Commonwealth Edison 10-Q3 Nov 222022 Q3 Quarterly reportFinancial data

Company Profile

Cover Page

Cover Page	9 Months Ended
Cover Page	Sep. 30, 2022 shares
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
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	993,742,030
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
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	127,021,394
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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022		Sep. 30, 2021
Operating revenues
Revenues from alternative revenue programs	$ 64	$ (47)	$ 92		$ 129
Total operating revenues	4,845	4,863	14,412		13,514
Operating expenses
Purchased power and/or fuel from affiliates	0	317	159		867
Operating and maintenance	1,148	1,187	3,436		3,340
Depreciation and amortization	825	758	2,472		2,253
Taxes other than income taxes	377	353	1,061		983
Total operating expenses	3,834	4,107	11,804		11,357
Gain on sales of assets and businesses	0	0	(2)		3
Operating income (loss)	1,011	756	2,606		2,160
Other income and (deductions)
Interest expense, net	(359)	(318)	(1,044)		(947)
Interest expense to affiliates	(6)	(6)	(19)		(20)
Other, net	122	60	435		190
Total other income and (deductions)	(243)	(264)	(628)		(777)
Income (Loss) before income taxes	768	492	1,978		1,383
Income taxes	92	35	356		76
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	676	457	1,622		1,307
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	772	117		134
Net income (loss)	676	1,229	1,739		1,441
Net income (loss) attributable to noncontrolling interests	0	26	1		126
Net Income (Loss) Available to Common Stockholders, Basic	676	1,203	1,738		1,315
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic	676	457	1,622		1,307
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic	0	746	116		8
Other comprehensive income (loss), net of income taxes
Prior service benefit reclassified to periodic benefit cost	0	(1)	0		(4)
Actuarial loss reclassified to periodic benefit cost	9	56	33		167
Pension and non-pension postretirement benefit plan valuation adjustment	0	14	2		15
Unrealized gain (loss) on foreign currency translation	0	(3)	0		(1)
Other comprehensive income	9	66	35		177
Comprehensive income	685	1,295	1,774		1,618
Comprehensive income attributable to noncontrolling interests	0	26	1		126
Comprehensive income attributable to common shareholders/membership interest	$ 685	$ 1,269	$ 1,773		$ 1,492
Average shares of common stock outstanding:
Basic average shares of common stock outstanding	988	979	983		978
Assumed exercise and/or distributions of stock-based awards	1	1	1		1
Diluted average shares of common stock outstanding	989	980	984	[1]	979	[1]
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.68	$ 0.47	$ 1.65		$ 1.33
Income (Loss) from Continuing Operations, Per Diluted Share	0.68	0.47	1.65		1.33
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	0.76	0.12		0.01
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	$ 0	$ 0.76	$ 0.12		$ 0.01
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	0		0
Commonwealth Edison Co [Member]
Operating revenues
Revenues from alternative revenue programs	$ 88	$ (32)	$ 163		$ 32
Operating revenues from affiliates	6	9	14		19
Total operating revenues	1,378	1,789	4,536		4,840
Operating expenses
Purchased power and/or fuel from affiliates	0	93	59		256
Operating and maintenance	286	257	809		752
Related Party Transaction, Expenses from Transactions with Related Party	69	73	236		217
Depreciation and amortization	333	304	982		893
Taxes other than income taxes	104	91	289		243
Total operating expenses	913	1,428	3,357		3,833
Gain on sales of assets and businesses	0	0	(2)		0
Operating income (loss)	465	361	1,177		1,007
Other income and (deductions)
Interest expense, net	(101)	(95)	(298)		(282)
Interest expense to affiliates	(3)	(3)	(10)		(10)
Other, net	14	13	40		35
Total other income and (deductions)	(90)	(85)	(268)		(257)
Income (Loss) before income taxes	375	276	909		750
Income taxes	84	56	203		141
Net income (loss)	291	220	706		609
Other comprehensive income (loss), net of income taxes
Comprehensive income	291	220	706		609
PECO Energy Co [Member]
Operating revenues
Revenues from alternative revenue programs	(5)	3	1		20
Operating revenues from affiliates	3	2	5		6
Total operating revenues	1,014	818	2,877		2,399
Operating expenses
Purchased power and/or fuel from affiliates	0	60	33		141
Operating and maintenance	197	220	561		580
Related Party Transaction, Expenses from Transactions with Related Party	46	43	144		126
Depreciation and amortization	92	86	277		259
Taxes other than income taxes	60	51	155		143
Total operating expenses	798	677	2,230		1,908
Operating income (loss)	216	141	647		491
Other income and (deductions)
Interest expense, net	(42)	(37)	(120)		(110)
Interest expense to affiliates	(3)	(3)	(9)		(9)
Other, net	8	7	23		20
Total other income and (deductions)	(37)	(33)	(106)		(99)
Income (Loss) before income taxes	179	108	541		392
Income taxes	44	(3)	67		9
Net income (loss)	135	111	474		383
Other comprehensive income (loss), net of income taxes
Comprehensive income	135	111	474		383
Baltimore Gas and Electric Company [Member]
Operating revenues
Revenues from alternative revenue programs	(8)	(24)	(40)		(17)
Operating revenues from affiliates	3	7	13		20
Total operating revenues	870	770	2,810		2,426
Operating expenses
Purchased power and/or fuel from affiliates	0	64	18		193
Operating and maintenance	185	159	506		458
Related Party Transaction, Expenses from Transactions with Related Party	50	46	152		137
Depreciation and amortization	148	142	470		434
Taxes other than income taxes	77	72	225		211
Total operating expenses	810	709	2,446		2,080
Operating income (loss)	60	61	364		346
Other income and (deductions)
Interest expense, net	(39)	(36)	(110)		(103)
Other, net	5	7	16		23
Total other income and (deductions)	(34)	(29)	(94)		(80)
Income (Loss) before income taxes	26	32	270		266
Income taxes	(7)	(4)	3		(24)
Net income (loss)	33	36	267		290
Other comprehensive income (loss), net of income taxes
Comprehensive income	33	36	267		290
Pepco Holdings LLC [Member]
Operating revenues
Revenues from alternative revenue programs	(11)	6	(33)		94
Operating revenues from affiliates	3	3	9		10
Total operating revenues	1,598	1,470	4,223		3,854
Operating expenses
Purchased power and/or fuel from affiliates	0	100	50		277
Operating and maintenance	237	235	729		668
Related Party Transaction, Expenses from Transactions with Related Party	40	43	138		122
Depreciation and amortization	238	210	697		614
Taxes other than income taxes	129	127	362		349
Total operating expenses	1,254	1,155	3,535		3,167
Operating income (loss)	344	315	688		687
Other income and (deductions)
Interest expense, net	(72)	(67)	(216)		(201)
Other, net	19	16	56		52
Total other income and (deductions)	(53)	(51)	(160)		(149)
Income (Loss) before income taxes	291	264	528		538
Income taxes	2	(2)	10		3
Net income (loss)	289	266	518		535
Other comprehensive income (loss), net of income taxes
Comprehensive income attributable to common shareholders/membership interest	289	266	518		535
Potomac Electric Power Company [Member]
Operating revenues
Revenues from alternative revenue programs	(8)	9	(15)		54
Operating revenues from affiliates	2	2	4		4
Total operating revenues	724	660	1,919		1,736
Operating expenses
Purchased power and/or fuel from affiliates	0	69	39		200
Operating and maintenance	69	68	214		186
Related Party Transaction, Expenses from Transactions with Related Party	52	52	166		155
Depreciation and amortization	99	104	312		302
Taxes other than income taxes	105	105	291		282
Total operating expenses	555	501	1,588		1,396
Operating income (loss)	169	159	331		340
Other income and (deductions)
Interest expense, net	(37)	(35)	(111)		(104)
Other, net	14	12	39		37
Total other income and (deductions)	(23)	(23)	(72)		(67)
Income (Loss) before income taxes	146	136	259		273
Income taxes	1	6	(2)		9
Net income (loss)	145	130	261		264
Other comprehensive income (loss), net of income taxes
Comprehensive income	145	130	261		264
Delmarva Power and Light Company [Member]
Operating revenues
Revenues from alternative revenue programs	0	(2)	(3)		17
Operating revenues from affiliates	1	2	5		6
Total operating revenues	412	360	1,176		1,040
Operating expenses
Purchased power and/or fuel from affiliates	0	26	10		63
Operating and maintenance	45	47	142		132
Related Party Transaction, Expenses from Transactions with Related Party	39	40	124		117
Depreciation and amortization	59	53	172		157
Taxes other than income taxes	19	17	54		50
Total operating expenses	345	295	999		858
Operating income (loss)	67	65	177		182
Other income and (deductions)
Interest expense, net	(16)	(15)	(48)		(47)
Other, net	3	3	9		9
Total other income and (deductions)	(13)	(12)	(39)		(38)
Income (Loss) before income taxes	54	53	138		144
Income taxes	2	3	8		9
Net income (loss)	52	50	130		135
Other comprehensive income (loss), net of income taxes
Comprehensive income	52	50	130		135
Atlantic City Electric Company [Member]
Operating revenues
Revenues from alternative revenue programs	(3)	0	(14)		23
Operating revenues from affiliates	0	1	2		2
Total operating revenues	462	451	1,120		1,080
Operating expenses
Purchased power and/or fuel from affiliates	0	5	2		14
Operating and maintenance	47	46	145		128
Related Party Transaction, Expenses from Transactions with Related Party	33	35	106		103
Depreciation and amortization	74	46	192		133
Taxes other than income taxes	2	2	7		6
Total operating expenses	353	359	947		911
Operating income (loss)	109	92	173		169
Other income and (deductions)
Interest expense, net	(17)	(14)	(49)		(43)
Other, net	3	1	9		3
Total other income and (deductions)	(14)	(13)	(40)		(40)
Income (Loss) before income taxes	95	79	133		129
Income taxes	1	(11)	2		(12)
Net income (loss)	94	90	131		141
Other comprehensive income (loss), net of income taxes
Comprehensive income	94	90	131		141
Electricity, US Regulated
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	4,557	4,736	12,972		12,344
Operating expenses
Purchased power and/or fuel	1,404	1,452	4,152		3,598
Electricity, US Regulated \| Commonwealth Edison Co [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	1,284	1,812	4,359		4,789
Operating expenses
Purchased power and/or fuel	121	610	982		1,472
Electricity, US Regulated \| PECO Energy Co [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	943	757	2,384		2,008
Operating expenses
Purchased power and/or fuel	377	206	850		540
Electricity, US Regulated \| Baltimore Gas and Electric Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	761	694	2,138		1,874
Operating expenses
Purchased power and/or fuel	320	206	846		501
Electricity, US Regulated \| Pepco Holdings LLC [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	1,568	1,438	4,090		3,632
Operating expenses
Purchased power and/or fuel	586	431	1,474		1,087
Electricity, US Regulated \| Potomac Electric Power Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	730	649	1,930		1,678
Operating expenses
Purchased power and/or fuel	230	103	566		271
Electricity, US Regulated \| Delmarva Power and Light Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	373	337	1,017		899
Operating expenses
Purchased power and/or fuel	159	103	412		289
Electricity, US Regulated \| Atlantic City Electric Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	465	450	1,132		1,055
Operating expenses
Purchased power and/or fuel	197	225	495		527
Natural Gas, US Regulated
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	224	174	1,348		1,041
Operating expenses
Purchased power and/or fuel	80	40	524		316
Natural Gas, US Regulated \| PECO Energy Co [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	73	56	487		365
Operating expenses
Purchased power and/or fuel	26	11	210		119
Natural Gas, US Regulated \| Baltimore Gas and Electric Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	114	93	699		549
Operating expenses
Purchased power and/or fuel	30	20	229		146
Natural Gas, US Regulated \| Pepco Holdings LLC [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	38	23	157		118
Operating expenses
Purchased power and/or fuel	24	9	85		50
Natural Gas, US Regulated \| Delmarva Power and Light Company [Member]
Operating revenues
Revenue from Contract with Customer, Including Assessed Tax	38	23	157		118
Operating expenses
Purchased power and/or fuel	$ 24	$ 9	$ 85		$ 50

[1]The number of stock options not included in the calculation of diluted common shares outstanding due to their antidilutive effect were none for the three and nine months ended September 30, 2022 and 2021, respectively

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net income (loss)	$ 1,739	$ 1,441
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	2,679	6,204
Asset impairments	46	541
Gain on sales of assets and businesses	(8)	(147)
Deferred income taxes and amortization of investment tax credits	256	(45)
Net fair value changes related to derivatives	(59)	(1,244)
Net realized and unrealized (gains) losses on NDT funds	205	(383)
Net unrealized (gains) losses on equity investments	16	83
Other non-cash operating activities	265	(293)
Changes in assets and liabilities:
Accounts receivable	(1,049)	(254)
Inventories	(121)	(101)
Accounts payable and accrued expenses	823	354
Option premiums paid, net	(39)	(186)
Collateral received (posted), net	1,456	2,111
Income taxes	3	250
Regulatory assets and liabilities, net	(689)	(367)
Pension and non-pension postretirement benefit contributions	(596)	(602)
Other assets and liabilities	(786)	(3,221)
Net Cash Provided by (Used in) Operating Activities, Total	4,141	4,141
Cash flows from investing activities
Capital expenditures	(5,179)	(5,970)
Proceeds from NDT fund sales	488	5,766
Investment in NDT funds	(516)	(5,900)
Collection of deferred purchase price	169	3,052
Proceeds from Sale of Property Held-for-sale	16	801
Other investing activities	36	40
Net Cash Provided by (Used in) Investing Activities, Total	(4,986)	(2,211)
Cash flows from financing activities
Changes in short-term borrowings	(335)	(744)
Proceeds from short-term borrowings with maturities greater than 90 days	1,150	1,380
Repayments on short-term borrowings with maturities greater than 90 days	(925)	0
Issuance of long-term debt	5,801	3,406
Retirement of long-term debt	(2,067)	(1,618)
Proceeds from Issuance of Common Stock	563	0
Dividends paid on common stock	(999)	(1,121)
Payments to Acquire Additional Interest in Subsidiaries	0	(885)
Proceeds from employee stock plans	26	63
Transfer of cash, restricted cash, and cash equivalents to Constellation	(2,594)	0
Other financing activities	(121)	(93)
Net cash flows provided by financing activities	499	388
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	(346)	2,318
Cash, restricted cash, and cash equivalents at beginning of period	1,619	1,166
Cash, restricted cash, and cash equivalents at end of period	1,273	3,484
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(147)	(334)
Increase in deferred purchase price	348	2,933
Increase in PPE related to ARO update	331	574
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	207	3,951
Gain on sales of assets and businesses	9	(144)
Deferred income taxes and amortization of investment tax credits	(143)	(242)
Net fair value changes related to derivatives	(59)	(1,244)
Net realized and unrealized (gains) losses on NDT funds	205	(383)
Net unrealized (gains) losses on equity investments	16	83
Other non-cash operating activities	(36)	810
Cash flows from investing activities
Capital expenditures	(227)	(1,098)
Collection of deferred purchase price	169	3,052
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(128)	(77)
Increase in deferred purchase price	348	2,933
Increase in PPE related to ARO update	335	550
Commonwealth Edison Co [Member]
Cash flows from operating activities
Net income (loss)	706	609
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	982	893
Deferred income taxes and amortization of investment tax credits	192	211
Other non-cash operating activities	(89)	95
Changes in assets and liabilities:
Accounts receivable	(351)	(72)
Receivables from payables to affiliates, net	(54)	(16)
Inventories	(9)	(6)
Accounts payable and accrued expenses	226	(36)
Collateral received (posted), net	69	68
Income taxes	0	(9)
Regulatory assets and liabilities, net	(499)	(250)
Pension and non-pension postretirement benefit contributions	(179)	(176)
Other assets and liabilities	(152)	(126)
Net Cash Provided by (Used in) Operating Activities, Total	842	1,185
Cash flows from investing activities
Capital expenditures	(1,801)	(1,723)
Other investing activities	21	20
Net Cash Provided by (Used in) Investing Activities, Total	(1,780)	(1,703)
Cash flows from financing activities
Changes in short-term borrowings	233	(323)
Issuance of long-term debt	750	1,150
Retirement of long-term debt	0	(350)
Dividends paid on common stock	(434)	(380)
Contributions from parent	503	593
Other financing activities	(10)	(16)
Net cash flows provided by financing activities	1,042	674
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	104	156
Cash, restricted cash, and cash equivalents at beginning of period	384	405
Cash, restricted cash, and cash equivalents at end of period	488	561
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(30)	(118)
PECO Energy Co [Member]
Cash flows from operating activities
Net income (loss)	474	383
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	277	259
Deferred income taxes and amortization of investment tax credits	49	19
Other non-cash operating activities	14	4
Changes in assets and liabilities:
Accounts receivable	(49)	47
Receivables from payables to affiliates, net	(34)	16
Inventories	(59)	(21)
Accounts payable and accrued expenses	25	(23)
Income taxes	30	55
Regulatory assets and liabilities, net	(27)	(16)
Pension and non-pension postretirement benefit contributions	(13)	(15)
Other assets and liabilities	(31)	(71)
Net Cash Provided by (Used in) Operating Activities, Total	656	637
Cash flows from investing activities
Capital expenditures	(991)	(878)
Other investing activities	8	5
Net Cash Provided by (Used in) Investing Activities, Total	(983)	(873)
Cash flows from financing activities
Issuance of long-term debt	775	750
Retirement of long-term debt	(350)	(300)
Increase (Decrease) in Due to Affiliates, Current	0	(40)
Dividends paid on common stock	(299)	(254)
Contributions from parent	274	414
Other financing activities	(14)	(8)
Net cash flows provided by financing activities	386	562
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	59	326
Cash, restricted cash, and cash equivalents at beginning of period	44	26
Cash, restricted cash, and cash equivalents at end of period	103	352
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	7	25
Baltimore Gas and Electric Company [Member]
Cash flows from operating activities
Net income (loss)	267	290
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	470	434
Asset impairments	46	0
Deferred income taxes and amortization of investment tax credits	1	7
Other non-cash operating activities	101	77
Changes in assets and liabilities:
Accounts receivable	18	92
Receivables from payables to affiliates, net	(9)	(13)
Inventories	(74)	(30)
Accounts payable and accrued expenses	15	14
Collateral received (posted), net	125	20
Income taxes	(20)	3
Regulatory assets and liabilities, net	(113)	(106)
Pension and non-pension postretirement benefit contributions	(64)	(76)
Other assets and liabilities	14	(43)
Net Cash Provided by (Used in) Operating Activities, Total	777	669
Cash flows from investing activities
Capital expenditures	(918)	(907)
Other investing activities	7	13
Net Cash Provided by (Used in) Investing Activities, Total	(911)	(894)
Cash flows from financing activities
Changes in short-term borrowings	26	0
Issuance of long-term debt	500	600
Retirement of long-term debt	(250)	(300)
Dividends paid on common stock	(225)	(219)
Contributions from parent	186	257
Other financing activities	(8)	(6)
Net cash flows provided by financing activities	229	332
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	95	107
Cash, restricted cash, and cash equivalents at beginning of period	55	145
Cash, restricted cash, and cash equivalents at end of period	150	252
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	12	(70)
Pepco Holdings LLC [Member]
Cash flows from operating activities
Net income (loss)	518	535
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	697	614
Deferred income taxes and amortization of investment tax credits	(2)	0
Other non-cash operating activities	112	(35)
Changes in assets and liabilities:
Accounts receivable	(143)	(112)
Receivables from payables to affiliates, net	(49)	(19)
Inventories	(35)	(13)
Accounts payable and accrued expenses	(15)	19
Collateral received (posted), net	230	25
Income taxes	(3)	17
Regulatory assets and liabilities, net	(82)	(45)
Pension and non-pension postretirement benefit contributions	(75)	(43)
Other assets and liabilities	(71)	(100)
Net Cash Provided by (Used in) Operating Activities, Total	1,082	843
Cash flows from investing activities
Capital expenditures	(1,174)	(1,299)
Other investing activities	5	(1)
Net Cash Provided by (Used in) Investing Activities, Total	(1,169)	(1,300)
Cash flows from financing activities
Changes in short-term borrowings	(468)	(81)
Issuance of long-term debt	925	750
Retirement of long-term debt	(310)	(255)
Increase (Decrease) in Due to Affiliates, Current	36	(5)
Payments of Distributions to Affiliates	(625)	(605)
Proceeds from Contributions from Affiliates	787	667
Other financing activities	(18)	(12)
Net cash flows provided by financing activities	327	459
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	240	2
Cash, restricted cash, and cash equivalents at beginning of period	213	160
Cash, restricted cash, and cash equivalents at end of period	453	162
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	(8)	(74)
Potomac Electric Power Company [Member]
Cash flows from operating activities
Net income (loss)	261	264
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	312	302
Deferred income taxes and amortization of investment tax credits	(5)	12
Other non-cash operating activities	20	(54)
Changes in assets and liabilities:
Accounts receivable	(87)	(57)
Receivables from payables to affiliates, net	(31)	(2)
Inventories	(19)	(6)
Accounts payable and accrued expenses	11	14
Collateral received (posted), net	46	0
Income taxes	(25)	(10)
Regulatory assets and liabilities, net	(44)	(55)
Pension and non-pension postretirement benefit contributions	(9)	(9)
Other assets and liabilities	(29)	(59)
Net Cash Provided by (Used in) Operating Activities, Total	401	340
Cash flows from investing activities
Capital expenditures	(595)	(641)
Other investing activities	2	(2)
Net Cash Provided by (Used in) Investing Activities, Total	(593)	(643)
Cash flows from financing activities
Changes in short-term borrowings	(175)	5
Issuance of long-term debt	625	275
Retirement of long-term debt	(310)	(1)
Increase (Decrease) in Due to Affiliates, Current	25	0
Dividends paid on common stock	(400)	(221)
Contributions from parent	465	244
Other financing activities	(8)	(4)
Net cash flows provided by financing activities	222	298
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	30	(5)
Cash, restricted cash, and cash equivalents at beginning of period	68	65
Cash, restricted cash, and cash equivalents at end of period	98	60
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	2	(16)
Delmarva Power and Light Company [Member]
Cash flows from operating activities
Net income (loss)	130	135
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	172	157
Deferred income taxes and amortization of investment tax credits	9	5
Other non-cash operating activities	22	(2)
Changes in assets and liabilities:
Accounts receivable	(3)	26
Receivables from payables to affiliates, net	(8)	(12)
Inventories	(11)	(5)
Accounts payable and accrued expenses	0	17
Collateral received (posted), net	114	25
Income taxes	4	19
Regulatory assets and liabilities, net	(23)	(20)
Pension and non-pension postretirement benefit contributions	(1)	(1)
Other assets and liabilities	23	(12)
Net Cash Provided by (Used in) Operating Activities, Total	428	332
Cash flows from investing activities
Capital expenditures	(294)	(320)
Changes in Exelon/PHI intercompany money pool	(25)	0
Other investing activities	2	1
Net Cash Provided by (Used in) Investing Activities, Total	(317)	(319)
Cash flows from financing activities
Changes in short-term borrowings	(149)	(124)
Issuance of long-term debt	125	125
Dividends paid on common stock	(95)	(106)
Contributions from parent	147	120
Other financing activities	(4)	(4)
Net cash flows provided by financing activities	24	11
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	135	24
Cash, restricted cash, and cash equivalents at beginning of period	71	15
Cash, restricted cash, and cash equivalents at end of period	206	39
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	2	(24)
Atlantic City Electric Company [Member]
Cash flows from operating activities
Net income (loss)	131	141
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization	192	133
Deferred income taxes and amortization of investment tax credits	2	(20)
Other non-cash operating activities	36	(8)
Changes in assets and liabilities:
Accounts receivable	(53)	(81)
Receivables from payables to affiliates, net	(10)	0
Inventories	(6)	(1)
Accounts payable and accrued expenses	(10)	(3)
Collateral received (posted), net	70	0
Income taxes	7	10
Regulatory assets and liabilities, net	(6)	29
Pension and non-pension postretirement benefit contributions	(7)	(3)
Other assets and liabilities	(54)	(14)
Net Cash Provided by (Used in) Operating Activities, Total	292	183
Cash flows from investing activities
Capital expenditures	(284)	(336)
Other investing activities	1	1
Net Cash Provided by (Used in) Investing Activities, Total	(283)	(335)
Cash flows from financing activities
Changes in short-term borrowings	(144)	38
Issuance of long-term debt	175	350
Retirement of long-term debt	0	(254)
Dividends paid on common stock	(128)	(280)
Contributions from parent	175	303
Other financing activities	(4)	(5)
Net cash flows provided by financing activities	74	152
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect, Total	83	0
Cash, restricted cash, and cash equivalents at beginning of period	29	30
Cash, restricted cash, and cash equivalents at end of period	112	30
Supplemental Cash Flow Information
Decrease in capital expenditures not paid	$ (12)	$ (34)

