for credit losses 130 40 32 18 42 21 9 12 Other decommissioning-related activity 36 — — — — — — — Energy-related options 60 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (92) (163) (1) 40 33 15 3 14 Long-term incentive plan 35 — — — — — — — Amortization of operating ROU asset 47 1 — 14 21 5 6 3 AFUDC — Equity (112) (28) (22) (17) (45) (35) (5) (5) __________ (a) Exelon's 2022 amounts include amounts related to Generation prior to the separation. See Note 2 — Discontinued Operations for additional information. (b) For ComEd, reflects the true-up adjustments in regulatory assets and liabilities associated with its distribution, energy efficiency, distributed generation, and transmission formula rates. For PECO, reflects the change in regulatory assets and liabilities associated with its transmission formula rates. For BGE, Pepco, DPL, and ACE, reflects the change in regulatory assets and liabilities associated with their decoupling mechanisms and transmission formula rates. See Note 3 — Regulatory Matters of the 2022 Form 10-K for additional information. The following tables provide a reconciliation of cash, cash equivalents, and restricted cash reported within the Registrants’ Consolidated Balance Sheets that sum to the total of the same amounts in their Consolidated Statements of Cash Flows. Cash, cash equivalents, and restricted cash Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at September 30, 2023 Cash and cash equivalents $ 300 $ 79 $ 43 $ 15 $ 121 $ 31 $ 5 $ 14 Restricted cash and cash equivalents 435 360 9 1 25 25 1 — Restricted cash included in Other deferred debits and other assets 212 212 — — — — — — Total cash, restricted cash, and cash equivalents $ 947 $ 651 $ 52 $ 16 $ 146 $ 56 $ 6 $ 14 Balance at December 31, 2022 Cash and cash equivalents $ 407 $ 67 $ 59 $ 43 $ 198 $ 45 $ 31 $ 72 Restricted cash and cash equivalents 566 327 9 24 175 54 121 — Restricted cash included in Other deferred debits and other assets 117 117 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,090 $ 511 $ 68 $ 67 $ 373 $ 99 $ 152 $ 72 Balance at September 30, 2022 Cash and cash equivalents $ 446 $ 63 $ 94 $ 20 $ 219 $ 21 $ 49 $ 112 Restricted cash and cash equivalents 744 342 9 130 234 77 157 — Restricted cash included in Other deferred debits and other assets 83 83 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,273 $ 488 $ 103 $ 150 $ 453 $ 98 $ 206 $ 112 Balance at December 31, 2021 Cash and cash equivalents $ 672 $ 131 $ 36 $ 51 $ 136 $ 34 $ 28 $ 29 Restricted cash and cash equivalents 321 210 8 4 77 34 43 — Restricted cash included in Other deferred debits and other assets 44 43 — — — — — — Cash, restricted cash, and cash equivalents from discontinued operations 582 — — — — — — — Total cash, restricted cash, and cash equivalents $ 1,619 $ 384 $ 44 $ 55 $ 213 $ 68 $ 71 $ 29 For additional information on restricted cash see Note 1 — Significant Accounting Policies of the 2022 Form 10-K.
Consolidated Balance Sheet	The following table provides additional information about material items recorded in the Registrants' Consolidated Balance Sheets. Accrued expenses Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at September 30, 2023 Compensation-related accruals (a) $ 548 $ 162 $ 67 $ 63 $ 99 $ 27 $ 17 $ 14 Taxes accrued 255 148 61 100 120 88 19 13 Interest accrued 391 78 52 59 81 38 24 17 Balance at December 31, 2022 Compensation-related accruals (a) $ 613 $ 179 $ 81 $ 79 $ 104 $ 29 $ 20 $ 16 Taxes accrued 211 92 10 34 70 52 8 12 Interest accrued 338 124 47 42 61 32 9 14 __________ (a) Primarily includes accrued payroll, bonuses and other incentives, vacation, and benefits.

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
Related Party Transactions (Tables)	Sep. 30, 2023
Related Party Transactions [Abstract]
Utility Registrants' expense with Generation	The Utility Registrants incurred expenses from transactions with the Generation affiliate as described in the footnotes to the table below prior to separation on February 1, 2022. Such expenses were primarily recorded as Purchased power from affiliate and an immaterial amount recorded as Operating and maintenance expense from affiliates at the Utility Registrants. Effective February 1, 2022, Generation is no longer considered a related party. Nine Months Ended September 30, 2022 ComEd (a) $ 59 PECO (b) 33 BGE (c) 18 PHI 51 Pepco (d) 39 DPL (e) 10 ACE (f) 2 __________ (a) ComEd had an ICC-approved RFP contract with Generation to provide a portion of ComEd’s electric supply requirements. ComEd also purchased RECs and ZECs from Generation. (b) PECO received electric supply from Generation under contracts executed through PECO’s competitive procurement process. In addition, PECO had a ten-year agreement with Generation to sell solar AECs. (c) BGE received a portion of its energy requirements from Generation under its MDPSC-approved market-based SOS and gas commodity programs. (d) Pepco received electric supply from Generation under contracts executed through Pepco's competitive procurement process approved by the MDPSC and DCPSC. (e) DPL received a portion of its energy requirements from Generation under its MDPSC and DEPSC approved market-based SOS commodity programs. (f) ACE received electric supply from Generation under contracts executed through ACE's competitive procurement process approved by the NJBPU.
BSC and PHISCO Service Companies	The following table presents the service company costs allocated to the Registrants: Operating and maintenance from affiliates Capitalized costs Three Months Ended September 30, Nine Months Ended September 30, Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 2023 2022 2023 2022 Exelon BSC $ 162 $ 156 $ 502 $ 500 PHISCO 25 20 74 60 ComEd BSC $ 92 $ 69 $ 263 $ 234 71 70 230 222 PECO BSC 55 44 160 140 29 24 89 80 BGE BSC 58 46 166 148 23 26 69 86 PHI BSC 50 39 135 135 39 36 114 112 PHISCO — — — — 24 20 73 60 Pepco BSC 30 24 85 80 13 13 41 41 PHISCO 31 28 91 86 9 8 30 24 DPL BSC 19 16 54 51 12 11 32 34 PHISCO 24 24 73 73 7 7 22 20 ACE BSC 16 13 45 42 13 12 39 37 PHISCO 23 20 67 63 7 5 20 16
Current Receivables From/Payables To Affiliates	The following tables present current Receivables from affiliates and current Payables to affiliates: September 30, 2023 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 57 $ — $ 5 $ 62 PECO $ — — — — — 31 — 6 37 BGE — — — — — 31 — 2 33 PHI — — — — — — 6 — 11 17 Pepco — — — — — 16 15 1 32 DPL — 1 — — — 13 11 — 25 ACE — — — — — 11 10 1 22 Other 3 — — — — 3 (1) 1 6 Total $ 3 $ 1 $ — $ — $ — $ 3 $ 164 $ 37 $ 26 $ 234 December 31, 2022 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 66 $ — $ 8 $ 74 PECO $ — — — — — 39 — 3 42 BGE — — — — — 38 — 1 39 PHI — — — — — — 4 — 10 14 Pepco — — — — — 20 13 1 34 DPL — 2 — — — 12 8 — 22 ACE — 2 — — — 14 9 1 26 Other 3 — — — — 1 — — 4 Total $ 3 $ 4 $ — $ — $ — $ 1 $ 193 $ 30 $ 24 $ 255
Long Term Debt to Financing Trusts	The following table presents Long-term debt to financing trusts: September 30, 2023 December 31, 2022 Exelon ComEd PECO Exelon ComEd PECO ComEd Financing III $ 206 $ 205 $ — $ 206 $ 205 $ — PECO Trust III 81 — 81 81 — 81 PECO Trust IV 103 — 103 103 — 103 Total $ 390 $ 205 $ 184 $ 390 $ 205 $ 184

Discontinued Operations and Dis

Discontinued Operations and Disposal Groups (Details) - Narrative - USD ($) $ in Millions	3 Months Ended		8 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Feb. 01, 2022
Discontinued Operations - Income Statement
Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Expense	$ 33	$ 68	$ 193	$ 127
Operating and maintenance	1,187	1,148		3,535	$ 3,436
Total other income and (deductions)	(356)	(243)		(946)	(628)
Net income from discontinued operations	0	0		0	116
Income taxes	67	92		274	356
Other, net	81	122		331	435
Net income attributable to noncontrolling interests	0	0		0	1
Taxes, Miscellaneous	383	377		1,063	1,061
Total operating revenues	5,980	4,845		16,360	14,412
Cost, Depreciation and Amortization	890	825		2,616	2,472
Total operating expenses	4,857	3,834		13,429	11,804
Net income from discontinued operations after income taxes (Note 2)	0	0		0	117
Total liabilities	73,789			73,789		$ 70,605
Total assets	99,259			99,259		95,349
Decrease in capital expenditures not paid				(169)	(147)
Collection of deferred purchase price				0	169
Other non-cash operating activities				237	(265)
Unrealized Gain (Loss) on Derivatives				(21)	59
Capital expenditures				5,540	5,179
Depreciation and amortization				2,616	2,679
Gain (Loss) on Investments				0	(205)
Deferred income taxes and amortization of investment tax credits				210	256
Increase in DPP				0	348
Gain (Loss) on Sale of Assets and Asset Impairment Charges				0	8
Net unrealized losses on equity investments				0	(16)
Exelon Generation Co L L C
Discontinued Operations - Income Statement
Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Expense	4	12	$ 32	13
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	0		0	78
Electric operating revenues	0	0		0	1,855
Purchased power and/or fuel	0	0		0	1,138
Gain (Loss) on Disposition of Assets	0	0		0	10
Disposal Group, Including Discontinued Operation, Interest Expense	0	0		0	20
Operating and maintenance	0	0		0	371
Total other income and (deductions)	0	0		0	(301)
Net income from discontinued operations	0	0		0	116
Income taxes	0	0		0	(40)
Other, net	0	0		0	(281)
Net income attributable to noncontrolling interests	0	0		0	1
Taxes, Miscellaneous	0	0		0	44
Income (Loss) from Equity Method Investments	0	0		0	(1)
Cost, Depreciation and Amortization	0	0		0	94
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	0	0		0	379
Total operating expenses	0	0		0	1,647
Net income from discontinued operations after income taxes (Note 2)	0	0		0	117
Disposal Group, Including Discontinued Operation, Revenue	0	0		0	2,016
Total liabilities	0			0		0
Total assets	0			0		$ 0
Net assets							$ (11,573)
Decrease in capital expenditures not paid				0	(128)
Collection of deferred purchase price				0	169
Other non-cash operating activities				0	36
Increase in PPE related to ARO update				0	335
Unrealized Gain (Loss) on Derivatives				0	59
Capital expenditures				0	227
Depreciation and amortization				0	207
Gain (Loss) on Investments				0	(205)
Deferred income taxes and amortization of investment tax credits				0	(143)
Increase in DPP				0	348
Gain (Loss) on Sale of Assets and Asset Impairment Charges				0	(9)
Net unrealized losses on equity investments				0	(16)
Exelon Generation Co L L C \| Related Party
Discontinued Operations - Income Statement
Operating revenues from affiliates	$ 0	$ 0		$ 0	$ 161

Discontinued Operations and D_2

Discontinued Operations and Disposal Groups (Details) - Income Statement - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Discontinued Operations - Income Statement
Operating and maintenance	$ 1,187	$ 1,148	$ 3,535	$ 3,436
Cost, Depreciation and Amortization	890	825	2,616	2,472
Taxes, Miscellaneous	383	377	1,063	1,061
Total operating expenses	4,857	3,834	13,429	11,804
Other, net	81	122	331	435
Total other income and (deductions)	(356)	(243)	(946)	(628)
Income taxes	67	92	274	356
Net income from discontinued operations after income taxes (Note 2)	0	0	0	117
Net income attributable to noncontrolling interests	0	0	0	1
Net income from discontinued operations	0	0	0	116
Total transaction and transition costs incurred related to the Separation				52
Exelon Generation Co L L C
Discontinued Operations - Income Statement
Electric operating revenues	0	0	0	1,855
Disposal Group, Including Discontinued Operation, Revenue	0	0	0	2,016
Purchased power and/or fuel	0	0	0	1,138
Operating and maintenance	0	0	0	371
Cost, Depreciation and Amortization	0	0	0	94
Taxes, Miscellaneous	0	0	0	44
Total operating expenses	0	0	0	1,647
Gain (Loss) on Disposition of Assets	0	0	0	10
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	0	0	0	379
Disposal Group, Including Discontinued Operation, Interest Expense	0	0	0	(20)
Other, net	0	0	0	(281)
Total other income and (deductions)	0	0	0	(301)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	0	0	78
Income taxes	0	0	0	(40)
Income (Loss) from Equity Method Investments	0	0	0	(1)
Net income from discontinued operations after income taxes (Note 2)	0	0	0	117
Net income attributable to noncontrolling interests	0	0	0	1
Net income from discontinued operations	0	0	0	116
Exelon Generation Co L L C \| Related Party
Discontinued Operations - Income Statement
Operating revenues from affiliates	$ 0	$ 0	$ 0	$ 161

Discontinued Operations and D_3

Discontinued Operations and Disposal Groups (Details) - Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Discontinued Operations - Income Statement
Depreciation and amortization	$ 2,616	$ 2,679
Gain (Loss) on Sale of Assets and Asset Impairment Charges	0	(8)
Deferred income taxes and amortization of investment tax credits	210	256
Net fair value changes related to derivatives	21	(59)
Net realized and unrealized (gains) losses on NDT funds	0	205
Net unrealized (gains) losses on equity investments	0	16
Other non-cash operating activities	237	(265)
Capital expenditures	(5,540)	(5,179)
Collection of deferred purchase price	0	169
Decrease in capital expenditures not paid	(169)	(147)
Increase in DPP	0	348
Exelon Generation Co L L C
Discontinued Operations - Income Statement
Depreciation and amortization	0	207
Gain (Loss) on Sale of Assets and Asset Impairment Charges	0	9
Deferred income taxes and amortization of investment tax credits	0	(143)
Net fair value changes related to derivatives	0	(59)
Net realized and unrealized (gains) losses on NDT funds	0	205
Net unrealized (gains) losses on equity investments	0	16
Other non-cash operating activities	0	36
Capital expenditures	0	(227)
Collection of deferred purchase price	0	169
Decrease in capital expenditures not paid	0	(128)
Increase in DPP	0	348
Increase in PPE related to ARO update	$ 0	$ 335

