Pepco 10-Q2 Aug 232023 Q2 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page	6 Months Ended
Cover Page	Jun. 30, 2023 shares
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 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	995,219,195
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001109357
Amendment Flag	false
Commonwealth Edison Co [Member]
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	127,021,395
Entity Central Index Key	0000022606
PECO Energy Co [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
Entity Incorporation, State or Country Code	DC
VIRGINIA \| Potomac Electric Power Company [Member]
Entity Incorporation, State or Country Code	VA
VIRGINIA \| Delmarva Power and Light Company [Member]
Entity Incorporation, State or Country Code	VA
DELAWARE \| Delmarva Power and Light Company [Member]
Entity Incorporation, State or Country Code	DE

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating revenues
Revenues from alternative revenue programs	$ 126	$ (2)	$ 404	$ 27
Total operating revenues	4,818	4,239	10,380	9,566
Operating expenses
Depreciation and amortization	866	830	1,727	1,647
Taxes other than income taxes	324	330	679	684
Total operating expenses	4,114	3,543	8,571	7,971
Gain (loss) on sale of assets and businesses	0	(2)	0	(2)
Operating income (loss)	704	694	1,809	1,593
Other income and (deductions)
Interest expense, net	(421)	(352)	(828)	(684)
Other, net	139	175	249	313
Total other income and (deductions)	(288)	(183)	(591)	(384)
Income (Loss) before income taxes	416	511	1,218	1,209
Income taxes	73	46	206	263
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	343	465	1,012	946
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	0	0	117
Net income (loss)	343	465	1,012	1,063
Net income (loss) attributable to noncontrolling interests	0	0	0	1
Net Income (Loss) Available to Common Stockholders, Basic	343	465	1,012	1,062
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic	343	465	1,012	946
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic	0	0	0	116
Other comprehensive income, net of income taxes
Prior service benefit reclassified to periodic benefit cost	0	2	0	2
Actuarial loss reclassified to periodic benefit cost	3	10	6	24
Pension and non-pension postretirement benefit plans valuation adjustment	(3)	0	(13)	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	9	0	15	0
Other comprehensive income	9	12	8	26
Comprehensive income	352	477	1,020	1,089
Comprehensive income attributable to noncontrolling interests	0	0	0	1
Comprehensive income attributable to common shareholders/membership interest	$ 352	$ 477	$ 1,020	$ 1,088
Average shares of common stock outstanding:
Basic average shares of common stock outstanding	995	981	995	981
Assumed exercise and/or distributions of stock-based awards	1	1	1	1
Diluted average shares of common stock outstanding	996	982	996	982
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.34	$ 0.47	$ 1.02	$ 0.96
Income (Loss) from Continuing Operations, Per Diluted Share	0.34	0.47	1.02	0.96
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	0	0	0.12
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	$ 0	$ 0	$ 0	$ 0.12
Related Party
Operating expenses
Purchased power and/or fuel from affiliates	$ 0	$ 0	$ 0	$ 159
Other income and (deductions)
Interest Expense, Other	(6)	(6)	(12)	(13)
Nonrelated Party
Operating expenses
Operating and maintenance	1,197	1,109	2,347	2,288
Commonwealth Edison Co [Member]
Operating revenues
Revenues from alternative revenue programs	118	35	270	75
Total operating revenues	1,901	1,425	3,568	3,158
Operating expenses
Depreciation and amortization	350	328	688	649
Taxes other than income taxes	88	90	182	185
Total operating expenses	1,478	1,039	2,734	2,444
Gain (loss) on sale of assets and businesses	0	(2)	0	(2)
Operating income (loss)	423	384	834	712
Other income and (deductions)
Interest expense, net	(117)	(101)	(230)	(197)
Other, net	17	13	34	26
Total other income and (deductions)	(103)	(91)	(203)	(178)
Income (Loss) before income taxes	320	293	631	534
Income taxes	71	66	142	119
Net income (loss)	249	227	489	415
Other comprehensive income, net of income taxes
Comprehensive income	249	227	489	415
Commonwealth Edison Co [Member] \| Related Party
Operating revenues
Revenues from Related Parties	2	3	5	8
Operating expenses
Purchased power and/or fuel from affiliates	0	0	0	59
Operating and maintenance	88	80	171	166
Other income and (deductions)
Interest Expense, Other	(3)	(3)	(7)	(7)
Commonwealth Edison Co [Member] \| Nonrelated Party
Operating expenses
Operating and maintenance	267	258	521	523
PECO Energy Co [Member]
Operating revenues
Revenues from alternative revenue programs	(5)	0	(10)	6
Total operating revenues	828	816	1,940	1,863
Operating expenses
Depreciation and amortization	99	93	197	185
Taxes other than income taxes	47	48	97	95
Total operating expenses	687	639	1,590	1,432
Operating income (loss)	141	177	350	431
Other income and (deductions)
Interest expense, net	(45)	(40)	(90)	(78)
Other, net	6	8	15	16
Total other income and (deductions)	(42)	(35)	(82)	(68)
Income (Loss) before income taxes	99	142	268	363
Income taxes	2	9	5	24
Net income (loss)	97	133	263	339
Other comprehensive income, net of income taxes
Comprehensive income	97	133	263	339
PECO Energy Co [Member] \| Related Party
Operating revenues
Revenues from Related Parties	2	1	4	2
Operating expenses
Purchased power and/or fuel from affiliates	0	0	0	33
Operating and maintenance	53	47	105	99
Other income and (deductions)
Interest Expense, Other	(3)	(3)	(7)	(6)
PECO Energy Co [Member] \| Nonrelated Party
Operating expenses
Operating and maintenance	186	168	405	364
Baltimore Gas and Electric Company [Member]
Operating revenues
Revenues from alternative revenue programs	4	(20)	70	(32)
Total operating revenues	797	786	2,053	1,940
Operating expenses
Depreciation and amortization	158	152	325	322
Taxes other than income taxes	76	71	159	148
Total operating expenses	704	717	1,667	1,636
Operating income (loss)	93	69	386	304
Other income and (deductions)
Interest expense, net	(44)	(36)	(88)	(71)
Other, net	5	5	8	11
Total other income and (deductions)	(39)	(31)	(80)	(60)
Income (Loss) before income taxes	54	38	306	244
Income taxes	12	1	65	10
Net income (loss)	42	37	241	234
Other comprehensive income, net of income taxes
Comprehensive income	42	37	241	234
Baltimore Gas and Electric Company [Member] \| Related Party
Operating revenues
Revenues from Related Parties	2	3	4	10
Operating expenses
Purchased power and/or fuel from affiliates	0	0	0	18
Operating and maintenance	54	51	108	102
Baltimore Gas and Electric Company [Member] \| Nonrelated Party
Operating expenses
Operating and maintenance	144	154	311	321
Pepco Holdings LLC [Member]
Operating revenues
Revenues from alternative revenue programs	9	(17)	74	(22)
Total operating revenues	1,305	1,221	2,841	2,626
Operating expenses
Depreciation and amortization	243	240	484	459
Taxes other than income taxes	112	114	232	233
Total operating expenses	1,126	1,066	2,423	2,282
Operating income (loss)	179	155	418	344
Other income and (deductions)
Interest expense, net	(81)	(73)	(157)	(143)
Other, net	25	19	51	37
Total other income and (deductions)	(56)	(54)	(106)	(106)
Income (Loss) before income taxes	123	101	312	238
Income taxes	20	1	54	8
Net income (loss)	103	100	258	230
Other comprehensive income, net of income taxes
Comprehensive income attributable to common shareholders/membership interest	103	100	258	230
Pepco Holdings LLC [Member] \| Related Party
Operating revenues
Revenues from Related Parties	2	2	4	6
Operating expenses
Purchased power and/or fuel from affiliates	0	0	0	50
Operating and maintenance	44	47	86	98
Pepco Holdings LLC [Member] \| Nonrelated Party
Operating expenses
Operating and maintenance	260	245	527	493
Potomac Electric Power Company [Member]
Operating revenues
Revenues from alternative revenue programs	7	(1)	46	(7)
Total operating revenues	642	581	1,351	1,195
Operating expenses
Depreciation and amortization	109	105	216	213
Taxes other than income taxes	88	92	183	186
Total operating expenses	541	487	1,151	1,034
Operating income (loss)	101	94	200	161
Other income and (deductions)
Interest expense, net	(43)	(38)	(81)	(74)
Other, net	16	13	33	26
Total other income and (deductions)	(27)	(25)	(48)	(48)
Income (Loss) before income taxes	74	69	152	113
Income taxes	10	(1)	22	(3)
Net income (loss)	64	70	130	116
Other comprehensive income, net of income taxes
Comprehensive income	64	70	130	116
Potomac Electric Power Company [Member] \| Related Party
Operating revenues
Revenues from Related Parties	2	2	3	2
Operating expenses
Purchased power and/or fuel from affiliates	0	0	0	39
Operating and maintenance	58	56	115	115
Potomac Electric Power Company [Member] \| Nonrelated Party
Operating expenses
Operating and maintenance	82	72	175	145
Delmarva Power and Light Company [Member]
Operating revenues
Revenues from alternative revenue programs	3	(2)	12	(3)
Total operating revenues	349	332	823	763
Operating expenses
Depreciation and amortization	60	56	121	113
Taxes other than income taxes	18	17	37	35
Total operating expenses	305	296	693	653
Operating income (loss)	44	36	130	110
Other income and (deductions)
Interest expense, net	(18)	(17)	(36)	(33)
Other, net	4	4	8	6
Total other income and (deductions)	(14)	(13)	(28)	(27)
Income (Loss) before income taxes	30	23	102	83
Income taxes	5	2	17	6
Net income (loss)	25	21	85	77
Other comprehensive income, net of income taxes
Comprehensive income	25	21	85	77
Delmarva Power and Light Company [Member] \| Related Party
Operating revenues
Revenues from Related Parties	2	2	3	3
Operating expenses
Purchased power and/or fuel from affiliates	0	0	0	10
Operating and maintenance	43	43	84	84
Delmarva Power and Light Company [Member] \| Nonrelated Party
Operating expenses
Operating and maintenance	45	45	91	97
Atlantic City Electric Company [Member]
Operating revenues
Revenues from alternative revenue programs	(1)	(15)	16	(12)
Total operating revenues	317	309	670	658
Operating expenses
Depreciation and amortization	68	72	135	118
Taxes other than income taxes	3	2	4	4
Total operating expenses	280	283	577	593
Operating income (loss)	37	26	93	65
Other income and (deductions)
Interest expense, net	(17)	(17)	(34)	(32)
Other, net	4	2	9	5
Total other income and (deductions)	(13)	(15)	(25)	(27)
Income (Loss) before income taxes	24	11	68	38
Income taxes	6	0	17	1
Net income (loss)	18	11	51	37
Other comprehensive income, net of income taxes
Comprehensive income	18	11	51	37
Atlantic City Electric Company [Member] \| Related Party
Operating revenues
Revenues from Related Parties	1	1	1	2
Operating expenses
Purchased power and/or fuel from affiliates	0	0	0	2
Operating and maintenance	37	36	74	73
Atlantic City Electric Company [Member] \| Nonrelated Party
Operating expenses
Operating and maintenance	48	50	91	97
Electricity, US Regulated
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	4,434	3,934	8,896	8,415
Operating expenses
Purchased power and/or fuel	1,669	1,167	3,402	2,748
Electricity, US Regulated \| Commonwealth Edison Co [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	1,781	1,387	3,293	3,075
Operating expenses
Purchased power and/or fuel	685	283	1,172	862
Electricity, US Regulated \| PECO Energy Co [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	723	707	1,521	1,441
Operating expenses
Purchased power and/or fuel	267	244	597	472
Electricity, US Regulated \| Baltimore Gas and Electric Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	670	642	1,449	1,377
Operating expenses
Purchased power and/or fuel	261	241	604	526
Electricity, US Regulated \| Pepco Holdings LLC [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	1,265	1,199	2,637	2,522
Operating expenses
Purchased power and/or fuel	455	401	1,027	888
Electricity, US Regulated \| Potomac Electric Power Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	633	580	1,302	1,200
Operating expenses
Purchased power and/or fuel	204	162	462	336
Electricity, US Regulated \| Delmarva Power and Light Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	315	295	682	643
Operating expenses
Purchased power and/or fuel	127	116	293	253
Electricity, US Regulated \| Atlantic City Electric Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	317	323	653	668
Operating expenses
Purchased power and/or fuel	124	123	273	299
Natural Gas, US Regulated
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	258	307	1,080	1,124
Operating expenses
Purchased power and/or fuel	58	107	416	445
Natural Gas, US Regulated \| PECO Energy Co [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	108	108	425	414
Operating expenses
Purchased power and/or fuel	35	39	189	184
Natural Gas, US Regulated \| Baltimore Gas and Electric Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	121	161	530	585
Operating expenses
Purchased power and/or fuel	11	48	160	199
Natural Gas, US Regulated \| Pepco Holdings LLC [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	29	37	126	120
Operating expenses
Purchased power and/or fuel	12	19	67	61
Natural Gas, US Regulated \| Delmarva Power and Light Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	29	37	126	120
Operating expenses
Purchased power and/or fuel	$ 12	$ 19	$ 67	$ 61

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net income (loss)	$ 1,012	$ 1,063
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	1,727	1,854
Gain on sales of assets and businesses	0	(8)
Deferred income taxes and amortization of investment tax credits	94	143
Net fair value changes related to derivatives	4	(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	(222)	276
Changes in assets and liabilities:
Accounts receivable	387	(795)
Inventories	44	12
Accounts payable and accrued expenses	(734)	544
Option premiums paid, net	0	(39)
Collateral received (posted), net	(187)	1,689
Income taxes	97	23
Regulatory assets and liabilities, net	(516)	(376)
Pension and non-pension postretirement benefit contributions	(85)	(585)
Other assets and liabilities	140	(723)
Net Cash Provided by (Used in) Operating Activities, Total	1,761	3,240
Cash flows from investing activities
Capital expenditures	(3,685)	(3,507)
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	10	4
Net Cash Provided by (Used in) Investing Activities, Total	(3,675)	(3,346)
Cash flows from financing activities
Changes in short-term borrowings	(1,600)	(597)
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)	(350)
Issuance of long-term debt	5,200	5,151
Retirement of long-term debt	(1,209)	(1,707)
Dividends paid on common stock	(717)	(663)
Proceeds from employee stock plans	19	17
Transfer of cash, restricted cash, and cash equivalents to Constellation	0	(2,594)
Other financing activities	(84)	(84)
Net cash flows provided by financing activities	1,859	323
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	(55)	217
Cash, restricted cash, and cash equivalents at beginning of period	1,090	1,619
Cash, restricted cash, and cash equivalents at end of period	1,035	1,836
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(164)	(276)
Increase in deferred purchase price	0	348
Increase in PPE related to ARO update	0	(335)
Exelon Generation Co L L C [Member]
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	0	207
Gain on sales of assets and businesses	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)
Cash flows from investing activities
Capital expenditures	0	(227)
Collection of deferred purchase price	0	169
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	0	(128)
Increase in deferred purchase price	0	348
Increase in PPE related to ARO update	0	335
Commonwealth Edison Co [Member]
Cash flows from operating activities
Net income (loss)	489	415
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	688	649
Deferred income taxes and amortization of investment tax credits	106	122
Other non-cash operating activities	(260)	(18)
Changes in assets and liabilities:
Accounts receivable	(30)	(163)
Receivables from payables to affiliates, net	(3)	(43)
Inventories	(43)	(2)
Accounts payable and accrued expenses	(311)	123
Collateral received (posted), net	25	60
Income taxes	16	(19)
Regulatory assets and liabilities, net	(459)	(267)
Pension and non-pension postretirement benefit contributions	(24)	(178)
Other assets and liabilities	110	(91)
Net Cash Provided by (Used in) Operating Activities, Total	304	588
Cash flows from investing activities
Capital expenditures	(1,262)	(1,208)
Other investing activities	3	15
Net Cash Provided by (Used in) Investing Activities, Total	(1,259)	(1,193)
Cash flows from financing activities
Changes in short-term borrowings	(130)	0
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	(374)	(289)
Contributions from parent	372	335
Other financing activities	(13)	(12)
Net cash flows provided by financing activities	1,080	784
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	125	179
Cash, restricted cash, and cash equivalents at beginning of period	511	384
Cash, restricted cash, and cash equivalents at end of period	636	563
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(7)	(44)
PECO Energy Co [Member]
Cash flows from operating activities
Net income (loss)	263	339
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	197	185
Deferred income taxes and amortization of investment tax credits	(26)	14
Other non-cash operating activities	12	4
Changes in assets and liabilities:
Accounts receivable	182	(29)
Receivables from payables to affiliates, net	(3)	(40)
Inventories	52	(8)
Accounts payable and accrued expenses	(167)	5
Income taxes	56	49
Regulatory assets and liabilities, net	14	(24)
Pension and non-pension postretirement benefit contributions	(1)	(13)
Other assets and liabilities	(34)	(70)
Net Cash Provided by (Used in) Operating Activities, Total	545	412
Cash flows from investing activities
Capital expenditures	(707)	(658)
Changes in Exelon/PHI intercompany money pool	(225)	0
Other investing activities	0	5
Net Cash Provided by (Used in) Investing Activities, Total	(932)	(653)
Cash flows from financing activities
Changes in short-term borrowings	(239)	210
Issuance of long-term debt	575	350
Retirement of long-term debt	(50)	(350)
Dividends paid on common stock	(202)	(200)
Contributions from parent	330	227
Other financing activities	(4)	(8)
Net cash flows provided by financing activities	410	229
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	23	(12)
Cash, restricted cash, and cash equivalents at beginning of period	68	44
Cash, restricted cash, and cash equivalents at end of period	91	32
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	3	(11)
Baltimore Gas and Electric Company [Member]
Cash flows from operating activities
Net income (loss)	241	234
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	325	322
Deferred income taxes and amortization of investment tax credits	38	13
Other non-cash operating activities	(36)	79
Changes in assets and liabilities:
Accounts receivable	185	(14)
Receivables from payables to affiliates, net	(8)	(11)
Inventories	51	(27)
Accounts payable and accrued expenses	(114)	(12)
Collateral received (posted), net	(22)	190
Income taxes	8	(27)
Regulatory assets and liabilities, net	(83)	(36)
Pension and non-pension postretirement benefit contributions	(11)	(59)
Other assets and liabilities	37	24
Net Cash Provided by (Used in) Operating Activities, Total	611	676
Cash flows from investing activities
Capital expenditures	(656)	(578)
Other investing activities	4	7
Net Cash Provided by (Used in) Investing Activities, Total	(652)	(571)
Cash flows from financing activities
Changes in short-term borrowings	(408)	(130)
Issuance of long-term debt	700	500
Retirement of long-term debt	(300)	0
Dividends paid on common stock	(158)	(150)
Contributions from parent	237	186
Other financing activities	(7)	(7)
Net cash flows provided by financing activities	64	399
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	23	504
Cash, restricted cash, and cash equivalents at beginning of period	67	55
Cash, restricted cash, and cash equivalents at end of period	90	559
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(60)	(21)
Pepco Holdings LLC [Member]
Cash flows from operating activities
Net income (loss)	258	230
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	484	459
Deferred income taxes and amortization of investment tax credits	26	(7)
Other non-cash operating activities	20	76
Changes in assets and liabilities:
Accounts receivable	55	(92)
Receivables from payables to affiliates, net	(8)	(53)
Inventories	(14)	(7)
Accounts payable and accrued expenses	(25)	10
Collateral received (posted), net	(191)	403
Income taxes	6	(2)
Regulatory assets and liabilities, net	8	(71)
Pension and non-pension postretirement benefit contributions	(11)	(70)
Other assets and liabilities	(80)	(86)
Net Cash Provided by (Used in) Operating Activities, Total	528	790
Cash flows from investing activities
Capital expenditures	(1,022)	(776)
Other investing activities	8	3
Net Cash Provided by (Used in) Investing Activities, Total	(1,014)	(773)
Cash flows from financing activities
Changes in short-term borrowings	(377)	(425)
Issuance of long-term debt	450	700
Retirement of long-term debt	0	(200)
Increase (Decrease) in Due to Affiliates, Current	8	17
Payments of Distributions to Affiliates	(212)	(395)
Proceeds from Contributions from Affiliates	405	704
Other financing activities	(25)	(12)
Net cash flows provided by financing activities	249	389
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	(237)	406
Cash, restricted cash, and cash equivalents at beginning of period	373	213
Cash, restricted cash, and cash equivalents at end of period	136	619
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(91)	(48)
Potomac Electric Power Company [Member]
Cash flows from operating activities
Net income (loss)	130	116
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	216	213
Deferred income taxes and amortization of investment tax credits	12	(7)
Other non-cash operating activities	3	17
Changes in assets and liabilities:
Accounts receivable	12	(62)
Receivables from payables to affiliates, net	(2)	(39)
Inventories	(10)	(6)
Accounts payable and accrued expenses	(21)	6
Collateral received (posted), net	(26)	85
Income taxes	(1)	(24)
Regulatory assets and liabilities, net	(6)	(36)
Pension and non-pension postretirement benefit contributions	(8)	(7)
Other assets and liabilities	7	(15)
Net Cash Provided by (Used in) Operating Activities, Total	306	241
Cash flows from investing activities
Capital expenditures	(483)	(402)
Other investing activities	8	2
Net Cash Provided by (Used in) Investing Activities, Total	(475)	(400)
Cash flows from financing activities
Changes in short-term borrowings	(299)	(132)
Issuance of long-term debt	250	400
Retirement of long-term debt	0	(200)
Increase (Decrease) in Due to Affiliates, Current	52	73
Dividends paid on common stock	(115)	(300)
Contributions from parent	243	387
Other financing activities	(19)	(6)
Net cash flows provided by financing activities	112	222
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	(57)	63
Cash, restricted cash, and cash equivalents at beginning of period	99	68
Cash, restricted cash, and cash equivalents at end of period	42	131
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(43)	(24)
Delmarva Power and Light Company [Member]
Cash flows from operating activities
Net income (loss)	85	77
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	121	113
Deferred income taxes and amortization of investment tax credits	3	3
Other non-cash operating activities	2	13
Changes in assets and liabilities:
Accounts receivable	48	(8)
Receivables from payables to affiliates, net	1	(3)
Inventories	5	1
Accounts payable and accrued expenses	(9)	12
Collateral received (posted), net	(121)	180
Income taxes	11	6
Regulatory assets and liabilities, net	25	(11)
Pension and non-pension postretirement benefit contributions	0	(1)
Other assets and liabilities	10	1
Net Cash Provided by (Used in) Operating Activities, Total	181	383
Cash flows from investing activities
Capital expenditures	(258)	(194)
Changes in Exelon/PHI intercompany money pool	(102)	(73)
Other investing activities	0	2
Net Cash Provided by (Used in) Investing Activities, Total	(360)	(265)
Cash flows from financing activities
Changes in short-term borrowings	(115)	(149)
Issuance of long-term debt	125	125
Dividends paid on common stock	(60)	(56)
Contributions from parent	99	144
Other financing activities	(4)	(4)
Net cash flows provided by financing activities	45	60
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	(134)	178
Cash, restricted cash, and cash equivalents at beginning of period	152	71
Cash, restricted cash, and cash equivalents at end of period	18	249
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(3)	(5)
Atlantic City Electric Company [Member]
Cash flows from operating activities
Net income (loss)	51	37
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	135	118
Deferred income taxes and amortization of investment tax credits	12	0
Other non-cash operating activities	(3)	25
Changes in assets and liabilities:
Accounts receivable	(5)	(20)
Receivables from payables to affiliates, net	(5)	(10)
Inventories	(9)	(2)
Accounts payable and accrued expenses	15	9
Collateral received (posted), net	(45)	137
Income taxes	(4)	8
Regulatory assets and liabilities, net	(12)	(11)
Pension and non-pension postretirement benefit contributions	0	(7)
Other assets and liabilities	(89)	(63)
Net Cash Provided by (Used in) Operating Activities, Total	41	221
Cash flows from investing activities
Capital expenditures	(275)	(179)
Net Cash Provided by (Used in) Investing Activities, Total	(275)	(179)
Cash flows from financing activities
Changes in short-term borrowings	37	(144)
Issuance of long-term debt	75	175
Increase (Decrease) in Due to Affiliates, Current	50	0
Dividends paid on common stock	(36)	(38)
Contributions from parent	63	173
Other financing activities	(3)	(4)
Net cash flows provided by financing activities	186	162
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	(48)	204
Cash, restricted cash, and cash equivalents at beginning of period	72	29
Cash, restricted cash, and cash equivalents at end of period	24	233
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	$ (44)	$ (19)