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 446	$ 672
Restricted cash and cash equivalents	744	321
Accounts receivable
Customer accounts receivable	2,129	2,189
Customer allowance for credit losses	(341)	(320)
Customer accounts receivable, net	1,788	1,869
Other accounts receivable	1,726	1,068
Other allowance for credit losses	(84)	(72)
Other accounts receivable, net	1,642	996
Inventories, net
Fossil fuel and emission allowances	235	105
Materials and supplies	522	476
Regulatory assets, current	1,300	1,296
Other	378	387
Current assets of discontinued operations	0	7,835
Total current assets	7,055	13,957
Accumulated depreciation and amortization	15,517	14,430
Property, plant and equipment, net	67,572	64,558
Deferred debits and other assets
Regulatory assets, noncurrent	8,224	8,224
Goodwill	6,630	6,630
Receivable related to Regulatory Agreement Units	2,658	0
Investments	230	250
Other	1,086	885
Property, plant, and equipment, deferred debits, and other assets of discontinued operations	0	38,509
Total deferred debits and other assets	18,828	54,498
Total assets	93,455	133,013
Current Liabilities
Short-term borrowings	1,690	1,248
Long-term debt due within one year	1,300	2,153
Accounts payable	2,693	2,379
Accrued expenses	1,213	1,137
Payables to affiliates, current	5	5
Regulatory liabilities, current	493	376
Mark-to-market derivative liabilities, current	0	18
Unamortized energy contract liabilities, current	10	89
Other	1,313	766
Current liabilities of discontinued operations	0	7,940
Total current liabilities	8,717	16,111
Long-term debt	35,283	30,749
Long-term debt to financing trusts	390	390
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	11,113	10,611
Regulatory liabilities, noncurrent	8,844	9,628
Asset retirement obligations, noncurrent	266	271
Pension obligations	1,366	2,051
Non-pension postretirement benefit obligations	796	811
Mark-to-market derivative liabilities, noncurrent	67	201
Unamortized energy contract liabilities, noncurrent	37	146
Other	1,994	1,573
Long-term debt, deferred credits, and other liabilities of discontinued operations	0	25,676
Total deferred credits and other liabilities	24,483	50,968
Total Liabilities	68,873	98,218
Commitments and contingencies
Shareholders' equity
Common Stock, No Par Value	$ 0	$ 0
Common stock, shares authorized	2,000	2,000
Common stock, shares outstanding	994	979
Common stock	$ 20,895	$ 20,324
Treasury stock, shares	2	2
Treasury stock, at cost	$ (123)	$ (123)
Accumulated other comprehensive loss, net	(692)	(2,750)
Retained earnings/Undistributed earnings (losses)	4,502	16,942
Total shareholders’ equity	24,582	34,393
Members' Equity [Abstract]
Noncontrolling interests	0	402
Total equity	24,582	34,795
Total liabilities and shareholders’ equity	93,455	133,013
Commonwealth Edison Co [Member]
Current Assets
Cash and cash equivalents	63	131
Restricted cash and cash equivalents	342	210
Accounts receivable
Customer accounts receivable	511	647
Customer allowance for credit losses	(74)	(73)
Customer accounts receivable, net	437	574
Other accounts receivable	690	227
Other allowance for credit losses	(18)	(17)
Other accounts receivable, net	672	210
Receivables from affiliates, current	3	16
Inventories, net
Inventories, net	178	170
Regulatory assets, current	384	335
Other	110	76
Total current assets	2,189	1,722
Accumulated depreciation and amortization	6,521	6,099
Property, plant and equipment, net	27,040	25,995
Deferred debits and other assets
Regulatory assets, noncurrent	2,489	1,870
Goodwill	2,625	2,625
Receivables from affiliates, noncurrent	0	2,761
Receivable related to Regulatory Agreement Units	2,469	0
Investments	6	6
Prepaid pension asset	1,219	1,086
Other	545	405
Total deferred debits and other assets	9,353	8,753
Total assets	38,582	36,470
Current Liabilities
Short-term borrowings	233	0
Accounts payable	876	647
Accrued expenses	351	384
Payables to affiliates, current	54	121
Customer deposits	104	99
Regulatory liabilities, current	297	185
Mark-to-market derivative liabilities, current	0	18
Other	191	133
Total current liabilities	2,106	1,587
Long-term debt	10,517	9,773
Long-term debt to financing trusts	205	205
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	4,951	4,685
Regulatory liabilities, noncurrent	6,668	6,759
Asset retirement obligations, noncurrent	146	144
Non-pension postretirement benefit obligations	168	169
Mark-to-market derivative liabilities, noncurrent	67	201
Other	624	592
Total deferred credits and other liabilities	12,624	12,550
Total Liabilities	25,452	24,115
Commitments and contingencies
Shareholders' equity
Common stock	1,588	1,588
Other paid-in capital	9,579	9,076
Retained earnings/Undistributed earnings (losses)	1,963	1,691
Total shareholders’ equity	13,130	12,355
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	38,582	36,470
PECO Energy Co [Member]
Current Assets
Cash and cash equivalents	94	36
Restricted cash and cash equivalents	9	8
Accounts receivable
Customer accounts receivable	490	489
Customer allowance for credit losses	(103)	(105)
Customer accounts receivable, net	387	384
Other accounts receivable	147	116
Other allowance for credit losses	(11)	(7)
Other accounts receivable, net	136	109
Receivables from affiliates, current	1	1
Inventories, net
Fossil fuel and emission allowances	106	51
Materials and supplies	48	45
Prepaid utility taxes	34	1
Regulatory assets, current	59	48
Other	30	28
Total current assets	904	711
Accumulated depreciation and amortization	4,031	3,964
Property, plant and equipment, net	11,853	11,117
Deferred debits and other assets
Regulatory assets, noncurrent	631	943
Receivables from affiliates, noncurrent	0	597
Receivable related to Regulatory Agreement Units	188	0
Investments	31	34
Prepaid pension asset	408	386
Other	33	36
Total deferred debits and other assets	1,291	1,996
Total assets	14,048	13,824
Current Liabilities
Long-term debt due within one year	50	350
Accounts payable	555	494
Accrued expenses	150	136
Payables to affiliates, current	36	70
Customer deposits	59	48
Regulatory liabilities, current	69	94
Other	27	35
Total current liabilities	946	1,227
Long-term debt	4,562	3,847
Long-term debt to financing trusts	184	184
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,170	2,421
Regulatory liabilities, noncurrent	224	635
Asset retirement obligations, noncurrent	28	29
Non-pension postretirement benefit obligations	289	286
Other	84	83
Total deferred credits and other liabilities	2,795	3,454
Total Liabilities	8,487	8,712
Commitments and contingencies
Shareholders' equity
Common stock	3,702	3,428
Retained earnings/Undistributed earnings (losses)	1,859	1,684
Total shareholders’ equity	5,561	5,112
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	14,048	13,824
Baltimore Gas and Electric Company [Member]
Current Assets
Cash and cash equivalents	20	51
Restricted cash and cash equivalents	130	4
Accounts receivable
Customer accounts receivable	423	436
Customer allowance for credit losses	(54)	(38)
Customer accounts receivable, net	369	398
Other accounts receivable	120	124
Other allowance for credit losses	(12)	(9)
Other accounts receivable, net	108	115
Receivables from affiliates, current	0	1
Inventories, net
Fossil fuel and emission allowances	109	42
Materials and supplies	60	53
Prepaid utility taxes	0	49
Regulatory assets, current	185	215
Other	9	8
Total current assets	990	936
Accumulated depreciation and amortization	4,509	4,299
Property, plant and equipment, net	11,103	10,577
Deferred debits and other assets
Regulatory assets, noncurrent	503	477
Investments	7	14
Prepaid pension asset	299	276
Other	30	44
Total deferred debits and other assets	839	811
Total assets	12,932	12,324
Current Liabilities
Short-term borrowings	156	130
Long-term debt due within one year	300	250
Accounts payable	344	349
Accrued expenses	188	176
Payables to affiliates, current	32	48
Customer deposits	102	97
Regulatory liabilities, current	37	26
Other	158	48
Total current liabilities	1,317	1,124
Long-term debt	3,907	3,711
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	1,787	1,686
Regulatory liabilities, noncurrent	853	934
Asset retirement obligations, noncurrent	29	26
Non-pension postretirement benefit obligations	168	175
Other	73	98
Total deferred credits and other liabilities	2,910	2,919
Total Liabilities	8,134	7,754
Commitments and contingencies
Shareholders' equity
Common stock	2,761	2,575
Retained earnings/Undistributed earnings (losses)	2,037	1,995
Total shareholders’ equity	4,798	4,570
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	12,932	12,324
Pepco Holdings LLC [Member]
Current Assets
Cash and cash equivalents	219	136
Restricted cash and cash equivalents	234	77
Accounts receivable
Customer accounts receivable	707	616
Customer allowance for credit losses	(111)	(104)
Customer accounts receivable, net	596	512
Other accounts receivable	301	283
Other allowance for credit losses	(43)	(39)
Other accounts receivable, net	258	244
Receivables from affiliates, current	1	2
Inventories, net
Fossil fuel and emission allowances	20	11
Materials and supplies	235	209
Regulatory assets, current	431	432
Other	58	69
Total current assets	2,052	1,692
Accumulated depreciation and amortization	2,496	2,108
Property, plant and equipment, net	17,177	16,498
Deferred debits and other assets
Regulatory assets, noncurrent	1,669	1,794
Goodwill	4,005	4,005
Investments	138	145
Prepaid pension asset	367	344
Deferred income taxes	6	8
Other	241	258
Total deferred debits and other assets	6,426	6,554
Total assets	25,655	24,744
Current Liabilities
Short-term borrowings	0	468
Long-term debt due within one year	91	399
Accounts payable	565	578
Accrued expenses	275	281
Payables to affiliates, current	54	104
Borrowings from Exelon/PHI intercompany money pool	43	7
Customer deposits	85	81
Regulatory liabilities, current	85	68
Unamortized energy contract liabilities, current	10	89
PPA termination obligation	87	0
Other	434	171
Total current liabilities	1,729	2,246
Long-term debt	8,039	7,148
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	2,864	2,675
Regulatory liabilities, noncurrent	1,038	1,238
Asset retirement obligations, noncurrent	58	70
Non-pension postretirement benefit obligations	53	66
Unamortized energy contract liabilities, noncurrent	37	146
Other	571	570
Total deferred credits and other liabilities	4,621	4,765
Total Liabilities	14,389	14,159
Commitments and contingencies
Shareholders' equity
Retained earnings/Undistributed earnings (losses)	(316)	(210)
Members' Equity [Abstract]
Membership interest	11,582	10,795
Total members' equity	11,266	10,585
Total liabilities and shareholders’ equity	25,655	24,744
Potomac Electric Power Company [Member]
Current Assets
Cash and cash equivalents	21	34
Restricted cash and cash equivalents	77	34
Accounts receivable
Customer accounts receivable	340	277
Customer allowance for credit losses	(44)	(37)
Customer accounts receivable, net	296	240
Other accounts receivable	179	160
Other allowance for credit losses	(22)	(16)
Other accounts receivable, net	157	144
Receivables from affiliates, current	0	0
Inventories, net
Inventories, net	138	119
Regulatory assets, current	225	213
Other	12	25
Total current assets	926	809
Accumulated depreciation and amortization	4,016	3,875
Property, plant and equipment, net	8,518	8,104
Deferred debits and other assets
Regulatory assets, noncurrent	452	532
Investments	118	120
Prepaid pension asset	275	279
Other	60	59
Total deferred debits and other assets	905	990
Total assets	10,349	9,903
Current Liabilities
Short-term borrowings	0	175
Long-term debt due within one year	4	313
Accounts payable	290	272
Accrued expenses	138	160
Payables to affiliates, current	28	59
Borrowings from Exelon/PHI intercompany money pool	25	0
Customer deposits	37	35
Regulatory liabilities, current	11	14
Merger related obligation	24	27
Current portion of DC PLUG obligation	34	30
Other	81	25
Total current liabilities	672	1,110
Long-term debt	3,748	3,132
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	1,369	1,275
Regulatory liabilities, noncurrent	460	549
Asset retirement obligations, noncurrent	38	45
Non-pension postretirement benefit obligations	0	3
Other	261	314
Total deferred credits and other liabilities	2,128	2,186
Total Liabilities	6,548	6,428
Commitments and contingencies
Shareholders' equity
Common stock	2,767	2,302
Retained earnings/Undistributed earnings (losses)	1,034	1,173
Total shareholders’ equity	3,801	3,475
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	10,349	9,903
Delmarva Power and Light Company [Member]
Current Assets
Cash and cash equivalents	49	28
Restricted cash and cash equivalents	157	43
Accounts receivable
Customer accounts receivable	147	149
Customer allowance for credit losses	(20)	(18)
Customer accounts receivable, net	127	131
Other accounts receivable	51	58
Other allowance for credit losses	(7)	(8)
Other accounts receivable, net	44	50
Receivables from affiliates, current	0	1
Receivable from Exelon/PHI intercompany money pool	25	0
Inventories, net
Fossil fuel and emission allowances	20	11
Materials and supplies	56	54
Prepaid utility taxes	17	20
Regulatory assets, current	71	68
Other	9	16
Total current assets	575	422
Accumulated depreciation and amortization	1,740	1,635
Property, plant and equipment, net	4,718	4,560
Deferred debits and other assets
Regulatory assets, noncurrent	205	212
Prepaid pension asset	154	157
Other	58	61
Total deferred debits and other assets	417	430
Total assets	5,710	5,412
Current Liabilities
Short-term borrowings	0	149
Long-term debt due within one year	84	83
Accounts payable	120	131
Accrued expenses	53	40
Payables to affiliates, current	24	33
Customer deposits	28	28
Regulatory liabilities, current	39	25
Other	198	59
Total current liabilities	546	548
Long-term debt	1,854	1,727
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	853	803
Regulatory liabilities, noncurrent	392	441
Asset retirement obligations, noncurrent	13	16
Non-pension postretirement benefit obligations	9	11
Other	85	89
Total deferred credits and other liabilities	1,352	1,360
Total Liabilities	3,752	3,635
Commitments and contingencies
Shareholders' equity
Common stock	1,356	1,209
Retained earnings/Undistributed earnings (losses)	602	568
Total shareholders’ equity	1,958	1,777
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	5,710	5,412
Atlantic City Electric Company [Member]
Current Assets
Cash and cash equivalents	112	29
Restricted cash and cash equivalents	0	0
Accounts receivable
Customer accounts receivable	221	190
Customer allowance for credit losses	(47)	(49)
Customer accounts receivable, net	174	141
Other accounts receivable	70	76
Other allowance for credit losses	(14)	(15)
Other accounts receivable, net	56	61
Receivables from affiliates, current	1	2
Inventories, net
Inventories, net	42	36
Prepaid utility taxes	12	0
Regulatory assets, current	125	61
Other	4	3
Total current assets	526	333
Accumulated depreciation and amortization	1,523	1,420
Property, plant and equipment, net	3,858	3,729
Deferred debits and other assets
Regulatory assets, noncurrent	525	430
Prepaid pension asset	22	27
Other	35	37
Total deferred debits and other assets	582	494
Total assets	4,966	4,556
Current Liabilities
Short-term borrowings	0	144
Long-term debt due within one year	3	3
Accounts payable	147	165
Accrued expenses	40	44
Payables to affiliates, current	20	31
Customer deposits	19	18
Regulatory liabilities, current	34	28
PPA termination obligation	87	0
Other	81	12
Total current liabilities	431	445
Long-term debt	1,755	1,579
Deferred credits and other liabilities
Deferred income taxes and unamortized investment tax credits	733	682
Regulatory liabilities, noncurrent	164	214
Non-pension postretirement benefit obligations	9	12
Other	121	49
Total deferred credits and other liabilities	1,027	957
Total Liabilities	3,213	2,981
Commitments and contingencies
Shareholders' equity
Common stock	1,765	1,590
Retained earnings/Undistributed earnings (losses)	(12)	(15)
Total shareholders’ equity	1,753	1,575
Members' Equity [Abstract]
Total liabilities and shareholders’ equity	$ 4,966	$ 4,556

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 [Member]	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]	Pepco Holdings LLC [Member] Retained Earnings, Unappropriated [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, 2020	977,466
Beginning balance at Dec. 31, 2020	$ 34,868		$ 19,373		$ (123)	$ 16,735	$ (3,400)	$ 2,283
Beginning Balance at Dec. 31, 2020									$ 11,329	$ 1,588	$ 1,456	$ 8,285	$ 4,533	$ 3,014	$ 1,519	$ 4,197	$ 2,318	$ 1,879					$ 3,203	$ 2,058	$ 1,145	$ 1,676	$ 1,089	$ 587	$ 1,398	$ 1,271	$ 127
Beginning Balance at Dec. 31, 2020																			$ 10,044	$ (68)	$ 10,112
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (264)					(289)		25	197		197		167		167	209		209	128	128			59		59	56		56	14		14
Long -Term Incentive Plan Activity (shares)	640
Long-Term Incentive Plan Activity		$ 5		$ 5
Employee stock purchase plan issuances (shares)	902
Employee stock purchase plan issuances	$ 34		34
Changes in equity of noncontrolling interests	$ (10)							(10)
Common Stock, Dividends, Per Share, Declared	$ 0.38
Common stock dividends	$ (374)					(374)			(127)		(127)		(85)		(85)	(74)		(74)					(28)		(28)	(40)		(40)	(14)		(14)
Other comprehensive income (loss), net of income taxes	$ 54						54
Distributions to member																			(81)	(81)
Contributions from parent									198			198							560		560		138	138		120	120		303	303
Ending balance (in shares) at Mar. 31, 2021	979,008
Ending balance at Mar. 31, 2021	$ 34,313		19,412		(123)	16,072	(3,346)	2,298
Ending Balance at Mar. 31, 2021									11,597	1,588	1,526	8,483	4,615	3,014	1,601	4,332	2,318	2,014					3,372	2,196	1,176	1,812	1,209	603	1,701	1,574	127
Ending Balance at Mar. 31, 2021																			10,651	(21)	10,672
Beginning balance (in shares) at Dec. 31, 2020	977,466
Beginning balance at Dec. 31, 2020	$ 34,868		19,373		(123)	16,735	(3,400)	2,283
Beginning Balance at Dec. 31, 2020									11,329	1,588	1,456	8,285	4,533	3,014	1,519	4,197	2,318	1,879					3,203	2,058	1,145	1,676	1,089	587	1,398	1,271	127
Beginning Balance at Dec. 31, 2020																			10,044	(68)	10,112
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,441								609				383			290			535				264			135			141
Proceeds from Issuance of Common Stock	0
Payments to Acquire Additional Interest in Subsidiaries	(885)
Other comprehensive income (loss), net of income taxes	$ 177						177
Ending balance (in shares) at Sep. 30, 2021	980,150
Ending balance at Sep. 30, 2021	$ 34,259		20,271		(123)	16,926	(3,223)	408
Ending Balance at Sep. 30, 2021									12,151	1,588	1,685	8,878	5,075	3,428	1,647	4,525	2,575	1,950					3,490	2,302	1,188	1,826	1,209	617	1,562	1,574	(12)
Ending Balance at Sep. 30, 2021																			10,641	(138)	10,779
Beginning balance (in shares) at Mar. 31, 2021	979,008
Beginning balance at Mar. 31, 2021	$ 34,313		19,412		(123)	16,072	(3,346)	2,298
Beginning Balance at Mar. 31, 2021									11,597	1,588	1,526	8,483	4,615	3,014	1,601	4,332	2,318	2,014					3,372	2,196	1,176	1,812	1,209	603	1,701	1,574	127
Beginning Balance at Mar. 31, 2021																			10,651	(21)	10,672
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 476					401		75	192		192		104		104	45		45	141	141			75		75	30		30	37		37
Long -Term Incentive Plan Activity (shares)	237
Long-Term Incentive Plan Activity	$ 24		24
Employee stock purchase plan issuances (shares)		420
Employee stock purchase plan issuances	18		18
Changes in equity of noncontrolling interests	$ (13)							(13)
Common Stock, Dividends, Per Share, Declared	$ 0.38
Common stock dividends	$ (375)					(375)			(126)		(126)		(84)		(84)	(72)		(72)					(95)		(95)	(23)		(23)	(215)		(215)
Other comprehensive income (loss), net of income taxes	$ 57						57
Distributions to member																			(333)	(333)
Contributions from parent									197			197	395	395
Ending balance (in shares) at Jun. 30, 2021	979,665
Ending balance at Jun. 30, 2021	$ 34,500		19,454		(123)	16,098	(3,289)	2,360
Ending Balance at Jun. 30, 2021									11,860	1,588	1,592	8,680	5,030	3,409	1,621	4,305	2,318	1,987					3,352	2,196	1,156	1,819	1,209	610	1,523	1,574	(51)
Ending Balance at Jun. 30, 2021																			10,459		10,672	$ (213)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,229					1,203		26	220		220		111		111	36		36	266			266	130		130	50		50	90		90
Long -Term Incentive Plan Activity (shares)	94
Long-Term Incentive Plan Activity	$ 9		9
Employee stock purchase plan issuances (shares)	391
Employee stock purchase plan issuances	$ 18		18
Changes in equity of noncontrolling interests	(13)							(13)
Payments to Acquire Additional Interest in Subsidiaries	(885)		1,080					(1,965)
Deferred Tax Liability Adjustment - Noncontrolling Interest	$ (290)		(290)
Common Stock, Dividends, Per Share, Declared	$ 0.38
Common stock dividends	$ (375)					(375)			(127)		(127)		(85)		(85)	(73)		(73)					(98)		(98)	(43)		(43)	(51)		(51)
Other comprehensive income (loss), net of income taxes	$ 66						66
Distributions to member																			(191)			(191)
Contributions from parent									198			198	19	19		257	257		107		107		106	106
Ending balance (in shares) at Sep. 30, 2021	980,150
Ending balance at Sep. 30, 2021	$ 34,259		20,271		(123)	16,926	(3,223)	408
Ending Balance at Sep. 30, 2021									12,151	1,588	1,685	8,878	5,075	3,428	1,647	4,525	2,575	1,950					3,490	2,302	1,188	1,826	1,209	617	1,562	1,574	(12)
Ending Balance at Sep. 30, 2021																			10,641	(138)	10,779
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	34,393								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 parent									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	34,393								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)	1,739								706				474			267			518				261			130			131
Proceeds from Issuance of Common Stock	563
Payments to Acquire Additional Interest in Subsidiaries	0
Other comprehensive income (loss), net of income taxes	$ 35						35
Ending balance (in shares) at Sep. 30, 2022	995,575
Ending balance at Sep. 30, 2022	$ 24,582		20,895		(123)	4,502	(692)	0
Ending Balance at Sep. 30, 2022	$ 24,582								13,130	1,588	1,963	9,579	5,561	3,702	1,859	4,798	2,761	2,037					3,801	2,767	1,034	1,958	1,356	602	1,753	1,765	(12)
Ending Balance at Sep. 30, 2022																			11,266	(316)	11,582
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			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
Changes in equity of noncontrolling interests	$ 0
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 parent									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		11,499	(375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 676					676			291		291		135		135	33		33	289			289	145		145	52		52	94		94
Long -Term Incentive Plan Activity (shares)	0
Long-Term Incentive Plan Activity	$ 3		3
Employee stock purchase plan issuances (shares)	275
Employee stock purchase plan issuances	$ 10		10
Stock Issued During Period, Shares, New Issues	12,995
Proceeds from Issuance of Common Stock	$ 563		563
Changes in equity of noncontrolling interests	$ 0
Common Stock, Dividends, Per Share, Declared	$ 0.34
Common stock dividends	$ (335)					(335)			(145)		(145)		(99)		(99)	(75)		(75)					(100)		(100)	(39)		(39)	(90)		(90)
Other comprehensive income (loss), net of income taxes	$ 9						9
Distributions to member																			(230)			$ (230)
Contributions from parent									168			168	47	47					83		83		78	78		3	3		2	2
Ending balance (in shares) at Sep. 30, 2022	995,575
Ending balance at Sep. 30, 2022	$ 24,582		$ 20,895		$ (123)	$ 4,502	$ (692)	$ 0
Ending Balance at Sep. 30, 2022	$ 24,582								$ 13,130	$ 1,588	$ 1,963	$ 9,579	$ 5,561	$ 3,702	$ 1,859	$ 4,798	$ 2,761	$ 2,037					$ 3,801	$ 2,767	$ 1,034	$ 1,958	$ 1,356	$ 602	$ 1,753	$ 1,765	$ (12)
Ending Balance at Sep. 30, 2022																			$ 11,266	$ (316)	$ 11,582

Significant Accounting Policies

Significant Accounting Policies (All Registrants)	9 Months Ended
Significant Accounting Policies (All Registrants)	Sep. 30, 2022
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 distribution and transmission 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, accounting, engineering, customer operations, distribution and transmission planning, asset management, system operations, and power procurement, to PHI operating companies. The costs of BSC and PHISCO are directly charged or allocated to the applicable subsidiaries. The results of Exelon’s corporate operations are presented as “Other” in the consolidated financial statements and include intercompany eliminations unless otherwise disclosed. The accompanying consolidated financial statements as of September 30, 2022 and for the three and nine months ended September 30, 2022 and 2021 are unaudited but, in the opinion of the management of each Registrant 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, 2021 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, 2022. 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, meets 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 all periods presented. See Note 2 — Discontinued Operations for additional information.

Discontinued Operations (Exelon

Discontinued Operations (Exelon)	9 Months Ended
Discontinued Operations (Exelon)	Sep. 30, 2022
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	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, through the distribution of 326,663,937 common stock shares of Constellation, the new publicly traded company, to Exelon shareholders. Under the separation plan, Exelon shareholders retained their current shares of Exelon stock and received one share of Constellation common stock for every three shares of Exelon common stock held on January 20, 2022, the record date for the distribution, in a transaction that is tax-free to Exelon and its shareholders for U.S. federal income tax purposes. 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 entered into four term loans consisting of a 364-day term loan for $1.15 billion and three 18-month term loans for $300 million, $300 million and $250 million, respectively. Exelon issued these term loans primarily to fund the cash payment to Constellation and for general corporate purposes. See Note 11 — Debt and Credit Agreements for additional information. • Exelon made a cash payment of $1.75 billion to Constellation on January 31, 2022. • Exelon contributed its equity ownership interest in Generation to Constellation. Exelon no longer retains any equity ownership interest in Generation or Constellation. • Exelon transferred certain corporate assets and employee-related obligations to Constellation. • Exelon received cash from Generation of $258 million to settle the intercompany loan on January 31, 2022. See Note 11 — Debt and Credit Agreements 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 will provide to Constellation and Constellation will provide 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 months ended September 30, 2022, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $68 million recorded in Other income, net and $12 million recorded in Operating and maintenance expense, respectively. Additionally, for the period from February 1, 2022 to September 30, 2022, the amounts Exelon billed Constellation and Constellation billed Exelon for these services were $193 million recorded in Other income, net and $32 million recorded in Operating and maintenance expense, respectively. • Tax Matters Agreement (TMA) – governs the respective rights, responsibilities and obligations of Exelon and Constellation with respect to all tax matters, including tax liabilities and benefits, tax attributes, tax returns, tax contests and other tax sharing regarding U.S. federal, state, local and foreign income taxes, other tax matters and related tax returns. See Note 8. Income Taxes for additional information. In addition, the Utility Registrants will continue to incur expenses from transactions with Generation 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 Generation to provide a portion of ComEd’s electric supply requirements. ComEd also purchased RECs and ZECs from Generation. • 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. • BGE received a portion of its energy requirements from Generation under its MDPSC-approved market-based SOS and gas commodity programs. • Pepco received electric supply from Generation under contracts executed through Pepco’s competitive procurement process approved by the MDPSC and DCPSC. • DPL received a portion of its energy requirements from Generation under its MDPSC and DEPSC approved market-based SOS commodity programs. • ACE received electric supply from Generation under contracts executed through ACE’s competitive procurement process approved by the NJBPU. ComEd and PECO also have receivables with Generation as a result of the nuclear decommissioning contractual construct whereby, to the extent NDT funds are greater than the underlying ARO at the end of decommissioning, such amounts are due back to ComEd and PECO, as applicable, for payment to their respective customers. See Note 9 — Asset Retirement Obligations of the Combined Notes to Consolidated Financial Statements of the 2021 Recast Form 10-K and Note 17 — Related Party Transactions 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. 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 three months ended September 30, 2021 and the nine months ended September 30, 2022 and September 30, 2021. 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. Three Months Ended Nine Months Ended 2021 2022 2021 Operating revenues Competitive business revenues $ 4,083 $ 1,855 $ 13,250 Competitive business revenues from affiliates 325 161 873 Total operating revenues 4,408 2,016 14,123 Operating expenses Competitive businesses purchased power and fuel 1,545 1,138 8,102 Operating and maintenance (a) 845 371 3,132 Depreciation and amortization 866 94 2,735 Taxes other than income taxes 115 44 354 Total operating expenses 3,371 1,647 14,323 Gain on sales of assets and businesses 65 10 144 Operating income (loss) 1,102 379 (56) Other income and (deductions) Interest expense, net (73) (20) (214) Other, net (115) (281) 561 Total other (deductions) and income (188) (301) 347 Income before income taxes 914 78 291 Income taxes 139 (40) 152 Equity in losses of unconsolidated affiliates (3) (1) (5) Net income 772 117 134 Net income attributable to noncontrolling interests 26 1 126 Net income from discontinued operations $ 746 $ 116 $ 8 __________ (a) Includes transaction and transition costs related to the separation of $52 million for the nine months ended September 30, 2022 and $13 million and $19 million for the three and nine months ended September 30, 2021, respectively. See discussion above for additional information. There were no assets and liabilities of discontinued operations included in Exelon’s Consolidated Balance Sheet as of September 30, 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 nine months ended September 30, 2022. Refer to the Distribution of Constellation line in Exelon’s Consolidated Statement of Changes in Shareholders’ Equity for further information. The following table presents the assets and liabilities of discontinued operations in Exelon’s Consolidated Balance Sheet as of December 31, 2021: December 31, 2021 ASSETS Current assets Cash and cash equivalents $ 510 Restricted cash and cash equivalents 72 Accounts receivable Customer accounts receivable 1,724 Customer allowance for credit losses (55) Customer accounts receivable, net 1,669 Other accounts receivable 596 Other allowance for credit losses (4) Other accounts receivable, net 592 Mark-to-market derivative assets 2,169 Inventories, net Fossil fuel and emission allowances 284 Materials and supplies 1,004 Renewable energy credits 529 Assets held for sale 13 Other 993 Total current assets of discontinued operations 7,835 Property, plant, and equipment (net of accumulated depreciation and amortization of $15,888) 19,661 Deferred debits and other assets Nuclear decommissioning trust funds 15,938 Investments 193 Mark-to-market derivative assets 949 Other 1,768 Total property, plant, and equipment, deferred debits, and other assets of discontinued operations 38,509 Total assets of discontinued operations $ 46,344 December 31, 2021 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities Short-term borrowings $ 2,082 Long-term debt due within one year 1,220 Accounts payable 1,757 Accrued expenses 818 Mark-to-market derivative liabilities 981 Renewable energy credit obligation 779 Liabilities held for sale 3 Other 300 Total current liabilities of discontinued operations 7,940 Long-term debt 4,575 Deferred credits and other liabilities Deferred income taxes and unamortized investment tax credits 3,583 Asset retirement obligations 12,819 Pension obligations 939 Non-pension postretirement benefit obligations 876 Spent nuclear fuel obligation 1,210 Mark-to-market derivative liabilities 513 Other 1,161 Total long-term debt, deferred credits, and other liabilities of discontinued operations 25,676 Total liabilities of discontinued operations $ 33,616 The following table presents selected financial information regarding cash flows of the discontinued operations that are included within Exelon’s Consolidated Statements of Cash Flows for the nine months ended September 30, 2022 and September 30, 2021. Nine Months Ended 2022 2021 Non-cash items included in net income from discontinued operations: Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization $ 207 $ 3,951 Asset impairments — 537 Loss (gain) on sales of assets and businesses 9 (144) Deferred income taxes and amortization of investment tax credits (143) (242) Net fair value changes related to derivatives (59) (1,244) Net realized and unrealized losses (gains) on NDT fund investments 205 (383) Net unrealized losses on equity investments 16 83 Other decommissioning-related activity 36 (810) Cash flows from investing activities: Capital expenditures (227) (1,098) Collection of DPP 169 3,052 Supplemental cash flow information: Decrease in capital expenditures not paid (128) (77) Increase in DPP 348 2,933 Increase in PP&E related to ARO update 335 550

Regulatory Matters (All Registr

Regulatory Matters (All Registrants)	9 Months Ended
Regulatory Matters (All Registrants)	Sep. 30, 2022
Regulated Operations [Abstract]
Regulatory Matters (All Registrants)	Regulatory Matters (All Registrants) As discussed in Note 3 — Regulatory Matters of the 2021 Recast Form 10-K, the Registrants are involved in rate and regulatory proceedings at FERC and their state commissions. The following discusses developments in 2022 and updates to the 2021 Recast Form 10-K. Distribution Base Rate Case Proceedings The following tables show the completed and pending distribution base rate case proceedings in 2022. 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 16, 2021 Electric $ 51 $ 46 7.36 % December 1, 2021 January 1, 2022 PECO - Pennsylvania March 30, 2021 Electric 246 132 N/A (b) November 18, 2021 January 1, 2022 March 31, 2022 Natural Gas 82 55 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 - District of Columbia (d) May 30, 2019 (amended June 1, 2020) Electric 136 109 9.275 % June 8, 2021 July 1, 2021 Pepco - Maryland (e) October 26, 2020 (amended March 31, 2021) Electric 104 52 9.55 % June 28, 2021 June 28, 2021 DPL - Maryland (f) September 1, 2021 (amended December 23, 2021) Electric 27 13 9.60 % March 2, 2022 March 2, 2022 DPL - Delaware January 14, 2022 (amended August 15, 2022) Natural Gas 13 8 9.60 % October 12, 2022 November 1, 2022 ACE - New Jersey (g) December 9, 2020 (amended February 26, 2021) Electric 67 41 9.60 % July 14, 2021 January 1, 2022 __________ (a) ComEd's 2022 approved revenue requirement reflects an increase of $37 million for the initial year revenue requirement for 2022 and an increase of $9 million related to the annual reconciliation for 2020. The revenue requirement for 2022 provides for a weighted average debt and equity return on distribution rate base of 5.72%, inclusive of an allowed ROE of 7.36%, reflecting the monthly average yields for 30-year treasury bonds plus 580 basis points. The reconciliation revenue requirement for 2020 provides for a weighted average debt and equity return on distribution rate base of 5.69%, inclusive of an allowed ROE of 7.29%, reflecting the monthly yields on 30-year treasury bonds plus 580 basis points less a performance metrics penalty of 7 basis points. (b) The PECO electric and natural gas base rate case proceedings were resolved through settlement agreements, 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 cumulative multi-year plan with 18-months remaining in 2021 through 2022. The DCPSC awarded Pepco electric incremental revenue requirement increases of $42 million and $67 million, before offsets, for 2021 and 2022, respectively. However, the DCPSC utilized the acceleration of refunds for certain tax benefits along with other rate relief to partially offset the customer rate increases by $22 million and $40 million for 2021 and 2022, respectively. (e) 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. Whether certain tax benefits will be used to offset the customer rate increases for the 12-month period ending March 31, 2024 has not been decided, and Pepco cannot predict the outcome. (f) The approved settlement reflects a 9.60% ROE, which is solely for the purposes of calculating AFUDC and regulatory asset carrying costs. (g) Requested and approved increases are before New Jersey sales and use tax. The order allows ACE to retain approximately $11 million of certain tax benefits which resulted in a decrease to income tax expense in Exelon's, PHI's, and ACE's Consolidated Statements of Operations and Comprehensive Income in the third quarter of 2021. Pending Distribution Base Rate Case Proceedings Registrant/Jurisdiction Filing Date Service Requested Revenue Requirement Increase Requested ROE Expected Approval Timing ComEd - Illinois (a) April 15, 2022 Electric $ 199 7.85 % Fourth quarter of 2022 DPL - Maryland (b) May 19, 2022 Electric 38 10.25 % Fourth quarter of 2022 __________ (a) ComEd's 2023 requested revenue requirement 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 average monthly 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 average monthly yields for 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 as a result of the law authorizing the rate setting process sunsetting at the end of 2022. See Note 3 - Regulatory Matters of the 2021 Recast Form 10-K for additional information on ComEd's transition away from the electric distribution formula rate. (b) Reflects a three-year cumulative multi-year plan for January 1, 2023 to December 31, 2025 and total requested revenue requirement increases, before offsets, of $23 million effective January 1, 2023, $8 million effective January 1, 2024, and $7 million effective January 1, 2025, to recover capital investments made in 2021 and planned capital investments through the end of 2025. DPL proposed the acceleration of refunds for certain tax benefits to partially offset the customer rate increases by $12 million and $8 million in 2023 and 2024, respectively. On October 7, 2022, DPL filed a partial settlement agreement with the MDPSC. The partial settlement provides for a total requested revenue requirement increase of $29 million and requested ROE of 9.60%. The partial settlement reflects a three-year cumulative multi-year plan for January 1, 2023 to December 31, 2025 and total requested revenue increases of $17 million effective January 1, 2023, $6 million effective January 1, 2024, and $6 million effective January 1, 2025. While the pending base rate case filing is partially settled, there are no issues unsettled related to the requested revenue requirement increase and the requested ROE. While there will likely be no changes to the amended requested revenue requirement increase and requested ROE, DPL cannot predict the outcome of any unforeseen proceedings. 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 2022, the following total increases/(decreases) were included in the Utility Registrants' electric transmission formula rate updates: Registrant (a) Initial Revenue Requirement Increase Annual Reconciliation (Decrease) Increase Total Revenue Requirement Increase Allowed Return on Rate Base (b) Allowed ROE (c) ComEd $ 24 $ (24) $ — 8.11 % 11.50 % PECO 23 16 39 7.30 % 10.35 % BGE 25 (4) 16 (d) 7.30 % 10.50 % Pepco 16 15 31 7.60 % 10.50 % DPL 9 2 11 7.09 % 10.50 % ACE 21 13 34 7.18 % 10.50 % __________ (a) All rates are effective June 1, 2022 - May 31, 2023, subject to review by interested parties pursuant to review protocols of each Utility Registrants' tariff. (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 $5 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 multi-year plan 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 its last performance-based electric distribution formula rate update filing under EIMA in April 2022. Those rates will take effect in 2023. Also during 2023, ComEd will file with the ICC a petition to reconcile is 2022 actual costs with the approved revenue requirement in effect in 2022. Under CEJA, 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. On November 3, 2022, ComEd announced it plans on filing a four-year multi-year plan (“MRP”) in January 2023. The MRP will set rates for 2024 – 2027, based on forecasted revenue requirements and an ICC determined rate of return on rate base, including the cost of common equity. Costs incurred during each year of the multi-year plan 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. That reconciliation is subject to adjustment for certain expenses and, unless the plan is modified, to a 5% cap on increases in certain costs over the costs in the previously approved multi-year rate plan revenue requirement. 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. 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 October 27, 2022, ComEd filed for rehearing concerning certain aspects of three of those metrics; the ICC must rule on that rehearing request within 20 days. 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 and all its costs of doing so will be recovered through a new rider. 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. ComEd began issuing credits to its retail customers under its new CMC rider in the June 2022 billing period and recorded a regulatory asset of $534 million as of September 30, 2022 for the difference between customer credits issued and the credit to be received from the participating nuclear-powered generating facilities. Excess Deferred Income Taxes The ICC initiated a docket to accelerate and fully credit to customers TCJA unprotected property-related EDIT no later than December 31, 2025. On July 7, 2022, the ICC issued a final order on the schedule for the acceleration of EDIT amortization, adopting the proposal as submitted by several parties, including ComEd, ICC Staff, the Illinois Attorney General's Office, and the Citizens Utility Board. EDIT amortization will be credited to customers through a new rider from January 1, 2023 through December 31, 2025. Beneficial Electrification Plan On July 1, 2022, ComEd filed a proposed plan to promote beneficial electrification efforts in its Northern Illinois service area with the ICC as required by CEJA. ComEd's plan is designed to meaningfully reduce barriers to beneficial electrification, including those related to electric vehicles, such as upfront technology adoption costs, charging costs, and charging availability; promote equity and environmental justice; reduce carbon emissions and surface-level pollutants; and support customer education and awareness of electrification options. As proposed, ComEd could expend approximately $300 million in total over the three-year period 2023 through 2025. The beneficial electrification plan requests recovery of all those costs through a rider mechanism, under which certain of the costs would be amortized over ten years with a return on the unrecovered balance. Certain legal questions regarding the permissible scope of the plan's activities and applicable budget have been raised by motion, and the ICC may decide those issues in an interim order. A final order is expected to be issued by the ICC no later than the first quarter of 2023. At this time, ComEd cannot predict the outcome of these proceedings. See Note 3 — Regulatory Matters of the 2021 Recast Form 10-K for additional information on CEJA (referred to as Clean Energy Law). Energy Efficiency Formula Rate (Exelon and ComEd). During 2022, the ICC approved the following total increases in ComEd's requested energy efficiency revenue requirement: Filing Date Requested Revenue Requirement Increase Approved Revenue Requirement Increase (a) Approved ROE Approval Date Rate Effective Date May 25, 2022 $ 50 $ 50 7.85 % October 27, 2022 January 1, 2023 __________ (a) ComEd’s 2023 approved revenue requirement above reflects an increase of $66 million for the initial year revenue requirement for 2023 and a decrease of $16 million related to the annual reconciliation for 2021. The revenue requirement for 2023 provides for a weighted average debt and equity return on the energy efficiency regulatory asset and 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 revenue requirement for the 2021 reconciliation year provides for a weighted average debt and equity return on the energy efficiency regulatory asset and rate base of 5.52% inclusive of an allowed ROE of 6.99%, which includes a downward performance adjustment that decreased the ROE. The performance adjustment can either increase or decrease the ROE based upon the achievement of energy efficiency savings goals. New Jersey Regulatory Matters Termination of Energy Procurement Provisions of PPAs (Exelon, PHI, and ACE). On December 22, 2021, ACE filed with the NJBPU a petition to terminate the provisions in the PPAs to purchase electricity from two coal-powered generation facilities located in the state of New Jersey. The petition was approved by the NJBPU on March 23, 2022. Upon closing of the transaction on March 31, 2022, ACE recognized a liability of $203 million for the contract termination fee, which is to be paid by the end of 2024, and recognized a corresponding regulatory asset of $203 million. As of September 30, 2022, the $158 million liability for the contract termination fee consists of $87 million and $71 million included in Other current liabilities and Other deferred credits and other liabilities, respectively, in Exelon's Consolidated Balance Sheet. The current and noncurrent liability is included in PPA termination obligation and Other deferred credits and other liabilities, respectively, in PHI's and ACE's Consolidated Balance Sheets. For the nine months ended September 30, 2022, ACE has paid $45 million of the liability, which is recorded in Changes in Other assets and liabilities in Exelon's, PHI's, and ACE's Consolidated Statements of Cash Flows. Regulatory Assets and Liabilities The Utility Registrants' regulatory assets and liabilities have not changed materially since December 31, 2021, unless noted below. See Note 3 — Regulatory Matters of the 2021 Recast Form 10-K for additional information on the specific regulatory assets and liabilities. ComEd. Regulatory assets increased $668 million primarily due to increases of $534 million in the CMC regulatory asset, as discussed in CEJA above, and $161 million in the Electric Distribution Formula Rate Annual Reconciliations regulatory asset, partially offset by a decrease of $152 million in the Renewable Energy regulatory asset. PECO. Regulatory assets decreased $301 million primarily due to a decrease of $300 million in the Deferred Income Taxes regulatory asset. Regulatory liabilities decreased $436 million primarily due to decreases of $409 million in the Decommissioning the Regulatory Agreement Units regulatory liability and $19 million in the Electric Energy and Natural Gas Costs regulatory liability. BGE. Regulatory liabilities decreased $70 million primarily due to a decrease of $100 million in the Deferred Income Taxes regulatory liability. Pepco. Regulatory assets decreased $68 million primarily due to decreases of $25 million in the DC PLUG Charge regulatory asset, $16 million in the Under-Recovered Revenue Decoupling regulatory asset, and $13 million in the Energy Efficiency and Demand Response Programs regulatory asset. Regulatory liabilities decreased $92 million primarily due to a decrease of $99 million in the Deferred Income Taxes regulatory liability. DPL . Regulatory liabilities decreased $35 million primarily due to a decrease of $41 million in the Deferred Income Taxes regulatory liability. ACE. Regulatory assets increased $159 million primarily due to an increase of $140 million in the Electric Energy Costs regulatory asset as a result of the PPA termination. Regulatory liabilities decreased $44 million primarily due to a decrease of $49 million in the Deferred Income Taxes regulatory liability, partially offset by a $12 million increase in the Over-Recovered Revenue Decoupling regulatory liability. 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. Exelon ComEd (a) PECO BGE (b) PHI Pepco (c) DPL (c) ACE (b) September 30, 2022 $ 49 $ 5 $ — $ 30 $ 14 $ 11 $ 2 $ 1 December 31, 2021 43 1 — 37 5 3 2 — __________ (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)	9 Months Ended
Revenue from Contracts with Customers (All Registrants)	Sep. 30, 2022
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 2021 Recast 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 liabilities in their Consolidated Balance Sheets. For PHI, Pepco, DPL, and ACE these contract liabilities primarily relate to upfront consideration received in the third quarter of 2020 for a collaborative arrangement with an unrelated owner and manager of communication infrastructure. The revenue attributable to this arrangement will be recognized as operating revenue over the 35 years under the collaborative arrangement. The following table provides a rollforward of the contract liabilities reflected in Exelon's, PHI's, Pepco's, DPL's, and ACE's Consolidated Balance Sheets for the three and nine months ended September 30, 2022 and 2021. As of September 30, 2022 and December 31, 2021, ComEd's, PECO's, and BGE's contract liabilities were immaterial. Exelon (a) PHI (a) Pepco (a) DPL (a) ACE (a) Balance as of December 31, 2021 $ 109 $ 109 $ 87 $ 11 $ 11 Revenues recognized (2) (2) (2) — — Balance as of March 31, 2022 107 107 85 11 11 Revenues recognized (2) (2) (1) — (1) Balance as of June 30, 2022 105 105 84 11 10 Revenues recognized (2) (2) (1) (1) — Balance as of September 30, 2022 $ 103 $ 103 $ 83 $ 10 $ 10 Exelon (a) PHI (a) Pepco (a) DPL (a) ACE (a) Balance as of December 31, 2020 $ 118 $ 118 $ 94 $ 12 $ 12 Revenues recognized (2) (2) (2) — — Balance as of March 31, 2021 116 116 92 12 12 Revenues recognized (3) (3) (1) (1) (1) Balance as of June 30, 2021 113 113 91 11 11 Revenues recognized (2) (2) (2) — — Balance as of September 30, 2021 $ 111 $ 111 $ 89 $ 11 $ 11 __________ (a) Revenues recognized in the three and nine months ended September 30, 2022 and 2021, were included in the contract liabilities at December 31, 2021 and 2020, respectively. Transaction Price Allocated to Remaining Performance Obligations The following table shows the amounts of future revenues expected to be recorded in each year for performance obligations that are unsatisfied or partially unsatisfied as of September 30, 2022. 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. 2022 2023 2024 2025 2026 and thereafter Total Exelon $ 2 $ 8 $ 6 $ 5 $ 82 $ 103 PHI 2 8 6 5 82 103 Pepco 2 6 5 5 65 83 DPL — 1 — — 9 10 ACE — 1 1 — 8 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 Registrant's revenue disaggregation.