Regulatory Matters - Narrative

Regulatory Matters - Narrative (Details)				9 Months Ended		36 Months Ended	48 Months Ended
Regulatory Matters - Narrative (Details)	Jan. 17, 2023 USD ($)	Sep. 27, 2022	Feb. 03, 2022	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2027 USD ($)	Jun. 30, 2027 USD ($)	Mar. 31, 2022 USD ($)
Commonwealth Edison Co
Regulatory Matters Additional Narrative Information [Line Items]
Basis points for ComEd's Revenue Requirement			580
Maximum increase of revenue requirement				105%
Basis Points - ComEd Symmetrical Performance Adjustments		32
Increase (Decrease) in Regulatory Assets				$ 733,000,000
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case
Regulatory Matters Additional Narrative Information [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 1,487,000,000
Commonwealth Edison Co \| 2023 \| Illinois 2023 Electric Distribution Base Rate Case \| Subsequent Event [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 317,000,000
Commonwealth Edison Co \| Forecast [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Initial requested revenue increase 2024-2027							1,472,000,000
Current requested revenue increase 2024-2027							$ 1,545,000,000
Beneficial electrification approved annual spending						$ 77,000,000
Commonwealth Edison Co \| Carbon Mitigation Credit rider
Regulatory Matters Additional Narrative Information [Line Items]
Regulatory Assets				862,000,000
Increase (Decrease) in Regulatory Assets				171,000,000
Commonwealth Edison Co \| Electric Distribution Formula Rate Annual Reconciliations
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				392,000,000
Commonwealth Edison Co \| ZEC regulatory asset
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				97,000,000
PECO Energy Co
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				150,000,000
Increase (Decrease) in Regulatory Liabilities				6,000,000
PECO Energy Co \| Nuclear Decommissioning [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities				31,000,000
PECO Energy Co \| Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities				49,000,000
PECO Energy Co \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				118,000,000
Baltimore Gas and Electric Company
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				114,000,000
Baltimore Gas and Electric Company \| Removal Costs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				38,000,000
Baltimore Gas and Electric Company \| Under-recovered revenue decoupling
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				35,000,000
Potomac Electric Power Company
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				(63,000,000)
Increase (Decrease) in Regulatory Liabilities				(43,000,000)
Potomac Electric Power Company \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities				(52,000,000)
Potomac Electric Power Company \| Electric Energy Costs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				(35,000,000)
Delmarva Power and Light Company
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				(17,000,000)
Increase (Decrease) in Regulatory Liabilities				(1,000,000)
Delmarva Power and Light Company \| Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities				13,000,000
Delmarva Power and Light Company \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities				(23,000,000)
Delmarva Power and Light Company \| Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				(26,000,000)
Atlantic City Electric Company
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability				71,000,000					$ 203,000,000
Gain (Loss) on Contract Termination				65,000,000	$ 45,000,000
Increase (Decrease) in Regulatory Assets				(21,000,000)
Increase (Decrease) in Regulatory Liabilities				(29,000,000)
Atlantic City Electric Company \| Forecast [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Approved Capital Expenditure								$ 379,000,000
Approved Revenue Requirement Increase (Decrease)								$ 93,000,000
Atlantic City Electric Company \| Other Current Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability				61,000,000
Atlantic City Electric Company \| Other Noncurrent Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability				10,000,000
Atlantic City Electric Company \| Electric Energy Costs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets				(65,000,000)
Atlantic City Electric Company \| Over-recovered revenue decoupling
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities				(9,000,000)
Atlantic City Electric Company \| Stranded Costs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities				$ (9,000,000)

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Completed Rate Cases (Details) $ in Millions

Dec. 14, 2022 USD ($)

Nov. 17, 2022 USD ($)

Oct. 27, 2022 USD ($)

May 19, 2022 USD ($)

Apr. 15, 2022 USD ($)

Mar. 31, 2022 USD ($)

Feb. 23, 2022

Feb. 03, 2022

Dec. 22, 2021

Jun. 28, 2021 USD ($)

Mar. 31, 2021 USD ($)

Dec. 16, 2020 USD ($)

Sep. 11, 2020 USD ($)

Commonwealth Edison Co

Regulatory Matters Completed Rate Cases [Line Items]

Basis points for ComEd's Revenue Requirement

580

Commonwealth Edison Co | Illinois 2022 Electric Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

Requested Revenue Requirement Increase (Decrease)

$ 199

Approved Revenue Requirement Increase (Decrease)

$ 199

Approved Return on Equity, Percentage

7.85%

Commonwealth Edison Co | Illinois 2022 Electric Distribution Base Rate Case | 2021

Regulatory Matters Completed Rate Cases [Line Items]

Approved Return on Equity, Percentage

7.78%

Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation

$ 55

Public Utilities, Approved Equity Capital Structure, Percentage

5.91%

Basis points for ComEd's Revenue Requirement

580

Commonwealth Edison Co | Illinois 2022 Electric Distribution Base Rate Case | 2023

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 144

Approved Return on Equity, Percentage

7.85%

Public Utilities, Approved Equity Capital Structure, Percentage

5.94%

Basis points for ComEd's Revenue Requirement

580

Commonwealth Edison Co | Illinois 2022 Electric Distribution Base Rate Case | Performance Metrics Penalty | 2021

Regulatory Matters Completed Rate Cases [Line Items]

Basis points for ComEd's Revenue Requirement

PECO Energy Co | Pennsylvania 2022 Natural Gas Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

Requested Revenue Requirement Increase (Decrease)

$ 82

Approved Revenue Requirement Increase (Decrease)

$ 55

Baltimore Gas and Electric Company | Maryland 2020 Electric Distribution Base Rate Case [Member]

Regulatory Matters Completed Rate Cases [Line Items]

Public Utilities, Requested Rate Increase (Decrease), Amended, Amount

$ 203

Approved Revenue Requirement Increase (Decrease)

$ 140

Approved Return on Equity, Percentage

9.50%

Baltimore Gas and Electric Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | 2021

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 59

Baltimore Gas and Electric Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

Baltimore Gas and Electric Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | 2023

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

Baltimore Gas and Electric Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | Offsets | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Public Utilities, Approved Rate Increase (Decrease), Percentage

25%

Baltimore Gas and Electric Company | Maryland 2020 Natural Gas Distribution Base Rate Case [Member]

Regulatory Matters Completed Rate Cases [Line Items]

Public Utilities, Requested Rate Increase (Decrease), Amended, Amount

$ 108

Approved Revenue Requirement Increase (Decrease)

$ 74

Approved Return on Equity, Percentage

9.65%

Baltimore Gas and Electric Company | Maryland 2020 Natural Gas Distribution Base Rate Case [Member] | 2021

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 53

Baltimore Gas and Electric Company | Maryland 2020 Natural Gas Distribution Base Rate Case [Member] | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

Baltimore Gas and Electric Company | Maryland 2020 Natural Gas Distribution Base Rate Case [Member] | 2023

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 10

Baltimore Gas and Electric Company | Maryland 2020 Natural Gas Distribution Base Rate Case [Member] | Offsets | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Public Utilities, Approved Rate Increase (Decrease), Percentage

50%

Potomac Electric Power Company | Maryland 2020 Electric Distribution Base Rate Case [Member]

Regulatory Matters Completed Rate Cases [Line Items]

Public Utilities, Requested Rate Increase (Decrease), Amended, Amount

$ 104

Approved Revenue Requirement Increase (Decrease)

$ 52

Approved Return on Equity, Percentage

9.55%

Potomac Electric Power Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 21

Potomac Electric Power Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | 2023

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

Potomac Electric Power Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | 2024

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 15

Potomac Electric Power Company | Maryland 2020 Electric Distribution Base Rate Case [Member] | Offsets | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Public Utilities, Approved Rate Increase (Decrease), Percentage

25%

Delmarva Power and Light Company | Maryland 2022 Electric Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

Requested Revenue Requirement Increase (Decrease)

$ 38

Approved Revenue Requirement Increase (Decrease)

$ 29

Approved Return on Equity, Percentage

9.60%

Delmarva Power and Light Company | Maryland 2022 Electric Distribution Base Rate Case | 2023

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 17

Delmarva Power and Light Company | Maryland 2022 Electric Distribution Base Rate Case | 2024

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

Delmarva Power and Light Company | Maryland 2022 Electric Distribution Base Rate Case | 2025

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 6

Regulatory Matters - Schedule_2

Regulatory Matters - Schedule of Pending Rate Cases (Details) - USD ($)								3 Months Ended		9 Months Ended
	Sep. 29, 2023	Aug. 21, 2023	May 16, 2023	Apr. 21, 2023	Apr. 13, 2023	Feb. 17, 2023	Jan. 17, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)							$ 1,487,000,000
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount							$ 520,000,000
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case \| Minimum [Member]
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities, Requested Equity Capital Structure, Percentage							50.58%
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case \| Maximum [Member]
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities, Requested Equity Capital Structure, Percentage							51.19%
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Return on Equity, Percentage							10.50%
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount							$ 968,000,000
Public Utilities, Requested Equity Capital Structure, Percentage							7.40%
Public Utilities, Requested Rate Increase (Decrease), Proposed Revenue Requirement Phase-In							$ 339,000,000
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Return on Equity, Percentage							10.55%
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount							$ 181,000,000
Public Utilities, Requested Equity Capital Structure, Percentage							7.47%
Public Utilities, Requested Rate Increase (Decrease), Proposed Revenue Requirement Phase-In							$ 52,000,000
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Return on Equity, Percentage							10.60%
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount							$ 163,000,000
Public Utilities, Requested Equity Capital Structure, Percentage							7.58%
Public Utilities, Requested Rate Increase (Decrease), Proposed Revenue Requirement Phase-In							$ 75,000,000
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case \| 2027
Regulatory Matters Pending Rate Cases [Line Items]
Requested Return on Equity, Percentage							10.65%
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount							$ 175,000,000
Public Utilities, Requested Equity Capital Structure, Percentage							7.65%
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Base Rate Case \| 2028
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount							$ 215,000,000
Commonwealth Edison Co \| Illinois 2023 Electric Distribution Reconciliation Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation				$ 247,000,000
Requested Return on Equity, Percentage				8.91%
Baltimore Gas and Electric Company \| Maryland 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						$ 313,000,000
Requested Return on Equity, Percentage						10.40%
Baltimore Gas and Electric Company \| Maryland 2023 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						$ 85,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						103,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Electric Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						125,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Gas Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						$ 289,000,000
Requested Return on Equity, Percentage						10.40%
Baltimore Gas and Electric Company \| Maryland 2023 Gas Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						$ 158,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Gas Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						77,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Gas Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)						$ 54,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Electric Distribution Reconciliation Rate Case \| 2021
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)									$ 11,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Electric Distribution Reconciliation Rate Case \| 2022
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)								$ 44,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Gas Distribution Reconciliation Rate Case \| 2021
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)									$ 7,000,000
Baltimore Gas and Electric Company \| Maryland 2023 Gas Distribution Reconciliation Rate Case \| 2022
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)								$ 15,000,000		$ 25,000,000
Potomac Electric Power Company \| District of Columbia 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 191,000,000
Requested Return on Equity, Percentage					10.50%
Potomac Electric Power Company \| District of Columbia 2023 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 117,000,000
Potomac Electric Power Company \| District of Columbia 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					37,000,000
Potomac Electric Power Company \| District of Columbia 2023 Electric Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 37,000,000
Potomac Electric Power Company \| Pepco Maryland 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			$ 214,000,000
Requested Return on Equity, Percentage			10.50%
Potomac Electric Power Company \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			$ 74,000,000
Potomac Electric Power Company \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			60,000,000
Potomac Electric Power Company \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			60,000,000
Potomac Electric Power Company \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2027
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			$ 20,000,000
Delmarva Power and Light Company \| Delaware DE 2022 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease), Amended	$ 39,000,000
Requested Return on Equity, Percentage	10.50%
Atlantic City Electric Company \| New Jersey 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease), Amended		$ 92,000,000
Requested Return on Equity, Percentage		10.50%

Regulatory Matters - Annual Ele

Regulatory Matters - Annual Electric Transmission Fillings (Details) - USD ($) $ in Millions	May 30, 2023	May 12, 2023	Apr. 25, 2023
Commonwealth Edison Co \| 2023 Transmission Formula Rate Annual Update [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 20
Annual Reconciliation Increase		63
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 83
Public Utilities, Approved Equity Capital Structure, Percentage		8.09%
Public Utilities, Approved Return on Equity, Percentage		11.50%
Cap on Equity Component of Rate of Return on Common Equity in Federal Energy Regulatory Committee Complaint		55%
Basis points for Transmission Formula Rate		50
PECO Energy Co \| 2023 Transmission Formula Rate Annual Update [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 24
Annual Reconciliation Increase			23
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount			$ 47
Public Utilities, Approved Equity Capital Structure, Percentage			7.41%
Public Utilities, Approved Return on Equity, Percentage			10.35%
Cap on Equity Component of Rate of Return on Common Equity in Federal Energy Regulatory Committee Complaint	55.75%
Basis points for Transmission Formula Rate	50
Baltimore Gas and Electric Company \| 2023 Transmission Formula Rate Annual Update [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 19
Annual Reconciliation Increase			(12)
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount			$ 4
Public Utilities, Approved Equity Capital Structure, Percentage			7.34%
Public Utilities, Approved Return on Equity, Percentage			10.50%
Basis points for Transmission Formula Rate			50
Baltimore Gas and Electric Company \| 2023 Transmission Formula Rate Revenue Reduction
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount			$ 3
Potomac Electric Power Company \| 2023 Transmission Formula Rate Annual Update [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 37
Annual Reconciliation Increase		(5)
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 32
Public Utilities, Approved Equity Capital Structure, Percentage		7.57%
Public Utilities, Approved Return on Equity, Percentage		10.50%
Basis points for Transmission Formula Rate		50
Delmarva Power and Light Company \| 2023 Transmission Formula Rate Annual Update [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 32
Annual Reconciliation Increase		(3)
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 29
Public Utilities, Approved Equity Capital Structure, Percentage		7.08%
Public Utilities, Approved Return on Equity, Percentage		10.50%
Basis points for Transmission Formula Rate		50
Atlantic City Electric Company \| 2023 Transmission Formula Rate Annual Update [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 41
Annual Reconciliation Increase		(12)
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 29
Public Utilities, Approved Equity Capital Structure, Percentage		7.08%
Public Utilities, Approved Return on Equity, Percentage		10.50%
Basis points for Transmission Formula Rate		50

Regulatory Matters - Energy Eff

Regulatory Matters - Energy Efficiency Formula Rate (Details) - Commonwealth Edison Co $ in Millions			12 Months Ended
	May 26, 2023 USD ($)	Feb. 03, 2022	Dec. 31, 2022
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Basis points for ComEd's Revenue Requirement		580
ComEd 2023 Energy Efficiency Formula Rate [Domain]
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 87
Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation	31
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount	$ 118
Public Utilities, Requested Equity Capital Structure, Percentage	6.48%
Requested Return on Equity, Percentage	8.91%
Basis points for ComEd's Revenue Requirement	580
ComEd 2022 Energy Efficiency Formula Rate [Domain]
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Public Utilities, Approved Equity Capital Structure, Percentage			7.48%
Public Utilities, Approved Return on Equity, Percentage			10.91%

Regulatory Matters - Capitalize

Regulatory Matters - Capitalized Ratemaking Amount Not Recognized (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	$ 81	$ 57
Commonwealth Edison Co
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	25	8
PECO Energy Co
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	0	0
Baltimore Gas and Electric Company
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	21	28
Pepco Holdings LLC
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	35	21
Potomac Electric Power Company
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	27	18
Delmarva Power and Light Company
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	1	2
Atlantic City Electric Company
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	$ 7	$ 1