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) shares in Millions, $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 399	$ 407
Restricted cash and cash equivalents	435	566
Accounts receivable
Customer accounts receivable	2,333	2,544
Customer allowance for credit losses	(323)	(327)
Customer accounts receivable, net	2,010	2,217
Other accounts receivable	1,107	1,426
Other allowance for credit losses	(87)	(82)
Other accounts receivable, net	1,020	1,344
Inventories, net
Fossil fuel and emission allowances	88	208
Materials and supplies	622	547
Regulatory assets, current	2,505	1,641
Other	463	406
Total current assets	7,542	7,336
Accumulated depreciation and amortization	16,819	15,930
Property, plant and equipment, net	71,300	69,076
Deferred debits and other assets
Regulatory assets, noncurrent	7,972	8,037
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	3,120	2,897
Investments	238	232
Other	1,278	1,141
Total deferred debits and other assets	19,238	18,937
Total assets	98,080	95,349
Current Liabilities
Short-term borrowings	1,236	2,586
Long-term debt due within one year	1,505	1,802
Accrued expenses	1,220	1,226
Regulatory liabilities, current	439	437
Mark-to-market derivative liabilities, current	31	8
Unamortized energy contract liabilities, current	8	10
Other	986	1,155
Total current liabilities	7,936	10,611
Long-term debt	39,492	35,272
Long-term debt to Financing Trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,547	11,250
Regulatory liabilities, noncurrent	9,406	9,112
Asset retirement obligations, noncurrent	273	269
Pension obligations	1,061	1,109
Non-pension postretirement benefit obligations	510	507
Mark-to-market derivative liabilities, noncurrent	109	83
Unamortized energy contract liabilities, noncurrent	30	35
Other	2,247	1,967
Total deferred credits and other liabilities	25,183	24,332
Total Liabilities	73,001	70,605
Commitments and contingencies
Common Stock, No Par Value	$ 0	$ 0
Common stock, shares authorized	2,000	2,000
Common stock, shares outstanding	995	994
Shareholders' equity
Common stock	$ 20,941	$ 20,908
Treasury Stock, Common, Shares	2	2
Treasury stock, at cost	$ (123)	$ (123)
Accumulated other comprehensive loss, net	(630)	(638)
Retained earnings/Undistributed earnings (losses)	4,891	4,597
Total shareholders’ equity	25,079	24,744
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	98,080	95,349
Related Party
Current Liabilities
Accounts payable	5	5
Long-term debt to Financing Trusts	390	390
Nonrelated Party
Current Liabilities
Accounts payable	2,506	3,382
Commonwealth Edison Co [Member]
Current Assets
Cash and cash equivalents	74	67
Restricted cash and cash equivalents	361	327
Accounts receivable
Customer accounts receivable	786	558
Customer allowance for credit losses	(67)	(59)
Customer accounts receivable, net	719	499
Other accounts receivable	234	441
Other allowance for credit losses	(18)	(17)
Other accounts receivable, net	216	424
Inventories, net
Inventories, net	238	196
Regulatory assets, current	1,609	775
Other	105	92
Total current assets	3,325	2,383
Accumulated depreciation and amortization	6,985	6,673
Property, plant and equipment, net	28,283	27,513
Deferred debits and other assets
Regulatory assets, noncurrent	2,612	2,667
Goodwill	2,625	2,625
Receivable related to Regulatory Agreement Units	2,857	2,660
Investments	6	6
Prepaid pension asset	1,222	1,206
Total deferred debits and other assets	10,064	9,765
Total assets	41,672	39,661
Current Liabilities
Short-term borrowings	697	577
Accrued expenses	396	415
Customer deposits	112	108
Regulatory liabilities, current	196	226
Mark-to-market derivative liabilities, current	24	5
Total current liabilities	2,434	2,606
Long-term debt	11,482	10,518
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	5,178	5,021
Regulatory liabilities, noncurrent	7,265	6,913
Asset retirement obligations, noncurrent	150	148
Non-pension postretirement benefit obligations	170	165
Mark-to-market derivative liabilities, noncurrent	109	79
Other	827	642
Total deferred credits and other liabilities	13,699	12,968
Total Liabilities	27,820	26,297
Commitments and contingencies
Shareholders' equity
Common stock	1,588	1,588
Other paid-in capital	10,118	9,746
Retained earnings/Undistributed earnings (losses)	2,146	2,030
Total shareholders’ equity	13,852	13,364
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	41,672	39,661
Commonwealth Edison Co [Member] \| Related Party
Accounts receivable
Customer accounts receivable, net	3	3
Accounts and Other Receivables, Net, Current	3	3
Current Liabilities
Accounts payable	71	74
Long-term debt to Financing Trusts	205	205
Commonwealth Edison Co [Member] \| Nonrelated Party
Deferred debits and other assets
Other	742	601
Current Liabilities
Accounts payable	728	1,010
Other	210	191
PECO Energy Co [Member]
Current Assets
Cash and cash equivalents	82	59
Restricted cash and cash equivalents	9	9
Accounts receivable
Customer accounts receivable	448	635
Customer allowance for credit losses	(101)	(105)
Customer accounts receivable, net	347	530
Other accounts receivable	127	153
Other allowance for credit losses	(8)	(9)
Other accounts receivable, net	119	144
Inventories, net
Fossil fuel and emission allowances	47	99
Materials and supplies	52	52
Prepaid utility taxes	68	0
Regulatory assets, current	102	80
Other	45	38
Total current assets	1,097	1,015
Accumulated depreciation and amortization	4,182	4,078
Property, plant and equipment, net	12,651	12,125
Deferred debits and other assets
Regulatory assets, noncurrent	717	652
Receivable related to Regulatory Agreement Units	263	237
Investments	32	30
Prepaid pension asset	421	413
Total deferred debits and other assets	1,459	1,362
Total assets	15,207	14,502
Current Liabilities
Short-term borrowings	0	239
Long-term debt due within one year	0	50
Accrued expenses	165	142
Customer deposits	72	63
Regulatory liabilities, current	116	75
Total current liabilities	979	1,311
Long-term debt	5,132	4,562
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,263	2,213
Regulatory liabilities, noncurrent	295	270
Asset retirement obligations, noncurrent	28	28
Non-pension postretirement benefit obligations	287	286
Other	85	85
Total deferred credits and other liabilities	2,958	2,882
Total Liabilities	9,253	8,939
Commitments and contingencies
Shareholders' equity
Common stock	4,032	3,702
Retained earnings/Undistributed earnings (losses)	1,922	1,861
Total shareholders’ equity	5,954	5,563
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	15,207	14,502
PECO Energy Co [Member] \| Related Party
Accounts receivable
Customer accounts receivable, net	1	4
Accounts and Other Receivables, Net, Current	1	4
Receivable from Exelon/PHI intercompany money pool	225	0
Current Liabilities
Accounts payable	36	42
Long-term debt to Financing Trusts	184	184
PECO Energy Co [Member] \| Nonrelated Party
Deferred debits and other assets
Other	26	30
Current Liabilities
Accounts payable	530	668
Other	60	32
Baltimore Gas and Electric Company [Member]
Current Assets
Cash and cash equivalents	89	43
Restricted cash and cash equivalents	1	24
Accounts receivable
Customer accounts receivable	440	617
Customer allowance for credit losses	(50)	(54)
Customer accounts receivable, net	390	563
Other accounts receivable	114	132
Other allowance for credit losses	(8)	(10)
Other accounts receivable, net	106	122
Inventories, net
Fossil fuel and emission allowances	34	91
Materials and supplies	71	65
Prepaid utility taxes	0	52
Regulatory assets, current	241	177
Other	18	13
Total current assets	950	1,150
Accumulated depreciation and amortization	4,737	4,583
Property, plant and equipment, net	11,673	11,338
Deferred debits and other assets
Regulatory assets, noncurrent	541	527
Investments	9	7
Prepaid pension asset	269	291
Total deferred debits and other assets	865	862
Total assets	13,488	13,350
Current Liabilities
Short-term borrowings	0	408
Long-term debt due within one year	0	300
Accrued expenses	139	159
Customer deposits	109	105
Regulatory liabilities, current	42	47
Total current liabilities	670	1,575
Long-term debt	4,601	3,907
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	1,896	1,832
Regulatory liabilities, noncurrent	789	816
Asset retirement obligations, noncurrent	30	30
Non-pension postretirement benefit obligations	161	166
Other	85	88
Total deferred credits and other liabilities	2,961	2,932
Total Liabilities	8,232	8,414
Commitments and contingencies
Shareholders' equity
Common stock	3,098	2,861
Retained earnings/Undistributed earnings (losses)	2,158	2,075
Total shareholders’ equity	5,256	4,936
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	13,488	13,350
Baltimore Gas and Electric Company [Member] \| Related Party
Accounts receivable
Customer accounts receivable, net	0	0
Current Liabilities
Accounts payable	32	39
Baltimore Gas and Electric Company [Member] \| Nonrelated Party
Deferred debits and other assets
Other	46	37
Current Liabilities
Accounts payable	316	462
Other	32	55
Pepco Holdings LLC [Member]
Current Assets
Cash and cash equivalents	110	198
Restricted cash and cash equivalents	26	175
Accounts receivable
Customer accounts receivable	659	734
Customer allowance for credit losses	(105)	(109)
Customer accounts receivable, net	554	625
Other accounts receivable	304	300
Other allowance for credit losses	(53)	(46)
Other accounts receivable, net	251	254
Inventories, net
Fossil fuel and emission allowances	7	18
Materials and supplies	261	236
Regulatory assets, current	400	455
Other	84	96
Total current assets	1,695	2,059
Accumulated depreciation and amortization	2,901	2,618
Property, plant and equipment, net	18,279	17,686
Deferred debits and other assets
Regulatory assets, noncurrent	1,589	1,610
Goodwill	4,005	4,005
Investments	141	138
Prepaid pension asset	311	353
Total deferred debits and other assets	6,267	6,337
Total assets	26,241	26,082
Current Liabilities
Short-term borrowings	37	414
Long-term debt due within one year	996	591
Accrued expenses	258	260
Customer deposits	95	88
Regulatory liabilities, current	73	76
Unamortized energy contract liabilities, current	8	10
PPA termination obligation	74	87
Total current liabilities	2,440	2,737
Long-term debt	7,554	7,529
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,967	2,895
Regulatory liabilities, noncurrent	958	1,011
Asset retirement obligations, noncurrent	60	59
Non-pension postretirement benefit obligations	45	50
Unamortized energy contract liabilities, noncurrent	30	35
Other	506	536
Total deferred credits and other liabilities	4,566	4,586
Total Liabilities	14,560	14,852
Commitments and contingencies
Shareholders' equity
Retained earnings/Undistributed earnings (losses)	(306)	(352)
Members' Equity [Abstract]
Membership interest	11,987	11,582
Total members' equity	11,681	11,230
Total liabilities and shareholders’ equity	26,241	26,082
Pepco Holdings LLC [Member] \| Related Party
Accounts receivable
Accounts and Other Receivables, Net, Current	2	2
Current Liabilities
Accounts payable	58	66
Other	52	44
Pepco Holdings LLC [Member] \| Nonrelated Party
Deferred debits and other assets
Other	221	231
Current Liabilities
Accounts payable	657	771
Other	132	330
Potomac Electric Power Company [Member]
Current Assets
Cash and cash equivalents	16	45
Restricted cash and cash equivalents	26	54
Accounts receivable
Customer accounts receivable	337	351
Customer allowance for credit losses	(50)	(47)
Customer accounts receivable, net	287	304
Other accounts receivable	178	180
Other allowance for credit losses	(31)	(25)
Other accounts receivable, net	147	155
Inventories, net
Inventories, net	145	135
Regulatory assets, current	212	235
Other	13	53
Total current assets	846	981
Accumulated depreciation and amortization	4,171	4,067
Property, plant and equipment, net	9,111	8,794
Deferred debits and other assets
Regulatory assets, noncurrent	443	437
Investments	122	119
Prepaid pension asset	259	273
Total deferred debits and other assets	881	882
Total assets	10,838	10,657
Current Liabilities
Short-term borrowings	0	299
Long-term debt due within one year	405	4
Accrued expenses	126	125
Customer deposits	43	39
Regulatory liabilities, current	11	6
Merger related obligation	27	26
Total current liabilities	1,064	1,008
Long-term debt	3,593	3,747
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	1,421	1,382
Regulatory liabilities, noncurrent	421	455
Asset retirement obligations, noncurrent	40	39
Other	260	244
Total deferred credits and other liabilities	2,142	2,120
Total Liabilities	6,799	6,875
Commitments and contingencies
Shareholders' equity
Common stock	3,010	2,767
Retained earnings/Undistributed earnings (losses)	1,029	1,015
Total shareholders’ equity	4,039	3,782
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	10,838	10,657
Potomac Electric Power Company [Member] \| Related Party
Accounts receivable
Customer accounts receivable, net	0	0
Current Liabilities
Accounts payable	32	34
Other	52	0
Potomac Electric Power Company [Member] \| Nonrelated Party
Deferred debits and other assets
Other	57	53
Current Liabilities
Accounts payable	310	382
Other	58	93
Delmarva Power and Light Company [Member]
Current Assets
Cash and cash equivalents	18	31
Restricted cash and cash equivalents	0	121
Accounts receivable
Customer accounts receivable	149	204
Customer allowance for credit losses	(21)	(21)
Customer accounts receivable, net	128	183
Other accounts receivable	54	52
Other allowance for credit losses	(9)	(7)
Other accounts receivable, net	45	45
Inventories, net
Fossil fuel and emission allowances	7	18
Materials and supplies	64	58
Regulatory assets, current	59	80
Other	23	37
Total current assets	446	573
Accumulated depreciation and amortization	1,854	1,772
Property, plant and equipment, net	4,974	4,820
Deferred debits and other assets
Regulatory assets, noncurrent	205	202
Prepaid pension asset	144	153
Total deferred debits and other assets	403	409
Total assets	5,823	5,802
Current Liabilities
Short-term borrowings	0	115
Long-term debt due within one year	584	584
Accrued expenses	46	41
Customer deposits	31	29
Regulatory liabilities, current	47	44
Total current liabilities	910	1,143
Long-term debt	1,477	1,354
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	887	869
Regulatory liabilities, noncurrent	371	380
Asset retirement obligations, noncurrent	13	13
Non-pension postretirement benefit obligations	9	9
Other	82	84
Total deferred credits and other liabilities	1,362	1,355
Total Liabilities	3,749	3,852
Commitments and contingencies
Shareholders' equity
Common stock	1,455	1,356
Retained earnings/Undistributed earnings (losses)	619	594
Total shareholders’ equity	2,074	1,950
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	5,823	5,802
Delmarva Power and Light Company [Member] \| Related Party
Accounts receivable
Customer accounts receivable, net	0	0
Receivable from Exelon/PHI intercompany money pool	102	0
Current Liabilities
Accounts payable	23	22
Delmarva Power and Light Company [Member] \| Nonrelated Party
Deferred debits and other assets
Other	54	54
Current Liabilities
Accounts payable	162	172
Other	17	136
Atlantic City Electric Company [Member]
Current Assets
Cash and cash equivalents	24	72
Restricted cash and cash equivalents	0	0
Accounts receivable
Customer accounts receivable	173	179
Customer allowance for credit losses	(34)	(41)
Customer accounts receivable, net	139	138
Other accounts receivable	71	70
Other allowance for credit losses	(13)	(14)
Other accounts receivable, net	58	56
Inventories, net
Inventories, net	52	43
Prepaid utility taxes	43	0
Regulatory assets, current	116	130
Other	3	3
Total current assets	437	443
Accumulated depreciation and amortization	1,619	1,551
Property, plant and equipment, net	4,120	3,990
Deferred debits and other assets
Regulatory assets, noncurrent	488	494
Prepaid pension asset	11	18
Total deferred debits and other assets	531	546
Total assets	5,088	4,979
Current Liabilities
Short-term borrowings	37	0
Long-term debt due within one year	3	3
Accrued expenses	42	47
Customer deposits	22	21
Regulatory liabilities, current	15	26
PPA termination obligation	74	87
Total current liabilities	455	474
Long-term debt	1,831	1,754
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	748	734
Regulatory liabilities, noncurrent	147	156
Non-pension postretirement benefit obligations	7	8
Other	69	100
Total deferred credits and other liabilities	971	998
Total Liabilities	3,257	3,226
Commitments and contingencies
Shareholders' equity
Common stock	1,828	1,765
Retained earnings/Undistributed earnings (losses)	3	(12)
Total shareholders’ equity	1,831	1,753
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	5,088	4,979
Atlantic City Electric Company [Member] \| Related Party
Accounts receivable
Customer accounts receivable, net	2	1
Accounts and Other Receivables, Net, Current	2	1
Current Liabilities
Accounts payable	22	26
Other	50	0
Atlantic City Electric Company [Member] \| Nonrelated Party
Deferred debits and other assets
Other	32	34
Current Liabilities
Accounts payable	178	206
Other	$ 12	$ 58

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders Equity (Unaudited) - USD ($) shares in Thousands, $ in Millions	Total	Correcting Adjustment [Member]	Common Stock [Member]	Common Stock [Member] Correcting Adjustment [Member]	Treasury Stock, Common	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Commonwealth Edison Co [Member]	Commonwealth Edison Co [Member] Common Stock [Member]	Commonwealth Edison Co [Member] Retained Earnings [Member]	Commonwealth Edison Co [Member] Other Paid-in-Capital [Member]	PECO Energy Co [Member]	PECO Energy Co [Member] Common Stock [Member]	PECO Energy Co [Member] Retained Earnings [Member]	Baltimore Gas and Electric Company [Member]	Baltimore Gas and Electric Company [Member] Common Stock [Member]	Baltimore Gas and Electric Company [Member] Retained Earnings [Member]	Pepco Holdings LLC [Member]	Pepco Holdings LLC [Member] Retained Earnings [Member]	Pepco Holdings LLC [Member] Membership Interest [Member]	Potomac Electric Power Company [Member]	Potomac Electric Power Company [Member] Common Stock [Member]	Potomac Electric Power Company [Member] Retained Earnings [Member]	Delmarva Power and Light Company [Member]	Delmarva Power and Light Company [Member] Common Stock [Member]	Delmarva Power and Light Company [Member] Retained Earnings [Member]	Atlantic City Electric Company [Member]	Atlantic City Electric Company [Member] Common Stock [Member]	Atlantic City Electric Company [Member] Retained Earnings [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
Beginning Balance at Dec. 31, 2021									$ 12,355	$ 1,588	$ 1,691	$ 9,076	$ 5,112	$ 3,428	$ 1,684	$ 4,570	$ 2,575	$ 1,995				$ 3,475	$ 2,302	$ 1,173	$ 1,777	$ 1,209	$ 568	$ 1,575	$ 1,590	$ (15)
Beginning Balance at Dec. 31, 2021																			$ 10,585	$ (210)	$ 10,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 598					597		1	188		188		206		206	198		198	130	130		46		46	56		56	26		26
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, Per Share, Declared	$ 0.34
Common stock dividends	$ (332)					(332)			(144)		(144)		(100)		(100)	(76)		(76)				(42)		(42)	(41)		(41)	(19)		(19)
Other comprehensive income (loss), net of income taxes	$ 14						14
Distributions to member																			(102)	(102)
Contributions from member									167			167	227	227					704		704	387	387		144	144		173	173
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
Ending Balance at Mar. 31, 2022									12,566	1,588	1,735	9,243	5,445	3,655	1,790	4,692	2,575	2,117				3,866	2,689	1,177	1,936	1,353	583	1,755	1,763	(8)
Ending Balance at Mar. 31, 2022																			11,317	(182)	11,499
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
Beginning Balance at Dec. 31, 2021									12,355	1,588	1,691	9,076	5,112	3,428	1,684	4,570	2,575	1,995				3,475	2,302	1,173	1,777	1,209	568	1,575	1,590	(15)
Beginning Balance at Dec. 31, 2021																			10,585	(210)	10,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,063								415				339			234			230			116			77			37
Other comprehensive income (loss), net of income taxes	$ 26						26
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
Ending Balance at Jun. 30, 2022									12,816	1,588	1,817	9,411	5,478	3,655	1,823	4,840	2,761	2,079				3,678	2,689	989	1,942	1,353	589	1,747	1,763	(16)
Ending Balance at Jun. 30, 2022																			11,124	(375)	11,499
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
Beginning Balance at Mar. 31, 2022									12,566	1,588	1,735	9,243	5,445	3,655	1,790	4,692	2,575	2,117				3,866	2,689	1,177	1,936	1,353	583	1,755	1,763	(8)
Beginning Balance at Mar. 31, 2022																			11,317	(182)	11,499
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 465					465		0	227		227		133		133	37		37	100	100		70		70	21		21	11		11
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, Per Share, Declared	$ 0.34
Common stock dividends	$ (332)					(332)			(145)		(145)		(100)		(100)	(75)		(75)				(258)		(258)	(15)		(15)	(19)		(19)
Other comprehensive income (loss), net of income taxes	$ 12						12
Distributions to member																			(293)	(293)
Contributions from member									168			168				186	186
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
Ending Balance at Jun. 30, 2022									12,816	1,588	1,817	9,411	5,478	3,655	1,823	4,840	2,761	2,079				3,678	2,689	989	1,942	1,353	589	1,747	1,763	(16)
Ending Balance at Jun. 30, 2022																			11,124	(375)	11,499
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								13,364	1,588	2,030	9,746	5,563	3,702	1,861	4,936	2,861	2,075				3,782	2,767	1,015	1,950	1,356	594	1,753	1,765	(12)
Beginning Balance at Dec. 31, 2022																			11,230	(352)	11,582
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 669					669		0	241		241		166		166	200		200	155	155		65		65	60		60	33		33
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, Per Share, Declared	$ 0.36
Common stock dividends	$ (359)					(359)			(187)		(187)		(101)		(101)	(80)		(80)				(48)		(48)	(42)		(42)	(21)		(21)
Other comprehensive income (loss), net of income taxes	$ (1)						(1)
Distributions to member																			(112)	(112)
Contributions from member									186			186	330	330		237	237		405		405	243	243		99	99		63	63
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
Ending Balance at Mar. 31, 2023									13,604	1,588	2,084	9,932	5,958	4,032	1,926	5,293	3,098	2,195				4,042	3,010	1,032	2,067	1,455	612	1,828	1,828	0
Ending Balance at Mar. 31, 2023																			11,678	(309)	11,987
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								13,364	1,588	2,030	9,746	5,563	3,702	1,861	4,936	2,861	2,075				3,782	2,767	1,015	1,950	1,356	594	1,753	1,765	(12)
Beginning Balance at Dec. 31, 2022																			11,230	(352)	11,582
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,012								489				263			241			258			130			85			51
Other comprehensive income (loss), net of income taxes	$ 8						8
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
Ending Balance at Jun. 30, 2023	$ 25,079								13,852	1,588	2,146	10,118	5,954	4,032	1,922	5,256	3,098	2,158				4,039	3,010	1,029	2,074	1,455	619	1,831	1,828	3
Ending Balance at Jun. 30, 2023																			11,681	(306)	11,987
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
Beginning Balance at Mar. 31, 2023									13,604	1,588	2,084	9,932	5,958	4,032	1,926	5,293	3,098	2,195				4,042	3,010	1,032	2,067	1,455	612	1,828	1,828	0
Beginning Balance at Mar. 31, 2023																			11,678	(309)	11,987
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 343					343		0	249		249		97		97	42		42	103	103		64		64	25		25	18		18
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, Per Share, Declared	$ 0.36
Common stock dividends	$ (359)					(359)			(187)		(187)		(101)		(101)	(79)		(79)				(67)		(67)	(18)		(18)	(15)		(15)
Other comprehensive income (loss), net of income taxes	$ 9						9
Distributions to member																			(100)	(100)
Contributions from member									186			186
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
Ending Balance at Jun. 30, 2023	$ 25,079								$ 13,852	$ 1,588	$ 2,146	$ 10,118	$ 5,954	$ 4,032	$ 1,922	$ 5,256	$ 3,098	$ 2,158				$ 4,039	$ 3,010	$ 1,029	$ 2,074	$ 1,455	$ 619	$ 1,831	$ 1,828	$ 3
Ending Balance at Jun. 30, 2023																			$ 11,681	$ (306)	$ 11,987

Significant Accounting Policies

Significant Accounting Policies (All Registrants)	6 Months Ended
Significant Accounting Policies (All Registrants)	Jun. 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 June 30, 2023 and for the three and six months ended June 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 six months ended June 30, 2022. See Note 2 — Discontinued Operations for additional information.

Discontinued Operations (Exelon

Discontinued Operations (Exelon)	6 Months Ended
Discontinued Operations (Exelon)	Jun. 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 six months ended June 30, 2023, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $44 million and $94 million recorded in Other income, net and $3 million and $9 million recorded in Operating and maintenance expense, respectively. For the three months ended June 30, 2022, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $69 million recorded in Other income, net and $11 million recorded in Operating and maintenance expense, respectively. Additionally, for the period from February 1, 2022 to June 30, 2022, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $125 million recorded in Other income, net and $20 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 six months ended June 30, 2023 and the three months ended June 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 six months ended June 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. Six 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 six months ended June 30, 2022. There were no assets or liabilities of discontinued operations included in Exelon's Consolidated Balance Sheet as of June 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 six months ended June 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 six months ended June 30, 2022. Six 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)	6 Months Ended
Regulatory Matters (All Registrants)	Jun. 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 update filing 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 $ 1,545 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 May 30, 2023) Electric 42 10.50% Second quarter of 2024 ACE - New Jersey (g) February 15, 2023 (amended June 2, 2023) Electric 94 10.50% First quarter of 2024 __________ (a) On June 27, 2023, ComEd submitted its MRP rebuttal testimony requesting an increase of the total revenue requirement increase to recover beneficial electrification costs through the MRP initially filed on January 17, 2023. The filing reflects a four-year cumulative MRP for January 1, 2024 to December 31, 2027 and total requested revenue requirement increases of $980 million effective January 1, 2024, $176 million effective January 1, 2025, $187 million effective January 1, 2026, and $202 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 7.43% in 2024, 7.50% in 2025, 7.62% in 2026, and 7.70% 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 rate phase-in to defer approximately $343 million of the $980 million year-over-year increase for 2024 revenue from 2024 to 2026. (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. (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. Based on a settlement agreement filed with the MDPSC on July 21, 2023, Pepco proposed to establish a revenue deferral mechanism that would allow for recovery of 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. The settlement agreement remains subject to approval and Pepco cannot predict if the MDPSC will approve the settlement agreement as filed. (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 intends to put rates into effect on November 17, 2023, subject to refund. 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 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. Discovery remains ongoing. 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 $1.47 billion to $1.54 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. 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, 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. ComEd is determining how 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 June 30, 2023 is $1,079 million. Under CEJA, the costs of procuring CMCs, including carrying costs, are recovered through a rider, the Rider Carbon-Free Resource Adjustment (Rider CFRA). The 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 a supplemental statement to the 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. The ICC approved the proposal on January 19, 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). 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. There were also three pending appeals from the beneficial electrification case, one filed by ComEd and two by the ILAG. 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 plans to consolidate their appeals. 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 June 30, 2023, the $94 million liability for the contract termination fee consists of $74 million and $20 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 six months ended June 30, 2023 and 2022, ACE has respectively paid $43 million and $23 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 covered the period from January 1, 2017 to present. 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. ComEd disagrees with various findings and recommendations in the audit report, as indicated in ComEd's public reply to the report. 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 $779 million primarily due to increases of $252 million in the Electric Distribution Formula Rate Annual Reconciliations regulatory asset, $236 million in the CMC regulatory asset, as discussed in CEJA above, and $145 million in the ZEC regulatory asset. PECO. Regulatory assets increased $87 million primarily due to an increase of $76 million in the Deferred Income Taxes regulatory asset. Regulatory liabilities increased $66 million primarily due to increases of $55 million in the Electric Energy and Natural Gas Costs regulatory liability and $26 million in the Decommissioning the Regulatory Agreement Units regulatory liability. BGE. Regulatory assets increased $78 million primarily due to an increase of $54 million in the Under-Recovered Revenue Decoupling regulatory asset. Pepco . Regulatory liabilities decreased $29 million primarily due to a decrease of $27 million in the Deferred Income Taxes regulatory liability. DPL . Regulatory assets decreased $18 million primarily due to a decrease of $21 million in the Electric Energy and Natural Gas Costs regulatory asset. ACE. Regulatory assets decreased $20 million primarily due to a decrease of $45 million in the Electric Energy Costs regulatory asset as a result of the PPA termination. Capitalized Ratemaking Amounts Not Recognized 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 June 30, 2023 and December 31, 2022. Exelon ComEd (a) BGE (b) PHI Pepco (c) DPL (c) ACE (b) June 30, 2023 $ 63 $ 19 $ 23 $ 21 $ 18 $ 2 $ 1 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 Cus