Segment Information (All Regist

Segment Information (All Registrants)	9 Months Ended
Segment Information (All Registrants)	Sep. 30, 2022
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 ComEd, PECO, BGE, Pepco, DPL, and ACE based on net income. An analysis and reconciliation of the Registrants’ reportable segment information to the respective information in the consolidated financial statements for the three and nine months ended September 30, 2022 and 2021 is as follows: Three Months Ended September 30, 2022 and 2021 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2022 Electric revenues $ 1,378 $ 941 $ 757 $ 1,557 $ — $ (12) $ 4,621 Natural gas revenues — 73 113 38 — — 224 Shared service and other revenues — — — 3 381 (384) — Total operating revenues $ 1,378 $ 1,014 $ 870 $ 1,598 $ 381 $ (396) $ 4,845 2021 Electric revenues $ 1,789 $ 762 $ 677 $ 1,444 $ — $ 20 $ 4,692 Natural gas revenues — 56 93 23 — (1) 171 Shared service and other revenues — — — 3 534 (537) — Total operating revenues $ 1,789 $ 818 $ 770 $ 1,470 $ 534 $ (518) $ 4,863 Intersegment revenues (c) : 2022 $ 6 $ 3 $ 3 $ 3 $ 378 $ (393) $ — 2021 9 2 7 3 531 (516) 36 Depreciation and amortization: 2022 $ 333 $ 92 $ 148 $ 238 $ 14 $ — $ 825 2021 304 86 142 210 16 — 758 Operating expenses: 2022 $ 913 $ 798 $ 810 $ 1,254 $ 439 $ (380) $ 3,834 2021 1,428 677 709 1,155 491 (353) 4,107 Interest expense, net: 2022 $ 104 $ 45 $ 39 $ 72 $ 105 $ — $ 365 2021 98 40 36 67 83 — 324 Income (loss) from continuing operations before income taxes: 2022 $ 375 $ 179 $ 26 $ 291 $ (103) $ — $ 768 2021 276 108 32 264 (34) (154) 492 Income Taxes: 2022 $ 84 $ 44 $ (7) $ 2 $ (31) $ — $ 92 2021 56 (3) (4) (2) (6) (6) 35 Net income (loss) from continuing operations: 2022 $ 291 $ 135 $ 33 $ 289 $ (71) $ (1) $ 676 2021 220 111 36 266 (27) (149) 457 Capital Expenditures: 2022 $ 593 $ 333 $ 340 $ 398 $ 8 $ — $ 1,672 2021 561 301 287 410 4 — 1,563 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 17 — Related Party Transactions for additional information on intersegment revenues. PHI: Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2022 Electric revenues $ 724 $ 374 $ 462 $ — $ (3) $ 1,557 Natural gas revenues — 38 — — — 38 Shared service and other revenues — — — 94 (91) 3 Total operating revenues $ 724 $ 412 $ 462 $ 94 $ (94) $ 1,598 2021 Electric revenues $ 660 $ 337 $ 451 $ — $ (4) $ 1,444 Natural gas revenues — 23 — — — 23 Shared service and other revenues — — — 92 (89) 3 Total operating revenues $ 660 $ 360 $ 451 $ 92 $ (93) $ 1,470 Intersegment revenues (c) : 2022 $ 2 $ 1 $ — $ 94 $ (94) $ 3 2021 2 2 1 91 (93) 3 Depreciation and amortization: 2022 $ 99 $ 59 $ 74 $ 6 $ — $ 238 2021 104 53 46 7 — 210 Operating expenses: 2022 $ 555 $ 345 $ 353 $ 96 $ (95) $ 1,254 2021 501 295 359 93 (93) 1,155 Interest expense, net: 2022 $ 37 $ 16 $ 17 $ 1 $ 1 $ 72 2021 35 15 14 3 — 67 Income (loss) before income taxes: 2022 $ 146 $ 54 $ 95 $ (4) $ — $ 291 2021 136 53 79 (4) — 264 Income Taxes: 2022 $ 1 $ 2 $ 1 $ (2) $ — $ 2 2021 6 3 (11) — — (2) Net income (loss): 2022 $ 145 $ 52 $ 94 $ (2) $ — $ 289 2021 130 50 90 (4) — 266 Capital Expenditures: 2022 $ 193 $ 100 $ 105 $ — $ — $ 398 2021 202 109 97 2 — 410 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon. The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Three Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 935 $ 620 $ 406 $ 808 $ 318 $ 207 $ 283 Small commercial & industrial 217 149 88 179 44 65 70 Large commercial & industrial (117) 93 158 401 303 43 55 Public authorities & electric railroads 3 8 7 16 9 4 3 Other (a) 246 71 101 166 57 55 54 Total electric revenues (b) $ 1,284 $ 941 $ 760 $ 1,570 $ 731 $ 374 $ 465 Natural gas revenues Residential $ — $ 46 $ 70 $ 10 $ — $ 10 $ — Small commercial & industrial — 20 13 6 — 6 — Large commercial & industrial — — 28 3 — 3 — Transportation — 5 — 3 — 3 — Other (c) — 2 2 16 — 16 — Total natural gas revenues (d) $ — $ 73 $ 113 $ 38 $ — $ 38 $ — Total revenues from contracts with customers $ 1,284 $ 1,014 $ 873 $ 1,608 $ 731 $ 412 $ 465 Other revenues Revenues from alternative revenue programs $ 88 $ (5) $ (8) $ (11) $ (8) $ — $ (3) Other electric revenues (e) 6 5 4 1 1 — — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ 94 $ — $ (3) $ (10) $ (7) $ — $ (3) Total revenues for reportable segments $ 1,378 $ 1,014 $ 870 $ 1,598 $ 724 $ 412 $ 462 Three Months Ended September 30, 2021 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 978 $ 509 $ 383 $ 782 $ 309 $ 198 $ 275 Small commercial & industrial 433 113 73 150 36 53 61 Large commercial & industrial 148 67 128 320 244 27 49 Public authorities & electric railroads 11 7 7 15 8 4 3 Other (a) 245 61 104 172 53 56 63 Total electric revenues (b) $ 1,815 $ 757 $ 695 $ 1,439 $ 650 $ 338 $ 451 Natural gas revenues Residential $ — $ 36 $ 57 $ 10 $ — $ 10 $ — Small commercial & industrial — 13 10 5 — 5 — Large commercial & industrial — — 22 2 — 2 — Transportation — 5 — 3 — 3 — Other (c) — 2 6 3 — 3 — Total natural gas revenues (d) $ — $ 56 $ 95 $ 23 $ — $ 23 $ — Total revenues from contracts with customers $ 1,815 $ 813 $ 790 $ 1,462 $ 650 $ 361 $ 451 Other revenues Revenues from alternative revenue programs $ (32) $ 3 $ (24) $ 6 $ 9 $ (2) $ — Other electric revenues (e) 6 2 3 2 1 1 — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ (26) $ 5 $ (20) $ 8 $ 10 $ (1) $ — Total revenues for reportable segments $ 1,789 $ 818 $ 770 $ 1,470 $ 660 $ 360 $ 451 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • $6 million, $9 million at ComEd • $3 million, $2 million at PECO • $2 million, $4 million at BGE • $3 million, $3 million at PHI • $2 million, $2 million at Pepco • $1 million, $2 million at DPL • less than $1 million, $1 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • less than $1 million, less than $1 million at PECO • $1 million, $3 million at BGE (e) Includes late payment charge revenues. Nine Months Ended September 30, 2022 and 2021 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2022 Electric revenues $ 4,536 $ 2,390 $ 2,122 $ 4,058 $ — $ (24) $ 13,082 Natural gas revenues — 487 688 157 — (2) 1,330 Shared service and other revenues — — — 8 1,342 (1,350) — Total operating revenues $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,342 $ (1,376) $ 14,412 2021 Electric revenues $ 4,840 $ 2,033 $ 1,866 $ 3,726 $ — $ 5 $ 12,470 Natural gas revenues — 366 560 118 — — 1,044 Shared service and other revenues — — — 10 1,549 (1,559) — Total operating revenues $ 4,840 $ 2,399 $ 2,426 $ 3,854 $ 1,549 $ (1,554) $ 13,514 Intersegment revenues (c) : 2022 $ 14 $ 5 $ 13 $ 9 $ 1,342 $ (1,377) $ 6 2021 19 6 20 10 1,542 (1,549) 48 Depreciation and amortization: 2022 $ 982 $ 277 $ 470 $ 697 $ 46 $ — $ 2,472 2021 893 259 434 614 52 1 2,253 Operating expenses: 2022 $ 3,357 $ 2,230 $ 2,446 $ 3,535 $ 1,524 $ (1,288) $ 11,804 2021 3,833 1,908 2,080 3,167 1,436 (1,067) 11,357 Interest expense, net: 2022 $ 308 $ 129 $ 110 $ 216 $ 300 $ — $ 1,063 2021 292 119 103 201 253 (1) 967 Income (loss) from continuing operations before income taxes: 2022 $ 909 $ 541 $ 270 $ 528 $ (228) $ (42) $ 1,978 2021 750 392 266 538 (116) (447) 1,383 Income Taxes: 2022 $ 203 $ 67 $ 3 $ 10 $ 82 $ (9) $ 356 2021 141 9 (24) 3 (27) (26) 76 Net income (loss) from continuing operations: 2022 $ 706 $ 474 $ 267 $ 518 $ (310) $ (33) $ 1,622 2021 609 383 290 535 (88) (422) 1,307 Capital Expenditures: 2022 $ 1,801 $ 991 $ 918 $ 1,174 $ 68 $ — $ 4,952 2021 1,723 878 907 1,299 65 — 4,872 Total assets: September 30, 2022 $ 38,582 $ 14,048 $ 12,932 $ 25,655 $ 6,341 $ (4,103) $ 93,455 December 31, 2021 36,470 13,824 12,324 24,744 7,626 (8,319) 86,669 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 17 — Related Party Transactions for additional information on intersegment revenues. PHI: Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2022 Electric revenues $ 1,919 $ 1,019 $ 1,120 $ — $ — $ 4,058 Natural gas revenues — 157 — — — 157 Shared service and other revenues — — — 298 (290) 8 Total operating revenues $ 1,919 $ 1,176 $ 1,120 $ 298 $ (290) $ 4,223 2021 Electric revenues $ 1,736 $ 922 $ 1,080 $ — $ (12) $ 3,726 Natural gas revenues — 118 — — — 118 Shared service and other revenues — — — 281 (271) 10 Total operating revenues $ 1,736 $ 1,040 $ 1,080 $ 281 $ (283) $ 3,854 Intersegment revenues (c) : 2022 $ 4 $ 5 $ 2 $ 288 $ (290) $ 9 2021 4 6 2 281 (283) 10 Depreciation and amortization: 2022 $ 312 $ 172 $ 192 $ 21 $ — $ 697 2021 302 157 133 22 — 614 Operating expenses: 2022 $ 1,588 $ 999 $ 947 $ 291 $ (290) $ 3,535 2021 1,396 858 911 285 (283) 3,167 Interest expense, net: 2022 $ 111 $ 48 $ 49 $ 7 $ 1 $ 216 2021 104 47 43 7 — 201 Income (loss) before income taxes: 2022 $ 259 $ 138 $ 133 $ (2) $ — $ 528 2021 273 144 129 (8) — 538 Income Taxes: 2022 $ (2) $ 8 $ 2 $ 2 $ — $ 10 2021 9 9 (12) (3) — 3 Net income (loss): 2022 $ 261 $ 130 $ 131 $ (4) $ — $ 518 2021 264 135 141 (5) — 535 Capital Expenditures: 2022 $ 595 $ 294 $ 284 $ 1 $ — $ 1,174 2021 641 320 336 2 — 1,299 Total assets: September 30, 2022 $ 10,349 $ 5,710 $ 4,966 $ 4,716 $ (86) $ 25,655 December 31, 2021 9,903 5,412 4,556 4,933 (60) 24,744 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon. The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Nine Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,610 $ 1,538 $ 1,158 $ 2,007 $ 826 $ 570 $ 611 Small commercial & industrial 953 386 239 461 117 173 171 Large commercial & industrial 48 229 418 1,056 806 99 151 Public authorities & electric railroads 22 23 20 47 25 11 11 Other (a) 718 202 297 524 157 168 190 Total electric revenues (b) $ 4,351 $ 2,378 $ 2,132 $ 4,095 $ 1,931 $ 1,021 $ 1,134 Natural gas revenues Residential $ — $ 335 $ 448 $ 77 $ — $ 77 $ — Small commercial & industrial — 125 77 35 — 35 — Large commercial & industrial — — 128 9 — 9 — Transportation — 19 — 11 — 11 — Other (c) — 7 50 25 — 25 — Total natural gas revenues (d) $ — $ 486 $ 703 $ 157 $ — $ 157 $ — Total revenues from contracts with customers $ 4,351 $ 2,864 $ 2,835 $ 4,252 $ 1,931 $ 1,178 $ 1,134 Other revenues Revenues from alternative revenue programs $ 163 $ 1 $ (40) $ (33) $ (15) $ (3) $ (14) Other electric revenues (e) 22 11 11 4 3 1 — Other natural gas revenues (e) — 1 4 — — — — Total other revenues $ 185 $ 13 $ (25) $ (29) $ (12) $ (2) $ (14) Total revenues for reportable segments $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,919 $ 1,176 $ 1,120 Nine Months Ended September 30, 2021 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,479 $ 1,325 $ 1,044 $ 1,924 $ 785 $ 535 $ 604 Small commercial & industrial 1,176 312 202 392 101 145 146 Large commercial & industrial 420 183 342 825 616 70 139 Public authorities & electric railroads 33 24 20 45 24 11 10 Other (a) 676 167 269 453 154 143 158 Total electric revenues (b) $ 4,784 $ 2,011 $ 1,877 $ 3,639 $ 1,680 $ 904 $ 1,057 Natural gas revenues Residential $ — $ 251 $ 354 $ 67 $ — $ 67 $ — Small commercial & industrial — 94 59 29 — 29 — Large commercial & industrial — — 103 5 — 5 — Transportation — 17 — 11 — 11 — Other (c) — 4 41 6 — 6 — Total natural gas revenues (d) $ — $ 366 $ 557 $ 118 $ — $ 118 $ — Total revenues from contracts with customers $ 4,784 $ 2,377 $ 2,434 $ 3,757 $ 1,680 $ 1,022 $ 1,057 Other revenues Revenues from alternative revenue programs $ 32 $ 20 $ (17) $ 94 $ 54 $ 17 $ 23 Other electric revenues (e) 24 2 7 3 2 1 — Other natural gas revenues (e) — — 2 — — — — Total other revenues $ 56 $ 22 $ (8) $ 97 $ 56 $ 18 $ 23 Total revenues for reportable segments $ 4,840 $ 2,399 $ 2,426 $ 3,854 $ 1,736 $ 1,040 $ 1,080 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • $14 million, $19 million at ComEd • $5 million, $5 million at PECO • $5 million, $10 million at BGE • $9 million, $10 million at PHI • $4 million, $4 million at Pepco • $5 million, $6 million at DPL • $2 million, $2 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • $1 million, $1 million at PECO • $7 million, $10 million at BGE (e) Includes late payment charge revenues.

Accounts Receivable (All Regist

Accounts Receivable (All Registrants)	9 Months Ended
Accounts Receivable (All Registrants)	Sep. 30, 2022
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 September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 Plus: Current period provision for expected credit losses (a) 38 10 12 2 14 6 1 7 Less: Write-offs, net of recoveries (b) 51 17 16 5 12 4 3 5 Balance as of September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 Three Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2021 $ 320 $ 89 $ 111 $ 27 $ 93 $ 38 $ 19 $ 36 Plus: Current period provision for expected credit losses (c) 37 11 1 7 18 5 3 10 Less: Write-offs, net of recoveries (b) 32 12 11 3 6 2 4 — Balance as of September 30, 2021 $ 325 $ 88 $ 101 $ 31 $ 105 $ 41 $ 18 $ 46 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2021 $ 320 $ 73 $ 105 $ 38 $ 104 $ 37 $ 18 $ 49 Plus: Current period provision for expected credit losses (d)(e) 141 31 33 30 47 23 8 16 Less: Write-offs, net of recoveries (b)(f) 120 30 35 14 40 16 6 18 Balance as of September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 Nine Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2020 $ 334 $ 97 $ 116 $ 35 $ 86 $ 32 $ 22 $ 32 Plus: Current period provision for expected credit losses (g) 65 23 7 2 33 15 4 14 Less: Write-offs, net of recoveries (b) 74 32 22 6 14 6 8 — Balance as of September 30, 2021 $ 325 $ 88 $ 101 $ 31 $ 105 $ 41 $ 18 $ 46 __________ (a) For ACE, the increase is primarily a result of increased receivable balances. (b) Recoveries were not material to the Registrants. (c) For ACE, the increase is primarily a result of increased aging of receivables and a slight decrease in the expected recovery rate. (d) For PECO, BGE, and DPL, the increase is primarily a result of increased receivable balances due to the increased aging of receivables. (e) For PHI, Pepco and ACE, the increase is primarily as a result of increased receivable balances. (f) For PECO, PHI, Pepco, and ACE, the increase in 2022 is primarily related to the termination of the moratoriums in Pennsylvania, the District of Columbia, and 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 throughout the year. (g) For PHI, Pepco, and ACE, the increase is primarily a result of increased aging of receivables and a slight decrease in the expected recovery rate. The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable. Three Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 14 Plus: Current period provision (benefit) for expected credit losses 8 2 2 2 2 2 (1) 1 Less: Write-offs, net of recoveries (a) 5 2 1 1 1 — — 1 Balance as of September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 Three Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2021 $ 71 $ 18 $ 7 $ 8 $ 38 $ 16 $ 9 $ 13 Plus: Current period provision (benefit) for expected credit losses 6 2 1 1 2 1 (1) 2 Less: Write-offs, net of recoveries (a) 4 1 1 1 — — — — Balance as of September 30, 2021 $ 73 $ 19 $ 7 $ 8 $ 40 $ 17 $ 8 $ 15 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2021 $ 72 $ 17 $ 7 $ 9 $ 39 $ 16 $ 8 $ 15 Plus: Current period provision (benefit) for expected credit losses 24 5 6 6 7 6 (1) 2 Less: Write-offs, net of recoveries (a) 12 4 2 3 3 — — 3 Balance as of September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 Nine Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2020 $ 71 $ 21 $ 8 $ 9 $ 33 $ 13 $ 9 $ 11 Plus: Current period provision (benefit) for expected credit losses 11 — 2 2 7 4 (1) 4 Less: Write-offs, net of recoveries (a) 9 2 3 3 — — — — Balance as of September 30, 2021 $ 73 $ 19 $ 7 $ 8 $ 40 $ 17 $ 8 $ 15 __________ (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 as of September 30, 2022 and December 31, 2021. Unbilled customer revenues (a) Exelon ComEd PECO BGE PHI Pepco DPL ACE September 30, 2022 $ 500 $ 126 $ 121 $ 102 $ 151 $ 74 $ 35 $ 42 December 31, 2021 747 240 161 171 175 82 53 40 __________ (a) Unbilled customer revenues are classified in Customer accounts receivables, 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 (a) ComEd PECO BGE (a) PHI Pepco DPL ACE Nine months ended September 30, 2022 $ 3,088 $ 753 $ 832 $ 607 $ 896 $ 559 $ 168 $ 169 Nine months ended September 30, 2021 2,962 810 795 531 826 504 166 156 __________

Asset Impairments (Exelon and B

Asset Impairments (Exelon and BGE)	9 Months Ended
Asset Impairments (Exelon and BGE)	Sep. 30, 2022
Impairment or Disposal of Tangible Assets Disclosure [Abstract]
Asset Impairments (Exelon and BGE)	Asset Impairments (Exelon and BGE) Asset Impairment In the third quarter of 2022, a review of the impacts of COVID-19 on office use resulted in plans to cease the renovation and dispose of an office building at BGE before the asset was placed into service. BGE determined that the carrying value was not recoverable and that its fair value was less than carrying value. As a result, in the third quarter of 2022, a pre-tax impairment charge of $46 million was recorded in Operating and maintenance expense in Exelon’s and BGE’s Consolidated Statements of Operations and Comprehensive Income. The office building did not meet all of the criteria for classification as held for sale as of September 30, 2022, and therefore continues to be reported within Property, plant and equipment in Exelon’s and BGE’s Balance Sheets as of September 30, 2022.

Income Taxes (All Registrants)

Income Taxes (All Registrants)	9 Months Ended
Income Taxes (All Registrants)	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes (All Registrants)	Income Taxes (All Registrants) Rate Reconciliation The effective income tax rate from continuing operations varies from the U.S. federal statutory rate principally due to the following: Three Months Ended September 30, 2022 (a) Exelon ComEd PECO (b) BGE (b) PHI (b) Pepco (b) DPL (b) ACE (b) U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of Federal income tax benefit 9.0 8.0 20.7 6.8 1.4 (2.7) 6.5 7.0 Plant basis differences (5.3) (0.4) (14.2) (2.6) (1.7) (2.3) (0.8) (1.0) Excess deferred tax amortization (11.6) (5.6) (3.2) (47.3) (19.3) (14.6) (21.7) (25.5) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.2) (0.1) — (0.2) (0.2) Tax credits (0.6) (0.4) — (1.9) (0.9) (0.8) (1.3) (0.7) Other (0.4) (0.1) 0.3 (2.7) 0.3 0.1 0.2 0.5 Effective income tax rate 12.0 % 22.4 % 24.6 % (26.9) % 0.7 % 0.7 % 3.7 % 1.1 % Three Months Ended September 30, 2021 (a) Exelon ComEd PECO (c) BGE (c) PHI Pepco 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 7.1 8.0 (4.1) (13.0) 5.0 3.4 6.4 7.0 Plant basis differences (4.7) (0.8) (16.2) (1.4) (1.3) (2.0) (0.6) (0.6) Excess deferred tax amortization (15.5) (7.6) (3.4) (17.3) (24.9) (17.6) (19.9) (41.4) 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 (0.6) (0.5) — (0.9) (0.5) (0.5) (0.4) (0.5) Other (0.1) 0.3 (0.1) (0.8) — 0.1 (0.6) 0.8 Effective income tax rate 7.1 % 20.3 % (2.8) % (12.5) % (0.8) % 4.4 % 5.7 % (13.9) % __________ (a) Positive percentages represent income tax expense. Negative percentages represent income tax benefit. (b) For PECO, the higher effective tax rate is related to a one-time state income expense, net of federal income tax benefit, of $38 million attributable to the change in the Pennsylvania corporate income tax rate partially offset by plant basis differences attributable to tax repair deductions. For BGE, PHI, Pepco, DPL, and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. (c) For PECO, the income tax benefit is primarily due to plant basis differences attributable to tax repair deductions. For BGE and ACE, the income tax benefit is primarily related to the acceleration of certain income tax benefits due to distribution rate case settlements. Nine Months Ended September 30, 2022 (a) Exelon ComEd PECO (b) BGE (b) PHI (b) Pepco (b) DPL (b) ACE (b) U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of Federal income tax benefit (c) 9.5 7.9 6.6 2.8 2.0 (3.2) 6.5 6.9 Plant basis differences (4.2) (0.5) (12.2) (1.1) (1.7) (2.4) (0.7) (1.1) Excess deferred tax amortization (11.3) (5.7) (3.2) (20.7) (18.8) (15.4) (20.4) (24.7) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.2) (0.2) Tax credits (d) 0.3 (0.3) — (0.7) (0.7) (0.6) (0.7) (0.6) Other (e) 2.8 — 0.2 (0.1) 0.2 (0.2) 0.3 0.2 Effective income tax rate 18.0 % 22.3 % 12.4 % 1.1 % 1.9 % (0.8) % 5.8 % 1.5 % Nine Months Ended September 30, 2021 (a) Exelon ComEd PECO (f) BGE (f) PHI Pepco DPL ACE (f) 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 3.8 7.6 (2.6) (10.8) 4.6 2.5 6.5 7.3 Plant basis differences (4.0) (0.7) (12.6) (1.5) (1.3) (1.9) (0.7) (0.6) Excess deferred tax amortization (13.5) (7.2) (3.3) (16.0) (22.8) (17.4) (19.7) (36.3) 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 (0.6) (0.5) — (0.9) (0.5) (0.5) (0.4) (0.5) Other (1.1) (1.3) (0.2) (0.7) (0.3) (0.4) (0.2) — Effective income tax rate 5.5 % 18.8 % 2.3 % (9.0) % 0.6 % 3.3 % 6.3 % (9.3) % __________ (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 partially offset by higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. For BGE, PHI, Pepco, DPL and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. (c) 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 $67 million and the recognition of a valuation allowance of $40 million against the net deferred tax asset position for certain standalone state filing jurisdictions, partially offset by a one-time impact associated with a state tax benefit of $43 million and indemnification adjustments pursuant to the Tax Matters Agreement of $4 million as a result of the separation. For PECO, the higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. (d) For Exelon, reflects the income tax expense related to the write-off of federal tax credits subject to recapture of $15 million as a result of the separation. (e) For Exelon, primarily reflects the nondeductible transaction costs of approximately $19 million arising as part of the separation and indemnification adjustments pursuant to the Tax Matters Agreement of $40 million. (f) For PECO, the lower effective tax rate is primarily due to plant basis differences attributable to tax repair deductions. For BGE and ACE, the income tax benefit is primarily related to the acceleration of certain income tax benefits due to distribution rate case settlements. Unrecognized Tax Benefits Exelon, PHI and ACE have the following unrecognized tax benefits as of September 30, 2022 and December 31, 2021. ComEd's, PECO's, BGE's, Pepco's, and DPL's amounts are not material. Exelon (a) PHI ACE September 30, 2022 $ 148 $ 59 $ 17 December 31, 2021 143 56 16 __________ (a) As of September 30, 2022, Exelon recorded a receivable of $50 million in Noncurrent other assets in the Consolidated Balance Sheet for Constellation’s share of unrecognized tax benefits for periods prior to the separation. Reasonably possible the total amount of unrecognized tax benefits could significantly increase or decrease within 12 months after the reporting date As of September 30, 2022, 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 Separation (Exelon) In the first quarter of 2022, in connection with the separation, Exelon recorded an income tax expense related to continuing operations of $148 million primarily due to the long-term marginal state income tax rate change of $67 million discussed further below, the recognition of valuation allowances of approximately $40 million against the net deferred tax assets positions for certain standalone state filing jurisdictions, the write-off of federal and state tax credits subject to recapture of $17 million, and nondeductible transaction costs for federal and state taxes of $24 million. 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 a result, Exelon recorded a receivable of $55 million in Current other assets in the Consolidated Balance Sheet for Constellation’s share of taxes for periods prior to the separation, as of March 31, 2022. As of September 30, 2022, the remaining amount of the receivable is $55 million. 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 March 31, 2022, Exelon recorded a payable of $11 million and $484 million in Current other liabilities and Noncurrent other liabilities, respectively, in the Consolidated Balance Sheet for tax credit carryforwards that are expected to be utilized and reimbursed to Constellation. As of September 30, 2022, the current and noncurrent payable amounts are $102 million and $392 million, respectively. Long-Term Marginal State Income Tax Rate (All Registrants) In the first quarter of 2022, Exelon updated its marginal state income tax rates for changes in state apportionment due to the separation, which resulted in an increase of $67 million to the deferred tax liability at Exelon, and a corresponding adjustment to income tax expense, net of federal taxes. Pennsylvania Corporate Income Tax Rate Change (Exelon and PECO) On July 8, 2022, Pennsylvania enacted House Bill 1342, which will permanently reduce the corporate income tax rate from 9.99% to 4.99%. The tax rate will be reduced to 8.99% for the 2023 tax year. Starting with the 2024 tax year, the rate is reduced by 0.50% annually until it reaches 4.99% in 2031. As a result of the rate change, in the third quarter of 2022, Exelon and PECO recorded a one-time decrease to deferred income taxes of $390 million with a corresponding decrease to the deferred income taxes regulatory asset of $428 million for the amounts that are expected to be settled through future customer rates and an increase to income tax expense of $38 million (net of federal taxes). The tax rate decrease is not expected to have a material ongoing impact to Exelon’s and PECO’s financial statements. Allocation of Tax Benefits (All Registrants) The Utility Registrants are party to an agreement with Exelon that provides for the allocation of consolidated tax liabilities and benefits (Tax Sharing Agreement). The Tax Sharing Agreement provides that each party is allocated an amount of tax similar to that which would be owed had the party been separately subject to tax. In addition, any net benefit attributable to Exelon is reallocated to the Utility Registrants. That allocation is treated as a contribution to capital from Exelon to the party receiving the benefit. The following table presents the allocation of tax benefits from Exelon under the Tax Sharing Agreement, for the nine months ended September 30, 2022 and 2021. ComEd PECO BGE PHI Pepco DPL ACE September 30, 2022 $ 1 $ 47 $ — $ 28 $ 23 $ 3 $ 2 September 30, 2021 1 19 — 17 16 — — Inflation Reduction Act (Exelon) On August 16, 2022, the Inflation Reduction Act (IRA) was signed into law. The bill extends tax benefits for renewable technologies like solar and wind, creates new tax benefits for alternative clean energy sources like nuclear and hydrogen and it focuses on energy efficiency, electrification, and equity. However, the bill also implements a new 15.0% corporate minimum tax based on adjusted GAAP net income. Exelon estimates the IRA could result in an increase in cash taxes for Exelon of approximately $200 million per year starting in 2023. Exelon is continuing to assess the impacts of the IRA on the financial statements and will update estimates based on guidance to be issued by the U.S. Treasury and IRS in the future.