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Change in Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Contract Liabilities [Roll Forward]
Beginning Balance - Contract Liabilities	$ 98	$ 100	$ 101	$ 105	$ 107	$ 109
Revenues recognized	(2)	(2)	(1)	(2)	(2)	(2)
Ending Balance - Contract Liabilities	96	98	100	103	105	107
Pepco Holdings LLC
Contract Liabilities [Roll Forward]
Beginning Balance - Contract Liabilities	98	100	101	105	107	109
Revenues recognized	(2)	(2)	(1)	(2)	(2)	(2)
Ending Balance - Contract Liabilities	96	98	100	103	105	107
Potomac Electric Power Company
Contract Liabilities [Roll Forward]
Beginning Balance - Contract Liabilities	78	80	81	84	85	87
Revenues recognized	(1)	(2)	(1)	(1)	(1)	(2)
Ending Balance - Contract Liabilities	77	78	80	83	84	85
Delmarva Power and Light Company
Contract Liabilities [Roll Forward]
Beginning Balance - Contract Liabilities	10	10	10	11	11	11
Revenues recognized	0	0	0	(1)	0	0
Ending Balance - Contract Liabilities	10	10	10	10	11	11
Atlantic City Electric Company
Contract Liabilities [Roll Forward]
Beginning Balance - Contract Liabilities	10	10	10	10	11	11
Revenues recognized	(1)	0	0	0	(1)	0
Ending Balance - Contract Liabilities	$ 9	$ 10	$ 10	$ 10	$ 10	$ 11

Revenue from Contract with Cust

Revenue from Contract with Customer - Performance Obligations (Details) $ in Millions	Sep. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 96
Pepco Holdings LLC
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	96
Potomac Electric Power Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	77
Delmarva Power and Light Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	10
Atlantic City Electric Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 2
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 \| Pepco Holdings LLC
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 2
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 \| Potomac Electric Power Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 2
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 \| Delmarva Power and Light Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 \| Atlantic City Electric Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 1
Revenue, remaining performance obligation, expected timing of satisfaction, period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 6
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 \| Pepco Holdings LLC
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 6
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 \| Potomac Electric Power Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 \| Delmarva Power and Light Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 \| Atlantic City Electric Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Pepco Holdings LLC
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Potomac Electric Power Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Delmarva Power and Light Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 \| Atlantic City Electric Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Pepco Holdings LLC
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Potomac Electric Power Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 5
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Delmarva Power and Light Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 \| Atlantic City Electric Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 78
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Pepco Holdings LLC
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 78
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Potomac Electric Power Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 60
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Delmarva Power and Light Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 10
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 \| Atlantic City Electric Company
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 8
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
Segment Information - Narrative (Details)	Sep. 30, 2023 Reportable_segment
Segment Reporting Information [Line Items]
Number of reportable segments	6
Pepco Holdings LLC
Segment Reporting Information [Line Items]
Number of reportable segments	3

Segment Information - Reconcili

Segment Information - Reconciliation to Consolidated Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total operating revenues	$ 5,980			$ 4,845			$ 16,360	$ 14,412
Income (loss) from continuing operations before income taxes:	767			768			1,985	1,978
Income taxes	67			92			274	356
Net income (loss):	700	$ 343	$ 669	676	$ 465	$ 598	1,711	1,739
Net income (loss) from continuing operations:	700			676			1,711	1,622
Capital expenditures							5,540	5,179
Total assets	99,259						99,259		$ 95,349
Pepco Holdings LLC
Segment Reporting Information [Line Items]
Total operating revenues	1,773			1,598			4,615	4,223
Income (loss) from continuing operations before income taxes:	281			291			593	528
Income taxes	49			2			103	10
Net income (loss):	232	$ 103	$ 155	289	$ 100	$ 130	490	518
Capital expenditures							1,510	1,174
Total assets	26,656						26,656		26,082
Related Party
Segment Reporting Information [Line Items]
Interest expense, net	6			6			18	19
Related Party \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Operating revenues from affiliates	2			3			7	9
Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	5,980			4,845			16,360	14,412
Depreciation and amortization	890			825			2,616	2,472
Operating expenses	4,857			3,834			13,429	11,804
Interest expense, net	437			365			1,277	1,063
Income (loss) from continuing operations before income taxes:	767			768			1,985	1,978
Income taxes	67			92			274	356
Net income (loss) from continuing operations:	700			676			1,711	1,622
Capital expenditures	1,855			1,672			5,540	4,952
Total assets	99,259						99,259		95,349
Operating Segment \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	0			0			0	6
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total operating revenues	(475)			(396)			(1,370)	(1,376)
Depreciation and amortization	0			0			0	0
Operating expenses	(478)			(380)			(1,367)	(1,288)
Interest expense, net	0			0			(4)	0
Income (loss) from continuing operations before income taxes:	(16)			0			(21)	(42)
Income taxes	0			0			1	(9)
Net income (loss) from continuing operations:	(15)			(1)			(22)	(33)
Capital expenditures	0			0			0	0
Total assets	(4,172)						(4,172)		(4,260)
Intersegment Eliminations \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Total operating revenues	(104)			(94)			(314)	(290)
Depreciation and amortization	0			0			0	0
Operating expenses	(103)			(95)			(314)	(290)
Interest expense, net	(1)			1			2	1
Income (loss) from continuing operations before income taxes:	(1)			0			0	0
Income taxes	0			0			0	0
Net income (loss):	0			0			0	0
Capital expenditures	0			0			0	0
Total assets	(74)						(74)		(33)
Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	(458)			(393)			(1,343)	(1,377)
Intersegment Eliminations \| Related Party \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Operating revenues from affiliates	(104)			(94)			(313)	(290)
Commonwealth Edison Co \| Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	2,268			1,378			5,836	4,536
Depreciation and amortization	357			333			1,045	982
Operating expenses	1,738			913			4,472	3,357
Interest expense, net	119			104			357	308
Income (loss) from continuing operations before income taxes:	427			375			1,057	909
Income taxes	94			84			235	203
Net income (loss) from continuing operations:	333			291			822	706
Capital expenditures	664			593			1,926	1,801
Total assets	42,042						42,042		39,661
Commonwealth Edison Co \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	9			6			14	14
PECO Energy Co \| Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	1,037			1,014			2,977	2,877
Depreciation and amortization	100			92			297	277
Operating expenses	847			798			2,436	2,230
Interest expense, net	52			45			149	129
Income (loss) from continuing operations before income taxes:	149			179			418	541
Income taxes	3			44			8	67
Net income (loss) from continuing operations:	146			135			410	474
Capital expenditures	361			333			1,068	991
Total assets	15,259						15,259		14,502
PECO Energy Co \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	2			3			6	5
Baltimore Gas and Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	932			870			2,986	2,810
Depreciation and amortization	161			148			487	470
Operating expenses	835			810			2,503	2,446
Interest expense, net	47			39			135	110
Income (loss) from continuing operations before income taxes:	56			26			362	270
Income taxes	11			(7)			76	3
Net income (loss) from continuing operations:	45			33			286	267
Capital expenditures	330			340			986	918
Total assets	13,649						13,649		13,350
Baltimore Gas and Electric Company \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	2			3			6	13
Pepco Holdings LLC \| Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	1,773			1,598			4,615	4,223
Depreciation and amortization	257			238			741	697
Operating expenses	1,440			1,254			3,864	3,535
Interest expense, net	80			72			238	216
Income (loss) from continuing operations before income taxes:	281			291			593	528
Income taxes	49			2			103	10
Net income (loss):	232			289			490	518
Net income (loss) from continuing operations:	232			289			490	518
Capital expenditures	488			398			1,510	1,174
Total assets	26,656						26,656		26,082
Pepco Holdings LLC \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	2			3			7	9
Potomac Electric Power Company \| Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	822			724			2,174	1,919
Depreciation and amortization	112			99			329	312
Operating expenses	658			555			1,810	1,588
Interest expense, net	41			37			122	111
Income (loss) from continuing operations before income taxes:	141			146			292	259
Income taxes	21			1			43	(2)
Net income (loss):	120			145			249	261
Capital expenditures	227			193			710	595
Total assets	11,061						11,061		10,657
Potomac Electric Power Company \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	1			2			5	4
Delmarva Power and Light Company \| Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	450			412			1,273	1,176
Depreciation and amortization	62			59			182	172
Operating expenses	386			345			1,079	999
Interest expense, net	18			16			53	48
Income (loss) from continuing operations before income taxes:	51			54			153	138
Income taxes	8			2			25	8
Net income (loss):	43			52			128	130
Capital expenditures	158			100			416	294
Total assets	5,870						5,870		5,802
Delmarva Power and Light Company \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	2			1			5	5
Atlantic City Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Total operating revenues	502			462			1,172	1,120
Depreciation and amortization	77			74			212	192
Operating expenses	394			353			971	947
Interest expense, net	19			17			52	49
Income (loss) from continuing operations before income taxes:	94			95			162	133
Income taxes	23			1			40	2
Net income (loss):	71			94			122	131
Capital expenditures	101			105			376	284
Total assets	5,155						5,155		4,979
Atlantic City Electric Company \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	0			0			1	2
Corporate and Other \| Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total operating revenues	445			381			1,316	1,342
Depreciation and amortization	15			14			46	46
Operating expenses	475			439			1,521	1,524
Interest expense, net	139			105			402	300
Income (loss) from continuing operations before income taxes:	(130)			(103)			(424)	(228)
Income taxes	(90)			(31)			(149)	82
Net income (loss) from continuing operations:	(41)			(71)			(275)	(310)
Capital expenditures	12			8			50	68
Total assets	5,825						5,825		6,014
Corporate and Other \| Corporate, Non-Segment \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Total operating revenues	103			94			310	298
Depreciation and amortization	6			6			18	21
Operating expenses	105			96			318	291
Interest expense, net	3			1			9	7
Income (loss) from continuing operations before income taxes:	(4)			(4)			(14)	(2)
Income taxes	(3)			(2)			(5)	2
Net income (loss):	(2)			(2)			(9)	(4)
Capital expenditures	2			0			8	1
Total assets	4,644						4,644		$ 4,677
Corporate and Other \| Intersegment Eliminations \| Related Party
Segment Reporting Information [Line Items]
Operating revenues from affiliates	443			378			1,310	1,342
Corporate and Other \| Intersegment Eliminations \| Related Party \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Operating revenues from affiliates	103			94			309	288
Rate-regulated electric revenues
Segment Reporting Information [Line Items]
Electric operating revenues	5,684			4,557			14,579	12,972
Rate-regulated electric revenues \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	1,762			1,568			4,399	4,090
Rate-regulated electric revenues \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	5,793			4,621			15,056	13,082
Rate-regulated electric revenues \| Intersegment Eliminations
Segment Reporting Information [Line Items]
Electric operating revenues	(28)			(12)			(45)	(24)
Rate-regulated electric revenues \| Intersegment Eliminations \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	(3)			(3)			(11)	0
Rate-regulated electric revenues \| Commonwealth Edison Co \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	2,268			1,378			5,836	4,536
Rate-regulated electric revenues \| PECO Energy Co \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	970			941			2,484	2,390
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	836			757			2,322	2,122
Rate-regulated electric revenues \| Pepco Holdings LLC \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	1,747			1,557			4,459	4,058
Rate-regulated electric revenues \| Potomac Electric Power Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	822			724			2,174	1,919
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	426			374			1,123	1,019
Rate-regulated electric revenues \| Atlantic City Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	502			462			1,172	1,120
Rate-regulated electric revenues \| Corporate and Other \| Corporate, Non-Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Rate-regulated electric revenues \| Corporate and Other \| Corporate, Non-Segment \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			1	0
Rate-regulated natural gas revenues
Segment Reporting Information [Line Items]
Electric operating revenues	188			224			1,268	1,348
Rate-regulated natural gas revenues \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	24			38			150	157
Rate-regulated natural gas revenues \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	187			224			1,304	1,330
Rate-regulated natural gas revenues \| Intersegment Eliminations
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			(3)	(2)
Rate-regulated natural gas revenues \| Intersegment Eliminations \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Rate-regulated natural gas revenues \| PECO Energy Co \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	67			73			493	487
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	96			113			664	688
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	24			38			150	157
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	24			38			150	157
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Rate-regulated natural gas revenues \| Corporate and Other \| Corporate, Non-Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Rate-regulated natural gas revenues \| Corporate and Other \| Corporate, Non-Segment \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| Intersegment Eliminations
Segment Reporting Information [Line Items]
Electric operating revenues	(447)			(384)			(1,322)	(1,350)
Shared service and other revenues \| Intersegment Eliminations \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	(101)			(91)			(303)	(290)
Shared service and other revenues \| Commonwealth Edison Co \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| PECO Energy Co \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| Baltimore Gas and Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| Pepco Holdings LLC \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	2			3			6	8
Shared service and other revenues \| Potomac Electric Power Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| Delmarva Power and Light Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| Atlantic City Electric Company \| Operating Segment
Segment Reporting Information [Line Items]
Electric operating revenues	0			0			0	0
Shared service and other revenues \| Corporate and Other \| Corporate, Non-Segment
Segment Reporting Information [Line Items]
Electric operating revenues	445			381			1,316	1,342
Shared service and other revenues \| Corporate and Other \| Corporate, Non-Segment \| Pepco Holdings LLC
Segment Reporting Information [Line Items]
Electric operating revenues	$ 103			$ 94			$ 309	$ 298