Revenue from Contracts with Customers (All Registrants)	6 Months Ended
Revenue from Contracts with Customers (All Registrants)	Jun. 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 six months ended June 30, 2023 and 2022. At June 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 Exelon (a) PHI (a) Pepco (a) DPL 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 __________ (a) Revenues recognized in the three and six months ended June 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 June 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 $ 7 $ 7 $ 5 $ 1 $ 1 2024 6 6 5 — 1 2025 5 5 5 — — 2026 5 5 5 — — 2027 and thereafter 75 75 58 9 8 Total $ 98 $ 98 $ 78 $ 10 $ 10 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)	6 Months Ended
Segment Information (All Registrants)	Jun. 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 six months ended June 30, 2023 and 2022 is as follows: Three Months Ended June 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 1,901 $ 719 $ 672 $ 1,274 $ — $ (10) $ 4,556 Natural gas revenues — 109 125 29 — (1) 262 Shared service and other revenues — — — 2 434 (436) — Total operating revenues $ 1,901 $ 828 $ 797 $ 1,305 $ 434 $ (447) $ 4,818 2022 Electric revenues $ 1,425 $ 708 $ 629 $ 1,182 $ — $ (6) $ 3,938 Natural gas revenues — 108 157 37 — (1) 301 Shared service and other revenues — — — 2 384 (386) — Total operating revenues $ 1,425 $ 816 $ 786 $ 1,221 $ 384 $ (393) $ 4,239 Intersegment revenues (c) : 2023 $ 2 $ 2 $ 2 $ 2 $ 432 $ (440) $ — 2022 3 1 3 2 384 (393) — Depreciation and amortization: 2023 $ 350 $ 99 $ 158 $ 243 $ 16 $ — $ 866 2022 328 93 152 240 16 1 830 Operating expenses: 2023 $ 1,478 $ 687 $ 704 $ 1,126 $ 561 $ (442) $ 4,114 2022 1,039 639 717 1,066 460 (378) 3,543 Interest expense, net: 2023 $ 120 $ 48 $ 44 $ 81 $ 134 $ — $ 427 2022 104 43 36 73 101 1 358 Income (loss) from continuing operations before income taxes: 2023 $ 320 $ 99 $ 54 $ 123 $ (174) $ (6) $ 416 2022 293 142 38 101 (62) (1) 511 Income Taxes: 2023 $ 71 $ 2 $ 12 $ 20 $ (32) $ — $ 73 2022 66 9 1 1 (31) — 46 Net income (loss) from continuing operations: 2023 $ 249 $ 97 $ 42 $ 103 $ (142) $ (6) $ 343 2022 227 133 37 100 (31) (1) 465 Capital Expenditures: 2023 $ 645 $ 372 $ 306 $ 461 $ 20 $ — $ 1,804 2022 591 314 275 367 38 — 1,585 __________ (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 expenses 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 $ 642 $ 320 $ 317 $ — $ (5) $ 1,274 Natural gas revenues — 29 — — — 29 Shared service and other revenues — — — 105 (103) 2 Total operating revenues $ 642 $ 349 $ 317 $ 105 $ (108) $ 1,305 2022 Electric revenues $ 581 $ 295 $ 309 $ — $ (3) $ 1,182 Natural gas revenues — 37 — — — 37 Shared service and other revenues — — — 98 (96) 2 Total operating revenues $ 581 $ 332 $ 309 $ 98 $ (99) $ 1,221 Intersegment revenues (c) : 2023 $ 2 $ 2 $ 1 $ 104 $ (107) $ 2 2022 2 2 1 98 (101) 2 Depreciation and amortization: 2023 $ 109 $ 60 $ 68 $ 6 $ — $ 243 2022 105 56 72 7 — 240 Operating expenses: 2023 $ 541 $ 305 $ 280 $ 108 $ (108) $ 1,126 2022 487 296 283 99 (99) 1,066 Interest expense, net: 2023 $ 43 $ 18 $ 17 $ 3 $ — $ 81 2022 38 17 17 1 — 73 Income (loss) before income taxes: 2023 $ 74 $ 30 $ 24 $ (6) $ 1 $ 123 2022 69 23 11 (2) — 101 Income Taxes: 2023 $ 10 $ 5 $ 6 $ (1) $ — $ 20 2022 (1) 2 — — — 1 Net income (loss): 2023 $ 64 $ 25 $ 18 $ (5) $ 1 $ 103 2022 70 21 11 (2) — 100 Capital Expenditures: 2023 $ 219 $ 124 $ 114 $ 4 $ — $ 461 2022 184 91 92 — — 367 _________ (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 expenses 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 June 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 861 $ 444 $ 363 $ 583 $ 267 $ 161 $ 155 Small commercial & industrial 461 132 75 144 41 57 46 Large commercial & industrial 205 64 119 337 254 33 50 Public authorities & electric railroads 13 8 7 15 7 4 4 Other (a) 234 71 103 185 64 61 63 Total electric revenues (b) $ 1,774 $ 719 $ 667 $ 1,264 $ 633 $ 316 $ 318 Natural gas revenues Residential $ — $ 69 $ 71 $ 16 $ — $ 16 $ — Small commercial & industrial — 32 15 7 — 7 — Large commercial & industrial — — 30 1 — 1 — Transportation — 5 — 4 — 4 — Other (c) — 2 5 1 — 1 — Total natural gas revenues (d) $ — $ 108 $ 121 $ 29 $ — $ 29 $ — Total revenues from contracts with customers $ 1,774 $ 827 $ 788 $ 1,293 $ 633 $ 345 $ 318 Other revenues Revenues from alternative revenue programs $ 118 $ (5) $ 4 $ 9 $ 7 $ 3 $ (1) Other electric revenues (e) 9 5 4 3 2 1 — Other natural gas revenues (e) — 1 1 — — — — Total other revenues $ 127 $ 1 $ 9 $ 12 $ 9 $ 4 $ (1) Total revenues for reportable segments $ 1,901 $ 828 $ 797 $ 1,305 $ 642 $ 349 $ 317 Three Months Ended June 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 819 $ 431 $ 334 $ 548 $ 234 $ 155 $ 159 Small commercial & industrial 312 126 70 140 35 51 54 Large commercial & industrial 11 72 129 332 250 30 52 Public authorities & electric railroads 5 7 7 15 8 3 4 Other (a) 234 68 99 164 54 57 55 Total electric revenues (b) $ 1,381 $ 704 $ 639 $ 1,199 $ 581 $ 296 $ 324 Natural gas revenues Residential $ — $ 71 $ 96 $ 17 $ — $ 17 $ — Small commercial & industrial — 29 18 8 — 8 — Large commercial & industrial — — 35 3 — 3 — Transportation — 6 — 3 — 3 — Other (c) — 2 12 6 — 6 — Total natural gas revenues (d) $ — $ 108 $ 161 $ 37 $ — $ 37 $ — Total revenues from contracts with customers $ 1,381 $ 812 $ 800 $ 1,236 $ 581 $ 333 $ 324 Other revenues Revenues from alternative revenue programs $ 35 $ — $ (20) $ (17) $ (1) $ (2) $ (15) Other electric revenues (e) 9 4 4 2 1 1 — Other natural gas revenues (e) — — 2 — — — — Total other revenues $ 44 $ 4 $ (14) $ (15) $ — $ (1) $ (15) Total revenues for reportable segments $ 1,425 $ 816 $ 786 $ 1,221 $ 581 $ 332 $ 309 __________ (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: • $2 million, $3 million at ComEd • $1 million, $1 million at PECO • $1 million, $2 million at BGE • $2 million, $2 million at PHI • $2 million, $2 million at Pepco • $2 million, $2 million at DPL • $1 million, $1 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, less than a $1 million at PECO • $1 million, $1 million at BGE (e) Includes late payment charge revenues. Six Months Ended June 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 3,568 $ 1,514 $ 1,485 $ 2,711 $ — $ (14) $ 9,264 Natural gas revenues — 426 568 126 — (4) 1,116 Shared service and other revenues — — — 4 871 (875) — Total operating revenues $ 3,568 $ 1,940 $ 2,053 $ 2,841 $ 871 $ (893) $ 10,380 2022 Electric revenues $ 3,158 $ 1,449 $ 1,366 $ 2,501 $ — $ (14) $ 8,460 Natural gas revenues — 414 574 120 — (2) 1,106 Shared service and other revenues — — — 5 961 (966) — Total operating revenues $ 3,158 $ 1,863 $ 1,940 $ 2,626 $ 961 $ (982) $ 9,566 Intersegment revenues (c) : 2023 $ 5 $ 4 $ 4 $ 4 $ 867 $ (884) $ — 2022 8 2 10 6 961 (981) 6 Depreciation and amortization: 2023 $ 688 $ 197 $ 325 $ 484 $ 31 $ 2 $ 1,727 2022 649 185 322 459 32 — 1,647 Operating expenses: 2023 $ 2,734 $ 1,590 $ 1,667 $ 2,423 $ 1,046 $ (889) $ 8,571 2022 2,444 1,432 1,636 2,282 1,086 (909) 7,971 Interest expense, net: 2023 $ 237 $ 97 $ 88 $ 157 $ 263 $ (2) $ 840 2022 204 84 71 143 195 — 697 Income (loss) from continuing operations before income taxes: 2023 $ 631 $ 268 $ 306 $ 312 $ (294) $ (5) $ 1,218 2022 534 363 244 238 (125) (45) 1,209 Income taxes: 2023 $ 142 $ 5 $ 65 $ 54 $ (60) $ — $ 206 2022 119 24 10 8 114 (12) 263 Net income (loss) from continuing operations: 2023 $ 489 $ 263 $ 241 $ 258 $ (235) $ (4) $ 1,012 2022 415 339 234 230 (239) (33) 946 Capital expenditures: 2023 $ 1,262 $ 707 $ 656 $ 1,022 $ 38 $ — $ 3,685 2022 1,208 658 578 776 60 — 3,280 Total assets: June 30, 2023 $ 41,672 $ 15,207 $ 13,488 $ 26,241 $ 5,922 $ (4,450) $ 98,080 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 expenses 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 $ 1,351 $ 697 $ 670 $ — $ (7) $ 2,711 Natural gas revenues — 126 — — — 126 Shared service and other revenues — — — 207 (203) 4 Total operating revenues $ 1,351 $ 823 $ 670 $ 207 $ (210) $ 2,841 2022 Electric revenues $ 1,195 $ 643 $ 658 $ — $ 5 $ 2,501 Natural gas revenues — 120 — — — 120 Shared service and other revenues — — — 205 (200) 5 Total operating revenues $ 1,195 $ 763 $ 658 $ 205 $ (195) $ 2,626 Intersegment revenues (c) : 2023 $ 3 $ 3 $ 1 $ 206 $ (209) $ 4 2022 2 3 2 195 (196) 6 Depreciation and amortization: 2023 $ 216 $ 121 $ 135 $ 12 $ — $ 484 2022 213 113 118 15 — 459 Operating expenses: 2023 $ 1,151 $ 693 $ 577 $ 212 $ (210) $ 2,423 2022 1,034 653 593 197 (195) 2,282 Interest expense, net: 2023 $ 81 $ 36 $ 34 $ 6 $ — $ 157 2022 74 33 32 5 (1) 143 Income (loss) before income taxes: 2023 $ 152 $ 102 $ 68 $ (10) $ — $ 312 2022 113 83 38 4 — 238 Income taxes: 2023 $ 22 $ 17 $ 17 $ (2) $ — $ 54 2022 (3) 6 1 4 — 8 Net income (loss): 2023 $ 130 $ 85 $ 51 $ (8) $ — $ 258 2022 116 77 37 — — 230 Capital expenditures: 2023 $ 483 $ 258 $ 275 $ 6 $ — $ 1,022 2022 402 194 179 1 — 776 Total assets: June 30, 2023 $ 10,838 $ 5,823 $ 5,088 $ 4,735 $ (243) $ 26,241 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 expenses 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. Six Months Ended June 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 1,698 $ 963 $ 796 $ 1,221 $ 549 $ 371 $ 301 Small commercial & industrial 823 267 167 304 80 119 105 Large commercial & industrial 290 129 268 714 535 66 113 Public authorities & electric railroads 22 16 14 33 16 8 9 Other (a) 450 139 198 362 120 119 126 Total electric revenues (b) $ 3,283 $ 1,514 $ 1,443 $ 2,634 $ 1,300 $ 683 $ 654 Natural gas revenues Residential $ — $ 292 $ 349 $ 76 $ — $ 76 $ — Small commercial & industrial — 107 56 33 — 33 — Large commercial & industrial — 1 100 2 — 2 — Transportation — 13 — 8 — 8 — Other (c) — 11 24 7 — 7 — Total natural gas revenues (d) $ — $ 424 $ 529 $ 126 $ — $ 126 $ — Total revenues from contracts with customers $ 3,283 $ 1,938 $ 1,972 $ 2,760 $ 1,300 $ 809 $ 654 Other revenues Revenues from alternative revenue programs $ 270 $ (10) $ 70 $ 74 $ 46 $ 12 $ 16 Other electric revenues (e) 15 10 8 7 5 2 — Other natural gas revenues (e) — 2 3 — — — — Total other revenues $ 285 $ 2 $ 81 $ 81 $ 51 $ 14 $ 16 Total revenues for reportable segments $ 3,568 $ 1,940 $ 2,053 $ 2,841 $ 1,351 $ 823 $ 670 Six Months Ended June 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 1,675 $ 918 $ 752 $ 1,200 $ 509 $ 362 $ 329 Small commercial & industrial 736 237 151 281 73 107 101 Large commercial & industrial 165 136 260 655 503 56 96 Public authorities & electric railroads 20 15 14 31 16 7 8 Other (a) 472 130 196 359 100 113 136 Total electric revenues (b) $ 3,068 $ 1,436 $ 1,373 $ 2,526 $ 1,201 $ 645 $ 670 Natural gas revenues Residential $ — $ 289 $ 378 $ 68 $ — $ 68 $ — Small commercial & industrial — 105 63 29 — 29 — Large commercial & industrial — — 100 6 — 6 — Transportation — 14 — 7 — 7 — Other (c) — 5 47 10 — 10 — Total natural gas revenues (d) $ — $ 413 $ 588 $ 120 $ — $ 120 $ — Total revenues from contracts with customers $ 3,068 $ 1,849 $ 1,961 $ 2,646 $ 1,201 $ 765 $ 670 Other revenues Revenues from alternative revenue programs $ 75 $ 6 $ (32) $ (22) $ (7) $ (3) $ (12) Other electric revenues (e) 15 7 8 2 1 1 — Other natural gas revenues (e) — 1 3 — — — — Total other revenues $ 90 $ 14 $ (21) $ (20) $ (6) $ (2) $ (12) Total revenues for reportable segments $ 3,158 $ 1,863 $ 1,940 $ 2,626 $ 1,195 $ 763 $ 658 __________ (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: • $5 million, $8 million at ComEd • $3 million, $2 million at PECO • $2 million, $3 million at BGE • $4 million, $6 million at PHI • $3 million, $2 million at Pepco • $3 million, $3 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, less than a $1 million at PECO • $2 million, $7 million at BGE (e) Includes late payment charge revenues.

Accounts Receivable (All Regist

Accounts Receivable (All Registrants)	6 Months Ended
Accounts Receivable (All Registrants)	Jun. 30, 2023
Credit Loss [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 June 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2023 $ 389 $ 74 $ 130 $ 73 $ 112 $ 49 $ 26 $ 37 Plus: Current period (benefit) provision for expected credit losses (35) (1) (20) (16) 2 4 (3) 1 Less: Write-offs, net of recoveries (a) 31 6 9 7 9 3 2 4 Balance at June 30, 2023 $ 323 $ 67 $ 101 $ 50 $ 105 $ 50 $ 21 $ 34 Three Months Ended June 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2022 $ 389 $ 92 $ 125 $ 59 $ 113 $ 40 $ 24 $ 49 Plus: Current period (benefit) provision for expected credit losses (9) (5) (10) 2 4 5 — (1) Less: Write-offs, net of recoveries 26 6 8 4 8 3 2 3 Balance at June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 Six Months Ended June 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 71 21 18 14 18 13 4 1 Less: Write-offs, net (b)(c) of recoveries (a) 75 13 22 18 22 10 4 8 Balance at June 30, 2023 $ 323 $ 67 $ 101 $ 50 $ 105 $ 50 $ 21 $ 34 Six Months Ended June 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 101 21 21 28 31 16 7 8 Less: Write-offs, net of recoveries 67 13 19 9 26 11 3 12 Balance at June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 __________ (a) Recoveries were not material to the Registrants. (b) For PECO, the change in write-offs is primarily a result of increased disconnection activities. (c) For ACE, the change in write-offs is primarily related to the termination of the moratoriums in New Jersey, which beginning in March 2020, prevented customer disconnections for non-payment. With disconnection activities restarting in January 2022, write-offs of aging accounts receivable increased during the year. The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable. Three Months Ended June 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2023 $ 91 $ 18 $ 11 $ 12 $ 50 $ 28 $ 8 $ 14 Plus: Current period provision (benefit) for expected credit losses 1 1 (2) (2) 4 3 1 — Less: Write-offs, net of recoveries (a) 5 1 1 2 1 — — 1 Balance at June 30, 2023 $ 87 $ 18 $ 8 $ 8 $ 53 $ 31 $ 9 $ 13 Three Months Ended June 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2022 $ 81 $ 20 $ 9 $ 11 $ 41 $ 18 $ 9 $ 14 Plus: Current period provision (benefit) for expected credit losses 2 (2) 2 1 1 2 (1) — Less: Write-offs, net of recoveries 2 — 1 1 — — — — Balance at June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 14 Six Months Ended June 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 15 3 1 2 9 6 2 1 Less: Write-offs, net of recoveries (a) 10 2 2 4 2 — — 2 Balance at June 30, 2023 $ 87 $ 18 $ 8 $ 8 $ 53 $ 31 $ 9 $ 13 Six Months Ended June 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 for expected credit losses 15 2 4 4 5 4 — 1 Less: Write-offs, net of recoveries 6 1 1 2 2 — — 2 Balance at June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 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 June 30, 2023 and December 31, 2022. Unbilled customer revenues (a) Exelon ComEd PECO BGE PHI Pepco DPL ACE June 30, 2023 $ 789 $ 329 $ 144 $ 116 $ 200 $ 96 $ 37 $ 67 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 Six months ended June 30, 2023 $ 1,979 $ 445 $ 546 $ 420 $ 568 $ 371 $ 107 $ 90 Six months ended June 30, 2022 1,911 (a) 456 518 391 (a) 546 342 104 100 __________

Income Taxes (All Registrants)

Income Taxes (All Registrants)	6 Months Ended
Income Taxes (All Registrants)	Jun. 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 June 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 6.5 7.8 (1.2) 6.8 6.2 5.6 6.3 7.1 Plant basis differences (4.8) (0.6) (15.8) 0.1 (1.6) (2.6) (1.1) — Excess deferred tax amortization (7.4) (5.6) (2.4) (5.3) (8.0) (9.9) (9.9) (2.0) 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) (0.3) — (0.4) (0.9) (1.1) (0.4) (0.3) Other 2.8 — 0.4 0.1 (0.3) 0.5 0.9 (0.7) Effective income tax rate 17.5 % 22.2 % 2.0 % 22.2 % 16.3 % 13.5 % 16.7 % 25.0 % Three Months Ended June 30, 2022 (a) Exelon ComEd PECO (c) BGE (c) PHI Pepco (c) DPL ACE (c) 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 (d) (5.4) 7.9 (0.6) 2.1 1.5 (3.4) 7.2 6.7 Plant basis differences (3.3) (0.5) (11.0) (1.3) (1.7) (2.4) (0.7) (1.0) Excess deferred tax amortization (10.5) (5.5) (3.1) (19.0) (19.2) (15.7) (20.0) (24.5) 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 (0.4) (0.3) — (1.5) (0.4) (0.4) (0.4) (0.4) Other (e) 7.7 — — 1.4 (0.1) (0.5) 1.8 (1.6) Effective income tax rate 9.0 % 22.5 % 6.3 % 2.6 % 1.0 % (1.4) % 8.7 % — % __________ (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 PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. For BGE, the lower effective tax rate is primarily due to the Maryland multi-year plan which resulted in the acceleration of certain income tax benefits. For Pepco, the income tax benefit is primarily due to the Maryland and Washington, D.C. multi-year plans which resulted in the acceleration of certain income tax benefits. For ACE, the lower effective tax rate is primarily due to the acceleration of certain income tax benefits due to distribution rate case settlements. (d) For Exelon, the lower state income taxes, net of federal income tax benefit, is primarily related to a one-time impact associated with a state tax benefit of $43 million and indemnification adjustments pursuant to the Tax Matters Agreement of $5 million as a result of the separation. (e) For Exelon, primarily related to indemnification adjustments pursuant to the Tax Matters Agreement of $48 million. Six Months Ended June 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 6.2 7.8 (1.3) 6.4 6.1 5.5 6.3 6.9 Plant basis differences (4.3) (0.4) (15.4) (0.6) (1.7) (2.6) (1.0) (0.6) Excess deferred tax amortization (6.7) (5.6) (2.4) (5.4) (7.4) (9.1) (9.2) (2.0) 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) (0.3) — (0.4) (0.6) (0.8) (0.4) (0.3) Other 1.3 0.1 — 0.3 — 0.5 0.1 0.1 Effective income tax rate 16.9% 22.5% 1.9% 21.2% 17.3% 14.5% 16.7% 25.0% Six Months Ended June 30, 2022 (a) Exelon ComEd PECO (c) BGE (c) PHI Pepco (c) DPL ACE (c) 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 (d) 9.9 7.9 (0.3) 2.3 2.8 (3.8) 6.5 6.7 Plant basis differences (3.5) (0.5) (11.2) (1.0) (1.7) (2.5) (0.7) (1.2) Excess deferred tax amortization (11.0) (5.8) (3.2) (17.8) (18.3) (16.3) (19.5) (22.9) 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 (e) 0.8 (0.3) — (0.6) (0.4) (0.4) (0.3) (0.3) Other (f) 4.7 0.1 0.3 0.3 0.1 (0.7) 0.4 (0.5) Effective income tax rate 21.8% 22.3% 6.6% 4.1% 3.4% (2.7)% 7.2% 2.6% __________ (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 PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. For BGE, the lower effective tax rate is primarily due to the Maryland multi-year plan which resulted in the acceleration of certain income tax benefits. For Pepco, the income tax benefit is primarily due to the Maryland and Washington, D.C. multi-year plans which resulted in the acceleration of certain income tax benefits. For ACE, the lower effective tax rate is primarily due to the acceleration of certain income tax benefits due to distribution rate case settlements. (d) 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. (e) 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. (f) 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 $48 million. Unrecognized Tax Benefits Exelon, PHI and ACE have the following unrecognized tax benefits at June 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 June 30, 2023 $ 148 $ 59 $ 17 December 31, 2022 148 59 17 __________ (a) At June 30, 2023 and December 31, 2022, Exelon recorded 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 June 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 June 30, 2023, Exelon recorded a payable of $17 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 June 30, 2023, Exelon recorded a payable of $8 million and $524 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.

Retirement Benefits (All Regist

Retirement Benefits (All Registrants)	6 Months Ended
Retirement Benefits (All Registrants)	Jun. 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 six months ended June 30, 2023 and 2022. Pension Benefits OPEB Three Months Ended June 30, Three Months Ended June 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 38 $ 58 $ 6 $ 10 Interest cost 144 110 26 19 Expected return on assets (188) (205) (21) (25) Amortization of: Prior service cost (credit) — 1 (3) (5) Actuarial loss (gain) 43 73 (1) 4 Net periodic benefit cost $ 37 $ 37 $ 7 $ 3 Pension Benefits OPEB Six Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 77 $ 119 $ 12 $ 20 Interest cost 289 220 51 38 Expected return on assets (377) (414) (42) (50) Amortization of: Prior service cost (credit) 1 2 (5) (10) Actuarial loss (gain) 84 149 (1) 8 Net periodic benefit cost $ 74 $ 76 $ 15 $ 6 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 June 30, Six Months Ended June 30, Pension and OPEB Costs (Benefit) 2023 2022 2023 2022 Exelon $ 44 $ 40 $ 89 $ 82 ComEd 7 14 13 30 PECO (4) (2) (7) (4) BGE 14 11 28 22 PHI 25 13 49 26 Pepco 9 2 17 4 DPL 5 1 9 2 ACE 3 3 7 6 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 six months ended June 30, 2023 and 2022. Three Months Ended June 30, Six Months Ended June 30, Savings Plan Employer Contributions 2023 2022 2023 2022 Exelon $ 26 $ 23 $ 47 $ 43 ComEd 10 10 19 18 PECO 4 3 7 6 BGE 3 3 5 5 PHI 5 4 8 7 Pepco 1 1 2 2 DPL 1 1 2 2 ACE 1 1 1 1

Derivative Financial Instrument

Derivative Financial Instruments (All Registrants)	6 Months Ended
Derivative Financial Instruments (All Registrants)	Jun. 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 June 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 June 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 June 30, 2023 and December 31, 2022 . June 30, 2023 Derivatives Designated Economic Hedges Total Other deferred debits (noncurrent assets) $ 12 $ 5 $ 17 Total derivative assets 12 5 17 Mark-to-market derivative liabilities (current liabilities) — (7) (7) Total mark-to-market derivative liabilities — (7) (7) Total mark-to-market derivative net assets (liabilities) $ 12 $ (2) $ 10 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. See Note 14 – Changes in Accumulated Other Comprehensive Income (Loss) for additional information. 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 June 30, 2023 and December 31, 2022. June 30, 2023 December 31, 2022 5-year maturity floating-to-fixed swaps $ 260 $ 635 10-year maturity floating-to-fixed swaps 260 635 Total $ 520 $ 1,270 The related AOCI derivative gain for the three and six months ended as of June 30, 2023 was immaterial. 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 June 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 June 30, 2023 and December 31, 2022. Hedging Instrument June 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 six months ended June 30, 2023, Exelon Corporate recognized the following net pre-tax mark-to-market gains (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 six months ended June 30, 2022. Three Months Ended June 30, 2023 Six Months Ended June 30, 2023 Income Statement Location (Loss) Gain (Loss) Gain Electric operating revenues $ (6) $ (5) Interest expense 2 1 Total $ (4) $ (4) 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 June 30, 2023 due to decreasing energy prices. The following table reflects the Registrants' cash collateral held with external counterparties, which is recorded in Other current liabilities on their respective Consolidated Balance Sheets, at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Exelon $ 108 $ 297 ComEd 102 77 PECO (a) — — BGE 1 23 PHI 6 197 Pepco (b) — 26 DPL (b) — 121 ACE 6 50 __________ (a) PECO had less than one million in cash collateral held with external parties at June 30, 2023 and December 31, 2022 . (b) Pepco and DPL had less than one million in cash collateral held with external parties at June 30, 2023.

Debt and Credit Agreements (All

Debt and Credit Agreements (All Registrants)	6 Months Ended
Debt and Credit Agreements (All Registrants)	Jun. 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 June 30, 2023 and December 31, 2022. Outstanding Commercial Average Interest Rate on Commercial Paper Issuer June 30, 2023 December 31, 2022 June 30, 2023 December 31, 2022 Exelon (a) $ 336 $ 1,938 5.23 % 4.77 % ComEd 297 427 5.22 % 4.71 % PECO — 239 — % 4.71 % BGE — 409 — % 4.81 % PHI (b) 37 414 5.32 % 4.78 % Pepco — 299 — % 4.79 % DPL — 115 — % 4.76 % ACE 37 — 5.32 % — % __________ (a) Exelon Corporate had $2 million and $449 million in outstanding commercial paper borrowings at June 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 June 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 6, 2023. 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 six months ended June 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 (a) 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. DPL (b) 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, Pepco entered into a purchase agreement of First Mortgage Bonds of $100 million at 5.35% due on September 13, 2033. The closing date of the issuance is expected to occur in September 2023. (b) 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 June 30, 2023, the Registrants are in compliance with debt covenants.