Retirement Benefits (All Regist

Retirement Benefits (All Registrants)	9 Months Ended
Retirement Benefits (All Registrants)	Sep. 30, 2022
Retirement Benefits [Abstract]
Retirement Benefits (All Registrants)	Retirement Benefits (All Registrants) Defined Benefit Pension and OPEB Effective February 1, 2022, in connection with the separation, pension and OPEB obligations and assets for current and former employees of the Constellation business and certain other former employees of Exelon and its subsidiaries transferred to pension and OPEB plans and trusts maintained by Constellation or its subsidiaries. The Exelon New England Union Employees Pension Plan and Constellation Mystic Power, LLC Union Employees Pension Plan Including Plan A and Plan B were transferred. The following OPEB plans were also transferred: Constellation Mystic Power, LLC Post-Employment Medical Savings Account Plan, Exelon New England Union Post-Employment Medical Savings Account Plan, and the Nine Mile Point Nuclear Station, LLC Medical Care and Prescription Drug Plan for Retired Employees. As a result of the separation, Exelon restructured certain of its qualified pension plans. Pension obligations and assets for current and former employees continuing with Exelon and who were participants in the Exelon Employee Pension Plan for Clinton, TMI, and Oyster Creek, Pension Plan of Constellation Energy Nuclear Group, LLC, and Nine Mile Point Pension Plan were merged into the Pension Plan of Constellation Energy Group, Inc, which was subsequently renamed, Exelon Pension Plan (EPP). Exelon employees who participated in these plans prior to the separation now participate in the EPP. The merging of the plans did not change the benefits offered to the plan participants and, thus, had no impact on Exelon's pension obligations. The tables below show the pension and OPEB plans in which employees of each operating company participated as of September 30, 2022: Operating Company (a) Name of Plan: ComEd PECO BGE PHI Pepco DPL ACE Qualified Pension Plans: Exelon Corporation Retirement Program X X X X X X X Exelon Corporation Pension Plan for Bargaining Unit Employees X Exelon Pension Plan X X X X X X X Pepco Holdings LLC Retirement Plan X X X X X X X Non-Qualified Pension Plans: Exelon Corporation Supplemental Pension Benefit Plan and 2000 Excess Benefit Plan X X X Exelon Corporation Supplemental Management Retirement Plan X X X X X Constellation Energy Group, Inc. Senior Executive Supplemental Plan X X Constellation Energy Group, Inc. Supplemental Pension Plan X X Constellation Energy Group, Inc. Benefits Restoration Plan X X X Baltimore Gas & Electric Company Executive Benefit Plan X Baltimore Gas & Electric Company Manager Benefit Plan X X Pepco Holdings LLC 2011 Supplemental Executive Retirement Plan X X X X Conectiv Supplemental Executive Retirement Plan X X X Pepco Holdings LLC Combined Executive Retirement Plan X X Atlantic City Electric Director Retirement Plan X X Operating Company (a) Name of Plan: ComEd PECO BGE PHI Pepco DPL ACE OPEB Plans: PECO Energy Company Retiree Medical Plan X X X X X X X Exelon Corporation Health Care Program X X X X X X X Exelon Corporation Employees’ Life Insurance Plan X X X Exelon Corporation Health Reimbursement Arrangement Plan X X X BGE Retiree Medical Plan X X X X X X BGE Retiree Dental Plan X Exelon Retiree Medical Plan of Constellation Energy Nuclear Group, LLC X X X Exelon Retiree Dental Plan of Constellation Energy Nuclear Group, LLC X X X Pepco Holdings LLC Welfare Plan for Retirees X X X X X X X __________ (a) Employees generally remain in their legacy benefit plans when transferring between operating companies. As of February 1, 2022, in connection with the separation, Exelon's pension and OPEB plans were remeasured. The remeasurement and separation resulted in a decrease to the pension obligation, net of plan assets, of $921 million and a decrease to the OPEB obligation of $893 million. Additionally, accumulated other comprehensive loss, decreased by $1,994 million (after-tax) and regulatory assets and liabilities increased by $14 million and $5 million respectively. Key assumptions were held consistent with the year end December 31, 2021 assumptions with the exception of the discount rate. The majority of the 2022 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 3.24%. The majority of the 2022 OPEB cost is calculated using an expected long-term rate of return on plan assets of 6.44% for funded plans and a discount rate of 3.20%. During the first quarter of 2022, Exelon received an updated valuation of its pension and OPEB to reflect actual census data as of February 1, 2022. This valuation resulted in a decrease to the pension obligation of $24 million and an increase to the OPEB obligation of $5 million. Additionally, accumulated other comprehensive loss increased by $5 million (after-tax) and regulatory assets and liabilities decreased by $30 million and $3 million, respectively. A portion of the net periodic benefit cost for all plans is capitalized within the Consolidated Balance Sheets. The following table presents the components of Exelon's net periodic benefit costs, prior to capitalization, for the three and nine months ended September 30, 2022 and 2021. Pension Benefits OPEB Three Months Ended September 30, Three Months Ended September 30, 2022 2021 2022 2021 Components of net periodic benefit cost: Service cost $ 58 $ 74 $ 10 $ 13 Interest cost 110 102 19 18 Expected return on assets (205) (212) (25) (26) Amortization of: Prior service cost (credit) 1 1 (5) (6) Actuarial loss 73 100 4 7 Settlement charges — 2 — — Net periodic benefit cost $ 37 $ 67 $ 3 $ 6 Pension Benefits OPEB Nine Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Components of net periodic benefit cost: Service cost $ 177 $ 222 $ 30 $ 38 Interest cost 330 304 57 52 Expected return on assets (619) (633) (75) (75) Amortization of: Prior service cost (credit) 3 3 (15) (18) Actuarial loss 222 299 12 19 Curtailment benefits — — — (1) Settlement charges — 2 — — Net periodic benefit cost $ 113 $ 197 $ 9 $ 15 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, the service cost and non-service cost components are included in Operating and maintenance expense and Property, plant, and equipment, net in their consolidated financial statements. Three Months Ended September 30, Nine Months Ended September 30, Pension and OPEB Costs (Benefit) 2022 2021 2022 2021 Exelon $ 40 $ 73 $ 122 $ 212 ComEd 15 32 45 97 PECO (2) 2 (6) 5 BGE 11 16 33 47 PHI 13 12 39 36 Pepco 2 2 6 5 DPL 1 1 3 2 ACE 3 3 9 8 Defined Contribution Savings Plan The Registrants participate in a 401(k) defined contribution savings plan that is sponsored by Exelon. The plan is qualified under applicable sections of the IRC and allows employees to contribute a portion of their pre-tax and/or after-tax income in accordance with specified guidelines. All Registrants match a percentage of the employee contributions up to certain limits. The following table presents the employer contributions and employer matching contributions to the savings plan for the three and nine months ended September 30, 2022 and 2021. Three Months Ended September 30, Nine Months Ended September 30, Savings Plan Employer Contributions 2022 2021 2022 2021 Exelon $ 23 $ 24 $ 66 $ 67 ComEd 11 9 29 27 PECO 3 2 9 8 BGE 2 4 7 8 PHI 4 5 11 12 Pepco 1 1 3 3 DPL 1 1 3 3 ACE 1 1 2 2

Derivative Financial Instrument

Derivative Financial Instruments (All Registrants)	9 Months Ended
Derivative Financial Instruments (All Registrants)	Sep. 30, 2022
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. 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. 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. 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. 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 2021 Recast Form 10-K for additional information. (b) The fair value of the DPL economic hedge is not material as of September 30, 2022 and December 31, 2021. 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. The Mark-to-market derivative assets included in Other current assets in Exelon’s and ComEd’s Consolidated Balance Sheets were $24 million and none as of September 30, 2022 and December 31, 2021, respectively. Cash Flow Hedges (Interest Rate Risk) (Exelon) Exelon uses a combination of fixed-rate and variable-rate debt to manage interest rate exposure. In addition, Exelon may utilize interest rate derivatives to lock in rate levels in anticipation of future financings. In October 2022, Exelon entered into $840 million of notional amount floating-to-fixed forward starting interest rate swaps to manage a portion of interest rate exposure associated with anticipated debt issuances. The swaps are designated as cash flow hedges. Changes in fair value each period will initially be recorded in AOCI starting in the fourth quarter of 2022 and recognized in earnings as interest expense is accrued on the anticipated debt issuance. Economic Hedges (Interest Rate Risk) (Exelon) Exelon may use derivative instruments to mitigate exposure to fluctuations in interest rates but for which the fair value or cash flow hedge elections are not made. In October 2022, Exelon entered into $1,850 million of notional amount floating-to-fixed interest rate cap swaps to manage a portion of interest rate exposure in connection with borrowings. The swaps are not designated as cash flow hedges. As economic hedges, changes in fair value each period will be recognized in earnings starting in the fourth quarter of 2022. 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. As of September 30, 2022, the amount of cash collateral held with external counterparties by Exelon, ComEd, BGE, PHI, Pepco, DPL, and ACE was $505 million, $95 million, $129 million, $279 million, $48 million, $157 million, and $74 million, respectively, which is recorded in Other current liabilities in Exelon's, ComEd's, BGE's, PHI's, Pepco's, DPL's, and ACE's Consolidated Balance Sheets. The amount of cash collateral received from external counterparties increased as of September 30, 2022 due to rising energy prices. The amount for PECO was not material as of September 30, 2022. As of December 31, 2021, the amounts for ComEd and DPL were $41 million and $43 million, respectively. The amounts for Exelon, PECO, BGE, PHI, Pepco, and ACE were not material as of December 31, 2021.

Debt and Credit Agreements (All

Debt and Credit Agreements (All Registrants)	9 Months Ended
Debt and Credit Agreements (All Registrants)	Sep. 30, 2022
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 their 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 as of September 30, 2022 and December 31, 2021. PECO had no commercial paper borrowings as of September 30, 2022 and December 31, 2021. Outstanding Commercial Average Interest Rate on Commercial Paper Issuer September 30, 2022 December 31, 2021 September 30, 2022 December 31, 2021 Exelon (a) $ 615 $ 599 3.37 % 0.35 % ComEd 233 — 3.35 % — % BGE 156 130 3.40 % 0.37 % PHI (b) — 469 — % 0.35 % Pepco — 175 — % 0.33 % DPL — 149 — % 0.36 % ACE — 145 — % 0.35 % __________ (a) Exelon Corporate had $226 million of outstanding commercial paper borrowings at September 30, 2022 and no outstanding commercial paper borrowings as of December 31, 2021. (b) Represents the consolidated amounts of Pepco, DPL, and ACE. Revolving Credit Agreements On February 1, 2022, Exelon Corporate and the Utility Registrants each entered into a new 5-year revolving credit facility that replaced its existing syndicated revolving credit facility. The following table reflects the credit agreements: Borrower Aggregate Bank Commitment Interest Rate Exelon Corporate 900 SOFR plus 1.275 % ComEd 1,000 SOFR plus 1.000 % PECO 600 SOFR plus 0.900 % BGE 600 SOFR plus 0.900 % Pepco 300 SOFR plus 1.075 % DPL 300 SOFR plus 1.000 % ACE 300 SOFR plus 1.075 % Exelon Corporate and the Utility Registrants had no outstanding amounts on the revolving credit facilities as of September 30, 2022. On October 7, 2022, Exelon entered into new credit facility agreements, arranged at minority and community banks, which are solely utilized to issue letters of credit. The new 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 15 — Debt and Credit Agreements of the 2021 Recast 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 on March 14, 2022 and will expire on March 16, 2023. Pursuant to the loan agreement, loans made thereunder bear interest at a variable rate equal to SOFR plus 0.65% and all indebtedness thereunder is unsecured. The loan agreement is reflected in Exelon's Consolidated Balance Sheets within Short-term borrowings. On March 31, 2021, Exelon Corporate entered into a 364-day term loan agreement for $150 million with a variable interest rate of LIBOR plus 0.65% and an expiration date of March 30, 2022. Exelon Corporate repaid the term loan on March 30, 2022. In connection with the separation, on January 24, 2022, Exelon Corporate entered into a 364-day term loan agreement for $1.15 billion. The loan agreement will expire on January 23, 2023. Pursuant to the loan agreement, loans made thereunder bore interest at a variable rate equal to SOFR plus 0.75% until July 23, 2022 and a rate of SOFR plus 0.975% thereafter. All indebtedness pursuant to the loan agreement is unsecured. On August 11, 2022, Exelon Corporate made a partial repayment of $575 million on the term loan. The remaining $575 million outstanding balance was repaid on October 11, 2022 in conjunction with the $500 million 18-month term loan that was entered into on October 7, 2022. Refer to the Issuance of Long-Term Debt below for further information. 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 loan agreement will be reflected in Exelon's and ComEd's Consolidated Balance Sheets within Short-term borrowings in the fourth quarter of 2022. Long-Term Debt Issuance of Long-Term Debt During the nine months ended September 30, 2022, the following long-term debt was issued: Company (a) Type Interest Rate Maturity Amount Use of Proceeds Exelon SMBC Term Loan Agreement SOFR plus 0.65% July 21, 2023 (b) $300 Fund a cash payment to Constellation and for general corporate purposes. Exelon U.S. Bank Term Loan Agreement SOFR plus 0.65% July 21, 2023 (b) 300 Fund a cash payment to Constellation and for general corporate purposes. Exelon PNC Term Loan Agreement SOFR plus 0.65% July 24, 2023 (b) 250 Fund a cash payment to Constellation and for general corporate purposes. Exelon Notes (c) 2.75% March 15, 2027 650 Repay existing indebtedness and for general corporate purposes. Exelon Notes (c) 3.35% March 15, 2032 650 Repay existing indebtedness and for general corporate purposes. Exelon Notes (c) 4.10% March 15, 2052 700 Repay existing indebtedness and for general corporate purposes. Exelon Long-Term Software License Agreements 2.30% December 1, 2025 17 Procurement of software licenses ComEd First Mortgage Bonds, Series 132 3.15% March 15, 2032 300 Repay outstanding commercial paper obligations and to fund other general corporate purposes. ComEd First Mortgage Bonds, Series 133 3.85% March 15, 2052 450 Repay outstanding commercial paper obligations and to fund other general corporate purposes. PECO First and Refunding Mortgage Bonds 4.60% May 15, 2052 350 Refinance existing indebtedness and for general corporate purposes. PECO First and Refunding Mortgage Bonds 4.375% August 15, 2052 425 Refinance outstanding commercial paper and for general corporate purposes. BGE Notes 4.55% June 1, 2052 500 Repay outstanding commercial paper obligations, repay existing indebtedness, and for general corporate purposes. Pepco First Mortgage Bonds 3.97% March 24, 2052 400 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 3.35% September 15, 2032 225 Repay existing indebtedness and for general corporate purposes. DPL First Mortgage Bonds 3.06% February 15, 2052 125 Repay existing indebtedness and for general corporate purposes. ACE First Mortgage Bonds 2.27% February 15, 2032 25 Repay existing indebtedness and for general corporate purposes. ACE First Mortgage Bonds 3.06% February 15, 2052 150 Repay existing indebtedness and for general corporate purposes. __________ (a) On October 7, 2022, Exelon Corporate entered into an 18-month term loan agreement for $500 million with a variable rate equal to SOFR plus 0.85% and an expiration date of April 7, 2024. (b) During the third quarter of 2022, the SMBC Term Loan, U.S. Bank Term Loan, and PNC Term Loan were all reclassified to Long-term debt due within one year on the Exelon Consolidated Balance Sheet, given that the Term Loans have maturity dates of July 21, 2023, and July 24, 2023, respectively. (c) In connection with the issuance and sale of the Notes, Exelon entered into a Registration Rights Agreement with the representatives of the initial purchasers of the Notes and other parties. Pursuant to the Registration Rights Agreement, Exelon filed a registration statement on August 3, 2022, with respect to an offer to exchange the Notes for substantially similar notes of Exelon that are registered under the Securities Act. The registration statement became effective on August 19, 2022. The registered notes, when issued later in the fourth quarter, will have terms identical in all material respects to the Notes, except that their issuance will have been registered under the Securities Act. Long-Term Debt to Affiliates As of December 31, 2021, Exelon Corporate had $319 million recorded to intercompany notes receivable from Generation. See Note 15 — Debt and Credit Agreements of the 2021 Recast Form 10-K for additional information. In connection with the separation, on January 31, 2022, Exelon Corporate received cash from Generation of $258 million to settle the intercompany loan. Debt Covenants As of September 30, 2022, the Registrants are in compliance with debt covenants.

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities (All Registrants)	9 Months Ended
	Sep. 30, 2022
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 September 30, 2022 and December 31, 2021. The Registrants have no financial liabilities classified as Level 1. The carrying amounts of the Registrants’ short-term liabilities as presented in their Consolidated Balance Sheets are representative of their fair value (Level 2) because of the short-term nature of these instruments. September 30, 2022 December 31, 2021 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 $ 36,583 $ 28,654 $ 2,270 $ 30,924 $ 32,902 $ 34,897 $ 2,217 $ 37,114 ComEd 10,517 8,783 — 8,783 9,773 11,305 — 11,305 PECO 4,612 3,747 50 3,797 4,197 4,740 50 4,790 BGE 4,207 3,539 — 3,539 3,961 4,406 — 4,406 PHI 8,130 4,434 2,220 6,654 7,547 5,970 2,167 8,137 Pepco 3,752 2,179 1,174 3,353 3,445 3,201 975 4,176 DPL 1,938 1,143 446 1,589 1,810 1,426 552 1,978 ACE 1,758 903 600 1,503 1,582 1,091 641 1,732 Long-Term Debt to Financing Trusts Exelon $ 390 $ — $ 385 $ 385 $ 390 $ — $ 470 $ 470 ComEd 205 — 204 204 205 — 248 248 PECO 184 — 181 181 184 — 222 222 __________ (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 15 - Debt and Credit Agreements of the 2021 Recast 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 2021 Recast 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 as of September 30, 2022 and December 31, 2021: Exelon As of September 30, 2022 As of December 31, 2021 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 664 $ — $ — $ 664 $ 524 $ — $ — $ 524 Rabbi trust investments Cash equivalents 62 — — 62 60 — — 60 Mutual funds 49 — — 49 60 — — 60 Fixed income — 8 — 8 — 10 — 10 Life insurance contracts — 57 39 96 — 61 37 98 Rabbi trust investments subtotal 111 65 39 215 120 71 37 228 Mark-to-market derivative assets — — 24 24 — — — — Total assets 775 65 63 903 644 71 37 752 Liabilities Mark-to-market derivative liabilities — — (67) (67) — — (219) (219) Deferred compensation obligation — (68) — (68) — (131) — (131) Total liabilities — (68) (67) (135) — (131) (219) (350) Total net assets (liabilities) $ 775 $ (3) $ (4) $ 768 $ 644 $ (60) $ (182) $ 402 __________ (a) Exelon excludes cash of $384 million and $464 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $225 million and $49 million as of September 30, 2022 and December 31, 2021, respectively, and includes long-term restricted cash of $83 million and $44 million as of September 30, 2022 and December 31, 2021, respectively, which is reported in Other deferred debits in the Consolidated Balance Sheets. ComEd, PECO, and BGE ComEd PECO BGE As of September 30, 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) $ 354 $ — $ — $ 354 $ 10 $ — $ — $ 10 $ 1 $ — $ — $ 1 Rabbi trust investments Mutual funds — — — — 8 — — 8 7 — — 7 Life insurance contracts — — — — — 15 — 15 — — — — Rabbi trust investments subtotal — — — — 8 15 — 23 7 — — 7 Mark-to-market derivative assets (b) — — 24 24 — — — — — — — — Total assets 354 — 24 378 18 15 — 33 8 — — 8 Liabilities Mark-to-market derivative liabilities (b) — — (67) (67) — — — — — — — — Deferred compensation obligation — (7) — (7) — (7) — (7) — (4) — (4) Total liabilities — (7) (67) (74) — (7) — (7) — (4) — (4) Total net assets (liabilities) $ 354 $ (7) $ (43) $ 304 $ 18 $ 8 $ — $ 26 $ 8 $ (4) $ — $ 4 ComEd PECO BGE As of December 31, 2021 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) $ 237 $ — $ — $ 237 $ 9 $ — $ — $ 9 $ — $ — $ — $ — Rabbi trust investments Mutual funds — — — — 11 — — 11 14 — — 14 Life insurance contracts — — — — — 16 — 16 — — — — Rabbi trust investments subtotal — — — — 11 16 — 27 14 — — 14 Total assets 237 — — 237 20 16 — 36 14 — — 14 Liabilities Mark-to-market derivative liabilities (b) — — (219) (219) — — — — — — — — Deferred compensation obligation — (10) — (10) — (9) — (9) — (7) — (7) Total liabilities — (10) (219) (229) — (9) — (9) — (7) — (7) Total net assets (liabilities) $ 237 $ (10) $ (219) $ 8 $ 20 $ 7 $ — $ 27 $ 14 $ (7) $ — $ 7 __________ (a) ComEd excludes cash of $39 million and $105 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $95 million and $42 million as of September 30, 2022 and December 31, 2021, respectively, and includes long-term restricted cash of $83 million and $43 million as of September 30, 2022 and December 31, 2021, respectively, which is reported in Other deferred debits in the Consolidated Balance Sheets. PECO excludes cash of $93 million and $35 million as of September 30, 2022 and December 31, 2021, respectively. BGE excludes cash of $20 million and $51 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $129 million and $4 million as of September 30, 2022 and December 31, 2021, respectively. (b) The Level 3 balance consists of the current asset of $24 million and current and noncurrent liability of none and $67 million, respectively, as of September 30, 2022 and none, $18 million and $201 million, respectively, as of December 31, 2021 related to floating-to-fixed energy swap contracts with unaffiliated suppliers. PHI, Pepco, DPL, and ACE As of September 30, 2022 As of December 31, 2021 PHI Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 266 $ — $ — $ 266 $ 110 $ — $ — $ 110 Rabbi trust investments Cash equivalents 59 — — 59 59 — — 59 Mutual funds 10 — — 10 14 — — 14 Fixed income — 8 — 8 — 10 — 10 Life insurance contracts — 22 38 60 — 27 35 62 Rabbi trust investments subtotal 69 30 38 137 73 37 35 145 Total assets 335 30 38 403 183 37 35 255 Liabilities Deferred compensation obligation — (14) — (14) — (18) — (18) Total liabilities — (14) — (14) — (18) — (18) Total net assets $ 335 $ 16 $ 38 $ 389 $ 183 $ 19 $ 35 $ 237 Pepco DPL ACE As of September 30, 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) $ 76 $ — $ — $ 76 $ 157 $ — $ — $ 157 $ 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 135 22 38 195 157 — — 157 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 135 $ 21 $ 38 $ 194 $ 157 $ — $ — $ 157 $ 1 $ — $ — $ 1 Pepco DPL ACE As of December 31, 2021 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) $ 31 $ — $ — $ 31 $ 43 $ — $ — $ 43 $ — $ — $ — $ — Rabbi trust investments Cash equivalents 58 — — 58 — — — — — — — — Life insurance contracts — 27 35 62 — — — — — — — — Rabbi trust investments subtotal 58 27 35 120 — — — — — — — — Total assets 89 27 35 151 43 — — 43 — — — — Liabilities Deferred compensation obligation — (2) — (2) — — — — — — — — Total liabilities — (2) — (2) — — — — — — — — Total net assets $ 89 $ 25 $ 35 $ 149 $ 43 $ — $ — $ 43 $ — $ — $ — $ — __________ (a) PHI excludes cash of $186 million and $100 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $1 million and $3 million as of September 30, 2022 and December 31, 2021, respectively. Pepco excludes cash of $21 million and $34 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $1 million and $3 million as of September 30, 2022 and December 31, 2021, respectively. DPL excludes cash of $49 million and $28 million as of September 30, 2022 and December 31, 2021, respectively. ACE excludes cash of $111 million and $29 million as of September 30, 2022 and December 31, 2021, respectively. Reconciliation of Level 3 Assets and Liabilities The following tables present the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis during the three and nine months ended September 30, 2022 and 2021: Exelon ComEd PHI and Pepco Three Months Ended September 30, 2022 Total Mark-to-Market Life Insurance Contracts Balance as of June 30, 2022 $ (50) $ (88) $ 37 Total realized / unrealized gains Included in net income (a) 1 — 1 Included in regulatory assets/liabilities 45 45 (b) — Balance as of September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities as of September 30, 2022 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Three Months Ended September 30, 2021 Total Mark-to-Market Life Insurance Contracts Balance as of June 30, 2021 $ (231) $ (265) $ 34 Total realized / unrealized gains Included in regulatory assets 51 51 (b) — Balance as of September 30, 2021 $ (180) $ (214) $ 34 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities as of September 30, 2021 $ — $ — $ — Exelon ComEd PHI and Pepco Nine months ended September 30, 2022 Total Mark-to-Market Life Insurance Contracts Balance as of December 31, 2021 $ (182) $ (219) $ 35 Total realized / unrealized gains Included in net income (a) 3 — 3 Included in regulatory assets/liabilities 176 176 (b) — Transfers out of Level 3 (1) — — Balance as of September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities as of September 30, 2022 $ 3 $ — $ 3 Exelon ComEd PHI and Pepco Nine Months Ended September 30, 2021 Total Mark-to-Market Life Insurance Contracts Balance as of December 31, 2020 $ (267) $ (301) $ 34 Total realized / unrealized gains Included in net income (a) 2 — 2 Included in regulatory assets 87 87 (b) — Purchases, sales, and settlements Settlements (2) — (2) Balance as of September 30, 2021 $ (180) $ (214) $ 34 The amount of total gains included in income attributed to the change in unrealized gain related to assets and liabilities as of September 30, 2021 $ 2 $ — $ 2 __________ (a) Classified in Operating and maintenance expense in the Consolidated Statements of Operations and Comprehensive Income. (b) Includes $51 million of increases in fair value and a decrease for realized gains due to settlements of $6 million recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2022. Includes $49 million of increases in fair value and an increase for realized losses due to settlements of $2 million recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2021. Includes $179 million of increases in fair value and an decrease for realized losses due to settlements of $3 million recorded in purchase power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2022. Includes $72 million of increases in fair value and an increase for realized losses due to settlements of $15 million recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2021. (c) The balance consists of $24 million of current assets and current and noncurrent liability of none and $67 million, respectively, as of September 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 16 — Fair Value of Financial Assets and Liabilities of the 2021 Recast Form 10-K. Mark-to-Market 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 as of September 30, 2022 Fair Value as of December 31, 2021 Valuation Unobservable 2022 Range & Arithmetic Average 2021 Range & Arithmetic Average Mark-to-market derivatives $ (43) $ (219) Discounted Forward power price (a) $36.02 - $111.10 $50.61 $28.65 - $47.10 $33.96 ________ (a) An increase to the forward power price would increase the fair value.