Segment Information - Electric

Segment Information - Electric and Gas Revenue by Customer Class (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue, Major Customer [Line Items]
Total operating revenues	$ 5,980	$ 4,845	$ 16,360	$ 14,412
Operating Segment
Revenue, Major Customer [Line Items]
Total operating revenues	5,980	4,845	16,360	14,412
Operating Segment \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	0	0	0	6
Commonwealth Edison Co
Revenue, Major Customer [Line Items]
Total operating revenues	2,268	1,378	5,836	4,536
Commonwealth Edison Co \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	9	6	14	14
Commonwealth Edison Co \| Regulated Operation
Revenue, Major Customer [Line Items]
Total operating revenues	2,126	1,284	5,409	4,351
Commonwealth Edison Co \| Other Regulated Revenue
Revenue, Major Customer [Line Items]
Total operating revenues	142	94	427	185
PECO Energy Co
Revenue, Major Customer [Line Items]
Total operating revenues	1,037	1,014	2,977	2,877
PECO Energy Co \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	2	3	6	5
PECO Energy Co \| Regulated Operation
Revenue, Major Customer [Line Items]
Total operating revenues	1,023	1,014	2,961	2,864
PECO Energy Co \| Other Regulated Revenue
Revenue, Major Customer [Line Items]
Total operating revenues	14	0	16	13
Baltimore Gas and Electric Company
Revenue, Major Customer [Line Items]
Total operating revenues	932	870	2,986	2,810
Baltimore Gas and Electric Company \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	2	3	6	13
Baltimore Gas and Electric Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Total operating revenues	949	873	2,922	2,835
Baltimore Gas and Electric Company \| Other Regulated Revenue
Revenue, Major Customer [Line Items]
Total operating revenues	(17)	(3)	64	(25)
Pepco Holdings LLC
Revenue, Major Customer [Line Items]
Total operating revenues	1,773	1,598	4,615	4,223
Pepco Holdings LLC \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	2	3	7	9
Pepco Holdings LLC \| Regulated Operation
Revenue, Major Customer [Line Items]
Total operating revenues	1,785	1,608	4,545	4,252
Pepco Holdings LLC \| Other Regulated Revenue
Revenue, Major Customer [Line Items]
Total operating revenues	(12)	(10)	70	(29)
Potomac Electric Power Company
Revenue, Major Customer [Line Items]
Total operating revenues	822	724	2,174	1,919
Potomac Electric Power Company \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	1	2	5	4
Potomac Electric Power Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Total operating revenues	838	731	2,138	1,931
Potomac Electric Power Company \| Other Regulated Revenue
Revenue, Major Customer [Line Items]
Total operating revenues	(16)	(7)	36	(12)
Delmarva Power and Light Company
Revenue, Major Customer [Line Items]
Total operating revenues	450	412	1,273	1,176
Delmarva Power and Light Company \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	2	1	5	5
Delmarva Power and Light Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Total operating revenues	451	412	1,260	1,178
Delmarva Power and Light Company \| Other Regulated Revenue
Revenue, Major Customer [Line Items]
Total operating revenues	(1)	0	13	(2)
Atlantic City Electric Company
Revenue, Major Customer [Line Items]
Total operating revenues	502	462	1,172	1,120
Atlantic City Electric Company \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	0	0	1	2
Atlantic City Electric Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Total operating revenues	497	465	1,151	1,134
Atlantic City Electric Company \| Other Regulated Revenue
Revenue, Major Customer [Line Items]
Total operating revenues	5	(3)	21	(14)
Rate-regulated electric revenues
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	5,684	4,557	14,579	12,972
Rate-regulated electric revenues \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	5,793	4,621	15,056	13,082
Rate-regulated electric revenues \| Commonwealth Edison Co
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	2,124	1,284	5,417	4,359
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	2,126	1,284	5,409	4,351
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	9	6	14	14
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	7	6	22	22
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1,047	935	2,744	2,610
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	540	217	1,363	953
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	263	(117)	553	48
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation \| Public authorities & electric railroads
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	11	3	33	22
Rate-regulated electric revenues \| Commonwealth Edison Co \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	265	246	716	718
Rate-regulated electric revenues \| PECO Energy Co
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	957	943	2,478	2,384
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	956	941	2,470	2,378
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	2	3	5	5
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	3	5	13	11
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	654	620	1,617	1,538
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	148	149	415	386
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	67	93	196	229
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation \| Public authorities & electric railroads
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	7	8	23	23
Rate-regulated electric revenues \| PECO Energy Co \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	80	71	219	202
Rate-regulated electric revenues \| Baltimore Gas and Electric Company
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	856	761	2,306	2,138
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	853	760	2,298	2,132
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	1	2	4	5
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	4	4	12	11
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	512	406	1,308	1,158
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	86	88	253	239
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	144	158	412	418
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Public authorities & electric railroads
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	7	7	22	20
Rate-regulated electric revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	104	101	303	297
Rate-regulated electric revenues \| Pepco Holdings LLC
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1,762	1,568	4,399	4,090
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1,761	1,570	4,395	4,095
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	2	3	7	9
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	3	1	11	4
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	959	808	2,181	2,007
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	199	179	503	461
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	386	401	1,099	1,056
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation \| Public authorities & electric railroads
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	16	16	49	47
Rate-regulated electric revenues \| Pepco Holdings LLC \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	201	166	563	524
Rate-regulated electric revenues \| Potomac Electric Power Company
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	839	730	2,141	1,930
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	838	731	2,138	1,931
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	1	2	5	4
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	2	1	8	3
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	405	318	954	826
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	54	44	134	117
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	303	303	838	806
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation \| Public authorities & electric railroads
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	9	9	25	25
Rate-regulated electric revenues \| Potomac Electric Power Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	67	57	187	157
Rate-regulated electric revenues \| Delmarva Power and Light Company
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	426	373	1,108	1,017
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	427	374	1,110	1,021
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	2	1	5	5
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1	0	3	1
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	255	207	626	570
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	70	65	189	173
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	32	43	98	99
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation \| Public authorities & electric railroads
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	3	4	11	11
Rate-regulated electric revenues \| Delmarva Power and Light Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	67	55	186	168
Rate-regulated electric revenues \| Atlantic City Electric Company
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	497	465	1,150	1,132
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	497	465	1,151	1,134
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	0	0	1	2
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	299	283	601	611
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	75	70	180	171
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	51	55	163	151
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation \| Public authorities & electric railroads
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	4	3	13	11
Rate-regulated electric revenues \| Atlantic City Electric Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	68	54	194	190
Rate-regulated natural gas revenues
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	188	224	1,268	1,348
Rate-regulated natural gas revenues \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	187	224	1,304	1,330
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Regulated Operation \| Transportation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Commonwealth Edison Co \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| PECO Energy Co
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	67	73	492	487
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	67	73	491	486
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	0	0	1	1
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	2	1
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	43	46	335	335
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	16	20	123	125
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	1	0
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation \| Transportation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	7	5	20	19
Rate-regulated natural gas revenues \| PECO Energy Co \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1	2	12	7
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	96	114	627	699
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	96	113	624	703
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Related Party
Revenue, Major Customer [Line Items]
Operating revenues from affiliates	1	1	2	7
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1	1	5	4
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	57	70	406	448
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	10	13	66	77
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	25	28	124	128
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Transportation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Baltimore Gas and Electric Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	4	2	28	50
Rate-regulated natural gas revenues \| Pepco Holdings LLC
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	24	38	150	157
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	24	38	150	157
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	12	10	88	77
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	7	6	40	35
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1	3	3	9
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Regulated Operation \| Transportation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	3	3	11	11
Rate-regulated natural gas revenues \| Pepco Holdings LLC \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1	16	8	25
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Regulated Operation \| Transportation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Potomac Electric Power Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Delmarva Power and Light Company
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	24	38	150	157
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	24	38	150	157
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	12	10	88	77
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	7	6	40	35
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1	3	3	9
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Regulated Operation \| Transportation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	3	3	11	11
Rate-regulated natural gas revenues \| Delmarva Power and Light Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	1	16	8	25
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Regulated Operation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Regulated Operation \| Residential
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Regulated Operation \| Small commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Regulated Operation \| Large commercial & industrial
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Regulated Operation \| Transportation
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Rate-regulated natural gas revenues \| Atlantic City Electric Company \| Regulated Operation \| Other
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	0	0	0	0
Alternative revenue programs \| Commonwealth Edison Co \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	135	88	405	163
Alternative revenue programs \| PECO Energy Co \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	11	(5)	1	1
Alternative revenue programs \| Baltimore Gas and Electric Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	(22)	(8)	47	(40)
Alternative revenue programs \| Pepco Holdings LLC \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	(15)	(11)	59	(33)
Alternative revenue programs \| Potomac Electric Power Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	(18)	(8)	28	(15)
Alternative revenue programs \| Delmarva Power and Light Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	(2)	0	10	(3)
Alternative revenue programs \| Atlantic City Electric Company \| Regulated Operation \| Operating Segment
Revenue, Major Customer [Line Items]
Electric and natural gas operating revenues	$ 5	$ (3)	$ 21	$ (14)

Accounts Receivable - Allowance

Accounts Receivable - Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			$ (86)	$ (130)
Commonwealth Edison Co
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			(4)	(40)
PECO Energy Co
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			(31)	(32)
Baltimore Gas and Electric Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			(4)	(18)
Pepco Holdings LLC
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			(47)	(42)
Potomac Electric Power Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			(27)	(21)
Delmarva Power and Light Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			(9)	(9)
Atlantic City Electric Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Current period provision for expected credit losses			(11)	(12)
Customer accounts receivable
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 323	$ 354	327	320
Current period provision for expected credit losses	72	38	144	141
Writeoffs, net of recoveries	54	51	130	120
Ending balance	341	341	341	341
Customer accounts receivable \| Commonwealth Edison Co
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	67	81	59	73
Current period provision for expected credit losses	24	10	45	31
Writeoffs, net of recoveries	15	17	28	30
Ending balance	76	74	76	74
Customer accounts receivable \| PECO Energy Co
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	101	107	105	105
Current period provision for expected credit losses	13	12	32	33
Writeoffs, net of recoveries	19	16	42	35
Ending balance	95	103	95	103
Customer accounts receivable \| Baltimore Gas and Electric Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	50	57	54	38
Current period provision for expected credit losses	9	2	23	30
Writeoffs, net of recoveries	7	5	25	14
Ending balance	52	54	52	54
Customer accounts receivable \| Pepco Holdings LLC
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	105	109	109	104
Current period provision for expected credit losses	26	14	44	47
Writeoffs, net of recoveries	13	12	35	40
Ending balance	118	111	118	111
Customer accounts receivable \| Potomac Electric Power Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	50	42	47	37
Current period provision for expected credit losses	11	6	24	23
Writeoffs, net of recoveries	5	4	15	16
Ending balance	56	44	56	44
Customer accounts receivable \| Delmarva Power and Light Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	21	22	21	18
Current period provision for expected credit losses	6	1	10	8
Writeoffs, net of recoveries	4	3	8	6
Ending balance	23	20	23	20
Customer accounts receivable \| Atlantic City Electric Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	34	45	41	49
Current period provision for expected credit losses	9	7	10	16
Writeoffs, net of recoveries	4	5	12	18
Ending balance	39	47	39	47
Other receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	87	81	82	72
Current period provision for expected credit losses	6	8	21	24
Writeoffs, net of recoveries	5	5	15	12
Ending balance	88	84	88	84
Other receivables \| Commonwealth Edison Co
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	18	18	17	17
Current period provision for expected credit losses	3	2	6	5
Writeoffs, net of recoveries	1	2	3	4
Ending balance	20	18	20	18
Other receivables \| PECO Energy Co
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	8	10	9	7
Current period provision for expected credit losses	2	2	3	6
Writeoffs, net of recoveries	2	1	4	2
Ending balance	8	11	8	11
Other receivables \| Baltimore Gas and Electric Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	8	11	10	9
Current period provision for expected credit losses	3	2	5	6
Writeoffs, net of recoveries	2	1	6	3
Ending balance	9	12	9	12
Other receivables \| Pepco Holdings LLC
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	53	42	46	39
Current period provision for expected credit losses	(2)	2	7	7
Writeoffs, net of recoveries	0	1	2	3
Ending balance	51	43	51	43
Other receivables \| Potomac Electric Power Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	31	20	25	16
Current period provision for expected credit losses	(2)	2	4	6
Writeoffs, net of recoveries	0	0	0	0
Ending balance	29	22	29	22
Other receivables \| Delmarva Power and Light Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	9	8	7	8
Current period provision for expected credit losses	0	(1)	2	(1)
Writeoffs, net of recoveries	0	0	0	0
Ending balance	9	7	9	7
Other receivables \| Atlantic City Electric Company
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	13	14	14	15
Current period provision for expected credit losses	0	1	1	2
Writeoffs, net of recoveries	0	1	2	3
Ending balance	$ 13	$ 14	$ 13	$ 14

Accounts Receivable - Unbilled

Accounts Receivable - Unbilled Customer Revenue (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	$ 740	$ 912
Commonwealth Edison Co
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	279	223
PECO Energy Co
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	135	219
Baltimore Gas and Electric Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	118	247
Pepco Holdings LLC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	208	223
Potomac Electric Power Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	100	103
Delmarva Power and Light Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	44	74
Atlantic City Electric Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	$ 64	$ 46

Accounts Receivable - Purchases

Accounts Receivable - Purchases and Sales of Accounts Receivable (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	$ 3,124	$ 3,088
Commonwealth Edison Co
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	726	753
PECO Energy Co
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	843	832
Baltimore Gas and Electric Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	628	607
Pepco Holdings LLC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	927	896
Potomac Electric Power Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	600	559
Delmarva Power and Light Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	174	168
Atlantic City Electric Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	$ 153	169
Exelon Generation Co LLC Affiliate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Related Parties, Purchase		4
Exelon Generation Co LLC Affiliate [Member] \| Baltimore Gas and Electric Company
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Related Parties, Purchase		$ 4

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	Aug. 16, 2022	Sep. 30, 2023
Income Tax Additional Narrative Information [Line Items]
Income taxes receivable, current		$ 15
Notes payable, current		22
Notes payable, noncurrent		509
Tax credit carryforward, valuation allowance		0
US Treasury (UST) Interest Rate
Income Tax Additional Narrative Information [Line Items]
Effective income tax rate reconciliation, change in enacted tax rate, percent	15%
State and Local Jurisdiction \| Atlantic City Electric Company
Income Tax Additional Narrative Information [Line Items]
Unrecognized state tax benefits		$ 14

Income Taxes - Reconciliation t

Income Taxes - Reconciliation to Effective Tax Rate (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	(2.70%)	9%	2.80%	9.50%
Plant basis differences	(4.40%)	(5.30%)	(4.30%)	(4.20%)
Excess deferred tax amortization	(6.40%)	(11.60%)	(6.60%)	(11.30%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Tax credits	(0.50%)	(0.60%)	(0.50%)	0.30%
Other	1.80%	(0.40%)	1.50%	2.80%
Effective income tax rate	8.70%	12%	13.80%	18%
Current state and local tax expense (benefit)				$ 43
Effective income tax rate reconciliation, other adjustments, amount			$ 40
Income tax credits and adjustments				15
Total transaction costs relating to the Separation				19
Increase (decrease) in income taxes				38
Federal and State
Increase (decrease) due to:
Effective income tax rate reconciliation, state and local income taxes, amount	$ (54)		$ (54)	67
Valuation allowance, deferred tax asset, increase (decrease), amount				40
Indemnification Agreement
Increase (decrease) due to:
Effective income tax rate reconciliation, other adjustments, amount				$ 4
Commonwealth Edison Co
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	7.80%	8%	7.80%	7.90%
Plant basis differences	(0.40%)	(0.40%)	(0.40%)	(0.50%)
Excess deferred tax amortization	(5.30%)	(5.60%)	(5.50%)	(5.70%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Tax credits	(1.20%)	(0.40%)	(0.70%)	(0.30%)
Other	0.20%	(0.10%)	0.10%	0%
Effective income tax rate	22%	22.40%	22.20%	22.30%
PECO Energy Co
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	(1.20%)	20.70%	(1.30%)	6.60%
Plant basis differences	(15.60%)	(14.20%)	(15.50%)	(12.20%)
Excess deferred tax amortization	(2.40%)	(3.20%)	(2.40%)	(3.20%)
Amortization of investment tax credit, including deferred taxes on basis difference	0%	0%	0%	0%
Tax credits	0%	0%	0%	0%
Other	0.20%	0.30%	0.10%	0.20%
Effective income tax rate	2%	24.60%	1.90%	12.40%
Baltimore Gas and Electric Company
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	6.60%	6.80%	6.50%	2.80%
Plant basis differences	(0.20%)	(2.60%)	(0.50%)	(1.10%)
Excess deferred tax amortization	(5.40%)	(47.30%)	(5.40%)	(20.70%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.20%)	(0.10%)	(0.10%)
Tax credits	(2.00%)	(1.90%)	(0.70%)	(0.70%)
Other	(0.30%)	(2.70%)	0.20%	(0.10%)
Effective income tax rate	19.60%	(26.90%)	21%	1.10%
Pepco Holdings LLC
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	6.20%	1.40%	6.10%	2%
Plant basis differences	(1.50%)	(1.70%)	(1.60%)	(1.70%)
Excess deferred tax amortization	(8.00%)	(19.30%)	(7.70%)	(18.80%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Tax credits	(0.50%)	(0.90%)	(0.60%)	(0.70%)
Other	0.30%	0.30%	0.30%	0.20%
Effective income tax rate	17.40%	0.70%	17.40%	1.90%
Potomac Electric Power Company
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	5.50%	(2.70%)	5.50%	(3.20%)
Plant basis differences	(2.40%)	(2.30%)	(2.50%)	(2.40%)
Excess deferred tax amortization	(9.20%)	(14.60%)	(9.20%)	(15.40%)
Amortization of investment tax credit, including deferred taxes on basis difference	0%	0%	0%	0%
Tax credits	(0.60%)	(0.80%)	(0.70%)	(0.60%)
Other	0.60%	0.10%	0.60%	(0.20%)
Effective income tax rate	14.90%	0.70%	14.70%	(0.80%)
Delmarva Power and Light Company
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	6.10%	6.50%	6.20%	6.50%
Plant basis differences	(0.90%)	(0.80%)	(1.00%)	(0.70%)
Excess deferred tax amortization	(10.00%)	(21.70%)	(9.40%)	(20.40%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.20%)	(0.10%)	(0.20%)
Tax credits	(0.40%)	(1.30%)	(0.40%)	(0.70%)
Other	0%	0.20%	0%	0.30%
Effective income tax rate	15.70%	3.70%	16.30%	5.80%
Atlantic City Electric Company
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal statutory rate	21%	21%	21%	21%
Increase (decrease) due to:
State income taxes, net of Federal income tax benefit	7%	7%	6.90%	6.90%
Plant basis differences	(0.50%)	(1.00%)	(0.50%)	(1.10%)
Excess deferred tax amortization	(3.10%)	(25.50%)	(2.60%)	(24.70%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.20%)	(0.10%)	(0.20%)
Tax credits	(0.30%)	(0.70%)	(0.30%)	(0.60%)
Other	0.50%	0.50%	0.30%	0.20%
Effective income tax rate	24.50%	1.10%	24.70%	1.50%