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities (All Registrants)	6 Months Ended
	Jun. 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. 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 June 30, 2023 and December 31, 2022. The Registrants have no financial liabilities classified as Level 1 or 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. June 30, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Level 2 Level 3 Total Level 2 Level 3 Total Long-Term Debt, including amounts due within one year (a) Exelon $ 40,997 $ 33,514 $ 2,752 $ 36,266 $ 37,074 $ 29,902 $ 2,327 $ 32,229 ComEd 11,482 10,015 — 10,015 10,518 9,006 — 9,006 PECO 5,132 4,426 — 4,426 4,612 3,864 50 3,914 BGE 4,601 4,029 — 4,029 4,207 3,613 — 3,613 PHI 8,550 4,535 2,752 7,287 8,120 4,507 2,277 6,784 Pepco 3,998 2,240 1,469 3,709 3,751 2,229 1,205 3,434 DPL 2,061 1,168 589 1,757 1,938 1,164 458 1,622 ACE 1,834 914 694 1,608 1,757 909 614 1,523 Long-Term Debt to Financing Trusts Exelon $ 390 $ — $ 392 $ 392 $ 390 $ — $ 384 $ 384 ComEd 205 — 207 207 205 — 204 204 PECO 184 — 185 185 184 — 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 June 30, 2023 and December 31, 2022. The Registrants have no financial assets or liabilities measured using the NAV practical expedient: Exelon At June 30, 2023 At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 702 $ — $ — $ 702 $ 664 $ — $ — $ 664 Rabbi trust investments Cash equivalents 66 — — 66 62 — — 62 Mutual funds 50 — — 50 49 — — 49 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 58 42 100 — 58 40 98 Rabbi trust investments subtotal 116 65 42 223 111 65 40 216 Interest rate derivative assets Derivatives designated as hedging instruments — 12 — 12 — 6 — 6 Economic hedges — 5 — 5 — 5 — 5 Interest rate derivative assets subtotal — 17 — 17 — 11 — 11 Total assets 818 82 42 942 775 76 40 891 Liabilities Commodity derivative liabilities — — (133) (133) — — (84) (84) Interest rate derivative liabilities Derivatives designated as hedging instruments — — — — — (4) — (4) Economic hedges — (7) — (7) — (3) — (3) Interest rate derivative liabilities subtotal — (7) — (7) — (7) — (7) Deferred compensation obligation — (74) — (74) — (75) — (75) Total liabilities — (81) (133) (214) — (82) (84) (166) Total net assets (liabilities) $ 818 $ 1 $ (91) $ 728 $ 775 $ (6) $ (44) $ 725 __________ (a) Exelon excludes cash of $225 million and $345 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $108 million and $81 million at June 30, 2023 and December 31, 2022, respectively, and includes long-term restricted cash of $201 million and $117 million at June 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 June 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) $ 484 $ — $ — $ 484 $ 69 $ — $ — $ 69 $ 76 $ — $ — $ 76 Rabbi trust investments Mutual funds — — — — 9 — — 9 9 — — 9 Life insurance contracts — — — — — 16 — 16 — — — — Rabbi trust investments subtotal — — — — 9 16 — 25 9 — — 9 Total assets 484 — — 484 78 16 — 94 85 — — 85 Liabilities Commodity derivative liabilities (b) — — (133) (133) — — — — — — — — Deferred compensation obligation — (7) — (7) — (8) — (8) — (4) — (4) Total liabilities — (7) (133) (140) — (8) — (8) — (4) — (4) Total net assets (liabilities) $ 484 $ (7) $ (133) $ 344 $ 78 $ 8 $ — $ 86 $ 85 $ (4) $ — $ 81 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 $50 million and $42 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $102 million and $77 million at June 30, 2023 and December 31, 2022, respectively. Additionally, ComEd includes long-term restricted cash of $201 million and $117 million at June 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 $22 million and $58 million at June 30, 2023 and December 31, 2022, respectively. BGE excludes cash of $13 million and $43 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $1 million and $1 million at June 30, 2023 and December 31, 2022, respectively. (b) The Level 3 balance consists of the current and noncurrent liability of $24 million and $109 million, respectively, at June 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 June 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) $ 30 $ — $ — $ 30 $ 205 $ — $ — $ 205 Rabbi trust investments Cash equivalents 63 — — 63 59 — — 59 Mutual funds 9 — — 9 11 — — 11 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 20 42 62 — 22 39 61 Rabbi trust investments subtotal 72 27 42 141 70 29 39 138 Total assets 102 27 42 171 275 29 39 343 Liabilities Deferred compensation obligation — (13) — (13) — (14) — (14) Total liabilities — (13) — (13) — (14) — (14) Total net assets $ 102 $ 14 $ 42 $ 158 $ 275 $ 15 $ 39 $ 329 Pepco DPL ACE At June 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 Rabbi trust investments Cash equivalents 62 — — 62 — — — — — — — — Life insurance contracts — 20 42 62 — — — — — — — — Rabbi trust investments subtotal 62 20 42 124 — — — — — — — — Total assets 84 20 42 146 — — — — 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 84 $ 19 $ 42 $ 145 $ — $ — $ — $ — $ 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 $101 million and $165 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $5 million and $3 million at June 30, 2023 and December 31, 2022, respectively. Pepco excludes cash of $15 million and $45 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $5 million and $3 million at June 30, 2023 and December 31, 2022, respectively. DPL excludes cash of $18 million and $31 million at June 30, 2023 and December 31, 2022, respectively. ACE excludes cash of $23 million and $71 million at June 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 six months ended June 30, 2023 and 2022: Exelon ComEd PHI and Pepco Three Months Ended June 30, 2023 Total Commodity Life Insurance Contracts Balance at March 31, 2023 $ (57) $ (98) $ 41 Total realized / unrealized gains (losses) Included in net income (a) 1 — 1 Included in regulatory assets/liabilities (35) (35) (b) — Balance at June 30, 2023 $ (91) $ (133) (c) $ 42 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at June 30, 2023 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Three Months Ended June 30, 2022 Total Commodity Life Insurance Contracts Balance at March 31, 2022 $ (107) $ (144) $ 36 Total realized / unrealized gains (losses) Included in net income (a) 1 — 1 Included in regulatory assets/liabilities 56 56 (b) — Balance at June 30, 2022 $ (50) $ (88) (c) $ 37 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at June 30, 2022 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Six Months Ended June 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 — 2 Included in regulatory assets/liabilities (49) (49) (b) — Balance at June 30, 2023 $ (91) $ (133) (c) $ 42 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at June 30, 2023 $ 2 $ — $ 2 Exelon ComEd PHI and Pepco Six Months Ended June 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) 2 — 2 Included in regulatory assets/liabilities 131 131 (b) — Transfers out of Level 3 (1) — — Balance at June 30, 2022 $ (50) $ (88) (c) $ 37 The amount of total gains included in income attributed to the change in unrealized gain related to assets and liabilities at June 30, 2022 $ 2 $ — $ 2 __________ (a) Classified in Operating and maintenance expense in the Consolidated Statements of Operations and Comprehensive Income. (b) Includes $43 million of decreases in fair value and an increase for realized gains due to settlements of $8 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended June 30, 2023. Includes $59 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 three months ended June 30, 2022. Includes $68 million of decreases in fair value and an increase for realized losses due to settlements of $19 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the six months ended June 30, 2023. Includes $128 million of increases in fair value and an increase 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 six months ended June 30, 2022. (c) The balance consists of a current and noncurrent liability of $24 million and $109 million, respectively, at June 30, 2023. The balance consists of $15 million of current assets and current and noncurrent liability of none and $103 million, respectively at June 30, 2022. Valuation Techniques Used to Determine Fair Value 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. 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 June 30, 2023 Fair Value at December 31, 2022 Valuation Unobservable 2023 Range & Arithmetic Average 2022 Range & Arithmetic Average Commodity derivatives $ (133) $ (84) Discounted Forward power price (a) $25.56 - $75.64 $43.03 $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)	6 Months Ended
Commitments and Contingencies (All Registrants)	Jun. 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 June 30, 2023: Description Exelon PHI Pepco DPL ACE Total commitments $ 513 $ 320 $ 120 $ 89 $ 111 Remaining commitments (a) 44 40 35 3 2 __________ (a) Remaining commitments extend through 2026 and include rate credits, energy efficiency programs and delivery system modernization. Commercial Commitments (All Registrants). The Registrants’ commercial commitments at June 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 $ 21 $ 13 $ 8 $ — $ — $ — $ — Surety bonds (a) 206 172 34 — — — — Financing trust guarantees 378 — — — — — 378 Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 634 $ 185 $ 46 $ 6 $ 5 $ 4 $ 388 ComEd Letters of credit $ 12 $ 9 $ 3 $ — $ — $ — $ — Surety bonds (a) 46 39 7 — — — — Financing trust guarantees 200 — — — — — 200 Total commercial commitments $ 258 $ 48 $ 10 $ — $ — $ — $ 200 PECO Letters of credit $ 1 $ — $ 1 $ — $ — $ — $ — Surety bonds (a) 2 1 1 — — — — Financing trust guarantees 178 — — — — — 178 Total commercial commitments $ 181 $ 1 $ 2 $ — $ — $ — $ 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 $ 77 $ 20 $ — $ — $ — $ — Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 126 $ 77 $ 24 $ 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 $ 3 $ 4 $ — $ — $ — $ — Guaranteed lease residual values (b) 12 — 2 2 2 2 4 Total commercial commitments $ 19 $ 3 $ 6 $ 2 $ 2 $ 2 $ 4 ACE Surety bonds (a) $ 5 $ 3 $ 2 $ — $ — $ — $ — Guaranteed lease residual values (b) 7 — 1 1 1 1 3 Total commercial commitments $ 12 $ 3 $ 3 $ 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 $65 million guaranteed by Exelon and PHI, of which $22 million, $27 million, and $16 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 2024. • 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. At June 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: June 30, 2023 December 31, 2022 Total environmental Portion of total related to Total environmental Portion of total related to Exelon $ 423 $ 334 $ 409 $ 355 ComEd 304 303 325 324 PECO 24 23 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. After completion and approval of the landside FS, now scheduled for December 31, 2023, DOEE will prepare a Proposed Plan for public comment and then issue a Record of Decision (ROD) identifying any further response actions determined to be necessary to address any landside issues. The DOEE will issue a separate ROD for the waterside FS when that work is completed which is now anticipated to be by March 31, 2024. 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. 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. Since that time Exelon and the other PRPs at the site have exchanged letters with the D.C. OAG exploring potential settlement options. Those discussions are ongoing. Exelon, PHI, and Pepco have determined that it is probable that costs for remediation will be incurred and have accrued a liability for management's best estimate of its share of the costs. Pepco 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 entered into negotiations with the Trustees to evaluate possible incorporation of NRD assessment and restoration as part of its remedial activities associated with the Benning site to accelerate the NRD benefits for that portion of the Anacostia River Sediment Project (ARSP) assessment. 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. The D.C. OAG invited Pepco to resolve the threatened enforcement action through a court-approved consent decree, and Pepco is engaged in discussions with the D.C. OAG regarding a potential resolution. Exelon, PHI, and Pepco have determined that a loss associated with this matter is probable and have accrued an estimated liability. Pepco 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 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 provides that the USAO will 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 that had been deferred by the DPA. The SEC’s investigation remains ongoing and Exelon and ComEd have cooperated fully and intend to continue to cooperate fully with the SEC. In the second quarter of 2023, a loss contingency of $46.2 million was recorded in Operating and maintenance expense within Exelon's Consolidated Statements of Operations and Comprehensive Income and in Accrued expenses on the Consolidated Balance Sheets. Subsequent to Exelon announcing the receipt of the 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. The appellate briefing is complete and the parties are awaiting oral argument and/or a decision. • 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. • 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. 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 set a hearing for final approval of the settlement, which will follow a class notice period, for 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 and efforts to resolve the matter remain ongoing. 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. All pending derivative lawsuits were 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. The parties simultaneously filed opening briefs on July 21, 2023 and filed opposition briefs on August 1, 2023. A hearing is set for August 14, 2023. • 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 is being made as part of 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 2024 monthly billing periods, in the line designated as "Transmission Services Charge." The customer refund will not be recovered in rates or charged to customers and ComEd will not seek or accept reimbursement or indemnification from any source other than Exelon. An accrual for the amount of the customer refund has been recorded in Regulatory assets in Exelon’s and ComEd’s Consolidated Balance Sheets as of June 30, 2023. Savings Plan Claim (Exelon). On December 6, 2021, seven current and former employees filed a putative ERISA class action suit in U.S. District Court for the Northern District of Illinois against Exelon, its Board of Directors, the former Board Investment Oversight Committee, the Corporate Investment Committee, individual defendants, and other unnamed fiduciaries of the Exelon Corporation Employee Savings Plan (Plan). The complaint alleges that the defendants violated their fiduciary duties under the Plan by including certain investment options that allegedly were more expensive than and underperformed similar passively-managed or other funds available in the marketplace and permitting a third-party administrative service provider/recordkeeper and an investment adviser to charge excessive fees for the services provided. The plaintiffs seek declaratory, equitable and monetary relief on behalf of the Plan and participants. On February 16, 2022, the court granted the parties' stipulated dismissal of the individual named defendants without prejudice. The remaining defendants filed a motion to dismiss the complaint on February 25, 2022. On March 4, 2022, the Chamber of Commerce filed a brief of amicus curiae in support of the defendants' motion to dismiss. On September 22, 2022, the court granted Exelon’s motion to dismiss without prejudice. The court granted plaintiffs leave until October 31, 2022 to file an amended complaint, which was later extended to November 30, 2022. Plaintiffs filed their amended complaint on November 30, 2022. Defendants filed their motion to dismiss the amended complaint on January 20, 2023. Briefing on the motion to dismiss is now complete and the parties await a ruling. No loss contingencies have been reflected in Exelon’s consolidated financial statements with respect to this matter, as such contingencies are neither probable nor reasonably estimable at this time. General (All Registrants). The Registrants are involved in various other litigation matters that are being defended and handled in the ordinary course of business. The Registrants are also from time to time subject to audits and investigations by the FERC and other regulators. The assessment of whether a loss is probable or reasonably possible, and whether the loss or a range of loss is estimable, often involves a series of complex judgments about future events. The Registrants maintain accruals for such losses that are probable of being incurred and subject to reasonable estimation. Management is sometimes unable to estimate an amount or range of reasonably possible loss, particularly where (1) the damages sought are indeterminate, (2) the proceedings are in the early stages, or (3) the matters involve novel or unsettled legal theories. In such cases, there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including a possible eventual loss.

Shareholders' Equity (Exelon)

Shareholders' Equity (Exelon)	6 Months Ended
Shareholders' Equity (Exelon)	Jun. 30, 2023
Equity [Abstract]
Shareholders' Equity (Exelon)	Shareholders' Equity (Exelon) At-the-Market (ATM) 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 June 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)	6 Months Ended
Changes in Accumulated Other Comprehensive Income (Exelon)	Jun. 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: Three Months Ended June 30, 2023 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total 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) Three Months Ended June 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total 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) Six Months Ended June 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 15 (13) — 2 Amounts reclassified from AOCI — 6 — 6 Net current-period OCI 15 (7) — 8 Balance at June 30, 2023 $ 17 $ (647) $ — $ (630) Six Months Ended June 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 OCI before reclassifications — 2 — 2 Amounts reclassified from AOCI — 24 — 24 Net current-period OCI — 26 — 26 Balance at June 30, 2022 $ — $ (701) $ — $ (701) __________ (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 June 30, Six Months Ended June 30, 2023 2022 2023 2022 Pension and non-pension postretirement benefit plans: Actuarial loss reclassified to periodic benefit cost $ (1) $ (3) $ (2) $ (8) Pension and non-pension postretirement benefit plans valuation adjustment 1 (1) 4 — Unrealized gain on cash flow hedges (3) — (4) —

Supplemental Financial Informat

Supplemental Financial Information (All Registrants)	6 Months Ended
Supplemental Financial Information (All Registrants)	Jun. 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 June 30, 2023 Utility taxes (a) $ 201 $ 71 $ 38 $ 22 $ 70 $ 63 $ 6 $ 1 Property 96 8 4 49 35 24 10 1 Payroll 31 7 4 5 7 2 1 1 Three Months Ended June 30, 2022 Utility taxes (a) $ 203 $ 71 $ 39 $ 20 $ 73 $ 67 $ 5 $ 1 Property 94 10 4 46 33 23 10 — Payroll 28 7 5 4 7 1 1 1 Six Months Ended June 30, 2023 Utility taxes (a) $ 421 $ 146 $ 78 $ 50 $ 147 $ 131 $ 14 $ 2 Property 196 18 8 100 70 48 21 1 Payroll 63 14 9 9 14 4 2 2 Six Months Ended June 30, 2022 Utility taxes (a) $ 424 $ 149 $ 77 $ 47 $ 151 $ 137 $ 12 $ 2 Property 188 20 9 92 67 46 20 1 Payroll 64 13 8 9 14 3 2 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 June 30, 2023 AFUDC — Equity $ 34 $ 7 $ 6 $ 4 $ 17 $ 13 $ 2 $ 2 Non-service net periodic benefit credit (1) — — — — — — — Three Months Ended June 30, 2022 AFUDC — Equity $ 38 $ 9 $ 8 $ 6 $ 15 $ 11 $ 2 $ 2 Non-service net periodic benefit cost 16 — — — — — — — Six Months Ended June 30, 2023 AFUDC — Equity $ 71 $ 17 $ 12 $ 7 $ 35 $ 27 $ 4 $ 4 Non-service net periodic benefit credit (2) — — — — — — — Six Months Ended June 30, 2022 AFUDC — Equity $ 74 $ 17 $ 15 $ 12 $ 30 $ 22 $ 4 $ 4 Non-service net periodic benefit cost 33 — — — — — — — 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 Six Months Ended June 30, 2023 Property, plant, and equipment (b) $ 1,370 $ 540 $ 190 $ 249 $ 364 $ 152 $ 104 $ 96 Amortization of regulatory assets (b) 352 148 7 76 120 64 17 39 Amortization of intangible assets, net (b) 4 — — — — — — — ARO accretion (e) 1 — — — — — — — Total depreciation and amortization $ 1,727 $ 688 $ 197 $ 325 $ 484 $ 216 $ 121 $ 135 Six Months Ended June 30, 2022 Property, plant, and equipment (b) $ 1,376 $ 511 $ 177 $ 235 $ 335 $ 145 $ 92 $ 83 Amortization of regulatory assets (b) 357 138 8 87 124 68 21 35 Amortization of intangible assets, net (b) 8 — — — — — — — Amortization of energy contract assets and liabilities (c) 3 — — — — — — — Nuclear fuel (d) 66 — — — — — — — ARO accretion (e) 44 — — — — — — — Total depreciation, amortization, and accretion $ 1,854 $ 649 $ 185 $ 322 $ 459 $ 213 $ 113 $ 118 __________ (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 Six Months Ended June 30, 2023 Pension and OPEB costs (benefit) $ 89 $ 13 $ (7) $ 28 $ 49 $ 17 $ 9 $ 7 Allowance for credit losses 46 1 19 4 22 13 3 6 True-up adjustments to decoupling mechanisms and formula rates (b) (410) (270) 10 (70) (80) (46) (15) (19) Long-term incentive plan 13 — — — — — — — Amortization of operating ROU asset 19 1 — 2 14 2 4 2 Change in environmental liabilities 37 — — — 37 37 — — AFUDC — Equity (71) (17) (12) (7) (35) (27) (4) (4) Six Months Ended June 30, 2022 Pension and OPEB costs (benefit) $ 86 $ 30 $ (4) $ 22 $ 26 $ 4 $ 2 $ 6 Allowance for credit losses 96 29 21 18 29 16 6 7 Other decommissioning-related activity 36 — — — — — — — Energy-related options 60 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (27) (75) (6) 32 22 7 3 12 Long-term incentive plan 40 — — — — — — — Amortization of operating ROU asset 38 1 — 14 14 4 4 2 AFUDC — Equity (74) (17) (15) (12) (30) (22) (4) (4) __________ (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. Exelon ComEd PECO BGE PHI Pepco DPL ACE June 30, 2023 Cash and cash equivalents $ 399 $ 74 $ 82 $ 89 $ 110 $ 16 $ 18 $ 24 Restricted cash and cash equivalents 435 361 9 1 26 26 — — Restricted cash included in other deferred debits and other assets 201 201 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,035 $ 636 $ 91 $ 90 $ 136 $ 42 $ 18 $ 24 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 June 30, 2022 Cash and cash equivalents $ 816 $ 120 $ 23 $ 354 $ 278 $ 14 $ 26 $ 233 Restricted cash and cash equivalents 961 384 9 205 341 117 223 — Restricted cash included in other deferred debits and other assets 59 59 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,836 $ 563 $ 32 $ 559 $ 619 $ 131 $ 249 $ 233 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 June 30, 2023 Compensation-related accruals (a) $ 467 $ 121 $ 65 $ 59 $ 88 $ 26 $ 17 $ 14 Taxes accrued 179 101 40 33 75 52 13 8 Interest accrued 423 151 48 43 69 37 12 15 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)	6 Months Ended
Related Party Transactions (All Registrants)	Jun. 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. Six Months Ended June 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 June 30, Six Months Ended June 30, Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 2023 2022 2023 2022 Exelon BSC $ 165 $ 139 $ 340 $ 344 PHISCO 25 21 49 40 ComEd BSC $ 88 $ 80 $ 171 $ 165 78 67 159 152 PECO BSC 54 47 105 96 30 20 60 56 BGE BSC 54 51 108 102 22 22 46 60 PHI BSC 43 46 85 96 35 30 75 76 PHISCO — — — — 25 21 49 40 Pepco BSC 28 27 55 56 14 11 28 28 PHISCO 30 29 60 58 10 8 21 16 DPL BSC 18 17 35 35 10 9 20 23 PHISCO 25 25 49 49 8 7 15 13 ACE BSC 15 14 29 29 12 10 26 25 PHISCO 22 22 44 43 7 6 13 11 Current Receivables from/Payables to affiliates The following tables present current Receivables from affiliates and current Payables to affiliates: June 30, 2023 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 62 $ — $ 9 $ 71 PECO $ — — — — — 33 — 3 36 BGE — — — — — 30 — 2 32 PHI — — — — — — 7 — 11 18 Pepco — — — — — 17 15 — 32 DPL — — — — — 11 11 1 23 ACE — — — — — 10 11 1 22 Other 3 1 — — — 2 — — 6 Total $ 3 $ 1 $ — $ — $ — $ 2 $ 170 $ 37 $ 27 $ 240 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: June 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)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 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 June 30, 2023 and for the three and six months ended June 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 six months ended June 30, 2022. See Note 2 — Discontinued Operations for additional information.

Discontinued Operations (Tables

Discontinued Operations (Tables) - Exelon Generation Co L L C [Member]	6 Months Ended
	Jun. 30, 2023
Discontinued Operations - Income Statement
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 six months ended June 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. Six 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 six months ended June 30, 2022.
Discontinued Operations - Cash Flows [Table Text Block]	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 six months ended June 30, 2022. Six 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)	6 Months Ended
Regulatory Matters (Tables)	Jun. 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 update filing 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 $ 1,545 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 May 30, 2023) Electric 42 10.50% Second quarter of 2024 ACE - New Jersey (g) February 15, 2023 (amended June 2, 2023) Electric 94 10.50% First quarter of 2024 __________ (a) On June 27, 2023, ComEd submitted its MRP rebuttal testimony requesting an increase of the total revenue requirement increase to recover beneficial electrification costs through the MRP initially filed on January 17, 2023. The filing reflects a four-year cumulative MRP for January 1, 2024 to December 31, 2027 and total requested revenue requirement increases of $980 million effective January 1, 2024, $176 million effective January 1, 2025, $187 million effective January 1, 2026, and $202 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 7.43% in 2024, 7.50% in 2025, 7.62% in 2026, and 7.70% 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 rate phase-in to defer approximately $343 million of the $980 million year-over-year increase for 2024 revenue from 2024 to 2026. (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. (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. Based on a settlement agreement filed with the MDPSC on July 21, 2023, Pepco proposed to establish a revenue deferral mechanism that would allow for recovery of 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. The settlement agreement remains subject to approval and Pepco cannot predict if the MDPSC will approve the settlement agreement as filed. (f) The rates went into effect on July 15, 2023, subject to refund.
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 June 30, 2023 and December 31, 2022. Exelon ComEd (a) BGE (b) PHI Pepco (c) DPL (c) ACE (b) June 30, 2023 $ 63 $ 19 $ 23 $ 21 $ 18 $ 2 $ 1 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)	6 Months Ended
Revenue from Contracts with Customers (Tables)	Jun. 30, 2023
Contract with Customers [Line Items]
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 June 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 $ 7 $ 7 $ 5 $ 1 $ 1 2024 6 6 5 — 1 2025 5 5 5 — — 2026 5 5 5 — — 2027 and thereafter 75 75 58 9 8 Total $ 98 $ 98 $ 78 $ 10 $ 10
Contract Liabilities
Contract with Customers [Line Items]
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	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 six months ended June 30, 2023 and 2022. At June 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 Exelon (a) PHI (a) Pepco (a) DPL 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 __________ (a) Revenues recognized in the three and six months ended June 30, 2023 and 2022, were included in the contract liabilities at December 31, 2022 and 2021, respectively.

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
Segment Information (Tables)	Jun. 30, 2023
Segment Tables [Line Items]
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 six months ended June 30, 2023 and 2022 is as follows: Three Months Ended June 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 1,901 $ 719 $ 672 $ 1,274 $ — $ (10) $ 4,556 Natural gas revenues — 109 125 29 — (1) 262 Shared service and other revenues — — — 2 434 (436) — Total operating revenues $ 1,901 $ 828 $ 797 $ 1,305 $ 434 $ (447) $ 4,818 2022 Electric revenues $ 1,425 $ 708 $ 629 $ 1,182 $ — $ (6) $ 3,938 Natural gas revenues — 108 157 37 — (1) 301 Shared service and other revenues — — — 2 384 (386) — Total operating revenues $ 1,425 $ 816 $ 786 $ 1,221 $ 384 $ (393) $ 4,239 Intersegment revenues (c) : 2023 $ 2 $ 2 $ 2 $ 2 $ 432 $ (440) $ — 2022 3 1 3 2 384 (393) — Depreciation and amortization: 2023 $ 350 $ 99 $ 158 $ 243 $ 16 $ — $ 866 2022 328 93 152 240 16 1 830 Operating expenses: 2023 $ 1,478 $ 687 $ 704 $ 1,126 $ 561 $ (442) $ 4,114 2022 1,039 639 717 1,066 460 (378) 3,543 Interest expense, net: 2023 $ 120 $ 48 $ 44 $ 81 $ 134 $ — $ 427 2022 104 43 36 73 101 1 358 Income (loss) from continuing operations before income taxes: 2023 $ 320 $ 99 $ 54 $ 123 $ (174) $ (6) $ 416 2022 293 142 38 101 (62) (1) 511 Income Taxes: 2023 $ 71 $ 2 $ 12 $ 20 $ (32) $ — $ 73 2022 66 9 1 1 (31) — 46 Net income (loss) from continuing operations: 2023 $ 249 $ 97 $ 42 $ 103 $ (142) $ (6) $ 343 2022 227 133 37 100 (31) (1) 465 Capital Expenditures: 2023 $ 645 $ 372 $ 306 $ 461 $ 20 $ — $ 1,804 2022 591 314 275 367 38 — 1,585 __________ (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 expenses 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 $ 642 $ 320 $ 317 $ — $ (5) $ 1,274 Natural gas revenues — 29 — — — 29 Shared service and other revenues — — — 105 (103) 2 Total operating revenues $ 642 $ 349 $ 317 $ 105 $ (108) $ 1,305 2022 Electric revenues $ 581 $ 295 $ 309 $ — $ (3) $ 1,182 Natural gas revenues — 37 — — — 37 Shared service and other revenues — — — 98 (96) 2 Total operating revenues $ 581 $ 332 $ 309 $ 98 $ (99) $ 1,221 Intersegment revenues (c) : 2023 $ 2 $ 2 $ 1 $ 104 $ (107) $ 2 2022 2 2 1 98 (101) 2 Depreciation and amortization: 2023 $ 109 $ 60 $ 68 $ 6 $ — $ 243 2022 105 56 72 7 — 240 Operating expenses: 2023 $ 541 $ 305 $ 280 $ 108 $ (108) $ 1,126 2022 487 296 283 99 (99) 1,066 Interest expense, net: 2023 $ 43 $ 18 $ 17 $ 3 $ — $ 81 2022 38 17 17 1 — 73 Income (loss) before income taxes: 2023 $ 74 $ 30 $ 24 $ (6) $ 1 $ 123 2022 69 23 11 (2) — 101 Income Taxes: 2023 $ 10 $ 5 $ 6 $ (1) $ — $ 20 2022 (1) 2 — — — 1 Net income (loss): 2023 $ 64 $ 25 $ 18 $ (5) $ 1 $ 103 2022 70 21 11 (2) — 100 Capital Expenditures: 2023 $ 219 $ 124 $ 114 $ 4 $ — $ 461 2022 184 91 92 — — 367 _________ (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 expenses 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 June 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 861 $ 444 $ 363 $ 583 $ 267 $ 161 $ 155 Small commercial & industrial 461 132 75 144 41 57 46 Large commercial & industrial 205 64 119 337 254 33 50 Public authorities & electric railroads 13 8 7 15 7 4 4 Other (a) 234 71 103 185 64 61 63 Total electric revenues (b) $ 1,774 $ 719 $ 667 $ 1,264 $ 633 $ 316 $ 318 Natural gas revenues Residential $ — $ 69 $ 71 $ 16 $ — $ 16 $ — Small commercial & industrial — 32 15 7 — 7 — Large commercial & industrial — — 30 1 — 1 — Transportation — 5 — 4 — 4 — Other (c) — 2 5 1 — 1 — Total natural gas revenues (d) $ — $ 108 $ 121 $ 29 $ — $ 29 $ — Total revenues from contracts with customers $ 1,774 $ 827 $ 788 $ 1,293 $ 633 $ 345 $ 318 Other revenues Revenues from alternative revenue programs $ 118 $ (5) $ 4 $ 9 $ 7 $ 3 $ (1) Other electric revenues (e) 9 5 4 3 2 1 — Other natural gas revenues (e) — 1 1 — — — — Total other revenues $ 127 $ 1 $ 9 $ 12 $ 9 $ 4 $ (1) Total revenues for reportable segments $ 1,901 $ 828 $ 797 $ 1,305 $ 642 $ 349 $ 317 Three Months Ended June 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 819 $ 431 $ 334 $ 548 $ 234 $ 155 $ 159 Small commercial & industrial 312 126 70 140 35 51 54 Large commercial & industrial 11 72 129 332 250 30 52 Public authorities & electric railroads 5 7 7 15 8 3 4 Other (a) 234 68 99 164 54 57 55 Total electric revenues (b) $ 1,381 $ 704 $ 639 $ 1,199 $ 581 $ 296 $ 324 Natural gas revenues Residential $ — $ 71 $ 96 $ 17 $ — $ 17 $ — Small commercial & industrial — 29 18 8 — 8 — Large commercial & industrial — — 35 3 — 3 — Transportation — 6 — 3 — 3 — Other (c) — 2 12 6 — 6 — Total natural gas revenues (d) $ — $ 108 $ 161 $ 37 $ — $ 37 $ — Total revenues from contracts with customers $ 1,381 $ 812 $ 800 $ 1,236 $ 581 $ 333 $ 324 Other revenues Revenues from alternative revenue programs $ 35 $ — $ (20) $ (17) $ (1) $ (2) $ (15) Other electric revenues (e) 9 4 4 2 1 1 — Other natural gas revenues (e) — — 2 — — — — Total other revenues $ 44 $ 4 $ (14) $ (15) $ — $ (1) $ (15) Total revenues for reportable segments $ 1,425 $ 816 $ 786 $ 1,221 $ 581 $ 332 $ 309 __________ (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: • $2 million, $3 million at ComEd • $1 million, $1 million at PECO • $1 million, $2 million at BGE • $2 million, $2 million at PHI • $2 million, $2 million at Pepco • $2 million, $2 million at DPL • $1 million, $1 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, less than a $1 million at PECO • $1 million, $1 million at BGE (e) Includes late payment charge revenues. Six Months Ended June 30, 2023 and 2022 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2023 Electric revenues $ 3,568 $ 1,514 $ 1,485 $ 2,711 $ — $ (14) $ 9,264 Natural gas revenues — 426 568 126 — (4) 1,116 Shared service and other revenues — — — 4 871 (875) — Total operating revenues $ 3,568 $ 1,940 $ 2,053 $ 2,841 $ 871 $ (893) $ 10,380 2022 Electric revenues $ 3,158 $ 1,449 $ 1,366 $ 2,501 $ — $ (14) $ 8,460 Natural gas revenues — 414 574 120 — (2) 1,106 Shared service and other revenues — — — 5 961 (966) — Total operating revenues $ 3,158 $ 1,863 $ 1,940 $ 2,626 $ 961 $ (982) $ 9,566 Intersegment revenues (c) : 2023 $ 5 $ 4 $ 4 $ 4 $ 867 $ (884) $ — 2022 8 2 10 6 961 (981) 6 Depreciation and amortization: 2023 $ 688 $ 197 $ 325 $ 484 $ 31 $ 2 $ 1,727 2022 649 185 322 459 32 — 1,647 Operating expenses: 2023 $ 2,734 $ 1,590 $ 1,667 $ 2,423 $ 1,046 $ (889) $ 8,571 2022 2,444 1,432 1,636 2,282 1,086 (909) 7,971 Interest expense, net: 2023 $ 237 $ 97 $ 88 $ 157 $ 263 $ (2) $ 840 2022 204 84 71 143 195 — 697 Income (loss) from continuing operations before income taxes: 2023 $ 631 $ 268 $ 306 $ 312 $ (294) $ (5) $ 1,218 2022 534 363 244 238 (125) (45) 1,209 Income taxes: 2023 $ 142 $ 5 $ 65 $ 54 $ (60) $ — $ 206 2022 119 24 10 8 114 (12) 263 Net income (loss) from continuing operations: 2023 $ 489 $ 263 $ 241 $ 258 $ (235) $ (4) $ 1,012 2022 415 339 234 230 (239) (33) 946 Capital expenditures: 2023 $ 1,262 $ 707 $ 656 $ 1,022 $ 38 $ — $ 3,685 2022 1,208 658 578 776 60 — 3,280 Total assets: June 30, 2023 $ 41,672 $ 15,207 $ 13,488 $ 26,241 $ 5,922 $ (4,450) $ 98,080 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 expenses 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 $ 1,351 $ 697 $ 670 $ — $ (7) $ 2,711 Natural gas revenues — 126 — — — 126 Shared service and other revenues — — — 207 (203) 4 Total operating revenues $ 1,351 $ 823 $ 670 $ 207 $ (210) $ 2,841 2022 Electric revenues $ 1,195 $ 643 $ 658 $ — $ 5 $ 2,501 Natural gas revenues — 120 — — — 120 Shared service and other revenues — — — 205 (200) 5 Total operating revenues $ 1,195 $ 763 $ 658 $ 205 $ (195) $ 2,626 Intersegment revenues (c) : 2023 $ 3 $ 3 $ 1 $ 206 $ (209) $ 4 2022 2 3 2 195 (196) 6 Depreciation and amortization: 2023 $ 216 $ 121 $ 135 $ 12 $ — $ 484 2022 213 113 118 15 — 459 Operating expenses: 2023 $ 1,151 $ 693 $ 577 $ 212 $ (210) $ 2,423 2022 1,034 653 593 197 (195) 2,282 Interest expense, net: 2023 $ 81 $ 36 $ 34 $ 6 $ — $ 157 2022 74 33 32 5 (1) 143 Income (loss) before income taxes: 2023 $ 152 $ 102 $ 68 $ (10) $ — $ 312 2022 113 83 38 4 — 238 Income taxes: 2023 $ 22 $ 17 $ 17 $ (2) $ — $ 54 2022 (3) 6 1 4 — 8 Net income (loss): 2023 $ 130 $ 85 $ 51 $ (8) $ — $ 258 2022 116 77 37 — — 230 Capital expenditures: 2023 $ 483 $ 258 $ 275 $ 6 $ — $ 1,022 2022 402 194 179 1 — 776 Total assets: June 30, 2023 $ 10,838 $ 5,823 $ 5,088 $ 4,735 $ (243) $ 26,241 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 expenses 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. Six Months Ended June 30, 2023 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 1,698 $ 963 $ 796 $ 1,221 $ 549 $ 371 $ 301 Small commercial & industrial 823 267 167 304 80 119 105 Large commercial & industrial 290 129 268 714 535 66 113 Public authorities & electric railroads 22 16 14 33 16 8 9 Other (a) 450 139 198 362 120 119 126 Total electric revenues (b) $ 3,283 $ 1,514 $ 1,443 $ 2,634 $ 1,300 $ 683 $ 654 Natural gas revenues Residential $ — $ 292 $ 349 $ 76 $ — $ 76 $ — Small commercial & industrial — 107 56 33 — 33 — Large commercial & industrial — 1 100 2 — 2 — Transportation — 13 — 8 — 8 — Other (c) — 11 24 7 — 7 — Total natural gas revenues (d) $ — $ 424 $ 529 $ 126 $ — $ 126 $ — Total revenues from contracts with customers $ 3,283 $ 1,938 $ 1,972 $ 2,760 $ 1,300 $ 809 $ 654 Other revenues Revenues from alternative revenue programs $ 270 $ (10) $ 70 $ 74 $ 46 $ 12 $ 16 Other electric revenues (e) 15 10 8 7 5 2 — Other natural gas revenues (e) — 2 3 — — — — Total other revenues $ 285 $ 2 $ 81 $ 81 $ 51 $ 14 $ 16 Total revenues for reportable segments $ 3,568 $ 1,940 $ 2,053 $ 2,841 $ 1,351 $ 823 $ 670 Six Months Ended June 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 1,675 $ 918 $ 752 $ 1,200 $ 509 $ 362 $ 329 Small commercial & industrial 736 237 151 281 73 107 101 Large commercial & industrial 165 136 260 655 503 56 96 Public authorities & electric railroads 20 15 14 31 16 7 8 Other (a) 472 130 196 359 100 113 136 Total electric revenues (b) $ 3,068 $ 1,436 $ 1,373 $ 2,526 $ 1,201 $ 645 $ 670 Natural gas revenues Residential $ — $ 289 $ 378 $ 68 $ — $ 68 $ — Small commercial & industrial — 105 63 29 — 29 — Large commercial & industrial — — 100 6 — 6 — Transportation — 14 — 7 — 7 — Other (c) — 5 47 10 — 10 — Total natural gas revenues (d) $ — $ 413 $ 588 $ 120 $ — $ 120 $ — Total revenues from contracts with customers $ 3,068 $ 1,849 $ 1,961 $ 2,646 $ 1,201 $ 765 $ 670 Other revenues Revenues from alternative revenue programs $ 75 $ 6 $ (32) $ (22) $ (7) $ (3) $ (12) Other electric revenues (e) 15 7 8 2 1 1 — Other natural gas revenues (e) — 1 3 — — — — Total other revenues $ 90 $ 14 $ (21) $ (20) $ (6) $ (2) $ (12) Total revenues for reportable segments $ 3,158 $ 1,863 $ 1,940 $ 2,626 $ 1,195 $ 763 $ 658 __________ (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: • $5 million, $8 million at ComEd • $3 million, $2 million at PECO • $2 million, $3 million at BGE • $4 million, $6 million at PHI • $3 million, $2 million at Pepco • $3 million, $3 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, less than a $1 million at PECO • $2 million, $7 million at BGE (e) Includes late payment charge revenues.