Commitments and Contingencies (

Commitments and Contingencies (All Registrants)	9 Months Ended
Commitments and Contingencies (All Registrants)	Sep. 30, 2022
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 17 — Commitments and Contingencies of the 2021 Recast 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 as of September 30, 2022: Description Exelon PHI Pepco DPL ACE Total commitments $ 513 $ 320 $ 120 $ 89 $ 111 Remaining commitments (a) 57 50 41 6 3 __________ (a) Remaining commitments extend through 2026 and include rate credits, energy efficiency programs and delivery system modernization. In addition, DPL has committed to conducting three RFPs to procure up to a total of 120 MWs of wind RECs for the purpose of meeting Delaware's renewable portfolio standards. DPL has conducted two of the three wind REC RFPs. The first 40 MW wind REC tranche was conducted in 2017 and did not result in a purchase agreement. The second 40 MW wind REC tranche was conducted in 2018 and resulted in a proposed REC purchase agreement that was approved by the DEPSC in 2019. The RFP for the third and final 40 MW wind REC tranche was conducted in the second quarter of 2022, an evaluation of the proposals was completed in the third quarter and DPL has made a draft recommendation to the DEPSC. The DEPSC is reviewing DPL's recommendation. DPL expects to make a decision on a potential award in the fourth quarter of 2022. Commercial Commitments (All Registrants). The Registrants’ commercial commitments as of September 30, 2022, representing commitments potentially triggered by future events were as follows: Expiration within Total 2022 2023 2024 2025 2026 2027 and beyond Exelon Letters of credit $ 17 $ 5 $ 12 $ — $ — $ — $ — Surety bonds (a) 205 85 118 2 — — — Financing trust guarantees 378 — — — — — 378 Guaranteed lease residual values (b) 30 — 1 6 6 5 12 Total commercial commitments $ 630 $ 90 $ 131 $ 8 $ 6 $ 5 $ 390 ComEd Letters of credit $ 10 $ 2 $ 8 $ — $ — $ — $ — Surety bonds (a) 46 5 39 2 — — — Financing trust guarantees 200 — — — — — 200 Total commercial commitments $ 256 $ 7 $ 47 $ 2 $ — $ — $ 200 PECO Letters of credit $ 1 $ — $ 1 $ — $ — $ — $ — Surety bonds (a) 2 — 2 — — — — Financing trust guarantees 178 — — — — — 178 Total commercial commitments $ 181 $ — $ 3 $ — $ — $ — $ 178 BGE Letters of credit $ 3 $ 2 $ 1 $ — $ — $ — $ — Surety bonds (a) 2 1 1 — — — — Total commercial commitments $ 5 $ 3 $ 2 $ — $ — $ — $ — PHI Surety bonds (a) $ 96 $ 75 $ 21 $ — $ — $ — $ — Guaranteed lease residual values (b) 30 — 1 6 6 5 12 Total commercial commitments $ 126 $ 75 $ 22 $ 6 $ 6 $ 5 $ 12 Pepco Surety bonds (a) $ 85 $ 71 $ 14 $ — $ — $ — $ — Guaranteed lease residual values (b) 10 — — 2 2 2 4 Total commercial commitments $ 95 $ 71 $ 14 $ 2 $ 2 $ 2 $ 4 DPL Surety bonds (a) $ 7 $ 3 $ 4 $ — $ — $ — $ — Guaranteed lease residual values (b) 13 — — 3 3 2 5 Total commercial commitments $ 20 $ 3 $ 4 $ 3 $ 3 $ 2 $ 5 ACE Surety bonds (a) $ 4 $ 1 $ 3 $ — $ — $ — $ — Guaranteed lease residual values (b) 7 — 1 1 1 1 3 Total commercial commitments $ 11 $ 1 $ 4 $ 1 $ 1 $ 1 $ 3 __________ (a) Surety bonds — Guarantees issued related to contract and commercial agreements, excluding bid bonds. (b) Represents the maximum potential obligation in the event that the fair value of certain leased equipment and fleet vehicles is zero at the end of the maximum lease term. The lease term associated with these assets ranges from 1 to 8 years. The maximum potential obligation at the end of the minimum lease term would be $73 million guaranteed by Exelon and PHI, of which $24 million, $30 million, and $19 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 20 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 2023. • DPL has 1 site that is currently under study and the required cost at the site is not expected to be material. The historical nature of the MGP and gas purification sites and the fact that many of the sites have been buried and built over, impacts the ability to determine a precise estimate of the ultimate costs prior to initial sampling and determination of the exact scope and method of remedial activity. Management determines its best estimate of remediation costs using all available information at the time of each study, including probabilistic and deterministic modeling for ComEd and PECO, and the remediation standards currently required by the applicable state environmental agency. Prior to completion of any significant clean up, each site remediation plan is approved by the appropriate state environmental agency. ComEd, pursuant to an ICC order, and PECO, pursuant to a PAPUC order, are currently recovering environmental remediation costs of former MGP facility sites through customer rates. While BGE and DPL do not have riders for MGP clean-up costs, they have historically received recovery of actual clean-up costs in distribution rates. During the third quarter of 2022, ComEd and PECO completed an annual study of their future estimated MGP remediation requirements. The study resulted in a $60 million increase to the environmental liability and related regulatory asset for ComEd. The increase was primarily due to increased costs due to inflation and changes in remediation plans. The study did not result in a material change to the environmental liability for PECO. As of September 30, 2022 and December 31, 2021, the Registrants had accrued the following undiscounted amounts for environmental liabilities in Accrued expenses, Other current liabilities, and Other deferred credits and other liabilities in their respective Consolidated Balance Sheets: September 30, 2022 December 31, 2021 Total environmental Portion of total related to Total environmental Portion of total related to Exelon $ 405 $ 358 $ 352 $ 303 ComEd 328 328 279 279 PECO 25 24 22 20 BGE 7 6 6 4 PHI 41 — 42 — Pepco 39 — 40 — 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 developing a FS to evaluate possible remedial alternatives for submission to DOEE. The Court has established a schedule for completion of the FS, and approval by the DOEE, by March 16, 2023. After completion and approval of the FS, 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. 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 National Park Service (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 (District) on behalf of DOEE conveying a settlement offer to resolve all PRPs' liability to the District. Pepco responded on July 27, 2022 to enter into settlement discussions. 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 Natural Resources Damages (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 assessment 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. Litigation and Regulatory Matters Deferred Prosecution Agreement (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 party to the DPA, and therefore the investigation by the USAO into Exelon’s activities ended with no charges being brought against Exelon. The SEC’s investigation remains ongoing and Exelon and ComEd have cooperated fully and intend to continue to cooperate fully with the SEC. Exelon and ComEd cannot predict the outcome of the SEC investigation. No loss contingency has been reflected in Exelon's and ComEd's consolidated financial statements with respect to the SEC investigation, as this contingency is neither probable nor reasonably estimable at this time. 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 December 2, 2020, the court appointed interim lead plaintiffs in the federal cases which consisted of counsel for three of the four federal cases. These plaintiffs filed a consolidated complaint on January 5, 2021. CUB also filed its own complaint against ComEd only on the same day. The remaining federal case, Potter, et al. v. Exelon et al, differed from the other lawsuits as it named additional individual defendants not named in the consolidated complaint. However, the Potter plaintiffs voluntarily dismissed their complaint without prejudice on April 5, 2021. ComEd and Exelon moved to dismiss the consolidated class action complaint and CUB’s complaint on February 4, 2021 and briefing was completed on March 22, 2021. On March 25, 2021, the parties agreed, along with state court plaintiffs, discussed below, to jointly engage in mediation. The parties participated in a one-day mediation on June 7, 2021 but no settlement was reached. 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. • 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. Plaintiffs' opening appellate brief was filed on August 5, 2022. Exelon and ComEd's response is currently due November 18, 2022. • 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. The next court status is set for May 8, 2023. Discovery remains ongoing. • Several shareholders have sent letters to the Exelon Board of Directors from 2020 through May 2022 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. On February 3, 2022, the court granted an extension of the stay for another 120 days and directed the parties to file a status report on June 1, 2022. On June 1, 2022, the parties requested a further extension of the stay until September 14, 2022, which the court granted. On September 13, 2022, the court further extended the stay until December 16, 2022 and directed the parties to file a status report on December 9, 2022. • Two separate shareholder requests seeking review of certain Exelon books and records were received in August 2021 and January 2022. Exelon responded to both requests and both shareholders have since sent formal shareholder demands to the Exelon Board, as discussed above. No loss contingencies have been reflec ted in Exelon’s and ComEd’s consolidated financial statements with respect to these matters, as such contingencies are neither probable nor reasonably estimable at this time. 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 rejected an argument by the Illinois Attorney General, City of Chicago, and CUB that a costly permanent adjustment also needed to be made to ComEd's ratemaking capital structure on account of Exelon having funded ComEd's payment of the DPA fine with an equity infusion. On October 6, the ICC denied the application for rehearing filed by the Illinois Attorney General, City of Chicago, and CUB that specifically focused on their capital structure argument. An accrual for the amount of the voluntary customer refund has been recorded in Regulatory liabilities and Other deferred credits and other liabilities in Exelon’s and ComEd’s Consolidated Balance Sheets as of September 30, 2022. The ICC jurisdictional refund must be made in April 2023; the FERC jurisdictional refund will be made as part of the next transmission formula rate update proceeding in 2023. 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. 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. The plaintiffs filed their response brief on March 28, 2022 and the defendants filed their reply on April 11, 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. On October 21, 2022, the court granted plaintiffs additional time, until November 30, 2022, to file an amendment complaint. Defendants’ response to any amended complaint would be due January 20, 2023. 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 assessment of whether a loss is probable or

Shareholders' Equity (Exelon)

Shareholders' Equity (Exelon)	9 Months Ended
Shareholders' Equity (Exelon)	Sep. 30, 2022
Equity [Abstract]
Stockholders' Equity Note Disclosure	Shareholders' Equity (Exelon) Equity Securities Offering On August 4, 2022, Exelon entered into an agreement with certain underwriters in connection with an underwritten public offering (the “Offering”) of 11.3 million shares (the “Shares”) of its common stock, no par value (“Common Stock”). The Shares were sold to the underwriters at a price per share of $43.32. Exelon also granted the underwriters an option to purchase an additional 1.695 million shares of Common Stock also at the price per share of $43.32. On August 5, 2022, the underwriters exercised the option in full. The net proceeds from the Offering and the exercise of the underwriters’ option were $563 million before expenses paid by Exelon. Exelon used the proceeds together with available cash balances, to repay $575 million in borrowings under a $1.15 billion term loan credit facility. See Note 11 — Debt and Credit Agreements for additional information on Exelon’s term loan. 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 September 30, 2022, Exelon has not issued any shares of Common Stock under the ATM program and has not entered into any forward sale agreements.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Exelon)	9 Months Ended
Changes in Accumulated Other Comprehensive Income (Exelon)	Sep. 30, 2022
Changes in Accumulated Other Comprehensive Income [Abstract]
Changes in Accumulated Other Comprehensive Income	Changes in Accumulated Other Comprehensive Income (Exelon) The following tables present changes in Exelon's AOCI, net of tax, by component: Three Months Ended September 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of June 30, 2022 $ — $ (701) $ — $ (701) Amounts reclassified from AOCI — 9 — 9 Net current-period OCI — 9 — 9 Balance as of September 30, 2022 $ — $ (692) $ — $ (692) Three Months Ended September 30, 2021 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of June 30, 2021 $ (5) $ (3,264) $ (20) $ (3,289) OCI before reclassifications — 14 (3) 11 Amounts reclassified from AOCI — 55 — 55 Net current-period OCI — 69 (3) 66 Balance as of September 30, 2021 $ (5) $ (3,195) $ (23) $ (3,223) Nine Months Ended September 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of 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 — 33 — 33 Net current-period OCI — 35 — 35 Balance as of September 30, 2022 $ — $ (692) $ — $ (692) Nine Months Ended September 30, 2021 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of December 31, 2020 $ (5) $ (3,372) $ (23) $ (3,400) OCI before reclassifications (1) 15 — 14 Amounts reclassified from AOCI — 163 — 163 Net current-period OCI (1) 178 — 177 Balance as of September 30, 2021 $ (6) $ (3,194) $ (23) $ (3,223) __________ (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 9 — Retirement Benefits for additional information. See Exelon's Statements of Operations and Comprehensive Income for individual components of AOCI. The following table presents income tax benefit (expense) allocated to each component of Exelon's other comprehensive income (loss): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Pension and non-pension postretirement benefit plans: Prior service benefit reclassified to periodic benefit cost $ — $ 1 $ — $ 3 Actuarial loss reclassified to periodic benefit cost (3) (19) (11) (57) Pension and non-pension postretirement benefit plans valuation adjustment — (7) — (8)

Supplemental Financial Informat

Supplemental Financial Information (All Registrants)	9 Months Ended
Supplemental Financial Information (All Registrants)	Sep. 30, 2022
Supplemental Financial Information [Abstract]
Supplemental Financial Information (All Registrants)	Supplemental Financial Information (All Registrants) Supplemental Statement of Operations Information The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Operations and Comprehensive Income: Taxes other than income taxes Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2022 Utility taxes (a) $ 244 $ 84 $ 51 $ 22 $ 87 $ 79 $ 7 $ 1 Property 99 10 4 50 35 23 11 1 Payroll 28 7 5 4 7 2 1 — Three Months Ended September 30, 2021 Utility taxes (a) $ 215 $ 67 $ 41 $ 21 $ 86 $ 80 $ 6 $ — Property 98 13 5 46 34 23 10 1 Payroll 33 7 4 5 7 2 1 1 Nine Months Ended September 30, 2022 Utility taxes (a) $ 667 $ 233 $ 126 $ 70 $ 238 $ 216 $ 19 $ 3 Property 287 30 12 142 103 70 31 2 Payroll 92 21 14 13 21 5 4 2 Nine Months Ended September 30, 2021 Utility taxes (a) $ 592 $ 188 $ 107 $ 66 $ 231 $ 212 $ 17 $ 2 Property 271 30 13 131 97 65 30 2 Payroll 97 20 12 14 21 5 4 2 _________ (a) The Registrants' utility taxes represent municipal and state utility taxes and gross receipts taxes related to their operating revenues. The offsetting collection of utility taxes from customers is recorded in revenues in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. Other, Net Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2022 AFUDC — Equity $ 38 $ 10 $ 7 $ 5 $ 16 $ 12 $ 2 $ 2 Non-service net periodic benefit cost 16 — — — — — — — Three Months Ended September 30, 2021 AFUDC — Equity $ 36 $ 10 $ 7 $ 7 $ 12 $ 9 $ 2 $ 1 Non-service net periodic benefit cost 19 — — — — — — — Nine Months Ended September 30, 2022 AFUDC — Equity $ 112 $ 28 $ 22 $ 17 $ 45 $ 35 $ 5 $ 5 Non-service net periodic benefit cost 48 — — — — — — — Nine Months Ended September 30, 2021 AFUDC — Equity $ 99 $ 23 $ 19 $ 21 $ 36 $ 30 $ 4 $ 2 Non-service net periodic benefit cost 64 — — — — — — — Supplemental Cash Flow Information The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Cash Flows. Depreciation and amortization Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2022 Property, plant, and equipment (b) $ 2,024 $ 770 $ 267 $ 355 $ 502 $ 214 $ 141 $ 126 Amortization of regulatory assets (b) 532 212 10 115 195 98 31 66 Amortization of intangible assets, net (b) 10 — — — — — — — Amortization of energy contract assets and liabilities (c) 3 — — — — — — — Nuclear fuel (d) 66 — — — — — — — ARO accretion (e) 44 — — — — — — — Total depreciation, amortization, and accretion $ 2,679 $ 982 $ 277 $ 470 $ 697 $ 312 $ 172 $ 192 Nine Months Ended September 30, 2021 Property, plant, and equipment (b) $ 4,505 $ 721 $ 249 $ 324 $ 467 $ 204 $ 126 $ 115 Amortization of regulatory assets (b) 439 172 10 110 147 98 31 18 Amortization of intangible assets, net (b) 44 — — — — — — — Amortization of energy contract assets and liabilities (c) 23 — — — — — — — Nuclear fuel (d) 810 — — — — — — — ARO accretion (e) 383 — — — — — — — Total depreciation, amortization, and accretion $ 6,204 $ 893 $ 259 $ 434 $ 614 $ 302 $ 157 $ 133 __________ (a) Exelon's 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 Operating revenues or Purchased power and fuel expense in Exelon’s Consolidated Statements of Operations and Comprehensive Income. (d) Included in Purchased fuel expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. (e) Included in Operating and maintenance expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. Other non-cash operating activities Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2022 Pension and non-pension postretirement benefit costs $ 124 $ 45 $ (6) $ 34 $ 39 $ 6 $ 3 $ 9 Allowance for credit losses 130 40 32 18 42 21 9 12 Other decommissioning-related activity 36 — — — — — — — Energy-related options 60 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (92) (163) (1) 40 33 15 3 14 Long-term incentive plan 35 — — — — — — — Amortization of operating ROU asset 47 1 — 14 21 5 6 3 AFUDC — Equity (112) (28) (22) (17) (45) (35) (5) (5) Nine Months Ended September 30, 2021 Pension and non-pension postretirement benefit costs $ 304 $ 97 $ 5 $ 45 $ 36 $ 5 $ 2 $ 8 Allowance for credit losses 155 34 36 7 18 9 3 6 Other decommissioning-related activity (810) — — — — — — — Energy-related options 45 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (129) (32) (20) 17 (94) (54) (17) (23) Severance costs (67) 1 — — 1 — — — Long-term incentive plan 94 — — — — — — — Amortization of operating ROU asset 146 2 — 22 21 5 7 3 AFUDC — Equity (99) (23) (19) (21) (36) (30) (4) (2) __________ (a) Exelon's 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 2021 Recast 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 September 30, 2022 Cash and cash equivalents $ 446 $ 63 $ 94 $ 20 $ 219 $ 21 $ 49 $ 112 Restricted cash and cash equivalents 744 342 9 130 234 77 157 — Restricted cash included in other long-term assets 83 83 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,273 $ 488 $ 103 $ 150 $ 453 $ 98 $ 206 $ 112 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 long-term 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 September 30, 2021 Cash and cash equivalents $ 2,957 $ 241 $ 344 $ 225 $ 82 $ 19 $ 13 $ 16 Restricted cash and cash equivalents 473 276 8 27 71 41 26 5 Restricted cash included in other long-term assets 54 44 — — 9 — — 9 Total cash, restricted cash, and cash equivalents (a) $ 3,484 $ 561 $ 352 $ 252 $ 162 $ 60 $ 39 $ 30 December 31, 2020 Cash and cash equivalents $ 432 $ 83 $ 19 $ 144 $ 111 $ 30 $ 15 $ 17 Restricted cash and cash equivalents 349 279 7 1 39 35 — 3 Restricted cash included in other long-term assets 53 43 — — 10 — — 10 Cash, restricted cash, and cash equivalents from discontinued operations 332 — — — — — — — Total cash, restricted cash, and cash equivalents $ 1,166 $ 405 $ 26 $ 145 $ 160 $ 65 $ 15 $ 30 __________ (a) Exelon's amounts include amounts related to Generation prior to the separation. See Note 2 — Discontinued Operations for additional information. For additional information on restricted cash see Note 1 — Significant Accounting Policies of the 2021 Recast 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 September 30, 2022 Compensation-related accruals (a) $ 501 $ 152 $ 63 $ 56 $ 89 $ 26 $ 16 $ 13 Taxes accrued 317 115 41 85 90 67 12 4 Interest accrued 341 66 43 44 73 34 21 16 December 31, 2021 Compensation-related accruals (a) $ 596 $ 155 $ 77 $ 78 $ 113 $ 35 $ 20 $ 17 Taxes accrued 253 94 14 53 96 88 9 11 Interest accrued 297 116 41 44 52 28 8 11 __________ (a) Primarily includes accrued payroll, bonuses and other incentives, vacation, and benefits. Book Overdrafts (Exelon, PHI, DPL) Book overdrafts representing outstanding checks in excess of funds on deposit are included in Other current liabilities on the Registrants' Consolidated Balance Sheets. The balance of DPL's book overdrafts was $28 million and $4 million as of September 30, 2022 and December 31, 2021, respectively.

Related Party Transactions (All

Related Party Transactions (All Registrants)	9 Months Ended
Related Party Transactions (All Registrants)	Sep. 30, 2022
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 affiliates and an immaterial amount recorded as Operating and maintenance expense from affiliates at the Utility Registrants : Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 ComEd (a) $ — $ 94 $ 59 $ 256 PECO (b) — 59 33 142 BGE (c) — 65 18 195 PHI — 99 51 276 Pepco (d) — 69 39 199 DPL (e) — 25 10 63 ACE (f) — 5 2 14 __________ (a) ComEd had an ICC-approved RFP contract with Generation to provide a portion of ComEd’s electric supply requirements. ComEd also purchased RECs and ZECs from Generation. (b) PECO received electric supply from Generation under contracts executed through PECO’s competitive procurement process. In addition, PECO had a ten-year agreement with Generation to sell solar AECs. (c) BGE received a portion of its energy requirements from Generation under its MDPSC-approved market-based SOS and gas commodity programs. (d) Pepco received electric supply from Generation under contracts executed through Pepco's competitive procurement process approved by the MDPSC and DCPSC. (e) DPL received a portion of its energy requirements from Generation under its MDPSC and DEPSC approved market-based SOS commodity programs. (f) ACE received electric supply from Generation under contracts executed through ACE's competitive procurement process approved by the NJBPU. Service Company Costs for Corporate Support The Registrants receive a variety of corporate support services from BSC. Pepco, DPL, and ACE also receive corporate support services from PHISCO. See Note 1 — Significant Accounting Policies for additional information regarding BSC and PHISCO. The following table presents the service company costs allocated to the Registrants: Operating and maintenance from affiliates Capitalized costs Three Months Ended September 30, Nine Months Ended September 30, Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 2022 2021 2022 2021 Exelon BSC $ 156 $ 106 $ 500 $ 355 PHISCO 20 18 60 54 ComEd BSC $ 69 $ 71 $ 234 $ 214 70 47 222 148 PECO BSC 44 41 140 120 24 12 80 57 BGE BSC 46 45 148 133 26 20 86 62 PHI BSC 39 40 135 116 36 27 112 88 PHISCO — — — — 20 18 60 54 Pepco BSC 24 23 80 68 13 11 41 36 PHISCO 28 26 86 84 8 7 24 22 DPL BSC 16 14 51 43 11 10 34 29 PHISCO 24 24 73 73 7 6 20 17 ACE BSC 13 14 42 37 12 7 37 22 PHISCO 20 21 63 64 5 5 16 15 Current Receivables from/Payables to affiliates The following tables present current receivables from affiliates and current payables to affiliates: September 30, 2022 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 50 $ — $ 4 $ 54 PECO $ — — — — — 30 — 6 36 BGE — — — — — 31 — 1 32 PHI — — — — — — 4 — 10 14 Pepco — — — — — 14 13 1 28 DPL — — — — — 13 10 1 24 ACE — — — — — 10 9 1 20 Other 3 1 — — — 1 9 — 14 Total $ 3 $ 1 $ — $ — $ — $ 1 $ 161 $ 32 $ 24 $ 222 December 31, 2021 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE Generation BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 41 $ 71 $ — $ 9 $ 121 PECO $ — — — — — 30 36 — 4 70 BGE — — — — — 4 41 — 3 48 PHI — 1 — — — 1 — 5 — 9 16 Pepco — — 1 1 1 20 21 12 3 59 DPL — — — — — 4 17 11 1 33 ACE — — — — — 7 13 9 2 31 Generation 13 — — — — — 102 — 16 131 Other 3 — — — — — 11 — — 14 Total $ 16 $ 1 $ 1 $ — $ 1 $ 2 $ 117 $ 306 $ 32 $ 47 $ 523 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 money pool. Pepco, DPL, and ACE participate in the PHI intercompany money pool. Noncurrent Receivables from affiliates ComEd and PECO have noncurrent receivables with Generation as a result of the nuclear decommissioning contractual construct whereby, to the extent NDT funds are greater than the underlying ARO at the end of decommissioning, such amounts are due back to ComEd and PECO, as applicable, for payment to their respective customers. The receivables are recorded in Receivable related to Regulatory Agreement Units as of September 30, 2022 and in noncurrent Receivables from affiliates as of December 31, 2021. See Note 3 — Regulatory Matters of the Combined Notes to Consolidated Financial Statements of the 2021 Recast Form 10-K for additional information. Long-term debt to financing trusts The following table presents Long-term debt to financing trusts: September 30, 2022 December 31, 2021 Exelon ComEd PECO Exelon ComEd PECO ComEd Financing III $ 206 $ 205 $ — $ 206 $ 205 $ — PECO Trust III 81 — 81 81 — 81 PECO Trust IV 103 — 103 103 — 103 Total $ 390 $ 205 $ 184 $ 390 $ 205 $ 184

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2022
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 distribution and transmission 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, accounting, engineering, customer operations, distribution and transmission planning, asset management, system operations, and power procurement, to PHI operating companies. The costs of BSC and PHISCO are directly charged or allocated to the applicable subsidiaries. The results of Exelon’s corporate operations are presented as “Other” in the consolidated financial statements and include intercompany eliminations unless otherwise disclosed. The accompanying consolidated financial statements as of September 30, 2022 and for the three and nine months ended September 30, 2022 and 2021 are unaudited but, in the opinion of the management of each Registrant 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, 2021 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, 2022. 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, meets 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 all periods presented. See Note 2 — Discontinued Operations for additional information.

Discontinued Operations (Tables

Discontinued Operations (Tables) - Exelon Generation Co L L C [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
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 three months ended September 30, 2021 and the nine months ended September 30, 2022 and September 30, 2021. 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. Three Months Ended Nine Months Ended 2021 2022 2021 Operating revenues Competitive business revenues $ 4,083 $ 1,855 $ 13,250 Competitive business revenues from affiliates 325 161 873 Total operating revenues 4,408 2,016 14,123 Operating expenses Competitive businesses purchased power and fuel 1,545 1,138 8,102 Operating and maintenance (a) 845 371 3,132 Depreciation and amortization 866 94 2,735 Taxes other than income taxes 115 44 354 Total operating expenses 3,371 1,647 14,323 Gain on sales of assets and businesses 65 10 144 Operating income (loss) 1,102 379 (56) Other income and (deductions) Interest expense, net (73) (20) (214) Other, net (115) (281) 561 Total other (deductions) and income (188) (301) 347 Income before income taxes 914 78 291 Income taxes 139 (40) 152 Equity in losses of unconsolidated affiliates (3) (1) (5) Net income 772 117 134 Net income attributable to noncontrolling interests 26 1 126 Net income from discontinued operations $ 746 $ 116 $ 8 __________ (a) Includes transaction and transition costs related to the separation of $52 million for the nine months ended September 30, 2022 and $13 million and $19 million for the three and nine months ended September 30, 2021, respectively. See discussion above for additional information.
Discontinued Operations - Balance Sheet [Table Text Block]		The following table presents the assets and liabilities of discontinued operations in Exelon’s Consolidated Balance Sheet as of December 31, 2021: December 31, 2021 ASSETS Current assets Cash and cash equivalents $ 510 Restricted cash and cash equivalents 72 Accounts receivable Customer accounts receivable 1,724 Customer allowance for credit losses (55) Customer accounts receivable, net 1,669 Other accounts receivable 596 Other allowance for credit losses (4) Other accounts receivable, net 592 Mark-to-market derivative assets 2,169 Inventories, net Fossil fuel and emission allowances 284 Materials and supplies 1,004 Renewable energy credits 529 Assets held for sale 13 Other 993 Total current assets of discontinued operations 7,835 Property, plant, and equipment (net of accumulated depreciation and amortization of $15,888) 19,661 Deferred debits and other assets Nuclear decommissioning trust funds 15,938 Investments 193 Mark-to-market derivative assets 949 Other 1,768 Total property, plant, and equipment, deferred debits, and other assets of discontinued operations 38,509 Total assets of discontinued operations $ 46,344 December 31, 2021 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities Short-term borrowings $ 2,082 Long-term debt due within one year 1,220 Accounts payable 1,757 Accrued expenses 818 Mark-to-market derivative liabilities 981 Renewable energy credit obligation 779 Liabilities held for sale 3 Other 300 Total current liabilities of discontinued operations 7,940 Long-term debt 4,575 Deferred credits and other liabilities Deferred income taxes and unamortized investment tax credits 3,583 Asset retirement obligations 12,819 Pension obligations 939 Non-pension postretirement benefit obligations 876 Spent nuclear fuel obligation 1,210 Mark-to-market derivative liabilities 513 Other 1,161 Total long-term debt, deferred credits, and other liabilities of discontinued operations 25,676 Total liabilities of discontinued operations $ 33,616
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 nine months ended September 30, 2022 and September 30, 2021. Nine Months Ended 2022 2021 Non-cash items included in net income from discontinued operations: Depreciation, amortization, and accretion, including nuclear fuel and energy contract amortization $ 207 $ 3,951 Asset impairments — 537 Loss (gain) on sales of assets and businesses 9 (144) Deferred income taxes and amortization of investment tax credits (143) (242) Net fair value changes related to derivatives (59) (1,244) Net realized and unrealized losses (gains) on NDT fund investments 205 (383) Net unrealized losses on equity investments 16 83 Other decommissioning-related activity 36 (810) Cash flows from investing activities: Capital expenditures (227) (1,098) Collection of DPP 169 3,052 Supplemental cash flow information: Decrease in capital expenditures not paid (128) (77) Increase in DPP 348 2,933 Increase in PP&E related to ARO update 335 550