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 138	$ 148
Income taxes receivable, noncurrent	50	50
Pepco Holdings LLC
Income Tax Contingency [Line Items]
Unrecognized tax benefits	56	59
Atlantic City Electric Company
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 16	$ 17

Income Taxes - Allocation of Ta

Income Taxes - Allocation of Tax Benefits (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Commonwealth Edison Co
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	$ 13	$ 1
PECO Energy Co
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	19	47
Baltimore Gas and Electric Company
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	0	0
Pepco Holdings LLC
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	10	28
Potomac Electric Power Company
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	4	23
Delmarva Power and Light Company
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	0	3
Atlantic City Electric Company
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	$ 2	$ 2

Retirement Benefits - Narrative

Retirement Benefits - Narrative (Details) $ in Millions	9 Months Ended
Retirement Benefits - Narrative (Details) $ in Millions	Sep. 30, 2023 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Increase (Decrease) in Obligation, Pension Benefits	$ (27)
Increase (Decrease) in Obligation, Other Postretirement Benefits	2
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax	10
Defined Benefit Plan Amounts Recognized In Regulatory Assets Before Tax	18
Defined Benefit Plan Amounts Recognized In Regulatory Liabilities Before Tax	$ 1
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on assets	7%
Discount rate	5.53%
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on assets	6.50%
Discount rate	5.51%

Retirement Benefits - Calculati

Retirement Benefits - Calculation of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Amortization of:
Non-service net periodic benefit cost	$ (18)	$ 16	$ (18)	$ 48
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	39	58	116	177
Interest cost	145	110	434	330
Expected return on assets	(189)	(205)	(566)	(619)
Amortization of:
Prior service cost (credit)	1	1	2	3
Actuarial loss	41	73	125	222
Settlement charges	18	0	18	0
Non-service net periodic benefit cost	55	37	129	113
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	10	18	30
Interest cost	25	19	76	57
Expected return on assets	(21)	(25)	(63)	(75)
Amortization of:
Prior service cost (credit)	(2)	(5)	(7)	(15)
Actuarial loss	0	4	(1)	12
Settlement charges	0	0	0	0
Non-service net periodic benefit cost	$ 8	$ 3	$ 23	$ 9

Retirement Benefits - Allocated

Retirement Benefits - Allocated Portion of Pension and Postretirement Benefit Plan Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			$ 152	$ 124
Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	$ 63	$ 40	152	122
Commonwealth Edison Co
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			19	45
Commonwealth Edison Co \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	6	15	19	45
PECO Energy Co
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			(10)	(6)
PECO Energy Co \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	(3)	(2)	(10)	(6)
Baltimore Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			41	34
Baltimore Gas and Electric Company \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	14	11	42	33
Pepco Holdings LLC
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			74	39
Pepco Holdings LLC \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	25	13	74	39
Potomac Electric Power Company
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			26	6
Potomac Electric Power Company \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	9	2	26	6
Delmarva Power and Light Company
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			13	3
Delmarva Power and Light Company \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	4	1	13	3
Atlantic City Electric Company
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			10	9
Atlantic City Electric Company \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	$ 3	$ 3	$ 10	$ 9

Retirement Benefits - Defined C

Retirement Benefits - Defined Contribution Savings Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 27	$ 23	$ 74	$ 66
Commonwealth Edison Co
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	12	11	31	29
PECO Energy Co
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	3	3	10	9
Baltimore Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	3	2	8	7
Pepco Holdings LLC
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	5	4	13	11
Potomac Electric Power Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	3	3
Delmarva Power and Light Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	3	3
Atlantic City Electric Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 1	$ 1	$ 2	$ 2

Derivative Financial Instrume_2

Derivative Financial Instruments - Narrative (Details) MWh in Millions, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Jun. 30, 2012 MWh	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jan. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (596)	$ (596)		$ (638)
Corporate, Non-Segment \| Notes Payable to Banks
Derivative [Line Items]
Debt instrument, face amount		$ 2,500	2,500
Commonwealth Edison Co
Derivative [Line Items]
Long-term Purchase Commitment, Minimum Energy Volume Required \| MWh	1.3
PECO Energy Co
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		10%
Incremental Collateral For Loss Of Investment Grade Credit Rating		$ 20	20
Baltimore Gas and Electric Company
Derivative [Line Items]
Incremental Collateral For Loss Of Investment Grade Credit Rating		$ 30	30
Baltimore Gas and Electric Company \| Maximum [Member]
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		20%
Baltimore Gas and Electric Company \| Minimum [Member]
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		10%
Delmarva Power and Light Company
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		50%
Incremental Collateral For Loss Of Investment Grade Credit Rating		$ 9	9
InterestRateSwapNotional5YR \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		390	390	$ 115	635
InterestRateSwapNotional10YR \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		390	390	115	635
Interest Rate Swap [Member] \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		780	780	230	1,270
Derivative, Cash Received on Hedge		10
Derivative, Gain (Loss) on Derivative, Net		22	31
InterestRateSwapNotionalTerminated \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount				1,500
Accumulated Other Comprehensive Income (Loss), Net of Tax				$ 7
Interest Rate Cap \| Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 1,000	$ 1,000		1,850
InterestRateCap18month \| Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Derivative, Notional Amount					1,000
InterestRateCapNotional6month \| Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative [Line Items]
Derivative, Notional Amount					$ 850

Derivative Financial Instrume_3

Derivative Financial Instruments - Summary of Interest Rate Hedge Balances (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mark-to-market derivative liabilities (current liabilities)	$ 44	$ 8
Derivative Liability, Noncurrent	113	83
Interest Rate Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Noncurrent	41	11
Derivative Asset	44	11
Mark-to-market derivative liabilities (current liabilities)	(23)	(3)
Derivative Liability, Noncurrent		(4)
Derivative Liability	(23)	(7)
Derivative, Fair Value, Net	21	4
Mark-to-market derivative assets, current	3
Interest Rate Contract \| Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Noncurrent	41	6
Derivative Asset	41	6
Mark-to-market derivative liabilities (current liabilities)	0	0
Derivative Liability, Noncurrent		(4)
Derivative Liability	0	(4)
Derivative, Fair Value, Net	41	2
Mark-to-market derivative assets, current	0
Interest Rate Contract \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Noncurrent	0	5
Derivative Asset	3	5
Mark-to-market derivative liabilities (current liabilities)	(23)	(3)
Derivative Liability, Noncurrent		0
Derivative Liability	(23)	(3)
Derivative, Fair Value, Net	(20)	$ 2
Mark-to-market derivative assets, current	$ 3

Derivative Financial Instrume_4

Derivative Financial Instruments - Summary of Notional Amounts of Outstanding Derivative Positions (Details) - Cash Flow Hedging - USD ($) $ in Millions	Sep. 30, 2023	Jan. 31, 2023	Dec. 31, 2022
InterestRateSwapNotional5YR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 390	$ 115	$ 635
InterestRateSwapNotional10YR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	390	115	635
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 780	$ 230	$ 1,270

Derivative Financial Instrume_5

Derivative Financial Instruments - Summary of Derivatives Not Designated as Hedging Instruments (Details) - Not Designated as Hedging Instrument, Economic Hedge [Member] - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Interest Rate Cap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 1,000	$ 1,850
Constant Maturity Treasury Interest Rate Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	4,875	500
Economic Hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 5,875	$ 2,350

Derivative Financial Instrume_6

Derivative Financial Instruments - Summary of Economic Hedges (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Derivatives		$ (21)	$ 59
Interest Rate Cap \| Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Derivatives	$ (16)	(20)
Interest Rate Cap \| Not Designated as Hedging Instrument, Economic Hedge [Member] \| Electric Operating Revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Derivatives	(16)	(21)
Interest Rate Cap \| Not Designated as Hedging Instrument, Economic Hedge [Member] \| Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Derivatives	$ 0	$ 1

Derivative Financial Instrume_7

Derivative Financial Instruments - Summary of Counterparty Collateral (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	$ 933	$ 1,155
External Counterparties \| Commodity Contract [Member] \| Collateral [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	112	297
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Commonwealth Edison Co
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	105	77
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| PECO Energy Co
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	0	0
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Baltimore Gas and Electric Company
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	1	23
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Pepco Holdings LLC
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	6	197
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Potomac Electric Power Company
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	0	26
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Delmarva Power and Light Company
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	1	121
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Atlantic City Electric Company
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	$ 5	$ 50

Debt and Credit Agreements (A_3

Debt and Credit Agreements (All Registrants) - Narrative (Details) - USD ($)			9 Months Ended
	May 09, 2023	Oct. 04, 2022	Sep. 30, 2023	Mar. 24, 2023	Mar. 14, 2023	Jan. 13, 2023	Oct. 07, 2022	Mar. 23, 2017
Corporate, Non-Segment \| ShortTermDebt03232017
Short-term Debt [Line Items]
Short-term bank loans and notes payable								$ 500,000,000
Corporate, Non-Segment \| ShortTermDebt03232017 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt instrument, interest rate terms			0.90%
Corporate, Non-Segment \| ShortTermDebt03142023
Short-term Debt [Line Items]
Short-term bank loans and notes payable					$ 300,000,000
Corporate, Non-Segment \| ShortTermDebt03242023
Short-term Debt [Line Items]
Short-term bank loans and notes payable				$ 200,000,000
Commonwealth Edison Co \| ShortTermDebtSOFRplus075Oct2023
Short-term Debt [Line Items]
Short-term bank loans and notes payable		$ 150,000,000
Commonwealth Edison Co \| ShortTermDebtSOFRplus075Oct2023 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt instrument, interest rate terms		0.75%
Commonwealth Edison Co \| FMB490Feb2033 \| First Mortgage
Short-term Debt [Line Items]
Debt instrument, face amount						$ 400,000,000
Commonwealth Edison Co \| FMB530Feb2053 \| First Mortgage
Short-term Debt [Line Items]
Debt instrument, face amount						$ 575,000,000
Commonwealth Edison Co \| ShortTermDebtSOFRplus100May72024
Short-term Debt [Line Items]
Short-term bank loans and notes payable	$ 400,000,000
Commonwealth Edison Co \| ShortTermDebtSOFRplus100May72024 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt instrument, interest rate terms	1%
Revolving Credit Facility \| Corporate, Non-Segment
Short-term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period			$ 0
Line of credit facility, maximum borrowing capacity			900,000,000
Revolving Credit Facility \| Commonwealth Edison Co
Short-term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period			0
Line of credit facility, maximum borrowing capacity			1,000,000,000
Revolving Credit Facility \| PECO Energy Co
Short-term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period			0
Line of credit facility, maximum borrowing capacity			600,000,000
Revolving Credit Facility \| Baltimore Gas and Electric Company
Short-term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period			0
Line of credit facility, maximum borrowing capacity			600,000,000
Revolving Credit Facility \| Potomac Electric Power Company
Short-term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period			0
Line of credit facility, maximum borrowing capacity			300,000,000
Revolving Credit Facility \| Delmarva Power and Light Company
Short-term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period			0
Line of credit facility, maximum borrowing capacity			300,000,000
Revolving Credit Facility \| Atlantic City Electric Company
Short-term Debt [Line Items]
Line of credit facility, maximum amount outstanding during period			0
Line of credit facility, maximum borrowing capacity			$ 300,000,000
Letter of Credit \| Commonwealth Edison Co
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity							$ 40,000,000
Letter of Credit \| PECO Energy Co
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity							40,000,000
Letter of Credit \| Baltimore Gas and Electric Company
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity							15,000,000
Letter of Credit \| Potomac Electric Power Company
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity							15,000,000
Letter of Credit \| Delmarva Power and Light Company
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity							15,000,000
Letter of Credit \| Atlantic City Electric Company
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity							$ 15,000,000

Debt and Credit Agreements (A_4

Debt and Credit Agreements (All Registrants) - Commercial Paper Borrowings (Details) - Commercial Paper - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Short-term Debt [Line Items]
Commercial paper	$ 820	$ 1,938
Short-term debt, weighted average interest rate, at point in time	5.44%	4.77%
Corporate
Short-term Debt [Line Items]
Commercial paper	$ 311	$ 449
Commonwealth Edison Co
Short-term Debt [Line Items]
Commercial paper	$ 277	$ 427
Short-term debt, weighted average interest rate, at point in time	5.42%	4.71%
PECO Energy Co
Short-term Debt [Line Items]
Commercial paper	$ 0	$ 239
Short-term debt, weighted average interest rate, at point in time	0%	4.71%
Baltimore Gas and Electric Company
Short-term Debt [Line Items]
Commercial paper	$ 59	$ 409
Short-term debt, weighted average interest rate, at point in time	5.43%	4.81%
Pepco Holdings LLC
Short-term Debt [Line Items]
Commercial paper	$ 173	$ 414
Short-term debt, weighted average interest rate, at point in time	5.47%	4.78%
Potomac Electric Power Company
Short-term Debt [Line Items]
Commercial paper	$ 0	$ 299
Short-term debt, weighted average interest rate, at point in time	0%	4.79%
Delmarva Power and Light Company
Short-term Debt [Line Items]
Commercial paper	$ 0	$ 115
Short-term debt, weighted average interest rate, at point in time	0%	4.76%
Atlantic City Electric Company
Short-term Debt [Line Items]
Commercial paper	$ 173	$ 0
Short-term debt, weighted average interest rate, at point in time	5.47%	0%

Debt and Credit Agreements (A_5

Debt and Credit Agreements (All Registrants) - Summary of Revolving Credit Agreements (Details) - Revolving Credit Facility $ in Millions	Sep. 30, 2023 USD ($)
Commonwealth Edison Co
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,000
Commonwealth Edison Co \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	1%
PECO Energy Co
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600
PECO Energy Co \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	0.90%
Baltimore Gas and Electric Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600
Baltimore Gas and Electric Company \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	0.90%
Potomac Electric Power Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Potomac Electric Power Company \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	1.075%
Delmarva Power and Light Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Delmarva Power and Light Company \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	1%
Atlantic City Electric Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Atlantic City Electric Company \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	1.075%
Corporate, Non-Segment
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 900
Corporate, Non-Segment \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Line of credit facility, interest rate at period end	1.275%