Accounts Receivable (Tables)

Accounts Receivable (Tables)	6 Months Ended
Accounts Receivable (Tables)	Jun. 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 June 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2023 $ 389 $ 74 $ 130 $ 73 $ 112 $ 49 $ 26 $ 37 Plus: Current period (benefit) provision for expected credit losses (35) (1) (20) (16) 2 4 (3) 1 Less: Write-offs, net of recoveries (a) 31 6 9 7 9 3 2 4 Balance at June 30, 2023 $ 323 $ 67 $ 101 $ 50 $ 105 $ 50 $ 21 $ 34 Three Months Ended June 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2022 $ 389 $ 92 $ 125 $ 59 $ 113 $ 40 $ 24 $ 49 Plus: Current period (benefit) provision for expected credit losses (9) (5) (10) 2 4 5 — (1) Less: Write-offs, net of recoveries 26 6 8 4 8 3 2 3 Balance at June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 Six Months Ended June 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 71 21 18 14 18 13 4 1 Less: Write-offs, net (b)(c) of recoveries (a) 75 13 22 18 22 10 4 8 Balance at June 30, 2023 $ 323 $ 67 $ 101 $ 50 $ 105 $ 50 $ 21 $ 34 Six Months Ended June 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 101 21 21 28 31 16 7 8 Less: Write-offs, net of recoveries 67 13 19 9 26 11 3 12 Balance at June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 __________ (a) Recoveries were not material to the Registrants. (b) For PECO, the change in write-offs is primarily a result of increased disconnection activities. (c) For ACE, the change in write-offs is primarily related to the termination of the moratoriums in New Jersey, which beginning in March 2020, prevented customer disconnections for non-payment. With disconnection activities restarting in January 2022, write-offs of aging accounts receivable increased during the year. The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable. Three Months Ended June 30, 2023 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2023 $ 91 $ 18 $ 11 $ 12 $ 50 $ 28 $ 8 $ 14 Plus: Current period provision (benefit) for expected credit losses 1 1 (2) (2) 4 3 1 — Less: Write-offs, net of recoveries (a) 5 1 1 2 1 — — 1 Balance at June 30, 2023 $ 87 $ 18 $ 8 $ 8 $ 53 $ 31 $ 9 $ 13 Three Months Ended June 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance at March 31, 2022 $ 81 $ 20 $ 9 $ 11 $ 41 $ 18 $ 9 $ 14 Plus: Current period provision (benefit) for expected credit losses 2 (2) 2 1 1 2 (1) — Less: Write-offs, net of recoveries 2 — 1 1 — — — — Balance at June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 14 Six Months Ended June 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 15 3 1 2 9 6 2 1 Less: Write-offs, net of recoveries (a) 10 2 2 4 2 — — 2 Balance at June 30, 2023 $ 87 $ 18 $ 8 $ 8 $ 53 $ 31 $ 9 $ 13 Six Months Ended June 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 for expected credit losses 15 2 4 4 5 4 — 1 Less: Write-offs, net of recoveries 6 1 1 2 2 — — 2 Balance at June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 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 June 30, 2023 and December 31, 2022. Unbilled customer revenues (a) Exelon ComEd PECO BGE PHI Pepco DPL ACE June 30, 2023 $ 789 $ 329 $ 144 $ 116 $ 200 $ 96 $ 37 $ 67 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 Six months ended June 30, 2023 $ 1,979 $ 445 $ 546 $ 420 $ 568 $ 371 $ 107 $ 90 Six months ended June 30, 2022 1,911 (a) 456 518 391 (a) 546 342 104 100 __________

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
Income Taxes (Tables)	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The effective income tax rate from continuing operations varies from the U.S. federal statutory rate principally due to the following: Three Months Ended June 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 6.5 7.8 (1.2) 6.8 6.2 5.6 6.3 7.1 Plant basis differences (4.8) (0.6) (15.8) 0.1 (1.6) (2.6) (1.1) — Excess deferred tax amortization (7.4) (5.6) (2.4) (5.3) (8.0) (9.9) (9.9) (2.0) 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) (0.3) — (0.4) (0.9) (1.1) (0.4) (0.3) Other 2.8 — 0.4 0.1 (0.3) 0.5 0.9 (0.7) Effective income tax rate 17.5 % 22.2 % 2.0 % 22.2 % 16.3 % 13.5 % 16.7 % 25.0 % Three Months Ended June 30, 2022 (a) Exelon ComEd PECO (c) BGE (c) PHI Pepco (c) DPL ACE (c) 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 (d) (5.4) 7.9 (0.6) 2.1 1.5 (3.4) 7.2 6.7 Plant basis differences (3.3) (0.5) (11.0) (1.3) (1.7) (2.4) (0.7) (1.0) Excess deferred tax amortization (10.5) (5.5) (3.1) (19.0) (19.2) (15.7) (20.0) (24.5) 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 (0.4) (0.3) — (1.5) (0.4) (0.4) (0.4) (0.4) Other (e) 7.7 — — 1.4 (0.1) (0.5) 1.8 (1.6) Effective income tax rate 9.0 % 22.5 % 6.3 % 2.6 % 1.0 % (1.4) % 8.7 % — % __________ (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 PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. For BGE, the lower effective tax rate is primarily due to the Maryland multi-year plan which resulted in the acceleration of certain income tax benefits. For Pepco, the income tax benefit is primarily due to the Maryland and Washington, D.C. multi-year plans which resulted in the acceleration of certain income tax benefits. For ACE, the lower effective tax rate is primarily due to the acceleration of certain income tax benefits due to distribution rate case settlements. (d) For Exelon, the lower state income taxes, net of federal income tax benefit, is primarily related to a one-time impact associated with a state tax benefit of $43 million and indemnification adjustments pursuant to the Tax Matters Agreement of $5 million as a result of the separation. (e) For Exelon, primarily related to indemnification adjustments pursuant to the Tax Matters Agreement of $48 million. Six Months Ended June 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 6.2 7.8 (1.3) 6.4 6.1 5.5 6.3 6.9 Plant basis differences (4.3) (0.4) (15.4) (0.6) (1.7) (2.6) (1.0) (0.6) Excess deferred tax amortization (6.7) (5.6) (2.4) (5.4) (7.4) (9.1) (9.2) (2.0) 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) (0.3) — (0.4) (0.6) (0.8) (0.4) (0.3) Other 1.3 0.1 — 0.3 — 0.5 0.1 0.1 Effective income tax rate 16.9% 22.5% 1.9% 21.2% 17.3% 14.5% 16.7% 25.0% Six Months Ended June 30, 2022 (a) Exelon ComEd PECO (c) BGE (c) PHI Pepco (c) DPL ACE (c) 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 (d) 9.9 7.9 (0.3) 2.3 2.8 (3.8) 6.5 6.7 Plant basis differences (3.5) (0.5) (11.2) (1.0) (1.7) (2.5) (0.7) (1.2) Excess deferred tax amortization (11.0) (5.8) (3.2) (17.8) (18.3) (16.3) (19.5) (22.9) 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 (e) 0.8 (0.3) — (0.6) (0.4) (0.4) (0.3) (0.3) Other (f) 4.7 0.1 0.3 0.3 0.1 (0.7) 0.4 (0.5) Effective income tax rate 21.8% 22.3% 6.6% 4.1% 3.4% (2.7)% 7.2% 2.6% __________ (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 PECO, the lower effective tax rate is primarily related to plant basis differences attributable to tax repair deductions. For BGE, the lower effective tax rate is primarily due to the Maryland multi-year plan which resulted in the acceleration of certain income tax benefits. For Pepco, the income tax benefit is primarily due to the Maryland and Washington, D.C. multi-year plans which resulted in the acceleration of certain income tax benefits. For ACE, the lower effective tax rate is primarily due to the acceleration of certain income tax benefits due to distribution rate case settlements. (d) 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. (e) 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 [Table Text Block]	Exelon, PHI and ACE have the following unrecognized tax benefits at June 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 June 30, 2023 $ 148 $ 59 $ 17 December 31, 2022 148 59 17 __________

Retirement Benefits (Tables)

Retirement Benefits (Tables)	6 Months Ended
Retirement Benefits (Tables)	Jun. 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 six months ended June 30, 2023 and 2022. Pension Benefits OPEB Three Months Ended June 30, Three Months Ended June 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 38 $ 58 $ 6 $ 10 Interest cost 144 110 26 19 Expected return on assets (188) (205) (21) (25) Amortization of: Prior service cost (credit) — 1 (3) (5) Actuarial loss (gain) 43 73 (1) 4 Net periodic benefit cost $ 37 $ 37 $ 7 $ 3 Pension Benefits OPEB Six Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Components of net periodic benefit cost Service cost $ 77 $ 119 $ 12 $ 20 Interest cost 289 220 51 38 Expected return on assets (377) (414) (42) (50) Amortization of: Prior service cost (credit) 1 2 (5) (10) Actuarial loss (gain) 84 149 (1) 8 Net periodic benefit cost $ 74 $ 76 $ 15 $ 6
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 June 30, Six Months Ended June 30, Pension and OPEB Costs (Benefit) 2023 2022 2023 2022 Exelon $ 44 $ 40 $ 89 $ 82 ComEd 7 14 13 30 PECO (4) (2) (7) (4) BGE 14 11 28 22 PHI 25 13 49 26 Pepco 9 2 17 4 DPL 5 1 9 2 ACE 3 3 7 6
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 six months ended June 30, 2023 and 2022. Three Months Ended June 30, Six Months Ended June 30, Savings Plan Employer Contributions 2023 2022 2023 2022 Exelon $ 26 $ 23 $ 47 $ 43 ComEd 10 10 19 18 PECO 4 3 7 6 BGE 3 3 5 5 PHI 5 4 8 7 Pepco 1 1 2 2 DPL 1 1 2 2 ACE 1 1 1 1

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
Derivative Instruments and Hedging Activities (Tables)	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Derivatives	Below is a summary of the interest rate hedge balances at June 30, 2023 and December 31, 2022 . June 30, 2023 Derivatives Designated Economic Hedges Total Other deferred debits (noncurrent assets) $ 12 $ 5 $ 17 Total derivative assets 12 5 17 Mark-to-market derivative liabilities (current liabilities) — (7) (7) Total mark-to-market derivative liabilities — (7) (7) Total mark-to-market derivative net assets (liabilities) $ 12 $ (2) $ 10 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 June 30, 2023 and December 31, 2022. June 30, 2023 December 31, 2022 5-year maturity floating-to-fixed swaps $ 260 $ 635 10-year maturity floating-to-fixed swaps 260 635 Total $ 520 $ 1,270
Derivatives Not Designated as Hedging Instruments	The following table provides the notional amounts outstanding held by Exelon at June 30, 2023 and December 31, 2022. Hedging Instrument June 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 six months ended June 30, 2023, Exelon Corporate recognized the following net pre-tax mark-to-market gains (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 six months ended June 30, 2022. Three Months Ended June 30, 2023 Six Months Ended June 30, 2023 Income Statement Location (Loss) Gain (Loss) Gain Electric operating revenues $ (6) $ (5) Interest expense 2 1 Total $ (4) $ (4)
Cash collateral held with external counterparties [Table]	The following table reflects the Registrants' cash collateral held with external counterparties, which is recorded in Other current liabilities on their respective Consolidated Balance Sheets, at June 30, 2023 and December 31, 2022: June 30, 2023 December 31, 2022 Exelon $ 108 $ 297 ComEd 102 77 PECO (a) — — BGE 1 23 PHI 6 197 Pepco (b) — 26 DPL (b) — 121 ACE 6 50 __________ (a) PECO had less than one million in cash collateral held with external parties at June 30, 2023 and December 31, 2022 .

Debt and Credit Agreements (Tab

Debt and Credit Agreements (Tables)	6 Months Ended
Debt and Credit Agreements (Tables)	Jun. 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 June 30, 2023 and December 31, 2022. Outstanding Commercial Average Interest Rate on Commercial Paper Issuer June 30, 2023 December 31, 2022 June 30, 2023 December 31, 2022 Exelon (a) $ 336 $ 1,938 5.23 % 4.77 % ComEd 297 427 5.22 % 4.71 % PECO — 239 — % 4.71 % BGE — 409 — % 4.81 % PHI (b) 37 414 5.32 % 4.78 % Pepco — 299 — % 4.79 % DPL — 115 — % 4.76 % ACE 37 — 5.32 % — % __________ (a) Exelon Corporate had $2 million and $449 million in outstanding commercial paper borrowings at June 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 [Table Text Block]	During the six months ended June 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 (a) 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. DPL (b) 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, Pepco entered into a purchase agreement of First Mortgage Bonds of $100 million at 5.35% due on September 13, 2033. The closing date of the issuance is expected to occur in September 2023. (b) 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)	6 Months Ended
Fair Value of Financial Assets and Liabilities (Tables)	Jun. 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 June 30, 2023 and December 31, 2022. The Registrants have no financial liabilities classified as Level 1 or 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. June 30, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Level 2 Level 3 Total Level 2 Level 3 Total Long-Term Debt, including amounts due within one year (a) Exelon $ 40,997 $ 33,514 $ 2,752 $ 36,266 $ 37,074 $ 29,902 $ 2,327 $ 32,229 ComEd 11,482 10,015 — 10,015 10,518 9,006 — 9,006 PECO 5,132 4,426 — 4,426 4,612 3,864 50 3,914 BGE 4,601 4,029 — 4,029 4,207 3,613 — 3,613 PHI 8,550 4,535 2,752 7,287 8,120 4,507 2,277 6,784 Pepco 3,998 2,240 1,469 3,709 3,751 2,229 1,205 3,434 DPL 2,061 1,168 589 1,757 1,938 1,164 458 1,622 ACE 1,834 914 694 1,608 1,757 909 614 1,523 Long-Term Debt to Financing Trusts Exelon $ 390 $ — $ 392 $ 392 $ 390 $ — $ 384 $ 384 ComEd 205 — 207 207 205 — 204 204 PECO 184 — 185 185 184 — 180 180 __________
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	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 June 30, 2023 and December 31, 2022. The Registrants have no financial assets or liabilities measured using the NAV practical expedient: Exelon At June 30, 2023 At December 31, 2022 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 702 $ — $ — $ 702 $ 664 $ — $ — $ 664 Rabbi trust investments Cash equivalents 66 — — 66 62 — — 62 Mutual funds 50 — — 50 49 — — 49 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 58 42 100 — 58 40 98 Rabbi trust investments subtotal 116 65 42 223 111 65 40 216 Interest rate derivative assets Derivatives designated as hedging instruments — 12 — 12 — 6 — 6 Economic hedges — 5 — 5 — 5 — 5 Interest rate derivative assets subtotal — 17 — 17 — 11 — 11 Total assets 818 82 42 942 775 76 40 891 Liabilities Commodity derivative liabilities — — (133) (133) — — (84) (84) Interest rate derivative liabilities Derivatives designated as hedging instruments — — — — — (4) — (4) Economic hedges — (7) — (7) — (3) — (3) Interest rate derivative liabilities subtotal — (7) — (7) — (7) — (7) Deferred compensation obligation — (74) — (74) — (75) — (75) Total liabilities — (81) (133) (214) — (82) (84) (166) Total net assets (liabilities) $ 818 $ 1 $ (91) $ 728 $ 775 $ (6) $ (44) $ 725 __________ (a) Exelon excludes cash of $225 million and $345 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $108 million and $81 million at June 30, 2023 and December 31, 2022, respectively, and includes long-term restricted cash of $201 million and $117 million at June 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 June 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) $ 484 $ — $ — $ 484 $ 69 $ — $ — $ 69 $ 76 $ — $ — $ 76 Rabbi trust investments Mutual funds — — — — 9 — — 9 9 — — 9 Life insurance contracts — — — — — 16 — 16 — — — — Rabbi trust investments subtotal — — — — 9 16 — 25 9 — — 9 Total assets 484 — — 484 78 16 — 94 85 — — 85 Liabilities Commodity derivative liabilities (b) — — (133) (133) — — — — — — — — Deferred compensation obligation — (7) — (7) — (8) — (8) — (4) — (4) Total liabilities — (7) (133) (140) — (8) — (8) — (4) — (4) Total net assets (liabilities) $ 484 $ (7) $ (133) $ 344 $ 78 $ 8 $ — $ 86 $ 85 $ (4) $ — $ 81 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 $50 million and $42 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $102 million and $77 million at June 30, 2023 and December 31, 2022, respectively. Additionally, ComEd includes long-term restricted cash of $201 million and $117 million at June 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 $22 million and $58 million at June 30, 2023 and December 31, 2022, respectively. BGE excludes cash of $13 million and $43 million at June 30, 2023 and December 31, 2022, respectively, and restricted cash of $1 million and $1 million at June 30, 2023 and December 31, 2022, respectively. (b) The Level 3 balance consists of the current and noncurrent liability of $24 million and $109 million, respectively, at June 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 June 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) $ 30 $ — $ — $ 30 $ 205 $ — $ — $ 205 Rabbi trust investments Cash equivalents 63 — — 63 59 — — 59 Mutual funds 9 — — 9 11 — — 11 Fixed income — 7 — 7 — 7 — 7 Life insurance contracts — 20 42 62 — 22 39 61 Rabbi trust investments subtotal 72 27 42 141 70 29 39 138 Total assets 102 27 42 171 275 29 39 343 Liabilities Deferred compensation obligation — (13) — (13) — (14) — (14) Total liabilities — (13) — (13) — (14) — (14) Total net assets $ 102 $ 14 $ 42 $ 158 $ 275 $ 15 $ 39 $ 329 Pepco DPL ACE At June 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 Rabbi trust investments Cash equivalents 62 — — 62 — — — — — — — — Life insurance contracts — 20 42 62 — — — — — — — — Rabbi trust investments subtotal 62 20 42 124 — — — — — — — — Total assets 84 20 42 146 — — — — 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 84 $ 19 $ 42 $ 145 $ — $ — $ — $ — $ 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 six months ended June 30, 2023 and 2022: Exelon ComEd PHI and Pepco Three Months Ended June 30, 2023 Total Commodity Life Insurance Contracts Balance at March 31, 2023 $ (57) $ (98) $ 41 Total realized / unrealized gains (losses) Included in net income (a) 1 — 1 Included in regulatory assets/liabilities (35) (35) (b) — Balance at June 30, 2023 $ (91) $ (133) (c) $ 42 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at June 30, 2023 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Three Months Ended June 30, 2022 Total Commodity Life Insurance Contracts Balance at March 31, 2022 $ (107) $ (144) $ 36 Total realized / unrealized gains (losses) Included in net income (a) 1 — 1 Included in regulatory assets/liabilities 56 56 (b) — Balance at June 30, 2022 $ (50) $ (88) (c) $ 37 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at June 30, 2022 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Six Months Ended June 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 — 2 Included in regulatory assets/liabilities (49) (49) (b) — Balance at June 30, 2023 $ (91) $ (133) (c) $ 42 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities at June 30, 2023 $ 2 $ — $ 2 Exelon ComEd PHI and Pepco Six Months Ended June 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) 2 — 2 Included in regulatory assets/liabilities 131 131 (b) — Transfers out of Level 3 (1) — — Balance at June 30, 2022 $ (50) $ (88) (c) $ 37 The amount of total gains included in income attributed to the change in unrealized gain related to assets and liabilities at June 30, 2022 $ 2 $ — $ 2 __________ (a) Classified in Operating and maintenance expense in the Consolidated Statements of Operations and Comprehensive Income. (b) Includes $43 million of decreases in fair value and an increase for realized gains due to settlements of $8 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended June 30, 2023. Includes $59 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 three months ended June 30, 2022. Includes $68 million of decreases in fair value and an increase for realized losses due to settlements of $19 million recorded in Purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the six months ended June 30, 2023. Includes $128 million of increases in fair value and an increase 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 six months ended June 30, 2022. (c) The balance consists of a current and noncurrent liability of $24 million and $109 million, respectively, at June 30, 2023. The balance consists of $15 million of current assets and current and noncurrent liability of none and $103 million, respectively at June 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 June 30, 2023 Fair Value at December 31, 2022 Valuation Unobservable 2023 Range & Arithmetic Average 2022 Range & Arithmetic Average Commodity derivatives $ (133) $ (84) Discounted Forward power price (a) $25.56 - $75.64 $43.03 $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)	6 Months Ended
Commitments and Contingencies (Tables)	Jun. 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 June 30, 2023: Description Exelon PHI Pepco DPL ACE Total commitments $ 513 $ 320 $ 120 $ 89 $ 111 Remaining commitments (a) 44 40 35 3 2 __________ (a) Remaining commitments extend through 2026 and include rate credits, energy efficiency programs and delivery system modernization.
Commercial Commitments	The Registrants’ commercial commitments at June 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 $ 21 $ 13 $ 8 $ — $ — $ — $ — Surety bonds (a) 206 172 34 — — — — Financing trust guarantees 378 — — — — — 378 Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 634 $ 185 $ 46 $ 6 $ 5 $ 4 $ 388 ComEd Letters of credit $ 12 $ 9 $ 3 $ — $ — $ — $ — Surety bonds (a) 46 39 7 — — — — Financing trust guarantees 200 — — — — — 200 Total commercial commitments $ 258 $ 48 $ 10 $ — $ — $ — $ 200 PECO Letters of credit $ 1 $ — $ 1 $ — $ — $ — $ — Surety bonds (a) 2 1 1 — — — — Financing trust guarantees 178 — — — — — 178 Total commercial commitments $ 181 $ 1 $ 2 $ — $ — $ — $ 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 $ 77 $ 20 $ — $ — $ — $ — Guaranteed lease residual values (b) 29 — 4 6 5 4 10 Total commercial commitments $ 126 $ 77 $ 24 $ 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 $ 3 $ 4 $ — $ — $ — $ — Guaranteed lease residual values (b) 12 — 2 2 2 2 4 Total commercial commitments $ 19 $ 3 $ 6 $ 2 $ 2 $ 2 $ 4 ACE Surety bonds (a) $ 5 $ 3 $ 2 $ — $ — $ — $ — Guaranteed lease residual values (b) 7 — 1 1 1 1 3 Total commercial commitments $ 12 $ 3 $ 3 $ 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 $65 million guaranteed by Exelon and PHI, of which $22 million, $27 million, and $16 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 June 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: June 30, 2023 December 31, 2022 Total environmental Portion of total related to Total environmental Portion of total related to Exelon $ 423 $ 334 $ 409 $ 355 ComEd 304 303 325 324 PECO 24 23 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)	6 Months Ended
Changes in Accumulated Other Comprehensive Income (Tables)	Jun. 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: Three Months Ended June 30, 2023 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total 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) Three Months Ended June 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total 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) Six Months Ended June 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 15 (13) — 2 Amounts reclassified from AOCI — 6 — 6 Net current-period OCI 15 (7) — 8 Balance at June 30, 2023 $ 17 $ (647) $ — $ (630) Six Months Ended June 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 OCI before reclassifications — 2 — 2 Amounts reclassified from AOCI — 24 — 24 Net current-period OCI — 26 — 26 Balance at June 30, 2022 $ — $ (701) $ — $ (701) __________
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 June 30, Six Months Ended June 30, 2023 2022 2023 2022 Pension and non-pension postretirement benefit plans: Actuarial loss reclassified to periodic benefit cost $ (1) $ (3) $ (2) $ (8) Pension and non-pension postretirement benefit plans valuation adjustment 1 (1) 4 — Unrealized gain on cash flow hedges (3) — (4) —