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
Regulatory Matters (Tables)	Sep. 30, 2022
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 2022. 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 16, 2021 Electric $ 51 $ 46 7.36 % December 1, 2021 January 1, 2022 PECO - Pennsylvania March 30, 2021 Electric 246 132 N/A (b) November 18, 2021 January 1, 2022 March 31, 2022 Natural Gas 82 55 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 - District of Columbia (d) May 30, 2019 (amended June 1, 2020) Electric 136 109 9.275 % June 8, 2021 July 1, 2021 Pepco - Maryland (e) October 26, 2020 (amended March 31, 2021) Electric 104 52 9.55 % June 28, 2021 June 28, 2021 DPL - Maryland (f) September 1, 2021 (amended December 23, 2021) Electric 27 13 9.60 % March 2, 2022 March 2, 2022 DPL - Delaware January 14, 2022 (amended August 15, 2022) Natural Gas 13 8 9.60 % October 12, 2022 November 1, 2022 ACE - New Jersey (g) December 9, 2020 (amended February 26, 2021) Electric 67 41 9.60 % July 14, 2021 January 1, 2022 __________ (a) ComEd's 2022 approved revenue requirement reflects an increase of $37 million for the initial year revenue requirement for 2022 and an increase of $9 million related to the annual reconciliation for 2020. The revenue requirement for 2022 provides for a weighted average debt and equity return on distribution rate base of 5.72%, inclusive of an allowed ROE of 7.36%, reflecting the monthly average yields for 30-year treasury bonds plus 580 basis points. The reconciliation revenue requirement for 2020 provides for a weighted average debt and equity return on distribution rate base of 5.69%, inclusive of an allowed ROE of 7.29%, reflecting the monthly yields on 30-year treasury bonds plus 580 basis points less a performance metrics penalty of 7 basis points. (b) The PECO electric and natural gas base rate case proceedings were resolved through settlement agreements, 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 cumulative multi-year plan with 18-months remaining in 2021 through 2022. The DCPSC awarded Pepco electric incremental revenue requirement increases of $42 million and $67 million, before offsets, for 2021 and 2022, respectively. However, the DCPSC utilized the acceleration of refunds for certain tax benefits along with other rate relief to partially offset the customer rate increases by $22 million and $40 million for 2021 and 2022, respectively. (e) 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. Whether certain tax benefits will be used to offset the customer rate increases for the 12-month period ending March 31, 2024 has not been decided, and Pepco cannot predict the outcome. (f) The approved settlement reflects a 9.60% ROE, which is solely for the purposes of calculating AFUDC and regulatory asset carrying costs. (g) Requested and approved increases are before New Jersey sales and use tax. The order allows ACE to retain approximately $11 million of certain tax benefits which resulted in a decrease to income tax expense in Exelon's, PHI's, and ACE's Consolidated Statements of Operations and Comprehensive Income in the third quarter of 2021. Pending Distribution Base Rate Case Proceedings Registrant/Jurisdiction Filing Date Service Requested Revenue Requirement Increase Requested ROE Expected Approval Timing ComEd - Illinois (a) April 15, 2022 Electric $ 199 7.85 % Fourth quarter of 2022 DPL - Maryland (b) May 19, 2022 Electric 38 10.25 % Fourth quarter of 2022 __________ (a) ComEd's 2023 requested revenue requirement 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 average monthly 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 average monthly yields for 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 as a result of the law authorizing the rate setting process sunsetting at the end of 2022. See Note 3 - Regulatory Matters of the 2021 Recast Form 10-K for additional information on ComEd's transition away from the electric distribution formula rate. (b) Reflects a three-year cumulative multi-year plan for January 1, 2023 to December 31, 2025 and total requested revenue requirement increases, before offsets, of $23 million effective January 1, 2023, $8 million effective January 1, 2024, and $7 million effective January 1, 2025, to recover capital investments made in 2021 and planned capital investments through the end of 2025. DPL proposed the acceleration of refunds for certain tax benefits to partially offset the customer rate increases by $12 million and $8 million in 2023 and 2024, respectively. On October 7, 2022, DPL filed a partial settlement agreement with the MDPSC. The partial settlement provides for a total requested revenue requirement increase of $29 million and requested ROE of 9.60%. The partial settlement reflects a three-year cumulative multi-year plan for January 1, 2023 to December 31, 2025 and total requested revenue increases of $17 million effective January 1, 2023, $6 million effective January 1, 2024, and $6 million effective January 1, 2025. While the pending base rate case filing is partially settled, there are no issues unsettled related to the requested revenue requirement increase and the requested ROE. While there will likely be no changes to the amended requested revenue requirement increase and requested ROE, DPL cannot predict the outcome of any unforeseen proceedings.
Public Utilities Transmission Rate Filings [Table Text Block]	For 2022, the following total increases/(decreases) were included in the Utility Registrants' electric transmission formula rate updates: Registrant (a) Initial Revenue Requirement Increase Annual Reconciliation (Decrease) Increase Total Revenue Requirement Increase Allowed Return on Rate Base (b) Allowed ROE (c) ComEd $ 24 $ (24) $ — 8.11 % 11.50 % PECO 23 16 39 7.30 % 10.35 % BGE 25 (4) 16 (d) 7.30 % 10.50 % Pepco 16 15 31 7.60 % 10.50 % DPL 9 2 11 7.09 % 10.50 % ACE 21 13 34 7.18 % 10.50 % __________ (a) All rates are effective June 1, 2022 - May 31, 2023, subject to review by interested parties pursuant to review protocols of each Utility Registrants' tariff. (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]	During 2022, the ICC approved the following total increases in ComEd's requested energy efficiency revenue requirement: Filing Date Requested Revenue Requirement Increase Approved Revenue Requirement Increase (a) Approved ROE Approval Date Rate Effective Date May 25, 2022 $ 50 $ 50 7.85 % October 27, 2022 January 1, 2023 __________
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. Exelon ComEd (a) PECO BGE (b) PHI Pepco (c) DPL (c) ACE (b) September 30, 2022 $ 49 $ 5 $ — $ 30 $ 14 $ 11 $ 2 $ 1 December 31, 2021 43 1 — 37 5 3 2 — __________ (a) Reflects ComEd's unrecognized equity returns earned for ratemaking purposes on its energy efficiency and electric distribution formula rate regulatory assets. (b) BGE's and ACE's authorized amounts capitalized for ratemaking purposes primarily relate to earnings on shareholder's investment on their respective AMI programs. (c) Pepco's and DPL's authorized amounts capitalized for ratemaking purposes relate to earnings on shareholder's investment on their respective AMI Programs and Energy Efficiency and Demand Response Programs, and for Pepco District of Columbia revenue decoupling program. The earnings on energy efficiency are on Pepco District of Columbia and DPL Delaware programs only.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
Revenue from Contracts with Customers (Tables)	Sep. 30, 2022
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 September 30, 2022. 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. 2022 2023 2024 2025 2026 and thereafter Total Exelon $ 2 $ 8 $ 6 $ 5 $ 82 $ 103 PHI 2 8 6 5 82 103 Pepco 2 6 5 5 65 83 DPL — 1 — — 9 10 ACE — 1 1 — 8 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 nine months ended September 30, 2022 and 2021. As of September 30, 2022 and December 31, 2021, ComEd's, PECO's, and BGE's contract liabilities were immaterial. Exelon (a) PHI (a) Pepco (a) DPL (a) ACE (a) Balance as of December 31, 2021 $ 109 $ 109 $ 87 $ 11 $ 11 Revenues recognized (2) (2) (2) — — Balance as of March 31, 2022 107 107 85 11 11 Revenues recognized (2) (2) (1) — (1) Balance as of June 30, 2022 105 105 84 11 10 Revenues recognized (2) (2) (1) (1) — Balance as of September 30, 2022 $ 103 $ 103 $ 83 $ 10 $ 10 Exelon (a) PHI (a) Pepco (a) DPL (a) ACE (a) Balance as of December 31, 2020 $ 118 $ 118 $ 94 $ 12 $ 12 Revenues recognized (2) (2) (2) — — Balance as of March 31, 2021 116 116 92 12 12 Revenues recognized (3) (3) (1) (1) (1) Balance as of June 30, 2021 113 113 91 11 11 Revenues recognized (2) (2) (2) — — Balance as of September 30, 2021 $ 111 $ 111 $ 89 $ 11 $ 11 __________ (a) Revenues recognized in the three and nine months ended September 30, 2022 and 2021, were included in the contract liabilities at December 31, 2021 and 2020, respectively.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
Segment Information (Tables)	Sep. 30, 2022
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 nine months ended September 30, 2022 and 2021 is as follows: Three Months Ended September 30, 2022 and 2021 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2022 Electric revenues $ 1,378 $ 941 $ 757 $ 1,557 $ — $ (12) $ 4,621 Natural gas revenues — 73 113 38 — — 224 Shared service and other revenues — — — 3 381 (384) — Total operating revenues $ 1,378 $ 1,014 $ 870 $ 1,598 $ 381 $ (396) $ 4,845 2021 Electric revenues $ 1,789 $ 762 $ 677 $ 1,444 $ — $ 20 $ 4,692 Natural gas revenues — 56 93 23 — (1) 171 Shared service and other revenues — — — 3 534 (537) — Total operating revenues $ 1,789 $ 818 $ 770 $ 1,470 $ 534 $ (518) $ 4,863 Intersegment revenues (c) : 2022 $ 6 $ 3 $ 3 $ 3 $ 378 $ (393) $ — 2021 9 2 7 3 531 (516) 36 Depreciation and amortization: 2022 $ 333 $ 92 $ 148 $ 238 $ 14 $ — $ 825 2021 304 86 142 210 16 — 758 Operating expenses: 2022 $ 913 $ 798 $ 810 $ 1,254 $ 439 $ (380) $ 3,834 2021 1,428 677 709 1,155 491 (353) 4,107 Interest expense, net: 2022 $ 104 $ 45 $ 39 $ 72 $ 105 $ — $ 365 2021 98 40 36 67 83 — 324 Income (loss) from continuing operations before income taxes: 2022 $ 375 $ 179 $ 26 $ 291 $ (103) $ — $ 768 2021 276 108 32 264 (34) (154) 492 Income Taxes: 2022 $ 84 $ 44 $ (7) $ 2 $ (31) $ — $ 92 2021 56 (3) (4) (2) (6) (6) 35 Net income (loss) from continuing operations: 2022 $ 291 $ 135 $ 33 $ 289 $ (71) $ (1) $ 676 2021 220 111 36 266 (27) (149) 457 Capital Expenditures: 2022 $ 593 $ 333 $ 340 $ 398 $ 8 $ — $ 1,672 2021 561 301 287 410 4 — 1,563 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 17 — Related Party Transactions for additional information on intersegment revenues. PHI: Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2022 Electric revenues $ 724 $ 374 $ 462 $ — $ (3) $ 1,557 Natural gas revenues — 38 — — — 38 Shared service and other revenues — — — 94 (91) 3 Total operating revenues $ 724 $ 412 $ 462 $ 94 $ (94) $ 1,598 2021 Electric revenues $ 660 $ 337 $ 451 $ — $ (4) $ 1,444 Natural gas revenues — 23 — — — 23 Shared service and other revenues — — — 92 (89) 3 Total operating revenues $ 660 $ 360 $ 451 $ 92 $ (93) $ 1,470 Intersegment revenues (c) : 2022 $ 2 $ 1 $ — $ 94 $ (94) $ 3 2021 2 2 1 91 (93) 3 Depreciation and amortization: 2022 $ 99 $ 59 $ 74 $ 6 $ — $ 238 2021 104 53 46 7 — 210 Operating expenses: 2022 $ 555 $ 345 $ 353 $ 96 $ (95) $ 1,254 2021 501 295 359 93 (93) 1,155 Interest expense, net: 2022 $ 37 $ 16 $ 17 $ 1 $ 1 $ 72 2021 35 15 14 3 — 67 Income (loss) before income taxes: 2022 $ 146 $ 54 $ 95 $ (4) $ — $ 291 2021 136 53 79 (4) — 264 Income Taxes: 2022 $ 1 $ 2 $ 1 $ (2) $ — $ 2 2021 6 3 (11) — — (2) Net income (loss): 2022 $ 145 $ 52 $ 94 $ (2) $ — $ 289 2021 130 50 90 (4) — 266 Capital Expenditures: 2022 $ 193 $ 100 $ 105 $ — $ — $ 398 2021 202 109 97 2 — 410 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon. The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Three Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 935 $ 620 $ 406 $ 808 $ 318 $ 207 $ 283 Small commercial & industrial 217 149 88 179 44 65 70 Large commercial & industrial (117) 93 158 401 303 43 55 Public authorities & electric railroads 3 8 7 16 9 4 3 Other (a) 246 71 101 166 57 55 54 Total electric revenues (b) $ 1,284 $ 941 $ 760 $ 1,570 $ 731 $ 374 $ 465 Natural gas revenues Residential $ — $ 46 $ 70 $ 10 $ — $ 10 $ — Small commercial & industrial — 20 13 6 — 6 — Large commercial & industrial — — 28 3 — 3 — Transportation — 5 — 3 — 3 — Other (c) — 2 2 16 — 16 — Total natural gas revenues (d) $ — $ 73 $ 113 $ 38 $ — $ 38 $ — Total revenues from contracts with customers $ 1,284 $ 1,014 $ 873 $ 1,608 $ 731 $ 412 $ 465 Other revenues Revenues from alternative revenue programs $ 88 $ (5) $ (8) $ (11) $ (8) $ — $ (3) Other electric revenues (e) 6 5 4 1 1 — — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ 94 $ — $ (3) $ (10) $ (7) $ — $ (3) Total revenues for reportable segments $ 1,378 $ 1,014 $ 870 $ 1,598 $ 724 $ 412 $ 462 Three Months Ended September 30, 2021 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 978 $ 509 $ 383 $ 782 $ 309 $ 198 $ 275 Small commercial & industrial 433 113 73 150 36 53 61 Large commercial & industrial 148 67 128 320 244 27 49 Public authorities & electric railroads 11 7 7 15 8 4 3 Other (a) 245 61 104 172 53 56 63 Total electric revenues (b) $ 1,815 $ 757 $ 695 $ 1,439 $ 650 $ 338 $ 451 Natural gas revenues Residential $ — $ 36 $ 57 $ 10 $ — $ 10 $ — Small commercial & industrial — 13 10 5 — 5 — Large commercial & industrial — — 22 2 — 2 — Transportation — 5 — 3 — 3 — Other (c) — 2 6 3 — 3 — Total natural gas revenues (d) $ — $ 56 $ 95 $ 23 $ — $ 23 $ — Total revenues from contracts with customers $ 1,815 $ 813 $ 790 $ 1,462 $ 650 $ 361 $ 451 Other revenues Revenues from alternative revenue programs $ (32) $ 3 $ (24) $ 6 $ 9 $ (2) $ — Other electric revenues (e) 6 2 3 2 1 1 — Other natural gas revenues (e) — — 1 — — — — Total other revenues $ (26) $ 5 $ (20) $ 8 $ 10 $ (1) $ — Total revenues for reportable segments $ 1,789 $ 818 $ 770 $ 1,470 $ 660 $ 360 $ 451 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • $6 million, $9 million at ComEd • $3 million, $2 million at PECO • $2 million, $4 million at BGE • $3 million, $3 million at PHI • $2 million, $2 million at Pepco • $1 million, $2 million at DPL • less than $1 million, $1 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • less than $1 million, less than $1 million at PECO • $1 million, $3 million at BGE (e) Includes late payment charge revenues. Nine Months Ended September 30, 2022 and 2021 ComEd PECO BGE PHI Other (a) Intersegment Exelon Operating revenues (b) : 2022 Electric revenues $ 4,536 $ 2,390 $ 2,122 $ 4,058 $ — $ (24) $ 13,082 Natural gas revenues — 487 688 157 — (2) 1,330 Shared service and other revenues — — — 8 1,342 (1,350) — Total operating revenues $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,342 $ (1,376) $ 14,412 2021 Electric revenues $ 4,840 $ 2,033 $ 1,866 $ 3,726 $ — $ 5 $ 12,470 Natural gas revenues — 366 560 118 — — 1,044 Shared service and other revenues — — — 10 1,549 (1,559) — Total operating revenues $ 4,840 $ 2,399 $ 2,426 $ 3,854 $ 1,549 $ (1,554) $ 13,514 Intersegment revenues (c) : 2022 $ 14 $ 5 $ 13 $ 9 $ 1,342 $ (1,377) $ 6 2021 19 6 20 10 1,542 (1,549) 48 Depreciation and amortization: 2022 $ 982 $ 277 $ 470 $ 697 $ 46 $ — $ 2,472 2021 893 259 434 614 52 1 2,253 Operating expenses: 2022 $ 3,357 $ 2,230 $ 2,446 $ 3,535 $ 1,524 $ (1,288) $ 11,804 2021 3,833 1,908 2,080 3,167 1,436 (1,067) 11,357 Interest expense, net: 2022 $ 308 $ 129 $ 110 $ 216 $ 300 $ — $ 1,063 2021 292 119 103 201 253 (1) 967 Income (loss) from continuing operations before income taxes: 2022 $ 909 $ 541 $ 270 $ 528 $ (228) $ (42) $ 1,978 2021 750 392 266 538 (116) (447) 1,383 Income Taxes: 2022 $ 203 $ 67 $ 3 $ 10 $ 82 $ (9) $ 356 2021 141 9 (24) 3 (27) (26) 76 Net income (loss) from continuing operations: 2022 $ 706 $ 474 $ 267 $ 518 $ (310) $ (33) $ 1,622 2021 609 383 290 535 (88) (422) 1,307 Capital Expenditures: 2022 $ 1,801 $ 991 $ 918 $ 1,174 $ 68 $ — $ 4,952 2021 1,723 878 907 1,299 65 — 4,872 Total assets: September 30, 2022 $ 38,582 $ 14,048 $ 12,932 $ 25,655 $ 6,341 $ (4,103) $ 93,455 December 31, 2021 36,470 13,824 12,324 24,744 7,626 (8,319) 86,669 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) See Note 17 — Related Party Transactions for additional information on intersegment revenues. PHI: Pepco DPL ACE Other (a) Intersegment PHI Operating revenues (b) : 2022 Electric revenues $ 1,919 $ 1,019 $ 1,120 $ — $ — $ 4,058 Natural gas revenues — 157 — — — 157 Shared service and other revenues — — — 298 (290) 8 Total operating revenues $ 1,919 $ 1,176 $ 1,120 $ 298 $ (290) $ 4,223 2021 Electric revenues $ 1,736 $ 922 $ 1,080 $ — $ (12) $ 3,726 Natural gas revenues — 118 — — — 118 Shared service and other revenues — — — 281 (271) 10 Total operating revenues $ 1,736 $ 1,040 $ 1,080 $ 281 $ (283) $ 3,854 Intersegment revenues (c) : 2022 $ 4 $ 5 $ 2 $ 288 $ (290) $ 9 2021 4 6 2 281 (283) 10 Depreciation and amortization: 2022 $ 312 $ 172 $ 192 $ 21 $ — $ 697 2021 302 157 133 22 — 614 Operating expenses: 2022 $ 1,588 $ 999 $ 947 $ 291 $ (290) $ 3,535 2021 1,396 858 911 285 (283) 3,167 Interest expense, net: 2022 $ 111 $ 48 $ 49 $ 7 $ 1 $ 216 2021 104 47 43 7 — 201 Income (loss) before income taxes: 2022 $ 259 $ 138 $ 133 $ (2) $ — $ 528 2021 273 144 129 (8) — 538 Income Taxes: 2022 $ (2) $ 8 $ 2 $ 2 $ — $ 10 2021 9 9 (12) (3) — 3 Net income (loss): 2022 $ 261 $ 130 $ 131 $ (4) $ — $ 518 2021 264 135 141 (5) — 535 Capital Expenditures: 2022 $ 595 $ 294 $ 284 $ 1 $ — $ 1,174 2021 641 320 336 2 — 1,299 Total assets: September 30, 2022 $ 10,349 $ 5,710 $ 4,966 $ 4,716 $ (86) $ 25,655 December 31, 2021 9,903 5,412 4,556 4,933 (60) 24,744 __________ (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 16 — Supplemental Financial Information for additional information on total utility taxes. (c) Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon. The following tables disaggregate the Registrants' revenues recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of electric sales and natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with the Utility Registrants, but exclude any intercompany revenues. Nine Months Ended September 30, 2022 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,610 $ 1,538 $ 1,158 $ 2,007 $ 826 $ 570 $ 611 Small commercial & industrial 953 386 239 461 117 173 171 Large commercial & industrial 48 229 418 1,056 806 99 151 Public authorities & electric railroads 22 23 20 47 25 11 11 Other (a) 718 202 297 524 157 168 190 Total electric revenues (b) $ 4,351 $ 2,378 $ 2,132 $ 4,095 $ 1,931 $ 1,021 $ 1,134 Natural gas revenues Residential $ — $ 335 $ 448 $ 77 $ — $ 77 $ — Small commercial & industrial — 125 77 35 — 35 — Large commercial & industrial — — 128 9 — 9 — Transportation — 19 — 11 — 11 — Other (c) — 7 50 25 — 25 — Total natural gas revenues (d) $ — $ 486 $ 703 $ 157 $ — $ 157 $ — Total revenues from contracts with customers $ 4,351 $ 2,864 $ 2,835 $ 4,252 $ 1,931 $ 1,178 $ 1,134 Other revenues Revenues from alternative revenue programs $ 163 $ 1 $ (40) $ (33) $ (15) $ (3) $ (14) Other electric revenues (e) 22 11 11 4 3 1 — Other natural gas revenues (e) — 1 4 — — — — Total other revenues $ 185 $ 13 $ (25) $ (29) $ (12) $ (2) $ (14) Total revenues for reportable segments $ 4,536 $ 2,877 $ 2,810 $ 4,223 $ 1,919 $ 1,176 $ 1,120 Nine Months Ended September 30, 2021 Revenues from contracts with customers ComEd PECO BGE PHI Pepco DPL ACE Electric revenues Residential $ 2,479 $ 1,325 $ 1,044 $ 1,924 $ 785 $ 535 $ 604 Small commercial & industrial 1,176 312 202 392 101 145 146 Large commercial & industrial 420 183 342 825 616 70 139 Public authorities & electric railroads 33 24 20 45 24 11 10 Other (a) 676 167 269 453 154 143 158 Total electric revenues (b) $ 4,784 $ 2,011 $ 1,877 $ 3,639 $ 1,680 $ 904 $ 1,057 Natural gas revenues Residential $ — $ 251 $ 354 $ 67 $ — $ 67 $ — Small commercial & industrial — 94 59 29 — 29 — Large commercial & industrial — — 103 5 — 5 — Transportation — 17 — 11 — 11 — Other (c) — 4 41 6 — 6 — Total natural gas revenues (d) $ — $ 366 $ 557 $ 118 $ — $ 118 $ — Total revenues from contracts with customers $ 4,784 $ 2,377 $ 2,434 $ 3,757 $ 1,680 $ 1,022 $ 1,057 Other revenues Revenues from alternative revenue programs $ 32 $ 20 $ (17) $ 94 $ 54 $ 17 $ 23 Other electric revenues (e) 24 2 7 3 2 1 — Other natural gas revenues (e) — — 2 — — — — Total other revenues $ 56 $ 22 $ (8) $ 97 $ 56 $ 18 $ 23 Total revenues for reportable segments $ 4,840 $ 2,399 $ 2,426 $ 3,854 $ 1,736 $ 1,040 $ 1,080 __________ (a) Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue. (b) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • $14 million, $19 million at ComEd • $5 million, $5 million at PECO • $5 million, $10 million at BGE • $9 million, $10 million at PHI • $4 million, $4 million at Pepco • $5 million, $6 million at DPL • $2 million, $2 million at ACE (c) Includes revenues from off-system natural gas sales. (d) Includes operating revenues from affiliates in 2022 and 2021 respectively of: • $1 million, $1 million at PECO • $7 million, $10 million at BGE (e) Includes late payment charge revenues.

Accounts Receivable (Tables)

Accounts Receivable (Tables)	9 Months Ended
Accounts Receivable (Tables)	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Allowance for credit loss rollforward	The following tables present the rollforward of Allowance for Credit Losses on Customer Accounts Receivable. Three Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2022 $ 354 $ 81 $ 107 $ 57 $ 109 $ 42 $ 22 $ 45 Plus: Current period provision for expected credit losses (a) 38 10 12 2 14 6 1 7 Less: Write-offs, net of recoveries (b) 51 17 16 5 12 4 3 5 Balance as of September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 Three Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2021 $ 320 $ 89 $ 111 $ 27 $ 93 $ 38 $ 19 $ 36 Plus: Current period provision for expected credit losses (c) 37 11 1 7 18 5 3 10 Less: Write-offs, net of recoveries (b) 32 12 11 3 6 2 4 — Balance as of September 30, 2021 $ 325 $ 88 $ 101 $ 31 $ 105 $ 41 $ 18 $ 46 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2021 $ 320 $ 73 $ 105 $ 38 $ 104 $ 37 $ 18 $ 49 Plus: Current period provision for expected credit losses (d)(e) 141 31 33 30 47 23 8 16 Less: Write-offs, net of recoveries (b)(f) 120 30 35 14 40 16 6 18 Balance as of September 30, 2022 $ 341 $ 74 $ 103 $ 54 $ 111 $ 44 $ 20 $ 47 Nine Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2020 $ 334 $ 97 $ 116 $ 35 $ 86 $ 32 $ 22 $ 32 Plus: Current period provision for expected credit losses (g) 65 23 7 2 33 15 4 14 Less: Write-offs, net of recoveries (b) 74 32 22 6 14 6 8 — Balance as of September 30, 2021 $ 325 $ 88 $ 101 $ 31 $ 105 $ 41 $ 18 $ 46 __________ (a) For ACE, the increase is primarily a result of increased receivable balances. (b) Recoveries were not material to the Registrants. (c) For ACE, the increase is primarily a result of increased aging of receivables and a slight decrease in the expected recovery rate. (d) For PECO, BGE, and DPL, the increase is primarily a result of increased receivable balances due to the increased aging of receivables. (e) For PHI, Pepco and ACE, the increase is primarily as a result of increased receivable balances. (f) For PECO, PHI, Pepco, and ACE, the increase in 2022 is primarily related to the termination of the moratoriums in Pennsylvania, the District of Columbia, and 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 throughout the year. (g) For PHI, Pepco, and ACE, the increase is primarily a result of increased aging of receivables and a slight decrease in the expected recovery rate. The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable. Three Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2022 $ 81 $ 18 $ 10 $ 11 $ 42 $ 20 $ 8 $ 14 Plus: Current period provision (benefit) for expected credit losses 8 2 2 2 2 2 (1) 1 Less: Write-offs, net of recoveries (a) 5 2 1 1 1 — — 1 Balance as of September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 Three Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of June 30, 2021 $ 71 $ 18 $ 7 $ 8 $ 38 $ 16 $ 9 $ 13 Plus: Current period provision (benefit) for expected credit losses 6 2 1 1 2 1 (1) 2 Less: Write-offs, net of recoveries (a) 4 1 1 1 — — — — Balance as of September 30, 2021 $ 73 $ 19 $ 7 $ 8 $ 40 $ 17 $ 8 $ 15 Nine Months Ended September 30, 2022 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2021 $ 72 $ 17 $ 7 $ 9 $ 39 $ 16 $ 8 $ 15 Plus: Current period provision (benefit) for expected credit losses 24 5 6 6 7 6 (1) 2 Less: Write-offs, net of recoveries (a) 12 4 2 3 3 — — 3 Balance as of September 30, 2022 $ 84 $ 18 $ 11 $ 12 $ 43 $ 22 $ 7 $ 14 Nine Months Ended September 30, 2021 Exelon ComEd PECO BGE PHI Pepco DPL ACE Balance as of December 31, 2020 $ 71 $ 21 $ 8 $ 9 $ 33 $ 13 $ 9 $ 11 Plus: Current period provision (benefit) for expected credit losses 11 — 2 2 7 4 (1) 4 Less: Write-offs, net of recoveries (a) 9 2 3 3 — — — — Balance as of September 30, 2021 $ 73 $ 19 $ 7 $ 8 $ 40 $ 17 $ 8 $ 15 __________ (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 as of September 30, 2022 and December 31, 2021. Unbilled customer revenues (a) Exelon ComEd PECO BGE PHI Pepco DPL ACE September 30, 2022 $ 500 $ 126 $ 121 $ 102 $ 151 $ 74 $ 35 $ 42 December 31, 2021 747 240 161 171 175 82 53 40 __________ (a) Unbilled customer revenues are classified in Customer accounts receivables, 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 (a) ComEd PECO BGE (a) PHI Pepco DPL ACE Nine months ended September 30, 2022 $ 3,088 $ 753 $ 832 $ 607 $ 896 $ 559 $ 168 $ 169 Nine months ended September 30, 2021 2,962 810 795 531 826 504 166 156 __________

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
Income Taxes (Tables)	Sep. 30, 2022
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 September 30, 2022 (a) Exelon ComEd PECO (b) BGE (b) PHI (b) Pepco (b) DPL (b) ACE (b) U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of Federal income tax benefit 9.0 8.0 20.7 6.8 1.4 (2.7) 6.5 7.0 Plant basis differences (5.3) (0.4) (14.2) (2.6) (1.7) (2.3) (0.8) (1.0) Excess deferred tax amortization (11.6) (5.6) (3.2) (47.3) (19.3) (14.6) (21.7) (25.5) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.2) (0.1) — (0.2) (0.2) Tax credits (0.6) (0.4) — (1.9) (0.9) (0.8) (1.3) (0.7) Other (0.4) (0.1) 0.3 (2.7) 0.3 0.1 0.2 0.5 Effective income tax rate 12.0 % 22.4 % 24.6 % (26.9) % 0.7 % 0.7 % 3.7 % 1.1 % Three Months Ended September 30, 2021 (a) Exelon ComEd PECO (c) BGE (c) PHI Pepco 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 7.1 8.0 (4.1) (13.0) 5.0 3.4 6.4 7.0 Plant basis differences (4.7) (0.8) (16.2) (1.4) (1.3) (2.0) (0.6) (0.6) Excess deferred tax amortization (15.5) (7.6) (3.4) (17.3) (24.9) (17.6) (19.9) (41.4) 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 (0.6) (0.5) — (0.9) (0.5) (0.5) (0.4) (0.5) Other (0.1) 0.3 (0.1) (0.8) — 0.1 (0.6) 0.8 Effective income tax rate 7.1 % 20.3 % (2.8) % (12.5) % (0.8) % 4.4 % 5.7 % (13.9) % __________ (a) Positive percentages represent income tax expense. Negative percentages represent income tax benefit. (b) For PECO, the higher effective tax rate is related to a one-time state income expense, net of federal income tax benefit, of $38 million attributable to the change in the Pennsylvania corporate income tax rate partially offset by plant basis differences attributable to tax repair deductions. For BGE, PHI, Pepco, DPL, and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. (c) For PECO, the income tax benefit is primarily due to plant basis differences attributable to tax repair deductions. For BGE and ACE, the income tax benefit is primarily related to the acceleration of certain income tax benefits due to distribution rate case settlements. Nine Months Ended September 30, 2022 (a) Exelon ComEd PECO (b) BGE (b) PHI (b) Pepco (b) DPL (b) ACE (b) U.S. Federal statutory rate 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % 21.0 % Increase (decrease) due to: State income taxes, net of Federal income tax benefit (c) 9.5 7.9 6.6 2.8 2.0 (3.2) 6.5 6.9 Plant basis differences (4.2) (0.5) (12.2) (1.1) (1.7) (2.4) (0.7) (1.1) Excess deferred tax amortization (11.3) (5.7) (3.2) (20.7) (18.8) (15.4) (20.4) (24.7) Amortization of investment tax credit, including deferred taxes on basis difference (0.1) (0.1) — (0.1) (0.1) — (0.2) (0.2) Tax credits (d) 0.3 (0.3) — (0.7) (0.7) (0.6) (0.7) (0.6) Other (e) 2.8 — 0.2 (0.1) 0.2 (0.2) 0.3 0.2 Effective income tax rate 18.0 % 22.3 % 12.4 % 1.1 % 1.9 % (0.8) % 5.8 % 1.5 % Nine Months Ended September 30, 2021 (a) Exelon ComEd PECO (f) BGE (f) PHI Pepco DPL ACE (f) 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 3.8 7.6 (2.6) (10.8) 4.6 2.5 6.5 7.3 Plant basis differences (4.0) (0.7) (12.6) (1.5) (1.3) (1.9) (0.7) (0.6) Excess deferred tax amortization (13.5) (7.2) (3.3) (16.0) (22.8) (17.4) (19.7) (36.3) 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 (0.6) (0.5) — (0.9) (0.5) (0.5) (0.4) (0.5) Other (1.1) (1.3) (0.2) (0.7) (0.3) (0.4) (0.2) — Effective income tax rate 5.5 % 18.8 % 2.3 % (9.0) % 0.6 % 3.3 % 6.3 % (9.3) % __________ (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 partially offset by higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. For BGE, PHI, Pepco, DPL and ACE, the lower effective tax rate is primarily related to the acceleration of certain income tax benefits due to distribution and transmission rate case settlements. (c) 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 $67 million and the recognition of a valuation allowance of $40 million against the net deferred tax asset position for certain standalone state filing jurisdictions, partially offset by a one-time impact associated with a state tax benefit of $43 million and indemnification adjustments pursuant to the Tax Matters Agreement of $4 million as a result of the separation. For PECO, the higher state income taxes, net of federal income tax benefit, related to a one-time expense of $38 million attributable to the change in the Pennsylvania corporate income tax rate. (d) For Exelon, reflects the income tax expense related to the write-off of federal tax credits subject to recapture of $15 million as a result of the separation. (e) For Exelon, primarily reflects the nondeductible transaction costs of approximately $19 million arising as part of the separation and indemnification adjustments pursuant to the Tax Matters Agreement of $40 million.
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Exelon, PHI and ACE have the following unrecognized tax benefits as of September 30, 2022 and December 31, 2021. ComEd's, PECO's, BGE's, Pepco's, and DPL's amounts are not material. Exelon (a) PHI ACE September 30, 2022 $ 148 $ 59 $ 17 December 31, 2021 143 56 16 __________
Allocation of Tax Benefits	The following table presents the allocation of tax benefits from Exelon under the Tax Sharing Agreement, for the nine months ended September 30, 2022 and 2021. ComEd PECO BGE PHI Pepco DPL ACE September 30, 2022 $ 1 $ 47 $ — $ 28 $ 23 $ 3 $ 2 September 30, 2021 1 19 — 17 16 — —

Retirement Benefits (Tables)

Retirement Benefits (Tables)	9 Months Ended
Retirement Benefits (Tables)	Sep. 30, 2022
Retirement Benefits [Abstract]
Calculation of Net Periodic Benefit Costs	A portion of the net periodic benefit cost for all plans is capitalized within the Consolidated Balance Sheets. The following table presents the components of Exelon's net periodic benefit costs, prior to capitalization, for the three and nine months ended September 30, 2022 and 2021. Pension Benefits OPEB Three Months Ended September 30, Three Months Ended September 30, 2022 2021 2022 2021 Components of net periodic benefit cost: Service cost $ 58 $ 74 $ 10 $ 13 Interest cost 110 102 19 18 Expected return on assets (205) (212) (25) (26) Amortization of: Prior service cost (credit) 1 1 (5) (6) Actuarial loss 73 100 4 7 Settlement charges — 2 — — Net periodic benefit cost $ 37 $ 67 $ 3 $ 6 Pension Benefits OPEB Nine Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Components of net periodic benefit cost: Service cost $ 177 $ 222 $ 30 $ 38 Interest cost 330 304 57 52 Expected return on assets (619) (633) (75) (75) Amortization of: Prior service cost (credit) 3 3 (15) (18) Actuarial loss 222 299 12 19 Curtailment benefits — — — (1) Settlement charges — 2 — — Net periodic benefit cost $ 113 $ 197 $ 9 $ 15
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, the service cost and non-service cost components are included in Operating and maintenance expense and Property, plant, and equipment, net in their consolidated financial statements. Three Months Ended September 30, Nine Months Ended September 30, Pension and OPEB Costs (Benefit) 2022 2021 2022 2021 Exelon $ 40 $ 73 $ 122 $ 212 ComEd 15 32 45 97 PECO (2) 2 (6) 5 BGE 11 16 33 47 PHI 13 12 39 36 Pepco 2 2 6 5 DPL 1 1 3 2 ACE 3 3 9 8
Defined Contribution Savings Plans	The Registrants participate in a 401(k) defined contribution savings plan that is sponsored by Exelon. The plan is qualified under applicable sections of the IRC and allows employees to contribute a portion of their pre-tax and/or after-tax income in accordance with specified guidelines. All Registrants match a percentage of the employee contributions up to certain limits. The following table presents the employer contributions and employer matching contributions to the savings plan for the three and nine months ended September 30, 2022 and 2021. Three Months Ended September 30, Nine Months Ended September 30, Savings Plan Employer Contributions 2022 2021 2022 2021 Exelon $ 23 $ 24 $ 66 $ 67 ComEd 11 9 29 27 PECO 3 2 9 8 BGE 2 4 7 8 PHI 4 5 11 12 Pepco 1 1 3 3 DPL 1 1 3 3 ACE 1 1 2 2