Debt and Credit Agreements (A_6

Debt and Credit Agreements (All Registrants) - Issuance of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2023	Mar. 15, 2023
Corporate \| Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, face amount	$ 2,500
Corporate \| Notes515Mar2028 \| Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	5.15%
Debt instrument, face amount	$ 1,000
Corporate \| Notes530Mar2033 \| Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt instrument, face amount	$ 850
Corporate \| Note560Mar2053 \| Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	5.60%
Debt instrument, face amount	$ 650
Commonwealth Edison Co \| ComEdFMB490Feb2033 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	4.90%
Debt instrument, face amount	$ 400
Commonwealth Edison Co \| FMB530Feb2053 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt instrument, face amount	$ 575
PECO Energy Co \| PECOFMB575M \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	4.90%
Debt instrument, face amount	$ 575
Baltimore Gas and Electric Company \| SeniorNotes540June2053 \| Senior Notes
Debt Instrument [Line Items]
Interest Rate	5.40%
Debt instrument, face amount	$ 700
Potomac Electric Power Company \| PepcoFMB5.30Mar2033 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt instrument, face amount	$ 85
Potomac Electric Power Company \| FMB540Feb2038 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.40%
Debt instrument, face amount	$ 40
Potomac Electric Power Company \| PepcoFMB557Mar2053 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.57%
Debt instrument, face amount	$ 125
Potomac Electric Power Company \| PepcoFMB535Sept2033 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.35%
Debt instrument, face amount	$ 100
Delmarva Power and Light Company \| DPLFMB530Mar2033 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt instrument, face amount	$ 60
Delmarva Power and Light Company \| DPLFMB557Mar2053 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.57%
Debt instrument, face amount	$ 65
Delmarva Power and Light Company \| DPLFMB545Nov2033 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		5.45%
Debt instrument, face amount		$ 340
Delmarva Power and Light Company \| DPLFMB555Nov2038 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		5.55%
Debt instrument, face amount		$ 75
Delmarva Power and Light Company \| DPLFMB572Nov2053 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		5.72%
Debt instrument, face amount		$ 110
Atlantic City Electric Company \| ACEFMB557Mar2053 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.57%
Debt instrument, face amount	$ 75

Fair Value of Financial Asset_3

Fair Value of Financial Assets and Liabilities - Fair Value of Financial Liabilities Recorded at Amortized Cost (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	$ 41,085	$ 37,074
Reported Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	390	390
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	34,259	32,229
Estimate of Fair Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	384	384
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	31,584	29,902
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	2,675	2,327
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	384	384
Long-term debt to financing trusts	390	390
Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	390	390
Commonwealth Edison Co \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	11,484	10,518
Commonwealth Edison Co \| Reported Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	205	205
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	9,343	9,006
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	206	204
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	0	0
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	9,343	9,006
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	0	0
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Commonwealth Edison Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	206	204
Commonwealth Edison Co \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	205	205
PECO Energy Co \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	5,133	4,612
PECO Energy Co \| Reported Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	184	184
PECO Energy Co \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	4,110	3,914
PECO Energy Co \| Estimate of Fair Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	179	180
PECO Energy Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
PECO Energy Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	0	0
PECO Energy Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	4,110	3,864
PECO Energy Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	0	0
PECO Energy Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	50
PECO Energy Co \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	179	180
PECO Energy Co \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to financing trusts	184	184
Baltimore Gas and Electric Company \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	4,601	4,207
Baltimore Gas and Electric Company \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	3,735	3,613
Baltimore Gas and Electric Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Baltimore Gas and Electric Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	3,735	3,613
Baltimore Gas and Electric Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Pepco Holdings LLC \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	8,637	8,120
Pepco Holdings LLC \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	7,027	6,784
Pepco Holdings LLC \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Pepco Holdings LLC \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	4,352	4,507
Pepco Holdings LLC \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	2,675	2,277
Potomac Electric Power Company \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	4,095	3,751
Potomac Electric Power Company \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	3,602	3,434
Potomac Electric Power Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Potomac Electric Power Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	2,129	2,229
Potomac Electric Power Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	1,473	1,205
Delmarva Power and Light Company \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	2,060	1,938
Delmarva Power and Light Company \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	1,669	1,622
Delmarva Power and Light Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Delmarva Power and Light Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	1,126	1,164
Delmarva Power and Light Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	543	458
Atlantic City Electric Company \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	1,833	1,757
Atlantic City Electric Company \| Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	1,552	1,523
Atlantic City Electric Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	0	0
Atlantic City Electric Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	893	909
Atlantic City Electric Company \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	$ 659	$ 614

Fair Value of Financial Asset_4

Fair Value of Financial Assets and Liabilities - Fair Value Measurements of Assets and Liabilities, Recurring and Nonrecurring (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities (current liabilities)	$ 44	$ 8
Derivative Liability, Noncurrent	113	83
Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	649	664
Assets, Fair Value Disclosure	921	891
Deferred Compensation Liability, Current and Noncurrent	(69)	(75)
Total liabilities	226	166
Fair Value, Net Asset (Liability)	695	725
Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(134)	(84)
Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	(4)
Fair Value, Recurring [Member] \| Economic Hedging Instrument Liabilites [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(23)	(3)
Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(23)	(7)
Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	188	345
Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	110	81
Fair Value, Recurring [Member] \| Other Assets [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	212	117
Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	228	216
Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	66	62
Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	53	49
Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	7	7
Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	102	98
Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	41	6
Fair Value, Recurring [Member] \| Economic Hedges
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	3	5
Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	44	11
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	649	664
Assets, Fair Value Disclosure	768	775
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	768	775
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Economic Hedging Instrument Liabilites [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	119	111
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	66	62
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	53	49
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Economic Hedges
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	111	76
Deferred Compensation Liability, Current and Noncurrent	(69)	(75)
Total liabilities	92	82
Fair Value, Net Asset (Liability)	19	(6)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	(4)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Economic Hedging Instrument Liabilites [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(23)	(3)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(23)	(7)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	67	65
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	7	7
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	60	58
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	41	6
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Economic Hedges
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	3	5
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	44	11
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	42	40
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	134	84
Fair Value, Net Asset (Liability)	(92)	(44)
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(134)	(84)
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Economic Hedging Instrument Liabilites [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	42	40
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	42	40
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Economic Hedges
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	0	0
Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Commonwealth Edison Co
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities (current liabilities)	21	5
Derivative Liability, Noncurrent	113	79
Commonwealth Edison Co \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	491	392
Assets, Fair Value Disclosure	491	392
Total mark-to-market derivative liabilities	(134)	(84)
Deferred Compensation Liability, Current and Noncurrent	(7)	(8)
Total liabilities	141	92
Fair Value, Net Asset (Liability)	350	300
Mark-to-market derivative liabilities (current liabilities)	(21)	5	$ 0
Derivative Liability, Noncurrent	(113)	79	$ (67)
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	55	42
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	105	77
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Other Assets [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	212	117
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	491	392
Assets, Fair Value Disclosure	491	392
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	491	392
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(7)	(8)
Total liabilities	7	8
Fair Value, Net Asset (Liability)	(7)	(8)
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	(134)	(84)
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	134	84
Fair Value, Net Asset (Liability)	(134)	(84)
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
PECO Energy Co \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	29	10
Assets, Fair Value Disclosure	55	32
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(8)	(7)
Total liabilities	8	7
Fair Value, Net Asset (Liability)	47	25
PECO Energy Co \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	23	58
PECO Energy Co \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	26	22
PECO Energy Co \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	9	7
PECO Energy Co \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	17	15
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	29	10
Assets, Fair Value Disclosure	38	17
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	38	17
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	9	7
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	9	7
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	17	15
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(8)	(7)
Total liabilities	8	7
Fair Value, Net Asset (Liability)	9	8
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	17	15
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	17	15
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	2	23
Assets, Fair Value Disclosure	11	30
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(4)	(4)
Total liabilities	4	4
Fair Value, Net Asset (Liability)	7	26
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	13	43
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1	1
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	9	7
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	9	7
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	2	23
Assets, Fair Value Disclosure	11	30
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	11	30
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	9	7
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	9	7
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(4)	(4)
Total liabilities	4	4
Fair Value, Net Asset (Liability)	(4)	(4)
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Pepco Holdings LLC \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	83	205
Assets, Fair Value Disclosure	224	343
Deferred Compensation Liability, Current and Noncurrent	(13)	(14)
Total liabilities	13	14
Fair Value, Net Asset (Liability)	211	329
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	60	165
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	3	3
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	141	138
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	63	59
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	10	11
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	7	7
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	61	61
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	83	205
Assets, Fair Value Disclosure	156	275
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	156	275
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	73	70
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	63	59
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	10	11
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	28	29
Deferred Compensation Liability, Current and Noncurrent	(13)	(14)
Total liabilities	13	14
Fair Value, Net Asset (Liability)	15	15
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	28	29
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	7	7
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	21	22
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	40	39
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	40	39
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	40	39
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	40	39
Pepco Holdings LLC \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Potomac Electric Power Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	22	51
Assets, Fair Value Disclosure	145	170
Deferred Compensation Liability, Current and Noncurrent	(1)	(1)
Total liabilities	1	1
Fair Value, Net Asset (Liability)	144	169
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	31	45
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	3	3
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	123	119
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	62	59
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	61	60
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	22	51
Assets, Fair Value Disclosure	84	110
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	84	110
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	62	59
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	62	59
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	21	22
Deferred Compensation Liability, Current and Noncurrent	(1)	(1)
Total liabilities	1	1
Fair Value, Net Asset (Liability)	20	21
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	21	22
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	21	22
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	40	38
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	40	38
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	40	38
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	40	38
Potomac Electric Power Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Delmarva Power and Light Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1	121
Assets, Fair Value Disclosure	1	121
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	1	121
Delmarva Power and Light Company \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	5	31
Delmarva Power and Light Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1	121
Assets, Fair Value Disclosure	1	121
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	1	121
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Atlantic City Electric Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1	1
Assets, Fair Value Disclosure	1	1
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	1	1
Atlantic City Electric Company \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	13	71
Atlantic City Electric Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1	1
Assets, Fair Value Disclosure	1	1
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	1	1
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	$ 0	$ 0

Fair Value of Financial Asset_5

Fair Value of Financial Assets and Liabilities - Fair Value Assets Liabilities Measured On Recurring Basis Unobservable Input Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Mark-to-market derivative liabilities (current liabilities)	$ 44		$ 44		$ 8
Derivative Liability, Noncurrent	113		113		83
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	(91)	$ (50)	(44)	$ (182)
Total realized / unrealized gains (losses)
Included in net income	0	1	2	3
Included in regulatory assets/liabilities	(1)	45	(50)	176
Purchases, sales, issuances and settlements
Transfers out of Level 3				(1)
Ending Balance	(92)	(4)	(92)	(4)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0	1	2	3
Commonwealth Edison Co
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Mark-to-market derivative liabilities (current liabilities)	21		21		5
Derivative Liability, Noncurrent	113		113		79
Commonwealth Edison Co \| Fair Value, Recurring [Member]
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Mark-to-market derivative liabilities (current liabilities)	(21)	0	(21)	0	5
Derivative Liability, Noncurrent	(113)	(67)	(113)	(67)	$ 79
Mark-to-market derivative assets, current		24		24
Commonwealth Edison Co \| Derivative [Member] \| Interest Rate Swap [Member]
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Realized Investment Gains (Losses)	4	6	23	3
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Derivative [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	(133)	(88)	(84)	(219)
Total realized / unrealized gains (losses)
Included in net income	0	0	0	0
Included in regulatory assets/liabilities	(1)	45	(50)	176
Purchases, sales, issuances and settlements
Transfers out of Level 3				0
Ending Balance	(134)	(43)	(134)	(43)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0	0	0	0
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	(5)	51	(73)	179
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| 6311 Life Insurance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	42	37	40	35
Total realized / unrealized gains (losses)
Included in net income	(2)	1	0	3
Included in regulatory assets/liabilities	0	0	0	0
Purchases, sales, issuances and settlements
Transfers out of Level 3				0
Ending Balance	40	38	40	38
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	(2)	1	0	3
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| 6311 Life Insurance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	42	37	40	35
Total realized / unrealized gains (losses)
Included in net income	(2)	1	0	3
Included in regulatory assets/liabilities	0	0	0	0
Purchases, sales, issuances and settlements
Transfers out of Level 3				0
Ending Balance	40	38	40	38
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	$ (2)	$ 1	$ 0	$ 3

Fair Value of Financial Asset_6

Fair Value of Financial Assets and Liabilities - Fair Value Inputs Assets Quantitative Information (Details) - Fair Value, Inputs, Level 3 [Member] - Derivative [Member] - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ (134,000,000)	$ (84,000,000)
Discounted Cash Flow [Member] \| Minimum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	30.13	34.78
Discounted Cash Flow [Member] \| Maximum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	72.72	75.71
Discounted Cash Flow [Member] \| Arithmetic Average [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	42.77	48.44
Commonwealth Edison Co
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ (134,000,000)	$ (84,000,000)
Commonwealth Edison Co \| Discounted Cash Flow [Member] \| Minimum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	30.13	34.78
Commonwealth Edison Co \| Discounted Cash Flow [Member] \| Maximum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	72.72	75.71
Commonwealth Edison Co \| Discounted Cash Flow [Member] \| Arithmetic Average [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	42.77	48.44

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) $ in Millions	1 Months Ended	9 Months Ended
	Nov. 30, 2020 USD ($)	Sep. 30, 2023 USD ($) mGPSite	Dec. 31, 2022 USD ($)
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		$ 434	$ 409
Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		$ 345	355
Commonwealth Edison Co
Commitments And Contingencies Additional Narrative Information [Line Items]
Mgp Site Contingency Monitoring Count \| mGPSite		19
Deferred Prosecution Agreement Payments	$ 200
Loss Contingency Accrual		$ 46.2
Customer Refund Liability, Current		38
Accrual for Environmental Loss Contingencies, Gross		312	325
Commonwealth Edison Co \| Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)		25
Accrual for Environmental Loss Contingencies, Gross		311	324
Commonwealth Edison Co \| Illinois Chamber of Commerce
Commitments And Contingencies Additional Narrative Information [Line Items]
Customer Refund Liability, Current		$ 31
PECO Energy Co
Commitments And Contingencies Additional Narrative Information [Line Items]
Mgp Site Contingency Monitoring Count \| mGPSite		6
Accrual for Environmental Loss Contingencies, Gross		$ 28	25
PECO Energy Co \| Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		$ 26	23
Baltimore Gas and Electric Company
Commitments And Contingencies Additional Narrative Information [Line Items]
Mgp Site Contingency Monitoring Count \| mGPSite		4
Accrual for Environmental Loss Contingencies, Gross		$ 9	9
Baltimore Gas and Electric Company \| Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		8	8
Pepco Holdings LLC
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		82	46
Pepco Holdings LLC \| Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		0	0
Potomac Electric Power Company
Commitments And Contingencies Additional Narrative Information [Line Items]
Environmental Liability - Anacostia		47
Environmental Liability - Buzzard Point		10
Accrual for Environmental Loss Contingencies, Gross		80	44
Potomac Electric Power Company \| Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		$ 0	0
Delmarva Power and Light Company
Commitments And Contingencies Additional Narrative Information [Line Items]
Mgp Site Contingency Monitoring Count \| mGPSite		1
Accrual for Environmental Loss Contingencies, Gross		$ 1	1
Delmarva Power and Light Company \| Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross		0	$ 0
Exelon Business Services Co Affiliate
Commitments And Contingencies Additional Narrative Information [Line Items]
Deferred Prosecution Agreement Liability, Current		173
Insurers' Settlement Payment		40
Settling Shareholders' Attorney Fees		$ 10