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	6 Months Ended
Supplemental Financial Information (Tables)	Jun. 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 June 30, 2023 Utility taxes (a) $ 201 $ 71 $ 38 $ 22 $ 70 $ 63 $ 6 $ 1 Property 96 8 4 49 35 24 10 1 Payroll 31 7 4 5 7 2 1 1 Three Months Ended June 30, 2022 Utility taxes (a) $ 203 $ 71 $ 39 $ 20 $ 73 $ 67 $ 5 $ 1 Property 94 10 4 46 33 23 10 — Payroll 28 7 5 4 7 1 1 1 Six Months Ended June 30, 2023 Utility taxes (a) $ 421 $ 146 $ 78 $ 50 $ 147 $ 131 $ 14 $ 2 Property 196 18 8 100 70 48 21 1 Payroll 63 14 9 9 14 4 2 2 Six Months Ended June 30, 2022 Utility taxes (a) $ 424 $ 149 $ 77 $ 47 $ 151 $ 137 $ 12 $ 2 Property 188 20 9 92 67 46 20 1 Payroll 64 13 8 9 14 3 2 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 June 30, 2023 AFUDC — Equity $ 34 $ 7 $ 6 $ 4 $ 17 $ 13 $ 2 $ 2 Non-service net periodic benefit credit (1) — — — — — — — Three Months Ended June 30, 2022 AFUDC — Equity $ 38 $ 9 $ 8 $ 6 $ 15 $ 11 $ 2 $ 2 Non-service net periodic benefit cost 16 — — — — — — — Six Months Ended June 30, 2023 AFUDC — Equity $ 71 $ 17 $ 12 $ 7 $ 35 $ 27 $ 4 $ 4 Non-service net periodic benefit credit (2) — — — — — — — Six Months Ended June 30, 2022 AFUDC — Equity $ 74 $ 17 $ 15 $ 12 $ 30 $ 22 $ 4 $ 4 Non-service net periodic benefit cost 33 — — — — — — —
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 Six Months Ended June 30, 2023 Property, plant, and equipment (b) $ 1,370 $ 540 $ 190 $ 249 $ 364 $ 152 $ 104 $ 96 Amortization of regulatory assets (b) 352 148 7 76 120 64 17 39 Amortization of intangible assets, net (b) 4 — — — — — — — ARO accretion (e) 1 — — — — — — — Total depreciation and amortization $ 1,727 $ 688 $ 197 $ 325 $ 484 $ 216 $ 121 $ 135 Six Months Ended June 30, 2022 Property, plant, and equipment (b) $ 1,376 $ 511 $ 177 $ 235 $ 335 $ 145 $ 92 $ 83 Amortization of regulatory assets (b) 357 138 8 87 124 68 21 35 Amortization of intangible assets, net (b) 8 — — — — — — — Amortization of energy contract assets and liabilities (c) 3 — — — — — — — Nuclear fuel (d) 66 — — — — — — — ARO accretion (e) 44 — — — — — — — Total depreciation, amortization, and accretion $ 1,854 $ 649 $ 185 $ 322 $ 459 $ 213 $ 113 $ 118 __________ (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 Six Months Ended June 30, 2023 Pension and OPEB costs (benefit) $ 89 $ 13 $ (7) $ 28 $ 49 $ 17 $ 9 $ 7 Allowance for credit losses 46 1 19 4 22 13 3 6 True-up adjustments to decoupling mechanisms and formula rates (b) (410) (270) 10 (70) (80) (46) (15) (19) Long-term incentive plan 13 — — — — — — — Amortization of operating ROU asset 19 1 — 2 14 2 4 2 Change in environmental liabilities 37 — — — 37 37 — — AFUDC — Equity (71) (17) (12) (7) (35) (27) (4) (4) Six Months Ended June 30, 2022 Pension and OPEB costs (benefit) $ 86 $ 30 $ (4) $ 22 $ 26 $ 4 $ 2 $ 6 Allowance for credit losses 96 29 21 18 29 16 6 7 Other decommissioning-related activity 36 — — — — — — — Energy-related options 60 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (27) (75) (6) 32 22 7 3 12 Long-term incentive plan 40 — — — — — — — Amortization of operating ROU asset 38 1 — 14 14 4 4 2 AFUDC — Equity (74) (17) (15) (12) (30) (22) (4) (4) __________ (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. Exelon ComEd PECO BGE PHI Pepco DPL ACE June 30, 2023 Cash and cash equivalents $ 399 $ 74 $ 82 $ 89 $ 110 $ 16 $ 18 $ 24 Restricted cash and cash equivalents 435 361 9 1 26 26 — — Restricted cash included in other deferred debits and other assets 201 201 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,035 $ 636 $ 91 $ 90 $ 136 $ 42 $ 18 $ 24 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 June 30, 2022 Cash and cash equivalents $ 816 $ 120 $ 23 $ 354 $ 278 $ 14 $ 26 $ 233 Restricted cash and cash equivalents 961 384 9 205 341 117 223 — Restricted cash included in other deferred debits and other assets 59 59 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,836 $ 563 $ 32 $ 559 $ 619 $ 131 $ 249 $ 233 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 Disclosures	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 June 30, 2023 Compensation-related accruals (a) $ 467 $ 121 $ 65 $ 59 $ 88 $ 26 $ 17 $ 14 Taxes accrued 179 101 40 33 75 52 13 8 Interest accrued 423 151 48 43 69 37 12 15 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)	6 Months Ended
Related Party Transactions (Tables)	Jun. 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. Six Months Ended June 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 June 30, Six Months Ended June 30, Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 2023 2022 2023 2022 Exelon BSC $ 165 $ 139 $ 340 $ 344 PHISCO 25 21 49 40 ComEd BSC $ 88 $ 80 $ 171 $ 165 78 67 159 152 PECO BSC 54 47 105 96 30 20 60 56 BGE BSC 54 51 108 102 22 22 46 60 PHI BSC 43 46 85 96 35 30 75 76 PHISCO — — — — 25 21 49 40 Pepco BSC 28 27 55 56 14 11 28 28 PHISCO 30 29 60 58 10 8 21 16 DPL BSC 18 17 35 35 10 9 20 23 PHISCO 25 25 49 49 8 7 15 13 ACE BSC 15 14 29 29 12 10 26 25 PHISCO 22 22 44 43 7 6 13 11
Current Receivables From/Payables To Affiliates	The following tables present current Receivables from affiliates and current Payables to affiliates: June 30, 2023 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 62 $ — $ 9 $ 71 PECO $ — — — — — 33 — 3 36 BGE — — — — — 30 — 2 32 PHI — — — — — — 7 — 11 18 Pepco — — — — — 17 15 — 32 DPL — — — — — 11 11 1 23 ACE — — — — — 10 11 1 22 Other 3 1 — — — 2 — — 6 Total $ 3 $ 1 $ — $ — $ — $ 2 $ 170 $ 37 $ 27 $ 240 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: June 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		5 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Feb. 01, 2022
Discontinued Operations - Income Statement
Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Expense	$ 44	$ 69	$ 125	$ 94
Nonoperating Income (Expense)	(288)	(183)		(591)	$ (384)
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic	0	0		0	116
Income taxes	73	46		206	263
Other, net	139	175		249	313
Net income (loss) attributable to noncontrolling interests	0	0		0	1
Taxes, Miscellaneous	324	330		679	684
Revenues	4,818	4,239		10,380	9,566
Cost, Depreciation and Amortization	866	830		1,727	1,647
Costs and Expenses	4,114	3,543		8,571	7,971
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	0		0	117
Total Liabilities	73,001			73,001		$ 70,605
Assets	98,080			98,080		95,349
Decrease in capital expenditures not paid				(164)	(276)
Collection of deferred purchase price				0	169
Other non-cash operating activities				222	(276)
Increase in PPE related to ARO update				0	(335)
Unrealized Gain (Loss) on Derivatives				(4)	59
Capital expenditures				3,685	3,507
Depreciation, Amortization and Accretion, Net				1,727	1,854
Gain (Loss) on Investments				0	(205)
Deferred income taxes and amortization of investment tax credits				94	143
Increase in deferred purchase price				0	348
Gain (Loss) on Sale of Assets and Asset Impairment Charges				0	8
Unrealized loss on equity investments				0	(16)
Nonrelated Party
Discontinued Operations - Income Statement
Operating and maintenance	1,197	1,109		2,347	2,288
Exelon Generation Co L L C [Member]
Discontinued Operations - Income Statement
Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Expense	3	11	$ 20	9
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	0		0	78
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
Nonoperating Income (Expense)	0	0		0	(301)
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic	0	0		0	116
Income taxes	0	0		0	(40)
Other, net	0	0		0	(281)
Net income (loss) 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
Costs and Expenses	0	0		0	1,647
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	0		0	117
Disposal Group, Including Discontinued Operation, Revenue	0	0		0	2,016
Total Liabilities	0			0		0
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, Amortization and Accretion, Net				0	207
Gain (Loss) on Investments				0	(205)
Deferred income taxes and amortization of investment tax credits				0	(143)
Increase in deferred purchase price				0	348
Gain (Loss) on Sale of Assets and Asset Impairment Charges				0	(9)
Unrealized loss on equity investments				0	(16)
Revenues from Related Parties	0	0		0
Exelon Generation Co L L C [Member] \| Related Party
Discontinued Operations - Income Statement
Revenue from Contract with Customer, Including Assessed Tax	0	0		0	161
Exelon Generation Co L L C [Member] \| Nonrelated Party
Discontinued Operations - Income Statement
Revenue from Contract with Customer, Including Assessed Tax	$ 0	$ 0		$ 0	$ 1,855

Discontinued Operations and D_2

Discontinued Operations and Disposal Groups (Details) - Income Statement - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Discontinued Operations - Income Statement
Cost, Depreciation and Amortization	$ 866	$ 830	$ 1,727	$ 1,647
Taxes, Miscellaneous	324	330	679	684
Costs and Expenses	4,114	3,543	8,571	7,971
Other, net	139	175	249	313
Nonoperating Income (Expense)	(288)	(183)	(591)	(384)
Income taxes	73	46	206	263
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	0	0	117
Net income (loss) attributable to noncontrolling interests	0	0	0	1
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic	0	0	0	116
Total transaction and transition costs incurred related to the Separation				52
Nonrelated Party
Discontinued Operations - Income Statement
Operating and maintenance	1,197	1,109	2,347	2,288
Exelon Generation Co L L C [Member]
Discontinued Operations - Income Statement
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
Costs and 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)
Nonoperating Income (Expense)	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)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	0	0	117
Net income (loss) attributable to noncontrolling interests	0	0	0	1
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic	0	0	0	116
Exelon Generation Co L L C [Member] \| Nonrelated Party
Discontinued Operations - Income Statement
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	1,855
Exelon Generation Co L L C [Member] \| Related Party
Discontinued Operations - Income Statement
Revenue from Contract with Customer, Including Assessed Tax	$ 0	$ 0	$ 0	$ 161

Discontinued Operations and D_3

Discontinued Operations and Disposal Groups (Details) - Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Discontinued Operations - Income Statement
Depreciation, Amortization and Accretion, Net	$ 1,727	$ 1,854
Gain (Loss) on Sale of Assets and Asset Impairment Charges	0	(8)
Deferred income taxes and amortization of investment tax credits	94	143
Net fair value changes related to derivatives	4	(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	222	(276)
Payments to Acquire Property, Plant, and Equipment	(3,685)	(3,507)
Collection of deferred purchase price	0	169
Decrease in capital expenditures not paid	(164)	(276)
Increase in deferred purchase price	0	348
Increase in PPE related to ARO update	0	(335)
Exelon Generation Co L L C [Member]
Discontinued Operations - Income Statement
Depreciation, Amortization and Accretion, Net	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
Payments to Acquire Property, Plant, and Equipment	0	(227)
Collection of deferred purchase price	0	169
Decrease in capital expenditures not paid	0	(128)
Increase in deferred purchase price	0	348
Increase in PPE related to ARO update	$ 0	$ 335

Regulatory Matters - Narrative

Regulatory Matters - Narrative (Details)			6 Months Ended		36 Months Ended	48 Months Ended
Regulatory Matters - Narrative (Details)	Sep. 27, 2022	Feb. 03, 2022	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2027 USD ($)	Jun. 30, 2027 USD ($)	Mar. 31, 2022 USD ($)
Commonwealth Edison Co [Member]
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			$ 779,000,000
Commonwealth Edison Co [Member] \| Forecast [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Initial requested revenue increase 2024-2027						$ 1,470,000,000
Current requested revenue increase 2024-2027						$ 1,540,000,000
Beneficial electrification approved annual spending					$ 77,000,000
Commonwealth Edison Co [Member] \| Carbon Mitigation Credit rider
Regulatory Matters Additional Narrative Information [Line Items]
Regulatory Assets			1,079,000,000
Increase (Decrease) in Regulatory Assets			236,000,000
Commonwealth Edison Co [Member] \| Electric Distribution Formula Rate Annual Reconciliations
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			252,000,000
Commonwealth Edison Co [Member] \| ZEC regulatory asset
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			145,000,000
PECO Energy Co [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			87,000,000
Increase (Decrease) in Regulatory Liabilities			66,000,000
PECO Energy Co [Member] \| Nuclear Decommissioning [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities			26,000,000
PECO Energy Co [Member] \| Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities			55,000,000
PECO Energy Co [Member] \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			76,000,000
Baltimore Gas and Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			78,000,000
Baltimore Gas and Electric Company [Member] \| Under-recovered revenue decoupling
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			54,000,000
Potomac Electric Power Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities			(29,000,000)
Potomac Electric Power Company [Member] \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities			(27,000,000)
Delmarva Power and Light Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			(18,000,000)
Delmarva Power and Light Company [Member] \| Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			(21,000,000)
Atlantic City Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability			94,000,000					$ 203,000,000
Gain (Loss) on Contract Termination			43,000,000	$ 23,000,000
Increase (Decrease) in Regulatory Assets			(20,000,000)
Atlantic City Electric Company [Member] \| 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 [Member] \| Other Current Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability			74,000,000
Atlantic City Electric Company [Member] \| Other Noncurrent Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability			20,000,000
Atlantic City Electric Company [Member] \| Electric Energy Costs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			$ 45,000,000

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 [Member]

Regulatory Matters Completed Rate Cases [Line Items]

Basis points for ComEd's Revenue Requirement

580

Commonwealth Edison Co [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 [Member] | 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 ($) $ in Millions								3 Months Ended
	May 16, 2023	Apr. 21, 2023	Apr. 13, 2023	Feb. 28, 2023	Feb. 17, 2023	Feb. 15, 2023	Jan. 17, 2023	Jun. 30, 2023	Jun. 30, 2022
Commonwealth Edison Co [Member] \| Illinois 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)							$ 1,545
Commonwealth Edison Co [Member] \| 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 [Member] \| 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 [Member] \| 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							$ 980
Public Utilities, Requested Equity Capital Structure, Percentage							7.43%
Commonwealth Edison Co [Member] \| Illinois 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation							$ 176
Requested Return on Equity, Percentage							10.55%
Public Utilities, Requested Equity Capital Structure, Percentage							7.50%
Commonwealth Edison Co [Member] \| 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							$ 187
Public Utilities, Requested Equity Capital Structure, Percentage							7.62%
Public Utilities, Requested Rate Increase (Decrease), Proposed Revenue Requirement Phase-In							$ 343
Commonwealth Edison Co [Member] \| 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							$ 202
Public Utilities, Requested Equity Capital Structure, Percentage							7.70%
Commonwealth Edison Co [Member] \| 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
Requested Return on Equity, Percentage		8.91%
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 313
Requested Return on Equity, Percentage					10.40%
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 85
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					103
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Electric Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					125
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Gas Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 289
Requested Return on Equity, Percentage					10.40%
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Gas Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 158
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Gas Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					77
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Gas Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)					$ 54
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Electric Distribution Reconciliation Rate Case \| 2021
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)									$ 11
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Electric Distribution Reconciliation Rate Case \| 2022
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)								$ 44
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Gas Distribution Reconciliation Rate Case \| 2021
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)									$ 7
Baltimore Gas and Electric Company [Member] \| Maryland 2023 Gas Distribution Reconciliation Rate Case \| 2022
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)								$ 15
Potomac Electric Power Company [Member] \| District of Columbia 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease), Amended			$ 191
Requested Return on Equity, Percentage			10.50%
Potomac Electric Power Company [Member] \| District of Columbia 2023 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			$ 117
Potomac Electric Power Company [Member] \| District of Columbia 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			37
Potomac Electric Power Company [Member] \| District of Columbia 2023 Electric Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			$ 37
Potomac Electric Power Company [Member] \| Pepco Maryland 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease), Amended	$ 214
Requested Return on Equity, Percentage	10.50%
Potomac Electric Power Company [Member] \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)	$ 74
Potomac Electric Power Company [Member] \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)	60
Potomac Electric Power Company [Member] \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2026
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)	60
Potomac Electric Power Company [Member] \| Pepco Maryland 2023 Electric Distribution Base Rate Case \| 2027
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)	$ 20
Delmarva Power and Light Company [Member] \| Delaware DE 2022 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease), Amended				$ 42
Requested Return on Equity, Percentage				10.50%
Atlantic City Electric Company [Member] \| New Jersey 2023 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease), Amended						$ 94
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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] $ 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	Jun. 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	$ 63	$ 57
Commonwealth Edison Co [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	19	8
PECO Energy Co [Member]
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 [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	23	28
Pepco Holdings LLC [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	21	21
Potomac Electric Power Company [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	18	18
Delmarva Power and Light Company [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	2	2
Atlantic City Electric Company [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	$ 1	$ 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
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	$ 98	$ 100	$ 105	$ 107	$ 101	$ 109
Revenues recognized, contract liabilities	(2)	(1)	(2)	(2)
Pepco Holdings LLC [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	98	100	105	107	101	109
Revenues recognized, contract liabilities	(2)	(1)	(2)	(2)
Potomac Electric Power Company [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	78	80	84	85	81	87
Revenues recognized, contract liabilities	(2)	(1)	(1)	(2)
Delmarva Power and Light Company [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	10	10	11	11	10	11
Revenues recognized, contract liabilities	0	0	0	0
Atlantic City Electric Company [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	10	10	10	11	$ 10	$ 11
Revenues recognized, contract liabilities	$ 0	$ 0	$ (1)	$ 0

Revenue from Contract with Cust

Revenue from Contract with Customer - Performance Obligations (Details) $ in Millions	Jun. 30, 2023 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 98
Pepco Holdings LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	98
Potomac Electric Power Company [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	78
Delmarva Power and Light Company [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	10
Atlantic City Electric Company [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	10
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01 \| Pepco Holdings LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01 \| Potomac Electric Power Company [Member]
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	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01 \| Delmarva Power and Light Company [Member]
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	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01 \| Atlantic City Electric Company [Member]
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	6 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 [Member]
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 [Member]
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 [Member]
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 [Member]
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	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 [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
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	$ 75
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 [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 75
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 [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 58
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 [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 9
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 [Member]
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)	6 Months Ended
Segment Information - Narrative (Details)	Jun. 30, 2023 Reportable_segment
Segment Reporting Information [Line Items]
Number of reportable segments	6
Pepco Holdings LLC [Member]
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				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenues	$ 4,818		$ 4,239		$ 10,380	$ 9,566
Income (Loss) before income taxes	416		511		1,218	1,209
Income taxes	73		46		206	263
Net income (loss)	343	$ 669	465	$ 598	1,012	1,063
Capital expenditures					3,685	3,507
Assets	98,080				98,080		$ 95,349
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	343		465		1,012	946
Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues	1,305		1,221		2,841	2,626
Income (Loss) before income taxes	123		101		312	238
Income taxes	20		1		54	8
Net income (loss)	103	$ 155	100	$ 130	258	230
Capital expenditures					1,022	776
Assets	26,241				26,241		26,082
Related Party
Segment Reporting Information [Line Items]
Interest Expense, Other	6		6		12	13
Related Party \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues from Related Parties	2		2		4	6
Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	4,818		4,239		10,380	9,566
Depreciation and Amortization	866		830		1,727	1,647
Operating Expenses	4,114		3,543		8,571	7,971
Interest Expense, Other	427		358		840	697
Income (Loss) before income taxes	416		511		1,218	1,209
Income taxes	73		46		206	263
Capital expenditures	1,804		1,585		3,685	3,280
Assets	98,080				98,080		95,349
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	343		465		1,012	946
Operating Segment [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	0		0		0	6
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(447)		(393)		(893)	(982)
Depreciation and Amortization	0		1		2	0
Operating Expenses	(442)		(378)		(889)	(909)
Interest Expense, Other	0		1		(2)	0
Income (Loss) before income taxes	(6)		(1)		(5)	(45)
Income taxes	0		0		0	(12)
Capital expenditures	0		0		0	0
Assets	(4,450)				(4,450)		(4,260)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(6)		(1)		(4)	(33)
Intersegment Eliminations [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues	(108)		(99)		(210)	(195)
Depreciation and Amortization	0		0		0	0
Operating Expenses	(108)		(99)		(210)	(195)
Interest Expense, Other	0		0		0	(1)
Income (Loss) before income taxes	1		0		0	0
Income taxes	0		0		0	0
Net income (loss)	1		0		0	0
Capital expenditures	0		0		0	0
Assets	(243)				(243)		(33)
Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	(440)		(393)		(884)	(981)
Intersegment Eliminations [Member] \| Related Party \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues from Related Parties	(107)		(101)		(209)	(196)
Commonwealth Edison Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,901		1,425		3,568	3,158
Depreciation and Amortization	350		328		688	649
Operating Expenses	1,478		1,039		2,734	2,444
Interest Expense, Other	120		104		237	204
Income (Loss) before income taxes	320		293		631	534
Income taxes	71		66		142	119
Capital expenditures	645		591		1,262	1,208
Assets	41,672				41,672		39,661
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	249		227		489	415
Commonwealth Edison Co [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	2		3		5	8
PECO Energy Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	828		816		1,940	1,863
Depreciation and Amortization	99		93		197	185
Operating Expenses	687		639		1,590	1,432
Interest Expense, Other	48		43		97	84
Income (Loss) before income taxes	99		142		268	363
Income taxes	2		9		5	24
Capital expenditures	372		314		707	658
Assets	15,207				15,207		14,502
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	97		133		263	339
PECO Energy Co [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	2		1		4	2
Baltimore Gas and Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	797		786		2,053	1,940
Depreciation and Amortization	158		152		325	322
Operating Expenses	704		717		1,667	1,636
Interest Expense, Other	44		36		88	71
Income (Loss) before income taxes	54		38		306	244
Income taxes	12		1		65	10
Capital expenditures	306		275		656	578
Assets	13,488				13,488		13,350
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	42		37		241	234
Baltimore Gas and Electric Company [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	2		3		4	10
Pepco Holdings LLC [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,305		1,221		2,841	2,626
Depreciation and Amortization	243		240		484	459
Operating Expenses	1,126		1,066		2,423	2,282
Interest Expense, Other	81		73		157	143
Income (Loss) before income taxes	123		101		312	238
Income taxes	20		1		54	8
Net income (loss)	103		100		258	230
Capital expenditures	461		367		1,022	776
Assets	26,241				26,241		26,082
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	103		100		258	230
Pepco Holdings LLC [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	2		2		4	6
Potomac Electric Power Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	642		581		1,351	1,195
Depreciation and Amortization	109		105		216	213
Operating Expenses	541		487		1,151	1,034
Interest Expense, Other	43		38		81	74
Income (Loss) before income taxes	74		69		152	113
Income taxes	10		(1)		22	(3)
Net income (loss)	64		70		130	116
Capital expenditures	219		184		483	402
Assets	10,838				10,838		10,657
Potomac Electric Power Company [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	2		2		3	2
Delmarva Power and Light Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	349		332		823	763
Depreciation and Amortization	60		56		121	113
Operating Expenses	305		296		693	653
Interest Expense, Other	18		17		36	33
Income (Loss) before income taxes	30		23		102	83
Income taxes	5		2		17	6
Net income (loss)	25		21		85	77
Capital expenditures	124		91		258	194
Assets	5,823				5,823		5,802
Delmarva Power and Light Company [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	2		2		3	3
Atlantic City Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	317		309		670	658
Depreciation and Amortization	68		72		135	118
Operating Expenses	280		283		577	593
Interest Expense, Other	17		17		34	32
Income (Loss) before income taxes	24		11		68	38
Income taxes	6		0		17	1
Net income (loss)	18		11		51	37
Capital expenditures	114		92		275	179
Assets	5,088				5,088		4,979
Atlantic City Electric Company [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	1		1		1	2
Corporate and Other [Member] \| Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenues	434		384		871	961
Depreciation and Amortization	16		16		31	32
Operating Expenses	561		460		1,046	1,086
Interest Expense, Other	134		101		263	195
Income (Loss) before income taxes	(174)		(62)		(294)	(125)
Income taxes	(32)		(31)		(60)	114
Capital expenditures	20		38		38	60
Assets	5,922				5,922		6,014
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(142)		(31)		(235)	(239)
Corporate and Other [Member] \| Corporate, Non-Segment [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues	105		98		207	205
Depreciation and Amortization	6		7		12	15
Operating Expenses	108		99		212	197
Interest Expense, Other	3		1		6	5
Income (Loss) before income taxes	(6)		(2)		(10)	4
Income taxes	(1)		0		(2)	4
Net income (loss)	(5)		(2)		(8)	0
Capital expenditures	4		0		6	1
Assets	4,735				4,735		$ 4,677
Corporate and Other [Member] \| Intersegment Eliminations [Member] \| Related Party
Segment Reporting Information [Line Items]
Revenues from Related Parties	432		384		867	961
Corporate and Other [Member] \| Intersegment Eliminations [Member] \| Related Party \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues from Related Parties	104		98		206	195
Rate-regulated electric revenues [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,434		3,934		8,896	8,415
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,265		1,199		2,637	2,522
Rate-regulated electric revenues [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,556		3,938		9,264	8,460
Rate-regulated electric revenues [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(10)		(6)		(14)	(14)
Rate-regulated electric revenues [Member] \| Intersegment Eliminations [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(5)		(3)		(7)	5
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,901		1,425		3,568	3,158
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	719		708		1,514	1,449
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	672		629		1,485	1,366
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,274		1,182		2,711	2,501
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	642		581		1,351	1,195
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	320		295		697	643
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	317		309		670	658
Rate-regulated electric revenues [Member] \| Corporate and Other [Member] \| Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Rate-regulated electric revenues [Member] \| Corporate and Other [Member] \| Corporate, Non-Segment [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Rate-regulated natural gas revenues [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	258		307		1,080	1,124
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	29		37		126	120
Rate-regulated natural gas revenues [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	262		301		1,116	1,106
Rate-regulated natural gas revenues [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(1)		(1)		(4)	(2)
Rate-regulated natural gas revenues [Member] \| Intersegment Eliminations [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	109		108		426	414
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	125		157		568	574
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	29		37		126	120
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	29		37		126	120
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Rate-regulated natural gas revenues [Member] \| Corporate and Other [Member] \| Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Rate-regulated natural gas revenues [Member] \| Corporate and Other [Member] \| Corporate, Non-Segment [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(436)		(386)		(875)	(966)
Shared service and other revenues [Member] \| Intersegment Eliminations [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(103)		(96)		(203)	(200)
Shared service and other revenues [Member] \| Commonwealth Edison Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| PECO Energy Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| Pepco Holdings LLC [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	2		2		4	5
Shared service and other revenues [Member] \| Potomac Electric Power Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| Delmarva Power and Light Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| Atlantic City Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0		0		0	0
Shared service and other revenues [Member] \| Corporate and Other [Member] \| Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	434		384		871	961
Shared service and other revenues [Member] \| Corporate and Other [Member] \| Corporate, Non-Segment [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 105		$ 98		$ 207	$ 205