Debt and Credit Agreements (Tab

Debt and Credit Agreements (Tables)	9 Months Ended
Debt and Credit Agreements (Tables)	Sep. 30, 2022
Debt Instrument [Line Items]
Schedule of Commercial Paper Borrowings	The following table reflects the Registrants' commercial paper programs as of September 30, 2022 and December 31, 2021. PECO had no commercial paper borrowings as of September 30, 2022 and December 31, 2021. Outstanding Commercial Average Interest Rate on Commercial Paper Issuer September 30, 2022 December 31, 2021 September 30, 2022 December 31, 2021 Exelon (a) $ 615 $ 599 3.37 % 0.35 % ComEd 233 — 3.35 % — % BGE 156 130 3.40 % 0.37 % PHI (b) — 469 — % 0.35 % Pepco — 175 — % 0.33 % DPL — 149 — % 0.36 % ACE — 145 — % 0.35 % __________ (a) Exelon Corporate had $226 million of outstanding commercial paper borrowings at September 30, 2022 and no outstanding commercial paper borrowings as of December 31, 2021. (b) Represents the consolidated amounts of Pepco, DPL, and ACE.
Schedule of Revolving Credit Agreements	On February 1, 2022, Exelon Corporate and the Utility Registrants each entered into a new 5-year revolving credit facility that replaced its existing syndicated 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 nine months ended September 30, 2022, the following long-term debt was issued: Company (a) Type Interest Rate Maturity Amount Use of Proceeds Exelon SMBC Term Loan Agreement SOFR plus 0.65% July 21, 2023 (b) $300 Fund a cash payment to Constellation and for general corporate purposes. Exelon U.S. Bank Term Loan Agreement SOFR plus 0.65% July 21, 2023 (b) 300 Fund a cash payment to Constellation and for general corporate purposes. Exelon PNC Term Loan Agreement SOFR plus 0.65% July 24, 2023 (b) 250 Fund a cash payment to Constellation and for general corporate purposes. Exelon Notes (c) 2.75% March 15, 2027 650 Repay existing indebtedness and for general corporate purposes. Exelon Notes (c) 3.35% March 15, 2032 650 Repay existing indebtedness and for general corporate purposes. Exelon Notes (c) 4.10% March 15, 2052 700 Repay existing indebtedness and for general corporate purposes. Exelon Long-Term Software License Agreements 2.30% December 1, 2025 17 Procurement of software licenses ComEd First Mortgage Bonds, Series 132 3.15% March 15, 2032 300 Repay outstanding commercial paper obligations and to fund other general corporate purposes. ComEd First Mortgage Bonds, Series 133 3.85% March 15, 2052 450 Repay outstanding commercial paper obligations and to fund other general corporate purposes. PECO First and Refunding Mortgage Bonds 4.60% May 15, 2052 350 Refinance existing indebtedness and for general corporate purposes. PECO First and Refunding Mortgage Bonds 4.375% August 15, 2052 425 Refinance outstanding commercial paper and for general corporate purposes. BGE Notes 4.55% June 1, 2052 500 Repay outstanding commercial paper obligations, repay existing indebtedness, and for general corporate purposes. Pepco First Mortgage Bonds 3.97% March 24, 2052 400 Repay existing indebtedness and for general corporate purposes. Pepco First Mortgage Bonds 3.35% September 15, 2032 225 Repay existing indebtedness and for general corporate purposes. DPL First Mortgage Bonds 3.06% February 15, 2052 125 Repay existing indebtedness and for general corporate purposes. ACE First Mortgage Bonds 2.27% February 15, 2032 25 Repay existing indebtedness and for general corporate purposes. ACE First Mortgage Bonds 3.06% February 15, 2052 150 Repay existing indebtedness and for general corporate purposes. __________ (a) On October 7, 2022, Exelon Corporate entered into an 18-month term loan agreement for $500 million with a variable rate equal to SOFR plus 0.85% and an expiration date of April 7, 2024. (b) During the third quarter of 2022, the SMBC Term Loan, U.S. Bank Term Loan, and PNC Term Loan were all reclassified to Long-term debt due within one year on the Exelon Consolidated Balance Sheet, given that the Term Loans have maturity dates of July 21, 2023, and July 24, 2023, respectively. (c) In connection with the issuance and sale of the Notes, Exelon entered into a Registration Rights Agreement with the representatives of the initial purchasers of the Notes and other parties. Pursuant to the Registration Rights Agreement, Exelon filed a registration statement on August 3, 2022, with respect to an offer to exchange the Notes for substantially similar notes of Exelon that are registered under the Securities Act. The registration statement became effective on August 19, 2022. The registered notes, when issued later in the fourth quarter, will have terms identical in all material respects to the Notes, except that their issuance will have been registered under the Securities Act.

Fair Value of Financial Asset_2

Fair Value of Financial Assets and Liabilities (Tables)	9 Months Ended
Fair Value of Financial Assets and Liabilities (Tables)	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value of Financial Liabilities Recorded at Amortized Cost	Fair Value of Financial Liabilities Recorded at Amortized Cost The following tables present the carrying amounts and fair values of the Registrants’ short-term liabilities, long-term debt, and trust preferred securities (long-term debt to financing trusts or junior subordinated debentures) as of September 30, 2022 and December 31, 2021. The Registrants have no financial liabilities classified as Level 1. The carrying amounts of the Registrants’ short-term liabilities as presented in their Consolidated Balance Sheets are representative of their fair value (Level 2) because of the short-term nature of these instruments. September 30, 2022 December 31, 2021 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 $ 36,583 $ 28,654 $ 2,270 $ 30,924 $ 32,902 $ 34,897 $ 2,217 $ 37,114 ComEd 10,517 8,783 — 8,783 9,773 11,305 — 11,305 PECO 4,612 3,747 50 3,797 4,197 4,740 50 4,790 BGE 4,207 3,539 — 3,539 3,961 4,406 — 4,406 PHI 8,130 4,434 2,220 6,654 7,547 5,970 2,167 8,137 Pepco 3,752 2,179 1,174 3,353 3,445 3,201 975 4,176 DPL 1,938 1,143 446 1,589 1,810 1,426 552 1,978 ACE 1,758 903 600 1,503 1,582 1,091 641 1,732 Long-Term Debt to Financing Trusts Exelon $ 390 $ — $ 385 $ 385 $ 390 $ — $ 470 $ 470 ComEd 205 — 204 204 205 — 248 248 PECO 184 — 181 181 184 — 222 222 __________
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 as of September 30, 2022 and December 31, 2021: Exelon As of September 30, 2022 As of December 31, 2021 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 664 $ — $ — $ 664 $ 524 $ — $ — $ 524 Rabbi trust investments Cash equivalents 62 — — 62 60 — — 60 Mutual funds 49 — — 49 60 — — 60 Fixed income — 8 — 8 — 10 — 10 Life insurance contracts — 57 39 96 — 61 37 98 Rabbi trust investments subtotal 111 65 39 215 120 71 37 228 Mark-to-market derivative assets — — 24 24 — — — — Total assets 775 65 63 903 644 71 37 752 Liabilities Mark-to-market derivative liabilities — — (67) (67) — — (219) (219) Deferred compensation obligation — (68) — (68) — (131) — (131) Total liabilities — (68) (67) (135) — (131) (219) (350) Total net assets (liabilities) $ 775 $ (3) $ (4) $ 768 $ 644 $ (60) $ (182) $ 402 __________ (a) Exelon excludes cash of $384 million and $464 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $225 million and $49 million as of September 30, 2022 and December 31, 2021, respectively, and includes long-term restricted cash of $83 million and $44 million as of September 30, 2022 and December 31, 2021, respectively, which is reported in Other deferred debits in the Consolidated Balance Sheets. ComEd, PECO, and BGE ComEd PECO BGE As of September 30, 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) $ 354 $ — $ — $ 354 $ 10 $ — $ — $ 10 $ 1 $ — $ — $ 1 Rabbi trust investments Mutual funds — — — — 8 — — 8 7 — — 7 Life insurance contracts — — — — — 15 — 15 — — — — Rabbi trust investments subtotal — — — — 8 15 — 23 7 — — 7 Mark-to-market derivative assets (b) — — 24 24 — — — — — — — — Total assets 354 — 24 378 18 15 — 33 8 — — 8 Liabilities Mark-to-market derivative liabilities (b) — — (67) (67) — — — — — — — — Deferred compensation obligation — (7) — (7) — (7) — (7) — (4) — (4) Total liabilities — (7) (67) (74) — (7) — (7) — (4) — (4) Total net assets (liabilities) $ 354 $ (7) $ (43) $ 304 $ 18 $ 8 $ — $ 26 $ 8 $ (4) $ — $ 4 ComEd PECO BGE As of December 31, 2021 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) $ 237 $ — $ — $ 237 $ 9 $ — $ — $ 9 $ — $ — $ — $ — Rabbi trust investments Mutual funds — — — — 11 — — 11 14 — — 14 Life insurance contracts — — — — — 16 — 16 — — — — Rabbi trust investments subtotal — — — — 11 16 — 27 14 — — 14 Total assets 237 — — 237 20 16 — 36 14 — — 14 Liabilities Mark-to-market derivative liabilities (b) — — (219) (219) — — — — — — — — Deferred compensation obligation — (10) — (10) — (9) — (9) — (7) — (7) Total liabilities — (10) (219) (229) — (9) — (9) — (7) — (7) Total net assets (liabilities) $ 237 $ (10) $ (219) $ 8 $ 20 $ 7 $ — $ 27 $ 14 $ (7) $ — $ 7 __________ (a) ComEd excludes cash of $39 million and $105 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $95 million and $42 million as of September 30, 2022 and December 31, 2021, respectively, and includes long-term restricted cash of $83 million and $43 million as of September 30, 2022 and December 31, 2021, respectively, which is reported in Other deferred debits in the Consolidated Balance Sheets. PECO excludes cash of $93 million and $35 million as of September 30, 2022 and December 31, 2021, respectively. BGE excludes cash of $20 million and $51 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $129 million and $4 million as of September 30, 2022 and December 31, 2021, respectively. (b) The Level 3 balance consists of the current asset of $24 million and current and noncurrent liability of none and $67 million, respectively, as of September 30, 2022 and none, $18 million and $201 million, respectively, as of December 31, 2021 related to floating-to-fixed energy swap contracts with unaffiliated suppliers. PHI, Pepco, DPL, and ACE As of September 30, 2022 As of December 31, 2021 PHI Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents (a) $ 266 $ — $ — $ 266 $ 110 $ — $ — $ 110 Rabbi trust investments Cash equivalents 59 — — 59 59 — — 59 Mutual funds 10 — — 10 14 — — 14 Fixed income — 8 — 8 — 10 — 10 Life insurance contracts — 22 38 60 — 27 35 62 Rabbi trust investments subtotal 69 30 38 137 73 37 35 145 Total assets 335 30 38 403 183 37 35 255 Liabilities Deferred compensation obligation — (14) — (14) — (18) — (18) Total liabilities — (14) — (14) — (18) — (18) Total net assets $ 335 $ 16 $ 38 $ 389 $ 183 $ 19 $ 35 $ 237 Pepco DPL ACE As of September 30, 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) $ 76 $ — $ — $ 76 $ 157 $ — $ — $ 157 $ 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 135 22 38 195 157 — — 157 1 — — 1 Liabilities Deferred compensation obligation — (1) — (1) — — — — — — — — Total liabilities — (1) — (1) — — — — — — — — Total net assets $ 135 $ 21 $ 38 $ 194 $ 157 $ — $ — $ 157 $ 1 $ — $ — $ 1 Pepco DPL ACE As of December 31, 2021 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) $ 31 $ — $ — $ 31 $ 43 $ — $ — $ 43 $ — $ — $ — $ — Rabbi trust investments Cash equivalents 58 — — 58 — — — — — — — — Life insurance contracts — 27 35 62 — — — — — — — — Rabbi trust investments subtotal 58 27 35 120 — — — — — — — — Total assets 89 27 35 151 43 — — 43 — — — — Liabilities Deferred compensation obligation — (2) — (2) — — — — — — — — Total liabilities — (2) — (2) — — — — — — — — Total net assets $ 89 $ 25 $ 35 $ 149 $ 43 $ — $ — $ 43 $ — $ — $ — $ — __________ (a) PHI excludes cash of $186 million and $100 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $1 million and $3 million as of September 30, 2022 and December 31, 2021, respectively. Pepco excludes cash of $21 million and $34 million as of September 30, 2022 and December 31, 2021, respectively, and restricted cash of $1 million and $3 million as of September 30, 2022 and December 31, 2021, respectively. DPL excludes cash of $49 million and $28 million as of September 30, 2022 and December 31, 2021, respectively. ACE excludes cash of $111 million and $29 million as of September 30, 2022 and December 31, 2021, respectively.
Fair Value Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis	Reconciliation of Level 3 Assets and Liabilities The following tables present the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis during the three and nine months ended September 30, 2022 and 2021: Exelon ComEd PHI and Pepco Three Months Ended September 30, 2022 Total Mark-to-Market Life Insurance Contracts Balance as of June 30, 2022 $ (50) $ (88) $ 37 Total realized / unrealized gains Included in net income (a) 1 — 1 Included in regulatory assets/liabilities 45 45 (b) — Balance as of September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities as of September 30, 2022 $ 1 $ — $ 1 Exelon ComEd PHI and Pepco Three Months Ended September 30, 2021 Total Mark-to-Market Life Insurance Contracts Balance as of June 30, 2021 $ (231) $ (265) $ 34 Total realized / unrealized gains Included in regulatory assets 51 51 (b) — Balance as of September 30, 2021 $ (180) $ (214) $ 34 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities as of September 30, 2021 $ — $ — $ — Exelon ComEd PHI and Pepco Nine months ended September 30, 2022 Total Mark-to-Market Life Insurance Contracts Balance as of December 31, 2021 $ (182) $ (219) $ 35 Total realized / unrealized gains Included in net income (a) 3 — 3 Included in regulatory assets/liabilities 176 176 (b) — Transfers out of Level 3 (1) — — Balance as of September 30, 2022 $ (4) $ (43) (c) $ 38 The amount of total gains included in income attributed to the change in unrealized gains related to assets and liabilities as of September 30, 2022 $ 3 $ — $ 3 Exelon ComEd PHI and Pepco Nine Months Ended September 30, 2021 Total Mark-to-Market Life Insurance Contracts Balance as of December 31, 2020 $ (267) $ (301) $ 34 Total realized / unrealized gains Included in net income (a) 2 — 2 Included in regulatory assets 87 87 (b) — Purchases, sales, and settlements Settlements (2) — (2) Balance as of September 30, 2021 $ (180) $ (214) $ 34 The amount of total gains included in income attributed to the change in unrealized gain related to assets and liabilities as of September 30, 2021 $ 2 $ — $ 2 __________ (a) Classified in Operating and maintenance expense in the Consolidated Statements of Operations and Comprehensive Income. (b) Includes $51 million of increases in fair value and a decrease for realized gains due to settlements of $6 million recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2022. Includes $49 million of increases in fair value and an increase for realized losses due to settlements of $2 million recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the three months ended September 30, 2021. Includes $179 million of increases in fair value and an decrease for realized losses due to settlements of $3 million recorded in purchase power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2022. Includes $72 million of increases in fair value and an increase for realized losses due to settlements of $15 million recorded in purchased power expense associated with floating-to-fixed energy swap contracts with unaffiliated suppliers for the nine months ended September 30, 2021. (c) The balance consists of $24 million of current assets and current and noncurrent liability of none and $67 million, respectively, as of September 30, 2022.
Fair Value Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis, Valuation Technique	Mark-to-Market 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 as of September 30, 2022 Fair Value as of December 31, 2021 Valuation Unobservable 2022 Range & Arithmetic Average 2021 Range & Arithmetic Average Mark-to-market derivatives $ (43) $ (219) Discounted Forward power price (a) $36.02 - $111.10 $50.61 $28.65 - $47.10 $33.96 ________ (a) An increase to the forward power price would increase the fair value.

Commitments and Contingencies_2

Commitments and Contingencies (Tables)	9 Months Ended
Commitments and Contingencies (Tables)	Sep. 30, 2022
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 as of September 30, 2022: Description Exelon PHI Pepco DPL ACE Total commitments $ 513 $ 320 $ 120 $ 89 $ 111 Remaining commitments (a) 57 50 41 6 3 __________ (a) Remaining commitments extend through 2026 and include rate credits, energy efficiency programs and delivery system modernization.
Commercial Commitments	The Registrants’ commercial commitments as of September 30, 2022, representing commitments potentially triggered by future events were as follows: Expiration within Total 2022 2023 2024 2025 2026 2027 and beyond Exelon Letters of credit $ 17 $ 5 $ 12 $ — $ — $ — $ — Surety bonds (a) 205 85 118 2 — — — Financing trust guarantees 378 — — — — — 378 Guaranteed lease residual values (b) 30 — 1 6 6 5 12 Total commercial commitments $ 630 $ 90 $ 131 $ 8 $ 6 $ 5 $ 390 ComEd Letters of credit $ 10 $ 2 $ 8 $ — $ — $ — $ — Surety bonds (a) 46 5 39 2 — — — Financing trust guarantees 200 — — — — — 200 Total commercial commitments $ 256 $ 7 $ 47 $ 2 $ — $ — $ 200 PECO Letters of credit $ 1 $ — $ 1 $ — $ — $ — $ — Surety bonds (a) 2 — 2 — — — — Financing trust guarantees 178 — — — — — 178 Total commercial commitments $ 181 $ — $ 3 $ — $ — $ — $ 178 BGE Letters of credit $ 3 $ 2 $ 1 $ — $ — $ — $ — Surety bonds (a) 2 1 1 — — — — Total commercial commitments $ 5 $ 3 $ 2 $ — $ — $ — $ — PHI Surety bonds (a) $ 96 $ 75 $ 21 $ — $ — $ — $ — Guaranteed lease residual values (b) 30 — 1 6 6 5 12 Total commercial commitments $ 126 $ 75 $ 22 $ 6 $ 6 $ 5 $ 12 Pepco Surety bonds (a) $ 85 $ 71 $ 14 $ — $ — $ — $ — Guaranteed lease residual values (b) 10 — — 2 2 2 4 Total commercial commitments $ 95 $ 71 $ 14 $ 2 $ 2 $ 2 $ 4 DPL Surety bonds (a) $ 7 $ 3 $ 4 $ — $ — $ — $ — Guaranteed lease residual values (b) 13 — — 3 3 2 5 Total commercial commitments $ 20 $ 3 $ 4 $ 3 $ 3 $ 2 $ 5 ACE Surety bonds (a) $ 4 $ 1 $ 3 $ — $ — $ — $ — Guaranteed lease residual values (b) 7 — 1 1 1 1 3 Total commercial commitments $ 11 $ 1 $ 4 $ 1 $ 1 $ 1 $ 3 __________ (a) Surety bonds — Guarantees issued related to contract and commercial agreements, excluding bid bonds. (b) Represents the maximum potential obligation in the event that the fair value of certain leased equipment and fleet vehicles is zero at the end of the maximum lease term. The lease term associated with these assets ranges from 1 to 8 years. The maximum potential obligation at the end of the minimum lease term would be $73 million guaranteed by Exelon and PHI, of which $24 million, $30 million, and $19 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	As of September 30, 2022 and December 31, 2021, the Registrants had accrued the following undiscounted amounts for environmental liabilities in Accrued expenses, Other current liabilities, and Other deferred credits and other liabilities in their respective Consolidated Balance Sheets: September 30, 2022 December 31, 2021 Total environmental Portion of total related to Total environmental Portion of total related to Exelon $ 405 $ 358 $ 352 $ 303 ComEd 328 328 279 279 PECO 25 24 22 20 BGE 7 6 6 4 PHI 41 — 42 — Pepco 39 — 40 — DPL 1 — 1 — ACE 1 — 1 —

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Tables)	9 Months Ended
Changes in Accumulated Other Comprehensive Income (Tables)	Sep. 30, 2022
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 September 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of June 30, 2022 $ — $ (701) $ — $ (701) Amounts reclassified from AOCI — 9 — 9 Net current-period OCI — 9 — 9 Balance as of September 30, 2022 $ — $ (692) $ — $ (692) Three Months Ended September 30, 2021 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of June 30, 2021 $ (5) $ (3,264) $ (20) $ (3,289) OCI before reclassifications — 14 (3) 11 Amounts reclassified from AOCI — 55 — 55 Net current-period OCI — 69 (3) 66 Balance as of September 30, 2021 $ (5) $ (3,195) $ (23) $ (3,223) Nine Months Ended September 30, 2022 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of 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 — 33 — 33 Net current-period OCI — 35 — 35 Balance as of September 30, 2022 $ — $ (692) $ — $ (692) Nine Months Ended September 30, 2021 Cash Flow Hedges Pension and Non-Pension Postretirement Benefit Plan Items (a) Foreign Total Balance as of December 31, 2020 $ (5) $ (3,372) $ (23) $ (3,400) OCI before reclassifications (1) 15 — 14 Amounts reclassified from AOCI — 163 — 163 Net current-period OCI (1) 178 — 177 Balance as of September 30, 2021 $ (6) $ (3,194) $ (23) $ (3,223) __________
Schedule of Income Taxes Allocated to Other Comprehensive Income (Loss) Components	The following table presents income tax benefit (expense) allocated to each component of Exelon's other comprehensive income (loss): Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Pension and non-pension postretirement benefit plans: Prior service benefit reclassified to periodic benefit cost $ — $ 1 $ — $ 3 Actuarial loss reclassified to periodic benefit cost (3) (19) (11) (57) Pension and non-pension postretirement benefit plans valuation adjustment — (7) — (8)

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	9 Months Ended
Supplemental Financial Information (Tables)	Sep. 30, 2022
Supplemental Financial Information [Abstract]
Taxes Other Than Income Taxes	The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Operations and Comprehensive Income: Taxes other than income taxes Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2022 Utility taxes (a) $ 244 $ 84 $ 51 $ 22 $ 87 $ 79 $ 7 $ 1 Property 99 10 4 50 35 23 11 1 Payroll 28 7 5 4 7 2 1 — Three Months Ended September 30, 2021 Utility taxes (a) $ 215 $ 67 $ 41 $ 21 $ 86 $ 80 $ 6 $ — Property 98 13 5 46 34 23 10 1 Payroll 33 7 4 5 7 2 1 1 Nine Months Ended September 30, 2022 Utility taxes (a) $ 667 $ 233 $ 126 $ 70 $ 238 $ 216 $ 19 $ 3 Property 287 30 12 142 103 70 31 2 Payroll 92 21 14 13 21 5 4 2 Nine Months Ended September 30, 2021 Utility taxes (a) $ 592 $ 188 $ 107 $ 66 $ 231 $ 212 $ 17 $ 2 Property 271 30 13 131 97 65 30 2 Payroll 97 20 12 14 21 5 4 2 _________ (a) The Registrants' utility taxes represent municipal and state utility taxes and gross receipts taxes related to their operating revenues. The offsetting collection of utility taxes from customers is recorded in revenues in the Registrants’ Consolidated Statements of Operations and Comprehensive Income.
Schedule of Other Nonoperating Income, by Component	Other, Net Exelon ComEd PECO BGE PHI Pepco DPL ACE Three Months Ended September 30, 2022 AFUDC — Equity $ 38 $ 10 $ 7 $ 5 $ 16 $ 12 $ 2 $ 2 Non-service net periodic benefit cost 16 — — — — — — — Three Months Ended September 30, 2021 AFUDC — Equity $ 36 $ 10 $ 7 $ 7 $ 12 $ 9 $ 2 $ 1 Non-service net periodic benefit cost 19 — — — — — — — Nine Months Ended September 30, 2022 AFUDC — Equity $ 112 $ 28 $ 22 $ 17 $ 45 $ 35 $ 5 $ 5 Non-service net periodic benefit cost 48 — — — — — — — Nine Months Ended September 30, 2021 AFUDC — Equity $ 99 $ 23 $ 19 $ 21 $ 36 $ 30 $ 4 $ 2 Non-service net periodic benefit cost 64 — — — — — — —
Cash Flow Supplemental Disclosures	The following tables provide additional information about material items recorded in the Registrants' Consolidated Statements of Cash Flows. Depreciation and amortization Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2022 Property, plant, and equipment (b) $ 2,024 $ 770 $ 267 $ 355 $ 502 $ 214 $ 141 $ 126 Amortization of regulatory assets (b) 532 212 10 115 195 98 31 66 Amortization of intangible assets, net (b) 10 — — — — — — — Amortization of energy contract assets and liabilities (c) 3 — — — — — — — Nuclear fuel (d) 66 — — — — — — — ARO accretion (e) 44 — — — — — — — Total depreciation, amortization, and accretion $ 2,679 $ 982 $ 277 $ 470 $ 697 $ 312 $ 172 $ 192 Nine Months Ended September 30, 2021 Property, plant, and equipment (b) $ 4,505 $ 721 $ 249 $ 324 $ 467 $ 204 $ 126 $ 115 Amortization of regulatory assets (b) 439 172 10 110 147 98 31 18 Amortization of intangible assets, net (b) 44 — — — — — — — Amortization of energy contract assets and liabilities (c) 23 — — — — — — — Nuclear fuel (d) 810 — — — — — — — ARO accretion (e) 383 — — — — — — — Total depreciation, amortization, and accretion $ 6,204 $ 893 $ 259 $ 434 $ 614 $ 302 $ 157 $ 133 __________ (a) Exelon's 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 Operating revenues or Purchased power and fuel expense in Exelon’s Consolidated Statements of Operations and Comprehensive Income. (d) Included in Purchased fuel expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. (e) Included in Operating and maintenance expense in Exelon's Consolidated Statement of Operations and Comprehensive Income. Other non-cash operating activities Exelon (a) ComEd PECO BGE PHI Pepco DPL ACE Nine Months Ended September 30, 2022 Pension and non-pension postretirement benefit costs $ 124 $ 45 $ (6) $ 34 $ 39 $ 6 $ 3 $ 9 Allowance for credit losses 130 40 32 18 42 21 9 12 Other decommissioning-related activity 36 — — — — — — — Energy-related options 60 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (92) (163) (1) 40 33 15 3 14 Long-term incentive plan 35 — — — — — — — Amortization of operating ROU asset 47 1 — 14 21 5 6 3 AFUDC — Equity (112) (28) (22) (17) (45) (35) (5) (5) Nine Months Ended September 30, 2021 Pension and non-pension postretirement benefit costs $ 304 $ 97 $ 5 $ 45 $ 36 $ 5 $ 2 $ 8 Allowance for credit losses 155 34 36 7 18 9 3 6 Other decommissioning-related activity (810) — — — — — — — Energy-related options 45 — — — — — — — True-up adjustments to decoupling mechanisms and formula rates (b) (129) (32) (20) 17 (94) (54) (17) (23) Severance costs (67) 1 — — 1 — — — Long-term incentive plan 94 — — — — — — — Amortization of operating ROU asset 146 2 — 22 21 5 7 3 AFUDC — Equity (99) (23) (19) (21) (36) (30) (4) (2) __________ (a) Exelon's 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 2021 Recast 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 September 30, 2022 Cash and cash equivalents $ 446 $ 63 $ 94 $ 20 $ 219 $ 21 $ 49 $ 112 Restricted cash and cash equivalents 744 342 9 130 234 77 157 — Restricted cash included in other long-term assets 83 83 — — — — — — Total cash, restricted cash, and cash equivalents $ 1,273 $ 488 $ 103 $ 150 $ 453 $ 98 $ 206 $ 112 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 long-term 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 September 30, 2021 Cash and cash equivalents $ 2,957 $ 241 $ 344 $ 225 $ 82 $ 19 $ 13 $ 16 Restricted cash and cash equivalents 473 276 8 27 71 41 26 5 Restricted cash included in other long-term assets 54 44 — — 9 — — 9 Total cash, restricted cash, and cash equivalents (a) $ 3,484 $ 561 $ 352 $ 252 $ 162 $ 60 $ 39 $ 30 December 31, 2020 Cash and cash equivalents $ 432 $ 83 $ 19 $ 144 $ 111 $ 30 $ 15 $ 17 Restricted cash and cash equivalents 349 279 7 1 39 35 — 3 Restricted cash included in other long-term assets 53 43 — — 10 — — 10 Cash, restricted cash, and cash equivalents from discontinued operations 332 — — — — — — — Total cash, restricted cash, and cash equivalents $ 1,166 $ 405 $ 26 $ 145 $ 160 $ 65 $ 15 $ 30 __________ (a) Exelon's amounts include amounts related to Generation prior to the separation. See Note 2 — Discontinued Operations for additional information. For additional information on restricted cash see Note 1 — Significant Accounting Policies of the 2021 Recast 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 September 30, 2022 Compensation-related accruals (a) $ 501 $ 152 $ 63 $ 56 $ 89 $ 26 $ 16 $ 13 Taxes accrued 317 115 41 85 90 67 12 4 Interest accrued 341 66 43 44 73 34 21 16 December 31, 2021 Compensation-related accruals (a) $ 596 $ 155 $ 77 $ 78 $ 113 $ 35 $ 20 $ 17 Taxes accrued 253 94 14 53 96 88 9 11 Interest accrued 297 116 41 44 52 28 8 11 __________ (a) Primarily includes accrued payroll, bonuses and other incentives, vacation, and benefits. Book Overdrafts (Exelon, PHI, DPL) Book overdrafts representing outstanding checks in excess of funds on deposit are included in Other current liabilities on the Registrants' Consolidated Balance Sheets. The balance of DPL's book overdrafts was $28 million and $4 million as of September 30, 2022 and December 31, 2021, respectively.