Commitments and Contingencies_3

Commitments and Contingencies - Merger Commitment (Details) $ in Millions	Sep. 30, 2023 USD ($)
Other Commitments [Line Items]
Other Commitment	$ 634
Pepco Holdings LLC
Other Commitments [Line Items]
Other Commitment	126
Potomac Electric Power Company
Other Commitments [Line Items]
Other Commitment	95
Delmarva Power and Light Company
Other Commitments [Line Items]
Other Commitment	19
Atlantic City Electric Company
Other Commitments [Line Items]
Other Commitment	12
Pepco Holdings Inc [Member]
Other Commitments [Line Items]
Other Commitment	513
Pepco Holdings Inc [Member] \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	42
Pepco Holdings Inc [Member] \| Pepco Holdings LLC
Other Commitments [Line Items]
Other Commitment	320
Pepco Holdings Inc [Member] \| Pepco Holdings LLC \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	39
Pepco Holdings Inc [Member] \| Potomac Electric Power Company
Other Commitments [Line Items]
Other Commitment	120
Pepco Holdings Inc [Member] \| Potomac Electric Power Company \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	34
Pepco Holdings Inc [Member] \| Delmarva Power and Light Company
Other Commitments [Line Items]
Other Commitment	89
Pepco Holdings Inc [Member] \| Delmarva Power and Light Company \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	3
Pepco Holdings Inc [Member] \| Atlantic City Electric Company
Other Commitments [Line Items]
Other Commitment	111
Pepco Holdings Inc [Member] \| Atlantic City Electric Company \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	$ 2

Commitments and Contingencies_4

Commitments and Contingencies - Schedule of Commercial Commitments (Details) $ in Millions	Sep. 30, 2023 USD ($)
Other Commitments [Line Items]
Other Commitment	$ 634
Other Commitment, to be Paid, Remainder of Fiscal Year	94
Other Commitment, to be Paid, Year One	137
Other Commitment, to be Paid, Year Two	6
Other Commitment, to be Paid, Year Three	5
Other Commitment, to be Paid, Year Four	4
Other Commitment, to be Paid, Year Five and Beyond	388
Guarantor Obligations, Maximum Exposure, Undiscounted	66
Letters of Credit
Other Commitments [Line Items]
Other Commitment	20
Other Commitment, to be Paid, Remainder of Fiscal Year	9
Other Commitment, to be Paid, Year One	11
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Surety Bonds
Other Commitments [Line Items]
Other Commitment	207
Other Commitment, to be Paid, Remainder of Fiscal Year	85
Other Commitment, to be Paid, Year One	122
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Financing trust guarantees
Other Commitments [Line Items]
Other Commitment	378
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	0
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	378
Guaranteed lease residual values
Other Commitments [Line Items]
Other Commitment	29
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	4
Other Commitment, to be Paid, Year Two	6
Other Commitment, to be Paid, Year Three	5
Other Commitment, to be Paid, Year Four	4
Other Commitment, to be Paid, Year Five and Beyond	10
Commonwealth Edison Co
Other Commitments [Line Items]
Other Commitment	258
Other Commitment, to be Paid, Remainder of Fiscal Year	11
Other Commitment, to be Paid, Year One	47
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	200
Commonwealth Edison Co \| Letters of Credit
Other Commitments [Line Items]
Other Commitment	12
Other Commitment, to be Paid, Remainder of Fiscal Year	6
Other Commitment, to be Paid, Year One	6
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Commonwealth Edison Co \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	46
Other Commitment, to be Paid, Remainder of Fiscal Year	5
Other Commitment, to be Paid, Year One	41
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Commonwealth Edison Co \| Financing trust guarantees
Other Commitments [Line Items]
Other Commitment	200
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	0
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	200
PECO Energy Co
Other Commitments [Line Items]
Other Commitment	181
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	3
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	178
PECO Energy Co \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	2
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	2
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
PECO Energy Co \| Financing trust guarantees
Other Commitments [Line Items]
Other Commitment	178
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	0
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	178
PECO Energy Co \| Standby Letters of Credit
Other Commitments [Line Items]
Other Commitment	1
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	1
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, after Year Five	0
Baltimore Gas and Electric Company
Other Commitments [Line Items]
Other Commitment	7
Other Commitment, to be Paid, Remainder of Fiscal Year	3
Other Commitment, to be Paid, Year One	4
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Baltimore Gas and Electric Company \| Letters of Credit
Other Commitments [Line Items]
Other Commitment	4
Other Commitment, to be Paid, Remainder of Fiscal Year	2
Other Commitment, to be Paid, Year One	2
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Baltimore Gas and Electric Company \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	3
Other Commitment, to be Paid, Remainder of Fiscal Year	1
Other Commitment, to be Paid, Year One	2
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Pepco Holdings LLC
Other Commitments [Line Items]
Other Commitment	126
Other Commitment, to be Paid, Remainder of Fiscal Year	75
Other Commitment, to be Paid, Year One	26
Other Commitment, to be Paid, Year Two	6
Other Commitment, to be Paid, Year Three	5
Other Commitment, to be Paid, Year Four	4
Other Commitment, to be Paid, Year Five and Beyond	10
Guarantor Obligations, Maximum Exposure, Undiscounted	66
Pepco Holdings LLC \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	97
Other Commitment, to be Paid, Remainder of Fiscal Year	75
Other Commitment, to be Paid, Year One	22
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Pepco Holdings LLC \| Guaranteed lease residual values
Other Commitments [Line Items]
Other Commitment	29
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	4
Other Commitment, to be Paid, Year Two	6
Other Commitment, to be Paid, Year Three	5
Other Commitment, to be Paid, Year Four	4
Other Commitment, to be Paid, Year Five and Beyond	10
Potomac Electric Power Company
Other Commitments [Line Items]
Other Commitment	95
Other Commitment, to be Paid, Remainder of Fiscal Year	71
Other Commitment, to be Paid, Year One	15
Other Commitment, to be Paid, Year Two	3
Other Commitment, to be Paid, Year Three	2
Other Commitment, to be Paid, Year Four	1
Other Commitment, to be Paid, Year Five and Beyond	3
Guarantor Obligations, Maximum Exposure, Undiscounted	22
Potomac Electric Power Company \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	85
Other Commitment, to be Paid, Remainder of Fiscal Year	71
Other Commitment, to be Paid, Year One	14
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Potomac Electric Power Company \| Guaranteed lease residual values
Other Commitments [Line Items]
Other Commitment	10
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	1
Other Commitment, to be Paid, Year Two	3
Other Commitment, to be Paid, Year Three	2
Other Commitment, to be Paid, Year Four	1
Other Commitment, to be Paid, Year Five and Beyond	3
Delmarva Power and Light Company
Other Commitments [Line Items]
Other Commitment	19
Other Commitment, to be Paid, Remainder of Fiscal Year	2
Other Commitment, to be Paid, Year One	7
Other Commitment, to be Paid, Year Two	2
Other Commitment, to be Paid, Year Three	2
Other Commitment, to be Paid, Year Four	2
Other Commitment, to be Paid, Year Five and Beyond	4
Guarantor Obligations, Maximum Exposure, Undiscounted	26
Delmarva Power and Light Company \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	7
Other Commitment, to be Paid, Remainder of Fiscal Year	2
Other Commitment, to be Paid, Year One	5
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Delmarva Power and Light Company \| Guaranteed lease residual values
Other Commitments [Line Items]
Other Commitment	12
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	2
Other Commitment, to be Paid, Year Two	2
Other Commitment, to be Paid, Year Three	2
Other Commitment, to be Paid, Year Four	2
Other Commitment, to be Paid, Year Five and Beyond	4
Atlantic City Electric Company
Other Commitments [Line Items]
Other Commitment	12
Other Commitment, to be Paid, Remainder of Fiscal Year	2
Other Commitment, to be Paid, Year One	4
Other Commitment, to be Paid, Year Two	1
Other Commitment, to be Paid, Year Three	1
Other Commitment, to be Paid, Year Four	1
Other Commitment, to be Paid, Year Five and Beyond	3
Guarantor Obligations, Maximum Exposure, Undiscounted	18
Atlantic City Electric Company \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	5
Other Commitment, to be Paid, Remainder of Fiscal Year	2
Other Commitment, to be Paid, Year One	3
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Atlantic City Electric Company \| Guaranteed lease residual values
Other Commitments [Line Items]
Other Commitment	7
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	1
Other Commitment, to be Paid, Year Two	1
Other Commitment, to be Paid, Year Three	1
Other Commitment, to be Paid, Year Four	1
Other Commitment, to be Paid, Year Five and Beyond	$ 3
Minimum [Member] \| Guaranteed lease residual values
Other Commitments [Line Items]
Lessor, Operating Lease, Term of Contract	1 year
Maximum [Member] \| Guaranteed lease residual values
Other Commitments [Line Items]
Lessor, Operating Lease, Term of Contract	9 years

Commitments and Contingencies_5

Commitments and Contingencies - Schedule of Accruals for Environmental Matters (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	$ 434	$ 409
Commonwealth Edison Co
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	312	325
PECO Energy Co
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	28	25
Baltimore Gas and Electric Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	9	9
Pepco Holdings LLC
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	82	46
Potomac Electric Power Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	80	44
Delmarva Power and Light Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	1	1
Atlantic City Electric Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	1	1
Accrual For MGP Investigation And Remediation [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	345	355
Accrual For MGP Investigation And Remediation [Member] \| Commonwealth Edison Co
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	311	324
Accrual For MGP Investigation And Remediation [Member] \| PECO Energy Co
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	26	23
Accrual For MGP Investigation And Remediation [Member] \| Baltimore Gas and Electric Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	8	8
Accrual For MGP Investigation And Remediation [Member] \| Pepco Holdings LLC
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	0	0
Accrual For MGP Investigation And Remediation [Member] \| Potomac Electric Power Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	0	0
Accrual For MGP Investigation And Remediation [Member] \| Delmarva Power and Light Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	0	0
Accrual For MGP Investigation And Remediation [Member] \| Atlantic City Electric Company
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	$ 0	$ 0

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Details) $ in Billions	Aug. 04, 2022 USD ($)
Common Stock
At-the-Market Program [Line Items]
Equity Distribution Agreement	$ 1

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income - Schedule of Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 25,079	$ 25,066	$ 24,744	$ 23,656	$ 23,491	$ 34,795	$ 24,744	$ 34,795
Other comprehensive income (loss), net of income taxes	34	9	(1)	9	12	14	42	35
Ending balance	25,470	25,079	25,066	24,582	23,656	23,491	25,470	24,582
Gains (Losses) on Cash Flow Hedges
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	17	8	2	0	0	(6)	2	(6)
OCI before reclassifications	22	9	6		0
Amounts reclassified from AOCI	(1)	0	0	0	0	0
Other comprehensive income (loss), net of income taxes	21	9	6	0	0	0
Ending balance	38	17	8	0	0	0	38	0
Gains (Losses) on Cash Flow Hedges \| Exelon Generation Co L L C
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of income taxes						6
Pension and Non-Pension Postretirement Benefit Plan Items
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(647)	(647)	(640)	(701)	(713)	(2,721)	(640)	(2,721)
OCI before reclassifications	(3)	(3)	(10)		2
Amounts reclassified from AOCI	16	3	3	9	10	14
Other comprehensive income (loss), net of income taxes	13	0	(7)	9	12	14
Ending balance	(634)	(647)	(647)	(692)	(701)	(713)	(634)	(692)
Pension and Non-Pension Postretirement Benefit Plan Items \| Exelon Generation Co L L C
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of income taxes						1,994
Foreign Currency Items
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	0	0	0	0	0	(23)	0	(23)
OCI before reclassifications	0	0	0		0
Amounts reclassified from AOCI	0	0	0	0	0	0
Other comprehensive income (loss), net of income taxes	0	0	0	0	0	0
Ending balance	0	0	0	0	0	0	0	0
Foreign Currency Items \| Exelon Generation Co L L C
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of income taxes						23
Total
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(630)	(639)	(638)	(701)	(713)	(2,750)	(638)	(2,750)
OCI before reclassifications	19	6	(4)		2
Amounts reclassified from AOCI	15	3	3	9	10	14
Other comprehensive income (loss), net of income taxes	34	9	(1)	9	12	14
Ending balance	$ (596)	$ (630)	$ (639)	$ (692)	$ (701)	(713)	$ (596)	$ (692)
Total \| Exelon Generation Co L L C
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of income taxes						$ 2,023

Changes in Accumulated Other _4

Changes in Accumulated Other Comprehensive Income - Income Taxes Allocated to Other Comprehensive Income (Loss) Components (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	$ (5)	$ (3)	$ (7)	$ (11)
Pension and Non-Pension Postretirement Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	1	0	5	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	$ (7)	$ 0	$ (11)	$ 0

Supplemental Financial Inform_3

Supplemental Financial Information - Taxes Other Than Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Supplemental Statement of Operations Information [Line Items]
Utility taxes	$ 244	$ 244	$ 665	$ 667
Property	104	99	300	287
Payroll	31	28	93	92
Commonwealth Edison Co
Supplemental Statement of Operations Information [Line Items]
Utility taxes	82	84	228	233
Property	9	10	27	30
Payroll	8	7	22	21
PECO Energy Co
Supplemental Statement of Operations Information [Line Items]
Utility taxes	50	51	128	126
Property	4	4	12	12
Payroll	4	5	13	14
Baltimore Gas and Electric Company
Supplemental Statement of Operations Information [Line Items]
Utility taxes	23	22	73	70
Property	53	50	153	142
Payroll	5	4	14	13
Pepco Holdings LLC
Supplemental Statement of Operations Information [Line Items]
Utility taxes	89	87	236	238
Property	38	35	108	103
Payroll	7	7	22	21
Potomac Electric Power Company
Supplemental Statement of Operations Information [Line Items]
Utility taxes	82	79	213	216
Property	25	23	73	70
Payroll	2	2	5	5
Delmarva Power and Light Company
Supplemental Statement of Operations Information [Line Items]
Utility taxes	6	7	20	19
Property	12	11	34	31
Payroll	1	1	3	4
Atlantic City Electric Company
Supplemental Statement of Operations Information [Line Items]
Utility taxes	1	1	3	3
Property	1	1	1	2
Payroll	$ 1	$ 0	$ 3	$ 2