Segment Information - Electric

Segment Information - Electric and Gas Revenue by Customer Class (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue, Major Customer [Line Items]
Revenues	$ 4,818	$ 4,239	$ 10,380	$ 9,566
Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenues	4,818	4,239	10,380	9,566
Operating Segment [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	0	0	0	6
Commonwealth Edison Co [Member]
Revenue, Major Customer [Line Items]
Revenues	1,901	1,425	3,568	3,158
Commonwealth Edison Co [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	3	5	8
Commonwealth Edison Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	1,774	1,381	3,283	3,068
Commonwealth Edison Co [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	127	44	285	90
PECO Energy Co [Member]
Revenue, Major Customer [Line Items]
Revenues	828	816	1,940	1,863
PECO Energy Co [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	1	4	2
PECO Energy Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	827	812	1,938	1,849
PECO Energy Co [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	1	4	2	14
Baltimore Gas and Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenues	797	786	2,053	1,940
Baltimore Gas and Electric Company [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	3	4	10
Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	788	800	1,972	1,961
Baltimore Gas and Electric Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	9	(14)	81	(21)
Pepco Holdings LLC [Member]
Revenue, Major Customer [Line Items]
Revenues	1,305	1,221	2,841	2,626
Pepco Holdings LLC [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	2	4	6
Pepco Holdings LLC [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	1,293	1,236	2,760	2,646
Pepco Holdings LLC [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	12	(15)	81	(20)
Potomac Electric Power Company [Member]
Revenue, Major Customer [Line Items]
Revenues	642	581	1,351	1,195
Potomac Electric Power Company [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	2	3	2
Potomac Electric Power Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	633	581	1,300	1,201
Potomac Electric Power Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	9	0	51	(6)
Delmarva Power and Light Company [Member]
Revenue, Major Customer [Line Items]
Revenues	349	332	823	763
Delmarva Power and Light Company [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	2	3	3
Delmarva Power and Light Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	345	333	809	765
Delmarva Power and Light Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	4	(1)	14	(2)
Atlantic City Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenues	317	309	670	658
Atlantic City Electric Company [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	1	1	1	2
Atlantic City Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	318	324	654	670
Atlantic City Electric Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	(1)	(15)	16	(12)
Rate-regulated electric revenues [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,434	3,934	8,896	8,415
Rate-regulated electric revenues [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,556	3,938	9,264	8,460
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,781	1,387	3,293	3,075
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,774	1,381	3,283	3,068
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	3	5	8
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	9	9	15	15
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	861	819	1,698	1,675
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	461	312	823	736
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	205	11	290	165
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Public Authorities & Electric Railroads [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	13	5	22	20
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	234	234	450	472
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	723	707	1,521	1,441
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	719	704	1,514	1,436
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	1	1	3	2
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	5	4	10	7
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	444	431	963	918
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	132	126	267	237
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	64	72	129	136
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Public Authorities & Electric Railroads [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	8	7	16	15
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	71	68	139	130
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	670	642	1,449	1,377
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	667	639	1,443	1,373
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	1	2	2	3
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4	4	8	8
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	363	334	796	752
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	75	70	167	151
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	119	129	268	260
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Public Authorities & Electric Railroads [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	7	7	14	14
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	103	99	198	196
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,265	1,199	2,637	2,522
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,264	1,199	2,634	2,526
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	2	4	6
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	3	2	7	2
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	583	548	1,221	1,200
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	144	140	304	281
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	337	332	714	655
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Public Authorities & Electric Railroads [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	15	15	33	31
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	185	164	362	359
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	633	580	1,302	1,200
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	633	581	1,300	1,201
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	2	3	2
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	2	1	5	1
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	267	234	549	509
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	41	35	80	73
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	254	250	535	503
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Public Authorities & Electric Railroads [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	7	8	16	16
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	64	54	120	100
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	315	295	682	643
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	316	296	683	645
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	2	2	3	3
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1	1	2	1
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	161	155	371	362
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	57	51	119	107
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	33	30	66	56
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Public Authorities & Electric Railroads [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4	3	8	7
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	61	57	119	113
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	317	323	653	668
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	318	324	654	670
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	1	1	1	2
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	155	159	301	329
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	46	54	105	101
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	50	52	113	96
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Public Authorities & Electric Railroads [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4	4	9	8
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	63	55	126	136
Rate-regulated natural gas revenues [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	258	307	1,080	1,124
Rate-regulated natural gas revenues [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	262	301	1,116	1,106
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Transportation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	108	108	425	414
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	108	108	424	413
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	1	0	1	0
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1	0	2	1
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	69	71	292	289
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	32	29	107	105
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	1	0
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Transportation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	5	6	13	14
Rate-regulated natural gas revenues [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	2	2	11	5
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	121	161	530	585
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	121	161	529	588
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Related Party
Revenue, Major Customer [Line Items]
Revenues from Related Parties	1	1	2	7
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1	2	3	3
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	71	96	349	378
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	15	18	56	63
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	30	35	100	100
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Transportation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	5	12	24	47
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	29	37	126	120
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	29	37	126	120
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	16	17	76	68
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	7	8	33	29
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1	3	2	6
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Transportation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4	3	8	7
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1	6	7	10
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Transportation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	29	37	126	120
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	29	37	126	120
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	16	17	76	68
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	7	8	33	29
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1	3	2	6
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Transportation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4	3	8	7
Rate-regulated natural gas revenues [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1	6	7	10
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Residential [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Small Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Large Commercial & Industrial [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Transportation [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Rate-regulated natural gas revenues [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Other [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0	0	0	0
Alternative revenue programs [Member] \| Commonwealth Edison Co [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	118	35	270	75
Alternative revenue programs [Member] \| PECO Energy Co [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(5)	0	(10)	6
Alternative revenue programs [Member] \| Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4	(20)	70	(32)
Alternative revenue programs [Member] \| Pepco Holdings LLC [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	9	(17)	74	(22)
Alternative revenue programs [Member] \| Potomac Electric Power Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	7	(1)	46	(7)
Alternative revenue programs [Member] \| Delmarva Power and Light Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	3	(2)	12	(3)
Alternative revenue programs [Member] \| Atlantic City Electric Company [Member] \| Regulated Operation [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ (1)	$ (15)	$ 16	$ (12)

Accounts Receivable - Allowance

Accounts Receivable - Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			$ (46)	$ (96)
Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(1)	(29)
PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(19)	(21)
Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(4)	(18)
Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(22)	(29)
Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(13)	(16)
Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(3)	(6)
Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(6)	(7)
Customer accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 389	$ 389	327	320
Current period provision for expected credit losses	(35)	(9)	71	101
Writeoffs, net of recoveries	31	26	75	67
Ending balance	323	354	323	354
Customer accounts receivable \| Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	74	92	59	73
Current period provision for expected credit losses	(1)	(5)	21	21
Writeoffs, net of recoveries	6	6	13	13
Ending balance	67	81	67	81
Customer accounts receivable \| PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	130	125	105	105
Current period provision for expected credit losses	(20)	(10)	18	21
Writeoffs, net of recoveries	9	8	22	19
Ending balance	101	107	101	107
Customer accounts receivable \| Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	73	59	54	38
Current period provision for expected credit losses	(16)	2	14	28
Writeoffs, net of recoveries	7	4	18	9
Ending balance	50	57	50	57
Customer accounts receivable \| Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	112	113	109	104
Current period provision for expected credit losses	2	4	18	31
Writeoffs, net of recoveries	9	8	22	26
Ending balance	105	109	105	109
Customer accounts receivable \| Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	49	40	47	37
Current period provision for expected credit losses	4	5	13	16
Writeoffs, net of recoveries	3	3	10	11
Ending balance	50	42	50	42
Customer accounts receivable \| Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	26	24	21	18
Current period provision for expected credit losses	(3)	0	4	7
Writeoffs, net of recoveries	2	2	4	3
Ending balance	21	22	21	22
Customer accounts receivable \| Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	37	49	41	49
Current period provision for expected credit losses	1	(1)	1	8
Writeoffs, net of recoveries	4	3	8	12
Ending balance	34	45	34	45
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	91	81	82	72
Current period provision for expected credit losses	1	2	15	15
Writeoffs, net of recoveries	5	2	10	6
Ending balance	87	81	87	81
Other receivables \| Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	18	20	17	17
Current period provision for expected credit losses	1	(2)	3	2
Writeoffs, net of recoveries	1	0	2	1
Ending balance	18	18	18	18
Other receivables \| PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	11	9	9	7
Current period provision for expected credit losses	(2)	2	1	4
Writeoffs, net of recoveries	1	1	2	1
Ending balance	8	10	8	10
Other receivables \| Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	12	11	10	9
Current period provision for expected credit losses	(2)	1	2	4
Writeoffs, net of recoveries	2	1	4	2
Ending balance	8	11	8	11
Other receivables \| Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	50	41	46	39
Current period provision for expected credit losses	4	1	9	5
Writeoffs, net of recoveries	1	0	2	2
Ending balance	53	42	53	42
Other receivables \| Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	28	18	25	16
Current period provision for expected credit losses	3	2	6	4
Writeoffs, net of recoveries	0	0	0	0
Ending balance	31	20	31	20
Other receivables \| Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	8	9	7	8
Current period provision for expected credit losses	1	(1)	2	0
Writeoffs, net of recoveries	0	0	0	0
Ending balance	9	8	9	8
Other receivables \| Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	14	14	14	15
Current period provision for expected credit losses	0	0	1	1
Writeoffs, net of recoveries	1	0	2	2
Ending balance	$ 13	$ 14	$ 13	$ 14

Accounts Receivable - Unbilled

Accounts Receivable - Unbilled Customer Revenue (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	$ 789	$ 912
Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	329	223
PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	144	219
Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	116	247
Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	200	223
Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	96	103
Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	37	74
Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	$ 67	$ 46

Accounts Receivable - Purchases

Accounts Receivable - Purchases and Sales of Accounts Receivable (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	$ 1,979	$ 1,911
Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	445	456
PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	546	518
Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	420	391
Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	568	546
Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	371	342
Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	107	104
Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	$ 90	100
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 [Member]
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		6 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Aug. 16, 2022	Jun. 30, 2023
Income Tax Additional Narrative Information [Line Items]
Income Tax Credits and Adjustments		$ 15
Income Taxes Receivable, Current		17
Notes Payable, Current		8
Notes Payable, Noncurrent		524
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%
Atlantic City Electric Company [Member]
Income Tax Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(20)
PECO Energy Co [Member]
Income Tax Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		87
State and Local Jurisdiction [Member] \| Atlantic City Electric Company [Member]
Income Tax Additional Narrative Information [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit		14
Federal and State
Income Tax Additional Narrative Information [Line Items]
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount		67
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 40

Income Taxes - Reconciliation t

Income Taxes - Reconciliation to Effective Tax Rate (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 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	6.50%	(5.40%)	6.20%	9.90%
Plant basis differences	(4.80%)	(3.30%)	(4.30%)	(3.50%)
Excess deferred tax amortization	(7.40%)	(10.50%)	(6.70%)	(11.00%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(0.50%)	(0.40%)	(0.50%)	0.80%
Other	2.80%	7.70%	1.30%	4.70%
Effective income tax rate	17.50%	9%	16.90%	21.80%
Income Tax Credits and Adjustments			$ 15
Total transaction costs relating to the Separation			19
Current State and Local Tax Expense (Benefit)			43
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount			48
Federal and State
Increase (decrease) due to:
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount			67
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			40
UNITED STATES
Increase (decrease) due to:
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ 5
Indemnification Agreement
Increase (decrease) due to:
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount			$ 4
Commonwealth Edison Co [Member]
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%	7.90%	7.80%	7.90%
Plant basis differences	(0.60%)	(0.50%)	(0.40%)	(0.50%)
Excess deferred tax amortization	(5.60%)	(5.50%)	(5.60%)	(5.80%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(0.30%)	(0.30%)	(0.30%)	(0.30%)
Other	0%	0%	0.10%	0.10%
Effective income tax rate	22.20%	22.50%	22.50%	22.30%
PECO Energy Co [Member]
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%)	(0.60%)	(1.30%)	(0.30%)
Plant basis differences	(15.80%)	(11.00%)	(15.40%)	(11.20%)
Excess deferred tax amortization	(2.40%)	(3.10%)	(2.40%)	(3.20%)
Amortization of investment tax credit, including deferred taxes on basis difference	0%	0%	0%	0%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	0%	0%	0%	0%
Other	0.40%	0%	0%	0.30%
Effective income tax rate	2%	6.30%	1.90%	6.60%
Baltimore Gas and Electric Company [Member]
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	6.80%	2.10%	6.40%	2.30%
Plant basis differences	0.10%	(1.30%)	(0.60%)	(1.00%)
Excess deferred tax amortization	(5.30%)	(19.00%)	(5.40%)	(17.80%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(0.40%)	(1.50%)	(0.40%)	(0.60%)
Other	0.10%	1.40%	0.30%	0.30%
Effective income tax rate	22.20%	2.60%	21.20%	4.10%
Pepco Holdings LLC [Member]
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%	1.50%	6.10%	2.80%
Plant basis differences	(1.60%)	(1.70%)	(1.70%)	(1.70%)
Excess deferred tax amortization	(8.00%)	(19.20%)	(7.40%)	(18.30%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.10%)	(0.10%)	(0.10%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(0.90%)	(0.40%)	(0.60%)	(0.40%)
Other	(0.30%)	(0.10%)	0%	0.10%
Effective income tax rate	16.30%	1%	17.30%	3.40%
Potomac Electric Power Company [Member]
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	5.60%	(3.40%)	5.50%	(3.80%)
Plant basis differences	(2.60%)	(2.40%)	(2.60%)	(2.50%)
Excess deferred tax amortization	(9.90%)	(15.70%)	(9.10%)	(16.30%)
Amortization of investment tax credit, including deferred taxes on basis difference	0%	0%	0%	0%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(1.10%)	(0.40%)	(0.80%)	(0.40%)
Other	0.50%	(0.50%)	0.50%	(0.70%)
Effective income tax rate	13.50%	(1.40%)	14.50%	(2.70%)
Delmarva Power and Light Company [Member]
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	6.30%	7.20%	6.30%	6.50%
Plant basis differences	(1.10%)	(0.70%)	(1.00%)	(0.70%)
Excess deferred tax amortization	(9.90%)	(20.00%)	(9.20%)	(19.50%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.20%)	(0.10%)	(0.20%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(0.40%)	(0.40%)	(0.40%)	(0.30%)
Other	0.90%	1.80%	0.10%	0.40%
Effective income tax rate	16.70%	8.70%	16.70%	7.20%
Atlantic City Electric Company [Member]
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	7.10%	6.70%	6.90%	6.70%
Plant basis differences	0%	(1.00%)	(0.60%)	(1.20%)
Excess deferred tax amortization	(2.00%)	(24.50%)	(2.00%)	(22.90%)
Amortization of investment tax credit, including deferred taxes on basis difference	(0.10%)	(0.20%)	(0.10%)	(0.20%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(0.30%)	(0.40%)	(0.30%)	(0.30%)
Other	(0.70%)	(1.60%)	0.10%	(0.50%)
Effective income tax rate	25%	0%	25%	2.60%

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 148	$ 148
Income Taxes Receivable, Noncurrent	50
Pepco Holdings LLC [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	59	59
Atlantic City Electric Company [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 17	$ 17

Retirement Benefits - Narrative

Retirement Benefits - Narrative (Details) $ in Millions	6 Months Ended
Retirement Benefits - Narrative (Details) $ in Millions	Jun. 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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Amortization of:
Non-service net periodic benefit cost	$ (1)	$ 16	$ (2)	$ 33
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	38	58	77	119
Interest cost	144	110	289	220
Expected return on assets	(188)	(205)	(377)	(414)
Amortization of:
Prior service cost (credit)	0	1	1	2
Actuarial loss (gain)	43	73	84	149
Non-service net periodic benefit cost	37	37	74	76
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	10	12	20
Interest cost	26	19	51	38
Expected return on assets	(21)	(25)	(42)	(50)
Amortization of:
Prior service cost (credit)	(3)	(5)	(5)	(10)
Actuarial loss (gain)	(1)	4	(1)	8
Non-service net periodic benefit cost	$ 7	$ 3	$ 15	$ 6

Retirement Benefits - Allocated

Retirement Benefits - Allocated Portion of Pension and Postretirement Benefit Plan Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			$ 89	$ 86
Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	$ 44	$ 40	89	82
Commonwealth Edison Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			13	30
Commonwealth Edison Co [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	7	14	13	30
PECO Energy Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			(7)	(4)
PECO Energy Co [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	(4)	(2)	(7)	(4)
Baltimore Gas and Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			28	22
Baltimore Gas and Electric Company [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	14	11	28	22
Pepco Holdings LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			49	26
Pepco Holdings LLC [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	25	13	49	26
Potomac Electric Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			17	4
Potomac Electric Power Company [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	9	2	17	4
Delmarva Power and Light Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			9	2
Delmarva Power and Light Company [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	5	1	9	2
Atlantic City Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			7	6
Atlantic City Electric Company [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	$ 3	$ 3	$ 7	$ 6

Retirement Benefits - Defined C

Retirement Benefits - Defined Contribution Savings Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 26	$ 23	$ 47	$ 43
Commonwealth Edison Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	10	10	19	18
PECO Energy Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	4	3	7	6
Baltimore Gas and Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	3	3	5	5
Pepco Holdings LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	5	4	8	7
Potomac Electric Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	2	2
Delmarva Power and Light Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	2	2
Atlantic City Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 1	$ 1	$ 1	$ 1

Derivative Financial Instrume_2

Derivative Financial Instruments - Narrative (Details) MWh in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Jun. 30, 2012 MWh	Jun. 30, 2023 USD ($)	Jan. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (630)		$ (638)
Corporate, Non-Segment [Member] \| Notes Payable to Banks [Member]
Derivative [Line Items]
Debt Instrument, Face Amount		$ 2,500
Commonwealth Edison Co [Member]
Derivative [Line Items]
Long-term Purchase Commitment, Minimum Energy Volume Required \| MWh	1.3
PECO Energy Co [Member]
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		10%
Incremental Collateral For Loss Of Investment Grade Credit Rating		$ 21
Baltimore Gas and Electric Company [Member]
Derivative [Line Items]
Incremental Collateral For Loss Of Investment Grade Credit Rating		$ 37
Baltimore Gas and Electric Company [Member] \| Maximum [Member]
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		20%
Baltimore Gas and Electric Company [Member] \| Minimum [Member]
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		10%
Delmarva Power and Light Company [Member]
Derivative [Line Items]
Estimated Percent of Gas Purchases Being Hedged		50%
Incremental Collateral For Loss Of Investment Grade Credit Rating		$ 9
InterestRateSwapNotional5YR \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		260	$ 115	635
InterestRateSwapNotional10YR \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		260	115	635
Interest Rate Swap [Member] \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		520	230	1,270
Derivative, Cash Received on Hedge		10
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		1,850
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	Jun. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Mark-to-market derivative liabilities (current liabilities)	$ 31	$ 8
Derivative Liability, Noncurrent	109	83
Interest Rate Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Noncurrent	17	11
Derivative Asset	17	11
Mark-to-market derivative liabilities (current liabilities)	(7)	(3)
Derivative Liability, Noncurrent		(4)
Derivative Liability	(7)	(7)
Derivative, Fair Value, Net	10	4
Interest Rate Contract \| Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Noncurrent	12	6
Derivative Asset	12	6
Mark-to-market derivative liabilities (current liabilities)	0	0
Derivative Liability, Noncurrent		(4)
Derivative Liability	0	(4)
Derivative, Fair Value, Net	12	2
Interest Rate Contract \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Noncurrent	5	5
Derivative Asset	5	5
Mark-to-market derivative liabilities (current liabilities)	(7)	(3)
Derivative Liability, Noncurrent		0
Derivative Liability	(7)	(3)
Derivative, Fair Value, Net	$ (2)	$ 2

Derivative Financial Instrume_4

Derivative Financial Instruments - Summary of Notional Amounts of Outstanding Derivative Positions (Details) - Cash Flow Hedging - USD ($) $ in Millions	Jun. 30, 2023	Jan. 31, 2023	Dec. 31, 2022
InterestRateSwapNotional5YR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 260	$ 115	$ 635
InterestRateSwapNotional10YR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	260	115	635
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 520	$ 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	Jun. 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	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Derivatives		$ (4)	$ 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	$ (4)	(4)
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	(6)	(5)
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	$ 2	$ 1

Derivative Financial Instrume_7

Derivative Financial Instruments - Summary of Counterparty Collateral (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	$ 986	$ 1,155
External Counterparties \| Commodity Contract [Member] \| Collateral [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	108	297
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Commonwealth Edison Co [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	102	77
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Baltimore Gas and Electric Company [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	1	23
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Pepco Holdings LLC [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	6	197
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Potomac Electric Power Company [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	0	26
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Delmarva Power and Light Company [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	0	121
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| Atlantic City Electric Company [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	6	50
External Counterparties \| Commodity Contract [Member] \| Collateral [Member] \| PECO Energy Co [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other	$ 0	$ 0

Debt and Credit Agreements - Na

Debt and Credit Agreements - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jan. 10, 2023	Oct. 07, 2022
Corporate, Non-Segment [Member] \| ShortTermDebt03232017
Short-term Debt [Line Items]
Short-term Bank Loans and Notes Payable	$ 500
Corporate, Non-Segment [Member] \| ShortTermDebt03232017 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt Instrument, Interest Rate Terms	SOFR plus 0.90
Corporate, Non-Segment [Member] \| ShortTermDebt03142023
Short-term Debt [Line Items]
Short-term Bank Loans and Notes Payable	$ 300
Corporate, Non-Segment [Member] \| ShortTermDebt03242023
Short-term Debt [Line Items]
Short-term Bank Loans and Notes Payable	200
Commonwealth Edison Co [Member] \| ShortTermDebtSOFRplus075Oct2023
Short-term Debt [Line Items]
Short-term Bank Loans and Notes Payable	$ 150
Commonwealth Edison Co [Member] \| ShortTermDebtSOFRplus075Oct2023 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt Instrument, Interest Rate Terms	SOFR plus 0.75
Commonwealth Edison Co [Member] \| FMB490Feb2033 \| First Mortgage [Member]
Short-term Debt [Line Items]
Debt Instrument, Face Amount		$ 400
Commonwealth Edison Co [Member] \| FMB530Feb2053 \| First Mortgage [Member]
Short-term Debt [Line Items]
Debt Instrument, Face Amount		$ 575
Commonwealth Edison Co [Member] \| ShortTermDebtSOFRplus100May72024
Short-term Debt [Line Items]
Short-term Bank Loans and Notes Payable	$ 400
Commonwealth Edison Co [Member] \| ShortTermDebtSOFRplus100May72024 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt Instrument, Interest Rate Terms	SOFR plus 1.00%
Revolving Credit Facility [Member] \| Corporate, Non-Segment [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	$ 0
Line of Credit Facility, Maximum Borrowing Capacity	900
Revolving Credit Facility [Member] \| Commonwealth Edison Co [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	0
Line of Credit Facility, Maximum Borrowing Capacity	1,000
Revolving Credit Facility [Member] \| PECO Energy Co [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	0
Line of Credit Facility, Maximum Borrowing Capacity	600
Revolving Credit Facility [Member] \| Baltimore Gas and Electric Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	0
Line of Credit Facility, Maximum Borrowing Capacity	600
Revolving Credit Facility [Member] \| Potomac Electric Power Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	0
Line of Credit Facility, Maximum Borrowing Capacity	300
Revolving Credit Facility [Member] \| Delmarva Power and Light Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	0
Line of Credit Facility, Maximum Borrowing Capacity	300
Revolving Credit Facility [Member] \| Atlantic City Electric Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	0
Line of Credit Facility, Maximum Borrowing Capacity	$ 300
Letter of Credit \| Commonwealth Edison Co [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 40
Letter of Credit \| PECO Energy Co [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			40
Letter of Credit \| Baltimore Gas and Electric Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			15
Letter of Credit \| Potomac Electric Power Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			15
Letter of Credit \| Delmarva Power and Light Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			15
Letter of Credit \| Atlantic City Electric Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 15

Debt and Credit Agreements - Co

Debt and Credit Agreements - Commercial Paper Borrowings (Details) - Commercial Paper [Member] - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Short-term Debt [Line Items]
Commercial Paper	$ 336	$ 1,938
Short-term Debt, Weighted Average Interest Rate, at Point in Time	5.23%	4.77%
Corporate [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 2	$ 449
Commonwealth Edison Co [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 297	$ 427
Short-term Debt, Weighted Average Interest Rate, at Point in Time	5.22%	4.71%
PECO Energy Co [Member]
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 [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 0	$ 409
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0%	4.81%
Pepco Holdings LLC [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 37	$ 414
Short-term Debt, Weighted Average Interest Rate, at Point in Time	5.32%	4.78%
Potomac Electric Power Company [Member]
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 [Member]
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 [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 37	$ 0
Short-term Debt, Weighted Average Interest Rate, at Point in Time	5.32%	0%

Debt and Credit Agreements - Su

Debt and Credit Agreements - Summary of Revolving Credit Agreements (Details) - Revolving Credit Facility [Member] $ in Millions	Jun. 30, 2023 USD ($)
Commonwealth Edison Co [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000
Commonwealth Edison Co [Member] \| 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 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 600
PECO Energy Co [Member] \| 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 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 600
Baltimore Gas and Electric Company [Member] \| 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 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 300
Potomac Electric Power Company [Member] \| 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 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 300
Delmarva Power and Light Company [Member] \| 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 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 300
Atlantic City Electric Company [Member] \| 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 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 900
Corporate, Non-Segment [Member] \| 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 - Is