Supplemental Financial Inform_4

Supplemental Financial Information - Operations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other, Net [Abstract]
AFUDC - Equity	$ 40	$ 38	$ 113	$ 112
Non-service net periodic benefit cost	(18)	16	(18)	48
Commonwealth Edison Co
Other, Net [Abstract]
AFUDC - Equity	7	10	25	28
Non-service net periodic benefit cost	0	0	0	0
PECO Energy Co
Other, Net [Abstract]
AFUDC - Equity	10	7	22	22
Non-service net periodic benefit cost	0	0	0	0
Baltimore Gas and Electric Company
Other, Net [Abstract]
AFUDC - Equity	4	5	11	17
Non-service net periodic benefit cost	0	0	0	0
Pepco Holdings LLC
Other, Net [Abstract]
AFUDC - Equity	19	16	55	45
Non-service net periodic benefit cost	0	0	0	0
Potomac Electric Power Company
Other, Net [Abstract]
AFUDC - Equity	15	12	42	35
Non-service net periodic benefit cost	0	0	0	0
Delmarva Power and Light Company
Other, Net [Abstract]
AFUDC - Equity	3	2	7	5
Non-service net periodic benefit cost	0	0	0	0
Atlantic City Electric Company
Other, Net [Abstract]
AFUDC - Equity	1	2	6	5
Non-service net periodic benefit cost	$ 0	$ 0	$ 0	$ 0

Supplemental Financial Inform_5

Supplemental Financial Information - Cash Flow (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			$ 2,073	$ 2,024
Amortization of regulatory assets			537	532
Amortization of intangible assets, net			6	10
Amortization of energy contract assets and liabilities				3
Nuclear fuel				66
ARO accretion				44
Depreciation and amortization			2,616	2,679
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			152	124
Allowance for credit losses			86	130
Other decommissioning-related activity				36
Energy-related options				60
True-up adjustments to decoupling mechanisms and formula rates	$ 108	$ 64	513	92
Long-term incentive plan				35
Amortization of operating ROU asset			29	47
Change in environmental liabilities			37
AFUDC - Equity	(40)	(38)	(113)	(112)
Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(522)	(92)
Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(113)	(112)
Commonwealth Edison Co
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			815	770
Amortization of regulatory assets			230	212
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion				0
Depreciation and amortization			1,045	982
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			19	45
Allowance for credit losses			4	40
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	135	88	405	163
Long-term incentive plan				0
Amortization of operating ROU asset			2	1
Change in environmental liabilities			0
AFUDC - Equity	(7)	(10)	(25)	(28)
Commonwealth Edison Co \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(405)	(163)
Commonwealth Edison Co \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(25)	(28)
PECO Energy Co
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			287	267
Amortization of regulatory assets			10	10
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion				0
Depreciation and amortization			297	277
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			(10)	(6)
Allowance for credit losses			31	32
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	11	(5)	1	1
Long-term incentive plan				0
Amortization of operating ROU asset			0	0
Change in environmental liabilities			0
AFUDC - Equity	(10)	(7)	(22)	(22)
PECO Energy Co \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(1)	(1)
PECO Energy Co \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(22)	(22)
Baltimore Gas and Electric Company
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			381	355
Amortization of regulatory assets			106	115
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion				0
Depreciation and amortization			487	470
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			41	34
Allowance for credit losses			4	18
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	(22)	(8)	47	(40)
Long-term incentive plan				0
Amortization of operating ROU asset			4	14
Change in environmental liabilities			0
AFUDC - Equity	(4)	(5)	(11)	(17)
Baltimore Gas and Electric Company \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(47)	40
Baltimore Gas and Electric Company \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(11)	(17)
Pepco Holdings LLC
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			550	502
Amortization of regulatory assets			191	195
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion				0
Depreciation and amortization			741	697
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			74	39
Allowance for credit losses			47	42
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	(15)	(11)	59	(33)
Long-term incentive plan				0
Amortization of operating ROU asset			21	21
Change in environmental liabilities			37
AFUDC - Equity	(19)	(16)	(55)	(45)
Pepco Holdings LLC \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(69)	33
Pepco Holdings LLC \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(55)	(45)
Potomac Electric Power Company
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			232	214
Amortization of regulatory assets			97	98
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion				0
Depreciation and amortization			329	312
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			26	6
Allowance for credit losses			27	21
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	(18)	(8)	28	(15)
Long-term incentive plan				0
Amortization of operating ROU asset			5	5
Change in environmental liabilities			37
AFUDC - Equity	(15)	(12)	(42)	(35)
Potomac Electric Power Company \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(28)	15
Potomac Electric Power Company \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(42)	(35)
Delmarva Power and Light Company
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			155	141
Amortization of regulatory assets			27	31
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion				0
Depreciation and amortization			182	172
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			13	3
Allowance for credit losses			9	9
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	(2)	0	10	(3)
Long-term incentive plan				0
Amortization of operating ROU asset			6	6
Change in environmental liabilities			0
AFUDC - Equity	(3)	(2)	(7)	(5)
Delmarva Power and Light Company \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(15)	3
Delmarva Power and Light Company \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(7)	(5)
Atlantic City Electric Company
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			145	126
Amortization of regulatory assets			67	66
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion				0
Depreciation and amortization			212	192
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			10	9
Allowance for credit losses			11	12
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	5	(3)	21	(14)
Long-term incentive plan				0
Amortization of operating ROU asset			2	3
Change in environmental liabilities			0
AFUDC - Equity	$ (1)	$ (2)	(6)	(5)
Atlantic City Electric Company \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(26)	14
Atlantic City Electric Company \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			$ (6)	$ (5)

Supplemental Financial Inform_6

Supplemental Financial Information - Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 300	$ 407	$ 446	$ 672
Restricted cash	435	566	744	321
Restricted cash included in other long-term assets	212	117	83	44
Cash, restricted cash, and cash equivalents - Held for Sale				582
Total cash, restricted cash, and cash equivalents	947	1,090	1,273	1,619
Accrued Expenses [Abstract]
Compensation-related accruals	548	613
Taxes accrued	255	211
Interest accrued	391	338
Commonwealth Edison Co
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	79	67	63	131
Restricted cash	360	327	342	210
Restricted cash included in other long-term assets	212	117	83	43
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	651	511	488	384
Accrued Expenses [Abstract]
Compensation-related accruals	162	179
Taxes accrued	148	92
Interest accrued	78	124
PECO Energy Co
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	43	59	94	36
Restricted cash	9	9	9	8
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	52	68	103	44
Accrued Expenses [Abstract]
Compensation-related accruals	67	81
Taxes accrued	61	10
Interest accrued	52	47
Baltimore Gas and Electric Company
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	15	43	20	51
Restricted cash	1	24	130	4
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	16	67	150	55
Accrued Expenses [Abstract]
Compensation-related accruals	63	79
Taxes accrued	100	34
Interest accrued	59	42
Pepco Holdings LLC
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	121	198	219	136
Restricted cash	25	175	234	77
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	146	373	453	213
Accrued Expenses [Abstract]
Compensation-related accruals	99	104
Taxes accrued	120	70
Interest accrued	81	61
Potomac Electric Power Company
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	31	45	21	34
Restricted cash	25	54	77	34
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	56	99	98	68
Accrued Expenses [Abstract]
Compensation-related accruals	27	29
Taxes accrued	88	52
Interest accrued	38	32
Delmarva Power and Light Company
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	5	31	49	28
Restricted cash	1	121	157	43
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	6	152	206	71
Accrued Expenses [Abstract]
Compensation-related accruals	17	20
Taxes accrued	19	8
Interest accrued	24	9
Atlantic City Electric Company
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	14	72	112	29
Restricted cash	0	0	0	0
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	14	72	$ 112	$ 29
Accrued Expenses [Abstract]
Compensation-related accruals	14	16
Taxes accrued	13	12
Interest accrued	$ 17	$ 14

Related Party Transactions - Ut

Related Party Transactions - Utility Registrants' expense with Generation (Details) - Exelon Generation Co L L C $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Operating revenues from affiliates	$ 59
PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Operating revenues from affiliates	33
Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Operating revenues from affiliates	18
Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Operating revenues from affiliates	51
Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Operating revenues from affiliates	39
Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Operating revenues from affiliates	10
Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Operating revenues from affiliates	$ 2

Related Party Transactions - BS

Related Party Transactions - BSC and PHISCO Service Companies (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Exelon Business Services Co Affiliate
Related Party Transaction [Line Items]
Related party transaction capitalized costs support services	$ 162	$ 156	$ 502	$ 500
Exelon Business Services Co Affiliate \| Commonwealth Edison Co
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	92	69	263	234
Related party transaction capitalized costs support services	71	70	230	222
Exelon Business Services Co Affiliate \| PECO Energy Co
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	55	44	160	140
Related party transaction capitalized costs support services	29	24	89	80
Exelon Business Services Co Affiliate \| Baltimore Gas and Electric Company
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	58	46	166	148
Related party transaction capitalized costs support services	23	26	69	86
Exelon Business Services Co Affiliate \| Pepco Holdings LLC
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	50	39	135	135
Related party transaction capitalized costs support services	39	36	114	112
Exelon Business Services Co Affiliate \| Potomac Electric Power Company
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	30	24	85	80
Related party transaction capitalized costs support services	13	13	41	41
Exelon Business Services Co Affiliate \| Delmarva Power and Light Company
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	19	16	54	51
Related party transaction capitalized costs support services	12	11	32	34
Exelon Business Services Co Affiliate \| Atlantic City Electric Company
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	16	13	45	42
Related party transaction capitalized costs support services	13	12	39	37
PHI Service Co Affiliate
Related Party Transaction [Line Items]
Related party transaction capitalized costs support services	25	20	74	60
PHI Service Co Affiliate \| Pepco Holdings LLC
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	0	0	0	0
Related party transaction capitalized costs support services	24	20	73	60
PHI Service Co Affiliate \| Potomac Electric Power Company
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	31	28	91	86
Related party transaction capitalized costs support services	9	8	30	24
PHI Service Co Affiliate \| Delmarva Power and Light Company
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	24	24	73	73
Related party transaction capitalized costs support services	7	7	22	20
PHI Service Co Affiliate \| Atlantic City Electric Company
Related Party Transaction [Line Items]
Operating and maintenance from affiliates	23	20	67	63
Related party transaction capitalized costs support services	$ 7	$ 5	$ 20	$ 16

Related Party Transactions - Cu

Related Party Transactions - Current Receivables From/Payables To Affiliates (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Related Party
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	$ 234	$ 255
Accounts payable	5	5
Commonwealth Edison Co \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	62	74
Commonwealth Edison Co \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Commonwealth Edison Co \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Commonwealth Edison Co \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Commonwealth Edison Co \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Commonwealth Edison Co \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Commonwealth Edison Co \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Commonwealth Edison Co \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	3	3
Commonwealth Edison Co \| Related Party
Related Party Transaction [Line Items]
Accounts payable	62	74
Receivables from affiliates	3	3
PECO Energy Co \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	37	42
PECO Energy Co \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PECO Energy Co \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PECO Energy Co \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PECO Energy Co \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PECO Energy Co \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	1	2
PECO Energy Co \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	2
PECO Energy Co \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PECO Energy Co \| Related Party
Related Party Transaction [Line Items]
Accounts payable	37	42
Receivables from affiliates	1	4
Baltimore Gas and Electric Company \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	33	39
Baltimore Gas and Electric Company \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Baltimore Gas and Electric Company \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Baltimore Gas and Electric Company \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Baltimore Gas and Electric Company \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Baltimore Gas and Electric Company \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Baltimore Gas and Electric Company \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Baltimore Gas and Electric Company \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Baltimore Gas and Electric Company \| Related Party
Related Party Transaction [Line Items]
Accounts payable	33	39
Receivables from affiliates	0	0
Pepco Holdings LLC \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	17	14
Pepco Holdings LLC \| Related Party
Related Party Transaction [Line Items]
Accounts payable	59	66
Receivables from affiliates	3	2
Potomac Electric Power Company \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	32	34
Potomac Electric Power Company \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Potomac Electric Power Company \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Potomac Electric Power Company \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Potomac Electric Power Company \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Potomac Electric Power Company \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Potomac Electric Power Company \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Potomac Electric Power Company \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Potomac Electric Power Company \| Related Party
Related Party Transaction [Line Items]
Accounts payable	32	34
Receivables from affiliates	0	0
Delmarva Power and Light Company \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	25	22
Delmarva Power and Light Company \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Delmarva Power and Light Company \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Delmarva Power and Light Company \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Delmarva Power and Light Company \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Delmarva Power and Light Company \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Delmarva Power and Light Company \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Delmarva Power and Light Company \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Delmarva Power and Light Company \| Related Party
Related Party Transaction [Line Items]
Accounts payable	25	22
Receivables from affiliates	0	0
Atlantic City Electric Company \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	22	26
Atlantic City Electric Company \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Atlantic City Electric Company \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Atlantic City Electric Company \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Atlantic City Electric Company \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Atlantic City Electric Company \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Atlantic City Electric Company \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Atlantic City Electric Company \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	3	1
Atlantic City Electric Company \| Related Party
Related Party Transaction [Line Items]
Accounts payable	22	26
Receivables from affiliates	3	1
Business Services Company \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	57	66
Business Services Company \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	31	39
Business Services Company \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	31	38
Business Services Company \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	6	4
Business Services Company \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	16	20
Business Services Company \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	13	12
Business Services Company \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	11	14
Business Services Company \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	(1)	0
Business Services Company \| Related Party
Related Party Transaction [Line Items]
Receivables from affiliates	164	193
PHI Service Company \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PHI Service Company \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PHI Service Company \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PHI Service Company \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
PHI Service Company \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	15	13
PHI Service Company \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	11	8
PHI Service Company \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	10	9
PHI Service Company \| Other Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	1	0
PHI Service Company \| Related Party
Related Party Transaction [Line Items]
Receivables from affiliates	37	30
Other Legal Entities \| Affiliated Entity
Related Party Transaction [Line Items]
Accounts payable	6	4
Other Legal Entities \| Commonwealth Edison Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	5	8
Other Legal Entities \| PECO Energy Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	6	3
Other Legal Entities \| Baltimore Gas And Electric Company Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	2	1
Other Legal Entities \| Pepco Holdings LLC Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	11	10
Other Legal Entities \| Potomac Electric Power Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	1	1
Other Legal Entities \| Delmarva Power and Light Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	0	0
Other Legal Entities \| Atlantic City Electric Co Affiliate
Related Party Transaction [Line Items]
Related party transaction, due from (to) related party, current	1	1
Other Legal Entities \| Related Party
Related Party Transaction [Line Items]
Receivables from affiliates	$ 26	$ 24

Related Party Transactions - Lo

Related Party Transactions - Long Term Debt to Financing Trusts (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Long-term debt to financing trusts	$ 390	$ 390
ComEd Financing Three Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	206	206
PECO Trust Three Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	81	81
PECO Trust Four Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	103	103
Related Party
Related Party Transaction [Line Items]
Long-term debt to financing trusts	390	390
Commonwealth Edison Co \| ComEd Financing Three Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	205	205
Commonwealth Edison Co \| PECO Trust Three Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	0	0
Commonwealth Edison Co \| PECO Trust Four Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	0	0
Commonwealth Edison Co \| Related Party
Related Party Transaction [Line Items]
Long-term debt to financing trusts	205	205
PECO Energy Co \| ComEd Financing Three Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	0	0
PECO Energy Co \| PECO Trust Three Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	81	81
PECO Energy Co \| PECO Trust Four Affiliate
Related Party Transaction [Line Items]
Long-term debt to financing trusts	103	103
PECO Energy Co \| Related Party
Related Party Transaction [Line Items]
Long-term debt to financing trusts	$ 184	$ 184