Debt and Credit Agreements - Issuance of Long-Term Debt (Details) $ in Millions	Jun. 30, 2023 USD ($)
Corporate [Member] \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 2,500
Corporate [Member] \| Notes515Mar2028 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate	5.15%
Debt Instrument, Face Amount	$ 1,000
Corporate [Member] \| Notes530Mar2033 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt Instrument, Face Amount	$ 850
Corporate [Member] \| Note560Mar2053 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate	5.60%
Debt Instrument, Face Amount	$ 650
Commonwealth Edison Co [Member] \| ComEdFMB490Feb2033 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	4.90%
Debt Instrument, Face Amount	$ 400
Commonwealth Edison Co [Member] \| FMB530Feb2053 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt Instrument, Face Amount	$ 575
PECO Energy Co [Member] \| PECOFMB575M \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	4.90%
Debt Instrument, Face Amount	$ 575
Baltimore Gas and Electric Company [Member] \| SeniorNotes540June2053 \| Senior Notes [Member]
Debt Instrument [Line Items]
Interest Rate	5.40%
Debt Instrument, Face Amount	$ 700
Potomac Electric Power Company [Member] \| PepcoFMB5.30Mar2033 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt Instrument, Face Amount	$ 85
Potomac Electric Power Company [Member] \| FMB540Feb2038 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.40%
Debt Instrument, Face Amount	$ 40
Potomac Electric Power Company [Member] \| PepcoFMB557Mar2053 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.57%
Debt Instrument, Face Amount	$ 125
Potomac Electric Power Company [Member] \| FMB535Sept2033 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.35%
Debt Instrument, Face Amount	$ 100
Delmarva Power and Light Company [Member] \| DPLFMB530Mar2033 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.30%
Debt Instrument, Face Amount	$ 60
Delmarva Power and Light Company [Member] \| DPLFMB557Mar2053 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.57%
Debt Instrument, Face Amount	$ 65
Delmarva Power and Light Company [Member] \| DPLFMB545Nov2033 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.45%
Debt Instrument, Face Amount	$ 340
Delmarva Power and Light Company [Member] \| DPLFMB555Nov2038 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.55%
Debt Instrument, Face Amount	$ 75
Delmarva Power and Light Company [Member] \| DPLFMB572Nov2053 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate	5.72%
Debt Instrument, Face Amount	$ 110
Atlantic City Electric Company [Member] \| ACEFMB557Mar2053 \| First Mortgage Bonds [Member]
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	Jun. 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)	$ 40,997	$ 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)	36,266	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	392	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
Long-term debt to Financing Trusts	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)	33,514	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)	2,752	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	392	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 [Member] \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	11,482	10,518
Commonwealth Edison Co [Member] \| 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 [Member] \| 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)	10,015	9,006
Commonwealth Edison Co [Member] \| Estimate of Fair Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to Financing Trusts	207	204
Commonwealth Edison Co [Member] \| 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
Long-term debt to Financing Trusts	0	0
Commonwealth Edison Co [Member] \| 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 [Member] \| 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)	10,015	9,006
Commonwealth Edison Co [Member] \| 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 [Member] \| 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 [Member] \| 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	207	204
Commonwealth Edison Co [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to Financing Trusts	205	205
PECO Energy Co [Member] \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	5,132	4,612
PECO Energy Co [Member] \| 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 [Member] \| 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)	4,426	3,914
PECO Energy Co [Member] \| Estimate of Fair Value Measurement [Member] \| Related Party
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt to Financing Trusts	185	180
PECO Energy Co [Member] \| 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
Long-term debt to Financing Trusts	0	0
PECO Energy Co [Member] \| 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 [Member] \| 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)	4,426	3,864
PECO Energy Co [Member] \| 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 [Member] \| 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 [Member] \| 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	185	180
PECO Energy Co [Member] \| 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 [Member] \| 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 [Member] \| 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)	4,029	3,613
Baltimore Gas and Electric Company [Member] \| 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 [Member] \| 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)	4,029	3,613
Baltimore Gas and Electric Company [Member] \| 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 [Member] \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	8,550	8,120
Pepco Holdings LLC [Member] \| 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)	7,287	6,784
Pepco Holdings LLC [Member] \| 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 [Member] \| 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)	4,535	4,507
Pepco Holdings LLC [Member] \| 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)	2,752	2,277
Potomac Electric Power Company [Member] \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	3,998	3,751
Potomac Electric Power Company [Member] \| 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)	3,709	3,434
Potomac Electric Power Company [Member] \| 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 [Member] \| 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)	2,240	2,229
Potomac Electric Power Company [Member] \| 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)	1,469	1,205
Delmarva Power and Light Company [Member] \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	2,061	1,938
Delmarva Power and Light Company [Member] \| 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)	1,757	1,622
Delmarva Power and Light Company [Member] \| 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 [Member] \| 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)	1,168	1,164
Delmarva Power and Light Company [Member] \| 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)	589	458
Atlantic City Electric Company [Member] \| Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt (including amounts due within one year)	1,834	1,757
Atlantic City Electric Company [Member] \| 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)	1,608	1,523
Atlantic City Electric Company [Member] \| 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 [Member] \| 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)	914	909
Atlantic City Electric Company [Member] \| 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)	$ 694	$ 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	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities (current liabilities)	$ 31	$ 8
Derivative Liability, Noncurrent	109	83
Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	702	664
Assets, Fair Value Disclosure	942	891
Deferred Compensation Liability, Current and Noncurrent	(74)	(75)
Total Liabilities	(214)	(166)
Fair Value, Net Asset (Liability)	728	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	(133)	(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	(7)	(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	(7)	(7)
Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	225	345
Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	108	81
Fair Value, Recurring [Member] \| Other Assets [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	201	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	223	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	50	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	100	98
Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	12	6
Fair Value, Recurring [Member] \| Economic Hedges
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	5	5
Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	17	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	702	664
Assets, Fair Value Disclosure	818	775
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	818	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	116	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	50	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	82	76
Deferred Compensation Liability, Current and Noncurrent	(74)	(75)
Total Liabilities	(81)	(82)
Fair Value, Net Asset (Liability)	1	(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	(7)	(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	(7)	(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	65	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	58	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	12	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	5	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	17	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	(133)	(84)
Fair Value, Net Asset (Liability)	(91)	(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	(133)	(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 [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities (current liabilities)	24	5
Derivative Liability, Noncurrent	109	79
Commonwealth Edison Co [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	484	392
Assets, Fair Value Disclosure	484	392
Total mark-to-market derivative liabilities	(133)	(84)
Deferred Compensation Liability, Current and Noncurrent	(7)	(8)
Total Liabilities	(140)	(92)
Fair Value, Net Asset (Liability)	344	300
Mark-to-market derivative liabilities (current liabilities)	(24)	5	$ 0
Derivative Liability, Noncurrent	(109)	79	$ (103)
Commonwealth Edison Co [Member] \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	50	42
Commonwealth Edison Co [Member] \| Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	102	77
Commonwealth Edison Co [Member] \| Fair Value, Recurring [Member] \| Other Assets [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	201	117
Commonwealth Edison Co [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 [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 [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 [Member] \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	484	392
Assets, Fair Value Disclosure	484	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)	484	392
Commonwealth Edison Co [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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	(133)	(84)
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	(133)	(84)
Fair Value, Net Asset (Liability)	(133)	(84)
Commonwealth Edison Co [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	69	10
Assets, Fair Value Disclosure	94	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)	86	25
PECO Energy Co [Member] \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	22	58
PECO Energy Co [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	25	22
PECO Energy Co [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 [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	16	15
PECO Energy Co [Member] \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	69	10
Assets, Fair Value Disclosure	78	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)	78	17
PECO Energy Co [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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	16	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)	8	8
PECO Energy Co [Member] \| 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	16	15
PECO Energy Co [Member] \| 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 [Member] \| 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	16	15
PECO Energy Co [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	76	23
Assets, Fair Value Disclosure	85	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)	81	26
Baltimore Gas and Electric Company [Member] \| 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 [Member] \| 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 [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 [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 [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 [Member] \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	76	23
Assets, Fair Value Disclosure	85	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)	85	30
Baltimore Gas and Electric Company [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	30	205
Assets, Fair Value Disclosure	171	343
Deferred Compensation Liability, Current and Noncurrent	(13)	(14)
Total Liabilities	(13)	(14)
Fair Value, Net Asset (Liability)	158	329
Pepco Holdings LLC [Member] \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	101	165
Pepco Holdings LLC [Member] \| Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	5	3
Pepco Holdings LLC [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	141	138
Pepco Holdings LLC [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 [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	11
Pepco Holdings LLC [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 [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	62	61
Pepco Holdings LLC [Member] \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	30	205
Assets, Fair Value Disclosure	102	275
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	102	275
Pepco Holdings LLC [Member] \| 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	72	70
Pepco Holdings LLC [Member] \| 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 [Member] \| 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	11
Pepco Holdings LLC [Member] \| 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 [Member] \| 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 [Member] \| 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	27	29
Deferred Compensation Liability, Current and Noncurrent	(13)	(14)
Total Liabilities	(13)	(14)
Fair Value, Net Asset (Liability)	14	15
Pepco Holdings LLC [Member] \| 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	27	29
Pepco Holdings LLC [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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	20	22
Pepco Holdings LLC [Member] \| 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	39
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	42	39
Pepco Holdings LLC [Member] \| 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	39
Pepco Holdings LLC [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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	39
Pepco Holdings LLC [Member] \| 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 [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	146	170
Deferred Compensation Liability, Current and Noncurrent	(1)	(1)
Total Liabilities	(1)	(1)
Fair Value, Net Asset (Liability)	145	169
Potomac Electric Power Company [Member] \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	15	45
Potomac Electric Power Company [Member] \| Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	5	3
Potomac Electric Power Company [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	124	119
Potomac Electric Power Company [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 [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	62	60
Potomac Electric Power Company [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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	20	22
Deferred Compensation Liability, Current and Noncurrent	(1)	(1)
Total Liabilities	(1)	(1)
Fair Value, Net Asset (Liability)	19	21
Potomac Electric Power Company [Member] \| 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	20	22
Potomac Electric Power Company [Member] \| 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 [Member] \| 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	20	22
Potomac Electric Power Company [Member] \| 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	38
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	42	38
Potomac Electric Power Company [Member] \| 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	38
Potomac Electric Power Company [Member] \| 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 [Member] \| 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	38
Potomac Electric Power Company [Member] \| 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 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	121
Assets, Fair Value Disclosure	0	121
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	0	121
Delmarva Power and Light Company [Member] \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	18	31
Delmarva Power and Light Company [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 [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 [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 [Member] \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	121
Assets, Fair Value Disclosure	0	121
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	0	121
Delmarva Power and Light Company [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [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 [Member] \| Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	23	71
Atlantic City Electric Company [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 [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 [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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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 [Member] \| 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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 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)	$ 31		$ 31		$ 8
Derivative Liability, Noncurrent	109		109		83
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	(57)	$ (107)	(44)	$ (182)
Total realized / unrealized gains (losses)
Included in net income(a)	1	1	2	2
Included in regulatory assets/liabilities	(35)	56	(49)	131
Purchases, sales, issuances and settlements
Transfers out of Level 3				(1)
Ending Balance	(91)	(50)	(91)	(50)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	1	1	2	2
Commonwealth Edison Co [Member]
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Mark-to-market derivative liabilities (current liabilities)	24		24		5
Derivative Liability, Noncurrent	109		109		79
Commonwealth Edison Co [Member] \| 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)	(24)	0	(24)	0	5
Derivative Liability, Noncurrent	(109)	(103)	(109)	(103)	$ 79
Mark-to-market derivative assets, current		15		15
Commonwealth Edison Co [Member] \| 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)	8	(3)	19	3
Commonwealth Edison Co [Member] \| Fair Value, Inputs, Level 3 [Member] \| Derivative [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	(98)	(144)	(84)	(219)
Total realized / unrealized gains (losses)
Included in net income(a)	0	0	0	0
Included in regulatory assets/liabilities	(35)	56	(49)	131
Purchases, sales, issuances and settlements
Transfers out of Level 3				0
Ending Balance	(133)	(88)	(133)	(88)
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)	43	(59)	68	(128)
Pepco Holdings LLC [Member] \| 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	41	36	40	35
Total realized / unrealized gains (losses)
Included in net income(a)	1	1	2	2
Included in regulatory assets/liabilities	0	0	0	0
Purchases, sales, issuances and settlements
Transfers out of Level 3				0
Ending Balance	42	37	42	37
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	1	1	2	2
Potomac Electric Power Company [Member] \| 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	41	36	40	35
Total realized / unrealized gains (losses)
Included in net income(a)	1	1	2	2
Included in regulatory assets/liabilities	0	0	0	0
Purchases, sales, issuances and settlements
Transfers out of Level 3				0
Ending Balance	42	37	42	37
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	$ 1	$ 1	$ 2	$ 2

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 ($)	Jun. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ (133,000,000)	$ (84,000,000)
Discounted Cash Flow [Member] \| Minimum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	25.56	34.78
Discounted Cash Flow [Member] \| Maximum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	75.64	75.71
Discounted Cash Flow [Member] \| Arithmetic Average [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	43.03	48.44
Commonwealth Edison Co [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ (133,000,000)	$ (84,000,000)
Commonwealth Edison Co [Member] \| Discounted Cash Flow [Member] \| Minimum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	25.56	34.78
Commonwealth Edison Co [Member] \| Discounted Cash Flow [Member] \| Maximum [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	75.64	75.71
Commonwealth Edison Co [Member] \| Discounted Cash Flow [Member] \| Arithmetic Average [Member]
Derivatives, Fair Value [Line Items]
Fair Value Inputs Forward Power Price	43.03	48.44

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) $ in Millions	1 Months Ended
	Nov. 30, 2020 USD ($)	Jun. 30, 2023 USD ($) MGPSite
Commonwealth Edison Co [Member]
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
Commonwealth Edison Co [Member] \| Illinois Chamber of Commerce
Commitments And Contingencies Additional Narrative Information [Line Items]
Customer Refund Liability, Current		$ 31
PECO Energy Co [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Mgp Site Contingency Monitoring Count \| MGPSite		6
Baltimore Gas and Electric Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Mgp Site Contingency Monitoring Count \| MGPSite		4
Delmarva Power and Light Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Mgp Site Contingency Count \| MGPSite		1
Exelon Business Services Co Affiliate [Member]
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	Jun. 30, 2023 USD ($)
Other Commitments [Line Items]
Other Commitment	$ 634
Pepco Holdings LLC [Member]
Other Commitments [Line Items]
Other Commitment	126
Potomac Electric Power Company [Member]
Other Commitments [Line Items]
Other Commitment	95
Delmarva Power and Light Company [Member]
Other Commitments [Line Items]
Other Commitment	19
Atlantic City Electric Company [Member]
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	44
Pepco Holdings Inc [Member] \| Pepco Holdings LLC [Member]
Other Commitments [Line Items]
Other Commitment	320
Pepco Holdings Inc [Member] \| Pepco Holdings LLC [Member] \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	40
Pepco Holdings Inc [Member] \| Potomac Electric Power Company [Member]
Other Commitments [Line Items]
Other Commitment	120
Pepco Holdings Inc [Member] \| Potomac Electric Power Company [Member] \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	35
Pepco Holdings Inc [Member] \| Delmarva Power and Light Company [Member]
Other Commitments [Line Items]
Other Commitment	89
Pepco Holdings Inc [Member] \| Delmarva Power and Light Company [Member] \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	3
Pepco Holdings Inc [Member] \| Atlantic City Electric Company [Member]
Other Commitments [Line Items]
Other Commitment	111
Pepco Holdings Inc [Member] \| Atlantic City Electric Company [Member] \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	$ 2

Commitments and Contingencies_4

Commitments and Contingencies - Schedule of Commercial Commitments (Details) $ in Millions	Jun. 30, 2023 USD ($)
Other Commitments [Line Items]
Other Commitment	$ 634
Other Commitment, to be Paid, Remainder of Fiscal Year	185
Other Commitment, to be Paid, Year One	46
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	65
Letters of Credit
Other Commitments [Line Items]
Other Commitment	21
Other Commitment, to be Paid, Remainder of Fiscal Year	13
Other Commitment, to be Paid, Year One	8
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	206
Other Commitment, to be Paid, Remainder of Fiscal Year	172
Other Commitment, to be Paid, Year One	34
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 [Member]
Other Commitments [Line Items]
Other Commitment	258
Other Commitment, to be Paid, Remainder of Fiscal Year	48
Other Commitment, to be Paid, Year One	10
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 [Member] \| Letters of Credit
Other Commitments [Line Items]
Other Commitment	12
Other Commitment, to be Paid, Remainder of Fiscal Year	9
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
Commonwealth Edison Co [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	46
Other Commitment, to be Paid, Remainder of Fiscal Year	39
Other Commitment, to be Paid, Year One	7
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 [Member] \| 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 [Member]
Other Commitments [Line Items]
Other Commitment	181
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	178
PECO Energy Co [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	2
Other Commitment, to be Paid, Remainder of Fiscal Year	1
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, Year Five and Beyond	0
PECO Energy Co [Member] \| 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 [Member] \| 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 [Member]
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 [Member] \| 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 [Member] \| 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 [Member]
Other Commitments [Line Items]
Other Commitment	126
Other Commitment, to be Paid, Remainder of Fiscal Year	77
Other Commitment, to be Paid, Year One	24
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	65
Pepco Holdings LLC [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	97
Other Commitment, to be Paid, Remainder of Fiscal Year	77
Other Commitment, to be Paid, Year One	20
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 [Member] \| 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 [Member]
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 [Member] \| 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 [Member] \| 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 [Member]
Other Commitments [Line Items]
Other Commitment	19
Other Commitment, to be Paid, Remainder of Fiscal Year	3
Other Commitment, to be Paid, Year One	6
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	27
Delmarva Power and Light Company [Member] \| Surety Bonds
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
Delmarva Power and Light Company [Member] \| 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 [Member]
Other Commitments [Line Items]
Other Commitment	12
Other Commitment, to be Paid, Remainder of Fiscal Year	3
Other Commitment, to be Paid, Year One	3
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	16
Atlantic City Electric Company [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	5
Other Commitment, to be Paid, Remainder of Fiscal Year	3
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
Atlantic City Electric Company [Member] \| 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	Jun. 30, 2023	Dec. 31, 2022
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	$ 423	$ 409
Commonwealth Edison Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	304	325
PECO Energy Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	24	25
Baltimore Gas and Electric Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	9	9
Pepco Holdings LLC [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	82	46
Potomac Electric Power Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	80	44
Delmarva Power and Light Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	1	1
Atlantic City Electric Company [Member]
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	334	355
Accrual For MGP Investigation And Remediation [Member] \| Commonwealth Edison Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	303	324
Accrual For MGP Investigation And Remediation [Member] \| PECO Energy Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	23	23
Accrual For MGP Investigation And Remediation [Member] \| Baltimore Gas and Electric Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	8	8
Accrual For MGP Investigation And Remediation [Member] \| Pepco Holdings LLC [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	0	0
Accrual For MGP Investigation And Remediation [Member] \| Potomac Electric Power Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	0	0
Accrual For MGP Investigation And Remediation [Member] \| Delmarva Power and Light Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	0	0
Accrual For MGP Investigation And Remediation [Member] \| Atlantic City Electric Company [Member]
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 [Member]
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				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 25,066	$ 24,744	$ 23,491	$ 34,795	$ 24,744	$ 34,795
Other comprehensive income (loss), net of income taxes	9	(1)	12	14	8	26
Ending balance	25,079	25,066	23,656	23,491	25,079	23,656
Gains (Losses) on Cash Flow Hedges
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	8	2	0	(6)	2	(6)
OCI before reclassifications	9		0		15	0
Amounts reclassified from AOCI	0		0		0	0
Other comprehensive income (loss), net of income taxes	9		0		15	0
Ending balance	17	8	0	0	17	0
Gains (Losses) on Cash Flow Hedges \| Exelon Generation Co L L C [Member]
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)	(640)	(713)	(2,721)	(640)	(2,721)
OCI before reclassifications	(3)		2		(13)	2
Amounts reclassified from AOCI	3		10		6	24
Other comprehensive income (loss), net of income taxes	0		12		(7)	26
Ending balance	(647)	(647)	(701)	(713)	(647)	(701)
Pension and Non-Pension Postretirement Benefit Plan Items \| Exelon Generation Co L L C [Member]
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	(23)	0	(23)
OCI before reclassifications	0		0		0	0
Amounts reclassified from AOCI	0		0		0	0
Other comprehensive income (loss), net of income taxes	0		0		0	0
Ending balance	0	0	0	0	0	0
Foreign Currency Items \| Exelon Generation Co L L C [Member]
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	(639)	(638)	(713)	(2,750)	(638)	(2,750)
OCI before reclassifications	6		2		2	2
Amounts reclassified from AOCI	3		10		6	24
Other comprehensive income (loss), net of income taxes	9	(1)	12	14	8	26
Ending balance	$ (630)	$ (639)	$ (701)	$ (713)	$ (630)	(701)
Total \| Exelon Generation Co L L C [Member]
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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	$ (1)	$ (3)	$ (2)	$ (8)
Pension and Non-Pension Postretirement Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	1	(1)	4	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	$ (3)	$ 0	$ (4)	$ 0

Supplemental Financial Inform_3

Supplemental Financial Information - Taxes Other Than Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Supplemental Statement of Operations Information [Line Items]
Utility taxes	$ 201	$ 203	$ 421	$ 424
Property	96	94	196	188
Payroll	31	28	63	64
Commonwealth Edison Co [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	71	71	146	149
Property	8	10	18	20
Payroll	7	7	14	13
PECO Energy Co [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	38	39	78	77
Property	4	4	8	9
Payroll	4	5	9	8
Baltimore Gas and Electric Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	22	20	50	47
Property	49	46	100	92
Payroll	5	4	9	9
Pepco Holdings LLC [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	70	73	147	151
Property	35	33	70	67
Payroll	7	7	14	14
Potomac Electric Power Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	63	67	131	137
Property	24	23	48	46
Payroll	2	1	4	3
Delmarva Power and Light Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	6	5	14	12
Property	10	10	21	20
Payroll	1	1	2	2
Atlantic City Electric Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	1	1	2	2
Property	1	0	1	1
Payroll	$ 1	$ 1	$ 2	$ 2

Supplemental Financial Inform_4

Supplemental Financial Information - Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other, Net [Abstract]
AFUDC - Equity	$ 34	$ 38	$ 71	$ 74
Non-service net periodic benefit cost	(1)	16	(2)	33
Commonwealth Edison Co [Member]
Other, Net [Abstract]
AFUDC - Equity	7	9	17	17
Non-service net periodic benefit cost	0	0	0	0
PECO Energy Co [Member]
Other, Net [Abstract]
AFUDC - Equity	6	8	12	15
Non-service net periodic benefit cost	0	0	0	0
Baltimore Gas and Electric Company [Member]
Other, Net [Abstract]
AFUDC - Equity	4	6	7	12
Non-service net periodic benefit cost	0	0	0	0
Pepco Holdings LLC [Member]
Other, Net [Abstract]
AFUDC - Equity	17	15	35	30
Non-service net periodic benefit cost	0	0	0	0
Potomac Electric Power Company [Member]
Other, Net [Abstract]
AFUDC - Equity	13	11	27	22
Non-service net periodic benefit cost	0	0	0	0
Delmarva Power and Light Company [Member]
Other, Net [Abstract]
AFUDC - Equity	2	2	4	4
Non-service net periodic benefit cost	0	0	0	0
Atlantic City Electric Company [Member]
Other, Net [Abstract]
AFUDC - Equity	2	2	4	4
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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			$ 1,370	$ 1,376
Amortization of regulatory assets			352	357
Amortization of intangible assets, net			4	8
Amortization of energy contract assets and liabilities				3
Nuclear fuel				66
ARO accretion			1	44
Depreciation, Amortization and Accretion, Net			1,727	1,854
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			89	86
Allowance for credit losses			46	96
Other decommissioning-related activity				36
Energy-related options				60
True-up adjustments to decoupling mechanisms and formula rates	$ 126	$ (2)	404	27
Long-term incentive plan			13	40
Amortization of operating ROU asset			19	38
Change in environmental liabilities			37
AFUDC - Equity	(34)	(38)	(71)	(74)
Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(410)	(27)
Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(71)	(74)
Commonwealth Edison Co [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			540	511
Amortization of regulatory assets			148	138
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			688	649
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			13	30
Allowance for credit losses			1	29
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	118	35	270	75
Long-term incentive plan			0	0
Amortization of operating ROU asset			1	1
Change in environmental liabilities			0
AFUDC - Equity	(7)	(9)	(17)	(17)
Commonwealth Edison Co [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(270)	(75)
Commonwealth Edison Co [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(17)	(17)
PECO Energy Co [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			190	177
Amortization of regulatory assets			7	8
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			197	185
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			(7)	(4)
Allowance for credit losses			19	21
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	(5)	0	(10)	6
Long-term incentive plan			0	0
Amortization of operating ROU asset			0	0
Change in environmental liabilities			0
AFUDC - Equity	(6)	(8)	(12)	(15)
PECO Energy Co [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			10	(6)
PECO Energy Co [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(12)	(15)
Baltimore Gas and Electric Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			249	235
Amortization of regulatory assets			76	87
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			325	322
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			28	22
Allowance for credit losses			4	18
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	4	(20)	70	(32)
Long-term incentive plan			0	0
Amortization of operating ROU asset			2	14
Change in environmental liabilities			0
AFUDC - Equity	(4)	(6)	(7)	(12)
Baltimore Gas and Electric Company [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(70)	32
Baltimore Gas and Electric Company [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(7)	(12)
Pepco Holdings LLC [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			364	335
Amortization of regulatory assets			120	124
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			484	459
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			49	26
Allowance for credit losses			22	29
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	9	(17)	74	(22)
Long-term incentive plan			0	0
Amortization of operating ROU asset			14	14
Change in environmental liabilities			37
AFUDC - Equity	(17)	(15)	(35)	(30)
Pepco Holdings LLC [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(80)	22
Pepco Holdings LLC [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(35)	(30)
Potomac Electric Power Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			152	145
Amortization of regulatory assets			64	68
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			216	213
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			17	4
Allowance for credit losses			13	16
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	7	(1)	46	(7)
Long-term incentive plan			0	0
Amortization of operating ROU asset			2	4
Change in environmental liabilities			37
AFUDC - Equity	(13)	(11)	(27)	(22)
Potomac Electric Power Company [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(46)	7
Potomac Electric Power Company [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(27)	(22)
Delmarva Power and Light Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			104	92
Amortization of regulatory assets			17	21
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			121	113
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			9	2
Allowance for credit losses			3	6
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	3	(2)	12	(3)
Long-term incentive plan			0	0
Amortization of operating ROU asset			4	4
Change in environmental liabilities			0
AFUDC - Equity	(2)	(2)	(4)	(4)
Delmarva Power and Light Company [Member] \| 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 [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(4)	(4)
Atlantic City Electric Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			96	83
Amortization of regulatory assets			39	35
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities				0
Nuclear fuel				0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			135	118
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			7	6
Allowance for credit losses			6	7
Other decommissioning-related activity				0
Energy-related options				0
True-up adjustments to decoupling mechanisms and formula rates	(1)	(15)	16	(12)
Long-term incentive plan			0	0
Amortization of operating ROU asset			2	2
Change in environmental liabilities			0
AFUDC - Equity	$ (2)	$ (2)	(4)	(4)
Atlantic City Electric Company [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(19)	12
Atlantic City Electric Company [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			$ (4)	$ (4)

Supplemental Financial Inform_6

Supplemental Financial Information - Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 399	$ 407	$ 816	$ 672
Restricted cash	435	566	961	321
Restricted cash included in other long-term assets	201	117	59	44
Cash, restricted cash, and cash equivalents - Held for Sale				582
Total cash, restricted cash, and cash equivalents	1,035	1,090	1,836	1,619
Accrued Expenses [Abstract]
Compensation-related accruals	467	613
Taxes accrued	179	211
Interest accrued	423	338
Commonwealth Edison Co [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	74	67	120	131
Restricted cash	361	327	384	210
Restricted cash included in other long-term assets	201	117	59	43
Cash, restricted cash, and cash equivalents - Held for Sale				0
Total cash, restricted cash, and cash equivalents	636	511	563	384
Accrued Expenses [Abstract]
Compensation-related accruals	121	179
Taxes accrued	101	92
Interest accrued	151	124
PECO Energy Co [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	82	59	23	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	91	68	32	44
Accrued Expenses [Abstract]
Compensation-related accruals	65	81
Taxes accrued	40	10
Interest accrued	48	47
Baltimore Gas and Electric Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	89	43	354	51
Restricted cash	1	24	205	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	90	67	559	55
Accrued Expenses [Abstract]
Compensation-related accruals	59	79
Taxes accrued	33	34
Interest accrued	43	42
Pepco Holdings LLC [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	110	198	278	136
Restricted cash	26	175	341	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	136	373	619	213
Accrued Expenses [Abstract]
Compensation-related accruals	88	104
Taxes accrued	75	70
Interest accrued	69	61
Potomac Electric Power Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	16	45	14	34
Restricted cash	26	54	117	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	42	99	131	68
Accrued Expenses [Abstract]
Compensation-related accruals	26	29
Taxes accrued	52	52
Interest accrued	37	32
Delmarva Power and Light Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	18	31	26	28
Restricted cash	0	121	223	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	18	152	249	71
Accrued Expenses [Abstract]
Compensation-related accruals	17	20
Taxes accrued	13	8
Interest accrued	12	9
Atlantic City Electric Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	24	72	233	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	24	72	$ 233	$ 29
Accrued Expenses [Abstract]
Compensation-related accruals	14	16
Taxes accrued	8	12
Interest accrued	$ 15	$ 14

Related Party Transactions - Ut

Related Party Transactions - Utility Registrants' expense with Generation (Details) - Exelon Generation Co L L C [Member] $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenues from Related Parties	$ 59
PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenues from Related Parties	33
Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Revenues from Related Parties	18
Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Revenues from Related Parties	51
Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenues from Related Parties	39
Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenues from Related Parties	10
Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenues from Related Parties	$ 2

Related Party Transactions - BS

Related Party Transactions - BSC and PHISCO Service Companies (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	$ 165	$ 139	$ 340	$ 344
PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	25	21	49	40
Commonwealth Edison Co [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	78	67	159	152
Operating and maintenance	88	80	171	165
PECO Energy Co [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	30	20	60	56
Operating and maintenance	54	47	105	96
Baltimore Gas and Electric Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	22	22	46	60
Operating and maintenance	54	51	108	102
Pepco Holdings LLC [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	35	30	75	76
Operating and maintenance	43	46	85	96
Pepco Holdings LLC [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	25	21	49	40
Operating and maintenance	0	0	0	0
Potomac Electric Power Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	14	11	28	28
Operating and maintenance	28	27	55	56
Potomac Electric Power Company [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	10	8	21	16
Operating and maintenance	30	29	60	58
Delmarva Power and Light Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	10	9	20	23
Operating and maintenance	18	17	35	35
Delmarva Power and Light Company [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	8	7	15	13
Operating and maintenance	25	25	49	49
Atlantic City Electric Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	12	10	26	25
Operating and maintenance	15	14	29	29
Atlantic City Electric Company [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	7	6	13	11
Operating and maintenance	$ 22	$ 22	$ 44	$ 43

Related Party Transactions - Cu

Related Party Transactions - Current Receivables From/Payables To Affiliates (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	$ 2,010	$ 2,217
Related Party
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	240	255
Accounts payable	5	5
Commonwealth Edison Co [Member]
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	719	499
Commonwealth Edison Co [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	71	74
Commonwealth Edison Co [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Commonwealth Edison Co [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Commonwealth Edison Co [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Commonwealth Edison Co [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Commonwealth Edison Co [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Commonwealth Edison Co [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Commonwealth Edison Co [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	3	3
Commonwealth Edison Co [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts payable	71	74
Accounts Receivable, after Allowance for Credit Loss, Current	3	3
PECO Energy Co [Member]
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	347	530
PECO Energy Co [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	36	42
PECO Energy Co [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PECO Energy Co [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PECO Energy Co [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PECO Energy Co [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PECO Energy Co [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	2
PECO Energy Co [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	2
PECO Energy Co [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	1	0
PECO Energy Co [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts payable	36	42
Accounts Receivable, after Allowance for Credit Loss, Current	1	4
Baltimore Gas and Electric Company [Member]
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	390	563
Baltimore Gas and Electric Company [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	32	39
Baltimore Gas and Electric Company [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Baltimore Gas and Electric Company [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Baltimore Gas and Electric Company [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Baltimore Gas and Electric Company [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Baltimore Gas and Electric Company [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Baltimore Gas and Electric Company [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Baltimore Gas and Electric Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Baltimore Gas and Electric Company [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts payable	32	39
Accounts Receivable, after Allowance for Credit Loss, Current	0	0
Pepco Holdings LLC [Member]
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	554	625
Pepco Holdings LLC [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	18	14
Pepco Holdings LLC [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts payable	58	66
Potomac Electric Power Company [Member]
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	287	304
Potomac Electric Power Company [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	32	34
Potomac Electric Power Company [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Potomac Electric Power Company [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Potomac Electric Power Company [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Potomac Electric Power Company [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Potomac Electric Power Company [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Potomac Electric Power Company [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Potomac Electric Power Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Potomac Electric Power Company [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts payable	32	34
Accounts Receivable, after Allowance for Credit Loss, Current	0	0
Delmarva Power and Light Company [Member]
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	128	183
Delmarva Power and Light Company [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	23	22
Delmarva Power and Light Company [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Delmarva Power and Light Company [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Delmarva Power and Light Company [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Delmarva Power and Light Company [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Delmarva Power and Light Company [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Delmarva Power and Light Company [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Delmarva Power and Light Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Delmarva Power and Light Company [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts payable	23	22
Accounts Receivable, after Allowance for Credit Loss, Current	0	0
Atlantic City Electric Company [Member]
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	139	138
Atlantic City Electric Company [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	22	26
Atlantic City Electric Company [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Atlantic City Electric Company [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Atlantic City Electric Company [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Atlantic City Electric Company [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Atlantic City Electric Company [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Atlantic City Electric Company [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Atlantic City Electric Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	2	1
Atlantic City Electric Company [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts payable	22	26
Accounts Receivable, after Allowance for Credit Loss, Current	2	1
Business Services Company [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	62	66
Business Services Company [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	33	39
Business Services Company [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	30	38
Business Services Company [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	7	4
Business Services Company [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	17	20
Business Services Company [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	11	12
Business Services Company [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	10	14
Business Services Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Business Services Company [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	170	193
PHI Service Company [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PHI Service Company [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PHI Service Company [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PHI Service Company [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PHI Service Company [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	15	13
PHI Service Company [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	11	8
PHI Service Company [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	11	9
PHI Service Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
PHI Service Company [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	37	30
Other Legal Entities [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts payable	6	4
Other Legal Entities [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	9	8
Other Legal Entities [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	3	3
Other Legal Entities [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	2	1
Other Legal Entities [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	11	10
Other Legal Entities [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	1
Other Legal Entities [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	1	0
Other Legal Entities [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	1	1
Other Legal Entities [Member] \| Related Party
Related Party Transaction [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	$ 27	$ 24

Related Party Transactions - Lo

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