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
Related Party Transactions (Tables)	Sep. 30, 2022
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 affiliates and an immaterial amount recorded as Operating and maintenance expense from affiliates at the Utility Registrants : Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 ComEd (a) $ — $ 94 $ 59 $ 256 PECO (b) — 59 33 142 BGE (c) — 65 18 195 PHI — 99 51 276 Pepco (d) — 69 39 199 DPL (e) — 25 10 63 ACE (f) — 5 2 14 __________ (a) ComEd had an ICC-approved RFP contract with Generation to provide a portion of ComEd’s electric supply requirements. ComEd also purchased RECs and ZECs from Generation. (b) PECO received electric supply from Generation under contracts executed through PECO’s competitive procurement process. In addition, PECO had a ten-year agreement with Generation to sell solar AECs. (c) BGE received a portion of its energy requirements from Generation under its MDPSC-approved market-based SOS and gas commodity programs. (d) Pepco received electric supply from Generation under contracts executed through Pepco's competitive procurement process approved by the MDPSC and DCPSC. (e) DPL received a portion of its energy requirements from Generation under its MDPSC and DEPSC approved market-based SOS commodity programs. (f) ACE received electric supply from Generation under contracts executed through ACE's competitive procurement process approved by the NJBPU.
BSC and PHISCO Service Companies	The following table presents the service company costs allocated to the Registrants: Operating and maintenance from affiliates Capitalized costs Three Months Ended September 30, Nine Months Ended September 30, Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 2022 2021 2022 2021 Exelon BSC $ 156 $ 106 $ 500 $ 355 PHISCO 20 18 60 54 ComEd BSC $ 69 $ 71 $ 234 $ 214 70 47 222 148 PECO BSC 44 41 140 120 24 12 80 57 BGE BSC 46 45 148 133 26 20 86 62 PHI BSC 39 40 135 116 36 27 112 88 PHISCO — — — — 20 18 60 54 Pepco BSC 24 23 80 68 13 11 41 36 PHISCO 28 26 86 84 8 7 24 22 DPL BSC 16 14 51 43 11 10 34 29 PHISCO 24 24 73 73 7 6 20 17 ACE BSC 13 14 42 37 12 7 37 22 PHISCO 20 21 63 64 5 5 16 15
Current Receivables From/Payables To Affiliates	The following tables present current receivables from affiliates and current payables to affiliates: September 30, 2022 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 50 $ — $ 4 $ 54 PECO $ — — — — — 30 — 6 36 BGE — — — — — 31 — 1 32 PHI — — — — — — 4 — 10 14 Pepco — — — — — 14 13 1 28 DPL — — — — — 13 10 1 24 ACE — — — — — 10 9 1 20 Other 3 1 — — — 1 9 — 14 Total $ 3 $ 1 $ — $ — $ — $ 1 $ 161 $ 32 $ 24 $ 222 December 31, 2021 Receivables from affiliates: Payables to affiliates: ComEd PECO BGE Pepco DPL ACE Generation BSC PHISCO Other Total ComEd $ — $ — $ — $ — $ — $ 41 $ 71 $ — $ 9 $ 121 PECO $ — — — — — 30 36 — 4 70 BGE — — — — — 4 41 — 3 48 PHI — 1 — — — 1 — 5 — 9 16 Pepco — — 1 1 1 20 21 12 3 59 DPL — — — — — 4 17 11 1 33 ACE — — — — — 7 13 9 2 31 Generation 13 — — — — — 102 — 16 131 Other 3 — — — — — 11 — — 14 Total $ 16 $ 1 $ 1 $ — $ 1 $ 2 $ 117 $ 306 $ 32 $ 47 $ 523
Long Term Debt to Financing Trusts	The following table presents Long-term debt to financing trusts: September 30, 2022 December 31, 2021 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_3

Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings/Undistributed earnings (losses)	$ 4,502						$ 4,502		$ 16,942
Deferred income taxes and unamortized investment tax credits	11,113						11,113		10,611
Net income (loss)	676	$ 465	$ 598	$ 1,229	$ 476	$ (264)	1,739	$ 1,441
Atlantic City Electric Company [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings/Undistributed earnings (losses)	(12)						(12)		(15)
Deferred income taxes and unamortized investment tax credits	733						733		682
Net income (loss)	94	11	26	90	37	14	131	141
Pepco Holdings LLC [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings/Undistributed earnings (losses)	(316)						(316)		(210)
Deferred income taxes and unamortized investment tax credits	2,864						2,864		$ 2,675
Net income (loss)	$ 289	$ 100	$ 130	$ 266	$ 141	$ 128	$ 518	$ 535

Discontinued Operations and Dis

Discontinued Operations and Disposal Groups (Details) - USD ($) $ in Millions	3 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2022	Feb. 01, 2022	Jan. 31, 2022
Discontinued Operations - Income Statement
Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Expense	$ 68	$ 193
Exelon Generation Co L L C [Member]
Discontinued Operations - Income Statement
Net assets				$ (11,573)
Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Expense	12	32
Corporate, Non-Segment [Member]
Discontinued Operations - Income Statement
Common Stock, Shares, Issued				326,663,937
Separation Cash Payment					$ 1,750
Proceeds from Sale and Collection of Notes Receivable			$ 258
Corporate, Non-Segment [Member] \| ShortTermDebtSOFRplus0.75Jan2023
Discontinued Operations - Income Statement
Short-term Bank Loans and Notes Payable	1,150	1,150	1,150
Corporate, Non-Segment [Member] \| SMBCTermLoanJuly2023 \| Notes Payable to Banks [Member]
Discontinued Operations - Income Statement
Debt Instrument, Face Amount	300	300	300
Corporate, Non-Segment [Member] \| USBTermLoanJuly2023 \| Notes Payable to Banks [Member]
Discontinued Operations - Income Statement
Debt Instrument, Face Amount	300	300	300
Corporate, Non-Segment [Member] \| PNCTermLoanJuly2023 \| Notes Payable to Banks [Member]
Discontinued Operations - Income Statement
Debt Instrument, Face Amount	$ 250	$ 250	$ 250

Discontinued Operations and D_2

Discontinued Operations and Disposal Groups (Details) - Income Statement - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Discontinued Operations - Income Statement
Operating and maintenance	$ 1,148	$ 1,187	$ 3,436	$ 3,340
Cost, Depreciation and Amortization	825	758	2,472	2,253
Taxes, Miscellaneous	377	353	1,061	983
Costs and Expenses	3,834	4,107	11,804	11,357
Other, net	122	60	435	190
Nonoperating Income (Expense)	(243)	(264)	(628)	(777)
Income taxes	92	35	356	76
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	772	117	134
Net income (loss) attributable to noncontrolling interests	0	26	1	126
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic	$ 0	746	116	8
Total transaction and transition costs incurred related to the Separation		13	52	19
Total transaction costs relating to the Separation			19
Exelon Generation Co L L C [Member]
Discontinued Operations - Income Statement
Revenue from Contract with Customer, Including Assessed Tax		4,083	1,855	13,250
Revenue from Related Parties		325	161	873
Disposal Group, Including Discontinued Operation, Revenue		4,408	2,016	14,123
Purchased power and/or fuel		1,545	1,138	8,102
Operating and maintenance		845	371	3,132
Cost, Depreciation and Amortization		866	94	2,735
Taxes, Miscellaneous		115	44	354
Costs and Expenses		3,371	1,647	14,323
Gain (Loss) on Disposition of Assets		65	10	144
Disposal Group, Including Discontinued Operation, Operating Income (Loss)		1,102	379	(56)
Disposal Group, Including Discontinued Operation, Interest Expense		(73)	(20)	(214)
Other, net		(115)	(281)	561
Nonoperating Income (Expense)		(188)	(301)	347
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		914	78	291
Income taxes		139	(40)	152
Income (Loss) from Equity Method Investments		(3)	(1)	(5)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		772	117	134
Net income (loss) attributable to noncontrolling interests		26	1	126
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic		$ 746	$ 116	$ 8

Discontinued Operations and D_3

Discontinued Operations and Disposal Groups (Details) - Balance Sheet - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Discontinued Operations - Income Statement
Restricted cash	$ 744	$ 321	$ 473	$ 349
Customer accounts receivable	2,129	2,189
Accounts Receivable, Allowance for Credit Loss, Current	(341)	(320)
Other accounts receivable	1,726	1,068
Allowance for Credit Loss, Receivable, Other, Current	(84)	(72)
Other Receivables, Net, Current	1,642	996
Fossil fuel and emission allowances	235	105
Materials and supplies inventory, net	522	476
Current assets of discontinued operations	0	7,835
Accumulated depreciation and amortization	15,517	14,430
Investments	230	250
Other Assets, Noncurrent	1,086	885
Property, plant, and equipment, deferred debits, and other assets of discontinued operations	0	38,509
Assets	93,455	133,013
Short-term Debt	1,690	1,248
Long-term Debt and Lease Obligation, Current	1,300	2,153
Mark-to-market derivative liabilities (current liabilities)	0	18
Current liabilities of discontinued operations	0	7,940
Long-term Debt, Excluding Current Maturities	35,283	30,749
Deferred income taxes and unamortized investment tax credits	11,113	10,611
Asset retirement obligations, noncurrent	266	271
Derivative Liability, Noncurrent	67	201
Other	1,994	1,573
Long-term debt, deferred credits, and other liabilities of discontinued operations	0	25,676
Total Liabilities	$ 68,873	98,218
Exelon Generation Co L L C [Member]
Discontinued Operations - Income Statement
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents		510
Restricted cash		72
Customer accounts receivable		1,724
Accounts Receivable, Allowance for Credit Loss, Current		(55)
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		1,669
Other accounts receivable		596
Allowance for Credit Loss, Receivable, Other, Current		(4)
Other Receivables, Net, Current		592
Mark-to-market derivative assets, current		2,169
Fossil fuel and emission allowances		284
Materials and supplies inventory, net		1,004
Renewable energy credits, current		529
Disposal Group, Including Discontinued Operations, Assets, Current - Assets held for sale		13
Disposal Group, Including Discontinued Operation, Other Assets, Current		993
Current assets of discontinued operations		7,835
Accumulated depreciation and amortization		15,888
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent		19,661
Nuclear decommissioning trust funds		15,938
Investments		193
Derivative Asset, Noncurrent		949
Other Assets, Noncurrent		1,768
Property, plant, and equipment, deferred debits, and other assets of discontinued operations		38,509
Assets		46,344
Short-term Debt		2,082
Long-term Debt and Lease Obligation, Current		1,220
Disposal Group, Including Discontinued Operation, Accounts Payable, Current		1,757
Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current		818
Mark-to-market derivative liabilities (current liabilities)		981
Energy Marketing Accounts Payable		779
Disposal Group, Including Discontinued Operations, Assets, Current - Liabilities held for sale		3
Disposal Group, Including Discontinued Operation, Other Liabilities, Current		300
Current liabilities of discontinued operations		7,940
Long-term Debt, Excluding Current Maturities		4,575
Deferred income taxes and unamortized investment tax credits		3,583
Asset retirement obligations, noncurrent		12,819
Disposal Group, Including Discontinued Operation, Pension Plan Benefit Obligation, Noncurrent		939
Disposal Group, Including Discontinued Operation, Postretirement Plan Benefit Obligation, Noncurrent		876
Spent Nuclear Fuel Obligation, Noncurrent		1,210
Derivative Liability, Noncurrent		513
Other		1,161
Long-term debt, deferred credits, and other liabilities of discontinued operations		25,676
Total Liabilities		$ 33,616

Discontinued Operations and D_4

Discontinued Operations and Disposal Groups (Details) - Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Discontinued Operations - Income Statement
Depreciation, Amortization and Accretion, Net	$ 2,679	$ 6,204
Asset Impairment Charges	46
Gain (Loss) on Sale of Assets and Asset Impairment Charges	(8)	(147)
Deferred income taxes and amortization of investment tax credits	256	(45)
Net fair value changes related to derivatives	(59)	(1,244)
Net realized and unrealized (gains) losses on NDT funds	205	(383)
Net unrealized (gains) losses on equity investments	16	83
Other non-cash operating activities	(265)	293
Payments to Acquire Property, Plant, and Equipment	(5,179)	(5,970)
Collection of deferred purchase price	169	3,052
Decrease in capital expenditures not paid	(147)	(334)
Increase in deferred purchase price	348	2,933
Increase in PPE related to ARO update	331	574
Exelon Generation Co L L C [Member]
Discontinued Operations - Income Statement
Depreciation, Amortization and Accretion, Net	207	3,951
Asset Impairment Charges	0	537
Gain (Loss) on Sale of Assets and Asset Impairment Charges	9	(144)
Deferred income taxes and amortization of investment tax credits	(143)	(242)
Net fair value changes related to derivatives	(59)	(1,244)
Net realized and unrealized (gains) losses on NDT funds	205	(383)
Net unrealized (gains) losses on equity investments	16	83
Other non-cash operating activities	36	(810)
Payments to Acquire Property, Plant, and Equipment	(227)	(1,098)
Collection of deferred purchase price	169	3,052
Decrease in capital expenditures not paid	(128)	(77)
Increase in deferred purchase price	348	2,933
Increase in PPE related to ARO update	$ 335	$ 550

Regulatory Matters - Schedule o

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

12 Months Ended

Oct. 27, 2022

Oct. 12, 2022

Aug. 15, 2022

May 25, 2022

Mar. 31, 2022

Mar. 02, 2022

Feb. 23, 2022

Dec. 23, 2021

Dec. 22, 2021

Dec. 01, 2021

Nov. 18, 2021

Jul. 14, 2021

Jun. 28, 2021

Jun. 08, 2021

Apr. 16, 2021

Mar. 31, 2021

Mar. 30, 2021

Feb. 26, 2021

Dec. 16, 2020

Sep. 11, 2020

Jun. 01, 2020

Dec. 31, 2021

Commonwealth Edison Co [Member] | Illinois 2021 Electric Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

Requested Revenue Requirement Increase (Decrease)

$ 51

Approved Revenue Requirement Increase (Decrease)

$ 46

Approved Return on Equity, Percentage

7.36%

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

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 37

Approved Return on Equity, Percentage

7.36%

Public Utilities, Approved Equity Capital Structure, Percentage

5.72%

Basis points for ComEd's Revenue Requirement

580

Commonwealth Edison Co [Member] | Illinois 2021 Electric Distribution Base Rate Case 2020 Reconciliation | 2020

Regulatory Matters Completed Rate Cases [Line Items]

Approved Return on Equity, Percentage

7.29%

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

$ 9

Public Utilities, Approved Equity Capital Structure, Percentage

5.69%

Basis points for ComEd's Revenue Requirement

580

Commonwealth Edison Co [Member] | Illinois 2021 Electric Distribution Base Rate Case 2020 Reconciliation | Performance Metrics Penalty | 2020

Regulatory Matters Completed Rate Cases [Line Items]

Basis points for ComEd's Revenue Requirement

Commonwealth Edison Co [Member] | ComEd 2022 Energy Efficiency Formula Rate [Domain]

Regulatory Matters Completed Rate Cases [Line Items]

Requested Revenue Requirement Increase (Decrease)

$ 50

Approved Revenue Requirement Increase (Decrease)

$ 50

Approved Return on Equity, Percentage

7.85%

Basis points for ComEd's Revenue Requirement

580

Commonwealth Edison Co [Member] | ComEd 2022 Energy Efficiency Formula Rate [Domain] | 2021

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ (16)

Approved Return on Equity, Percentage

6.99%

Public Utilities, Approved Equity Capital Structure, Percentage

5.52%

Commonwealth Edison Co [Member] | ComEd 2022 Energy Efficiency Formula Rate [Domain] | 2023

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

PECO Energy Co [Member] | Pennsylvania 2021 Electric Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

Requested Revenue Requirement Increase (Decrease)

$ 246

Approved Revenue Requirement Increase (Decrease)

$ 132

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%

Potomac Electric Power Company [Member] | District of Columbia 2019 Electric Distribution Base Rate Case [Member]

Regulatory Matters Completed Rate Cases [Line Items]

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

$ 136

Approved Revenue Requirement Increase (Decrease)

$ 109

Approved Return on Equity, Percentage

9.275%

Potomac Electric Power Company [Member] | District of Columbia 2019 Electric Distribution Base Rate Case [Member] | 2021

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 42

Potomac Electric Power Company [Member] | District of Columbia 2019 Electric Distribution Base Rate Case [Member] | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

Potomac Electric Power Company [Member] | District of Columbia 2019 Electric Distribution Base Rate Case [Member] | Offsets | 2021

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

(22)

Potomac Electric Power Company [Member] | District of Columbia 2019 Electric Distribution Base Rate Case [Member] | Offsets | 2022

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ (40)

Delmarva Power and Light Company [Member] | Maryland 2021 Electric Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

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

$ 27

Approved Revenue Requirement Increase (Decrease)

$ 13

Approved Return on Equity, Percentage

9.60%

Delmarva Power and Light Company [Member] | Delaware 2022 Natural Gas Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

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

$ 13

Approved Revenue Requirement Increase (Decrease)

$ 8

Approved Return on Equity, Percentage

9.60%

Atlantic City Electric Company [Member] | New Jersey 2020 Electric Distribution Base Rate Case

Regulatory Matters Completed Rate Cases [Line Items]

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

$ 67

Approved Revenue Requirement Increase (Decrease)

$ 41

Approved Return on Equity, Percentage

9.60%

Atlantic City Electric Company [Member] | New Jersey 2020 Electric Distribution Base Rate Case | Tax Benefits

Regulatory Matters Completed Rate Cases [Line Items]

Approved Revenue Requirement Increase (Decrease)

$ 11

Regulatory Matters - Schedule_2

Regulatory Matters - Schedule of Pending Rate Cases (Details) - USD ($) $ in Millions	Oct. 07, 2022	May 19, 2022	Apr. 15, 2022
Commonwealth Edison Co [Member] \| Illinois 2022 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)			$ 199
Commonwealth Edison Co [Member] \| Illinois 2022 Electric Distribution Base Rate Case \| 2023
Regulatory Matters Pending Rate Cases [Line Items]
Requested Return on Equity, Percentage			7.85%
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount			$ 144
Requested Return on Distribution Rate Base, Percentage			5.94%
Basis points for ComEd's Revenue Requirement			580
Commonwealth Edison Co [Member] \| Illinois 2022 Electric Distribution Base Rate Case \| 2021
Regulatory Matters Pending Rate Cases [Line Items]
Requested Return on Equity, Percentage			7.78%
Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation			$ 55
Requested Return on Distribution Rate Base, Percentage			5.91%
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 Pending Rate Cases [Line Items]
Basis points for ComEd's Revenue Requirement			7
Delmarva Power and Light Company [Member] \| Maryland 2022 Electric Distribution Base Rate Case
Regulatory Matters Pending Rate Cases [Line Items]
Requested Revenue Requirement Increase (Decrease)	$ 29	$ 38
Requested Return on Equity, Percentage	9.60%	10.25%
Delmarva Power and Light Company [Member] \| Maryland 2022 Electric Distribution Base Rate Case \| 2023
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount	$ 17	$ 23
Public Utilities, Requested Rate Increase (Decrease), Tax Benefits		(12)
Delmarva Power and Light Company [Member] \| Maryland 2022 Electric Distribution Base Rate Case \| 2024
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount	6	8
Public Utilities, Requested Rate Increase (Decrease), Tax Benefits		(8)
Delmarva Power and Light Company [Member] \| Maryland 2022 Electric Distribution Base Rate Case \| 2025
Regulatory Matters Pending Rate Cases [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Initial Revenue Requirement, Amount	$ 6	$ 7

Regulatory Matters - Annual Ele

Regulatory Matters - Annual Electric Transmission Fillings (Details) - USD ($) $ in Millions	May 27, 2022	May 13, 2022	Apr. 29, 2022	Apr. 27, 2022
Commonwealth Edison Co [Member] \| 2022 Transmission Formula Rate Annual Update [Domain]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 24
Annual Reconciliation Increase			(24)
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount			$ 0
Public Utilities, Approved Equity Capital Structure, Percentage			8.11%
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] \| 2022 Transmission Formula Rate Annual Update [Domain]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 23
Annual Reconciliation Increase	16
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount	$ 39
Public Utilities, Approved Equity Capital Structure, Percentage	7.30%
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] \| 2022 Transmission Formula Rate Annual Update [Domain]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 25
Annual Reconciliation Increase				(4)
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount				$ 16
Public Utilities, Approved Equity Capital Structure, Percentage				7.30%
Public Utilities, Approved Return on Equity, Percentage				10.50%
Baltimore Gas and Electric Company [Member] \| 2022 Transmission Formula Rate Revenue Reduction
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount				$ 5
Potomac Electric Power Company [Member] \| 2022 Transmission Formula Rate Annual Update [Domain]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 16
Annual Reconciliation Increase		15
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 31
Public Utilities, Approved Equity Capital Structure, Percentage		7.60%
Public Utilities, Approved Return on Equity, Percentage		10.50%
Delmarva Power and Light Company [Member] \| 2022 Transmission Formula Rate Annual Update [Domain]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 9
Annual Reconciliation Increase		2
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 11
Public Utilities, Approved Equity Capital Structure, Percentage		7.09%
Public Utilities, Approved Return on Equity, Percentage		10.50%
Atlantic City Electric Company [Member] \| 2022 Transmission Formula Rate Annual Update [Domain]
Public Utilities, General Disclosures [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 21
Annual Reconciliation Increase		13
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 34
Public Utilities, Approved Equity Capital Structure, Percentage		7.18%
Public Utilities, Approved Return on Equity, Percentage		10.50%

Regulatory Matters - Energy Eff

Regulatory Matters - Energy Efficiency Formula Rate (Details) - ComEd 2022 Energy Efficiency Formula Rate [Domain] - Commonwealth Edison Co [Member] - USD ($) $ in Millions			12 Months Ended
	Oct. 27, 2022	May 25, 2022	Dec. 31, 2021
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 50
Approved Revenue Requirement Increase (Decrease)	$ 50
Public Utilities, Requested Equity Capital Structure, Percentage	5.94%
Basis points for ComEd's Revenue Requirement	580
Public Utilities, Approved Return on Equity, Percentage	7.85%
2021
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Approved Revenue Requirement Increase (Decrease)	$ (16)
Public Utilities, Approved Equity Capital Structure, Percentage			5.52%
Public Utilities, Approved Return on Equity, Percentage			6.99%

Regulatory Matters - Capitalize

Regulatory Matters - Capitalized Ratemaking Amount Not Recognized (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Public Utility, Property, Plant and Equipment [Line Items]
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes	$ 49	$ 43
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	5	1
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	30	37
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	14	5
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	11	3
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	$ 0

Regulatory Matters - Narrative

Regulatory Matters - Narrative (Details) - USD ($) $ in Millions		9 Months Ended	36 Months Ended
	Jan. 01, 2023	Sep. 30, 2022	Dec. 31, 2025	Mar. 31, 2022
Commonwealth Edison Co [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		$ 668
Beneficial electrification planned expenditure			$ 300
Maximum increase of revenue requirement	5%
Commonwealth Edison Co [Member] \| Carbon Mitigation Credit rider
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		534
Regulatory Assets		534
Commonwealth Edison Co [Member] \| Electric Distribution Formula Rate Annual Reconciliations
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		161
Commonwealth Edison Co [Member] \| Renewable Energy Program [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(152)
PECO Energy Co [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(301)
Increase (Decrease) in Regulatory Liabilities		(436)
PECO Energy Co [Member] \| Nuclear Decommissioning [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(409)
PECO Energy Co [Member] \| Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(19)
PECO Energy Co [Member] \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(300)
Baltimore Gas and Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(70)
Baltimore Gas and Electric Company [Member] \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(100)
Potomac Electric Power Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(68)
Increase (Decrease) in Regulatory Liabilities		(92)
Potomac Electric Power Company [Member] \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(99)
Potomac Electric Power Company [Member] \| Energy Efficiency and Demand Response Programs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(13)
Potomac Electric Power Company [Member] \| DC PLUG Charge
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(25)
Potomac Electric Power Company [Member] \| Under-recovered revenue decoupling
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(16)
Delmarva Power and Light Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(35)
Delmarva Power and Light Company [Member] \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(41)
Atlantic City Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability		158		$ 203
Increase (Decrease) in Regulatory Assets		159
Increase (Decrease) in Regulatory Liabilities		(44)
Gain (Loss) on Contract Termination		45
Atlantic City Electric Company [Member] \| Other Current Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability		87
Atlantic City Electric Company [Member] \| Other Noncurrent Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability		71
Atlantic City Electric Company [Member] \| Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		(49)
Atlantic City Electric Company [Member] \| Electric Energy Costs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		140
Atlantic City Electric Company [Member] \| Over-recovered revenue decoupling
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities		$ 12

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Change in Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	$ 103	$ 105	$ 107	$ 111	$ 113	$ 116	$ 109	$ 118
Revenues recognized, contract liabilities	(2)	(2)	(2)	(2)	(3)	(2)
Pepco Holdings LLC [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	103	105	107	111	113	116	109	118
Revenues recognized, contract liabilities	(2)	(2)	(2)	(2)	(3)	(2)
Potomac Electric Power Company [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	83	84	85	89	91	92	87	94
Revenues recognized, contract liabilities	(1)	(1)	(2)	(2)	(1)	(2)
Delmarva Power and Light Company [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	10	11	11	11	11	12	11	12
Revenues recognized, contract liabilities	(1)	0	0	0	(1)	0
Atlantic City Electric Company [Member]
Contract Liabilities [Roll Forward]
Contract with Customer, Liability, Current	10	10	11	11	11	12	$ 11	$ 12
Revenues recognized, contract liabilities	$ 0	$ (1)	$ 0	$ 0	$ (1)	$ 0

Revenue from Contract with Cust

Revenue from Contract with Customer - Performance Obligations (Details) $ in Millions	Sep. 30, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 103
Pepco Holdings LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	103
Potomac Electric Power Company [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	83
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]: 2022-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 \| Pepco Holdings LLC [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 \| Potomac Electric Power Company [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 \| 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	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 \| 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	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
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
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 \| Pepco Holdings LLC [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
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 \| Potomac Electric Power Company [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]: 2023-01-01 \| 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	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 \| 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]: 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	$ 82
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	$ 82
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	$ 65
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	$ 9
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	$ 8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
Segment Information - Narrative (Details)	Sep. 30, 2022 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						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 4,845			$ 4,863			$ 14,412	$ 13,514
Income (Loss) before income taxes	768			492			1,978	1,383
Income taxes	92			35			356	76
Net income (loss)	676	$ 465	$ 598	1,229	$ 476	$ (264)	1,739	1,441
Capital expenditures							5,179	5,970
Assets	93,455						93,455		$ 133,013
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	676			457			1,622	1,307
Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues	1,598			1,470			4,223	3,854
Revenue from Related Parties	3			3			9	10
Income (Loss) before income taxes	291			264			528	538
Income taxes	2			(2)			10	3
Net income (loss)	289	$ 100	$ 130	266	$ 141	$ 128	518	535
Capital expenditures							1,174	1,299
Assets	25,655						25,655		24,744
Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	4,845			4,863			14,412	13,514
Revenue from Related Parties	0			36			6	48
Depreciation and Amortization	825			758			2,472	2,253
Operating Expenses	3,834			4,107			11,804	11,357
Interest expense, net	365			324			1,063	967
Income (Loss) before income taxes	768			492			1,978	1,383
Income taxes	92			35			356	76
Capital expenditures	1,672			1,563			4,952	4,872
Assets	93,455						93,455		86,669
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	676			457			1,622	1,307
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(396)			(518)			(1,376)	(1,554)
Revenue from Related Parties	(393)			(516)			(1,377)	(1,549)
Depreciation and Amortization	0			0			0	1
Operating Expenses	(380)			(353)			(1,288)	(1,067)
Interest expense, net	0			0			0	(1)
Income (Loss) before income taxes	0			(154)			(42)	(447)
Income taxes	0			(6)			(9)	(26)
Capital expenditures	0			0			0	0
Assets	(4,103)						(4,103)		(8,319)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(1)			(149)			(33)	(422)
Intersegment Eliminations [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues	(94)			(93)			(290)	(283)
Revenue from Related Parties	(94)			(93)			(290)	(283)
Depreciation and Amortization	0			0			0	0
Operating Expenses	(95)			(93)			(290)	(283)
Interest expense, net	1			0			1	0
Income (Loss) before income taxes	0			0			0	0
Income taxes	0			0			0	0
Net income (loss)	0			0			0	0
Capital expenditures	0			0			0	0
Assets	(86)						(86)		(60)
Commonwealth Edison Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,378			1,789			4,536	4,840
Depreciation and Amortization	333			304			982	893
Operating Expenses	913			1,428			3,357	3,833
Interest expense, net	104			98			308	292
Income (Loss) before income taxes	375			276			909	750
Income taxes	84			56			203	141
Capital expenditures	593			561			1,801	1,723
Assets	38,582						38,582		36,470
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	291			220			706	609
Commonwealth Edison Co [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	6			9			14	19
PECO Energy Co [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,014			818			2,877	2,399
Depreciation and Amortization	92			86			277	259
Operating Expenses	798			677			2,230	1,908
Interest expense, net	45			40			129	119
Income (Loss) before income taxes	179			108			541	392
Income taxes	44			(3)			67	9
Capital expenditures	333			301			991	878
Assets	14,048						14,048		13,824
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	135			111			474	383
PECO Energy Co [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	3			2			5	6
Baltimore Gas and Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	870			770			2,810	2,426
Depreciation and Amortization	148			142			470	434
Operating Expenses	810			709			2,446	2,080
Interest expense, net	39			36			110	103
Income (Loss) before income taxes	26			32			270	266
Income taxes	(7)			(4)			3	(24)
Capital expenditures	340			287			918	907
Assets	12,932						12,932		12,324
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	33			36			267	290
Baltimore Gas and Electric Company [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	3			7			13	20
Pepco Holdings LLC [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,598			1,470			4,223	3,854
Depreciation and Amortization	238			210			697	614
Operating Expenses	1,254			1,155			3,535	3,167
Interest expense, net	72			67			216	201
Income (Loss) before income taxes	291			264			528	538
Income taxes	2			(2)			10	3
Net income (loss)	289			266			518	535
Capital expenditures	398			410			1,174	1,299
Assets	25,655						25,655		24,744
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	289			266			518	535
Pepco Holdings LLC [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	3			3			9	10
Potomac Electric Power Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	724			660			1,919	1,736
Depreciation and Amortization	99			104			312	302
Operating Expenses	555			501			1,588	1,396
Interest expense, net	37			35			111	104
Income (Loss) before income taxes	146			136			259	273
Income taxes	1			6			(2)	9
Net income (loss)	145			130			261	264
Capital expenditures	193			202			595	641
Assets	10,349						10,349		9,903
Potomac Electric Power Company [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	2			2			4	4
Delmarva Power and Light Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	412			360			1,176	1,040
Depreciation and Amortization	59			53			172	157
Operating Expenses	345			295			999	858
Interest expense, net	16			15			48	47
Income (Loss) before income taxes	54			53			138	144
Income taxes	2			3			8	9
Net income (loss)	52			50			130	135
Capital expenditures	100			109			294	320
Assets	5,710						5,710		5,412
Delmarva Power and Light Company [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	1			2			5	6
Atlantic City Electric Company [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenues	462			451			1,120	1,080
Depreciation and Amortization	74			46			192	133
Operating Expenses	353			359			947	911
Interest expense, net	17			14			49	43
Income (Loss) before income taxes	95			79			133	129
Income taxes	1			(11)			2	(12)
Net income (loss)	94			90			131	141
Capital expenditures	105			97			284	336
Assets	4,966						4,966		4,556
Atlantic City Electric Company [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	0			1			2	2
Corporate and Other [Member] \| Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenues	381			534			1,342	1,549
Depreciation and Amortization	14			16			46	52
Operating Expenses	439			491			1,524	1,436
Interest expense, net	105			83			300	253
Income (Loss) before income taxes	(103)			(34)			(228)	(116)
Income taxes	(31)			(6)			82	(27)
Capital expenditures	8			4			68	65
Assets	6,341						6,341		7,626
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(71)			(27)			(310)	(88)
Corporate and Other [Member] \| Corporate, Non-Segment [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenues	94			92			298	281
Depreciation and Amortization	6			7			21	22
Operating Expenses	96			93			291	285
Interest expense, net	1			3			7	7
Income (Loss) before income taxes	(4)			(4)			(2)	(8)
Income taxes	(2)			0			2	(3)
Net income (loss)	(2)			(4)			(4)	(5)
Capital expenditures	0			2			1	2
Assets	4,716						4,716		$ 4,933
Corporate and Other [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	378			531			1,342	1,542
Corporate and Other [Member] \| Intersegment Eliminations [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Related Parties	94			91			288	281
Rate-regulated electric revenues [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,557			4,736			12,972	12,344
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,568			1,438			4,090	3,632
Rate-regulated electric revenues [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,621			4,692			13,082	12,470
Rate-regulated electric revenues [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	(12)			20			(24)	5
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	(3)			(4)			0	(12)
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	1,378			1,789			4,536	4,840
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	941			762			2,390	2,033
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	757			677			2,122	1,866
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	1,557			1,444			4,058	3,726
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	724			660			1,919	1,736
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	374			337			1,019	922
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	462			451			1,120	1,080
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	224			174			1,348	1,041
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	38			23			157	118
Rate-regulated natural gas revenues [Member] \| Operating Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	224			171			1,330	1,044
Rate-regulated natural gas revenues [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	0			(1)			(2)	0
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	73			56			487	366
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	113			93			688	560
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	38			23			157	118
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	38			23			157	118
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	(384)			(537)			(1,350)	(1,559)
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	(91)			(89)			(290)	(271)
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	3			3			8	10
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	381			534			1,342	1,549
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	$ 94			$ 92			$ 298	$ 281

Segment Information - Electric

Segment Information - Electric and Gas Revenue by Customer Class (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue, Major Customer [Line Items]
Revenues	$ 4,845	$ 4,863	$ 14,412	$ 13,514
Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenues	4,845	4,863	14,412	13,514
Revenue from Related Parties	0	36	6	48
Commonwealth Edison Co [Member]
Revenue, Major Customer [Line Items]
Revenues	1,378	1,789	4,536	4,840
Revenue from Related Parties	6	9	14	19
Commonwealth Edison Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	1,284	1,815	4,351	4,784
Commonwealth Edison Co [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	94	(26)	185	56
PECO Energy Co [Member]
Revenue, Major Customer [Line Items]
Revenues	1,014	818	2,877	2,399
Revenue from Related Parties	3	2	5	6
PECO Energy Co [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	1,014	813	2,864	2,377
PECO Energy Co [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	0	5	13	22
Baltimore Gas and Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenues	870	770	2,810	2,426
Revenue from Related Parties	3	7	13	20
Baltimore Gas and Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	873	790	2,835	2,434
Baltimore Gas and Electric Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	(3)	(20)	(25)	(8)
Pepco Holdings LLC [Member]
Revenue, Major Customer [Line Items]
Revenues	1,598	1,470	4,223	3,854
Revenue from Related Parties	3	3	9	10
Pepco Holdings LLC [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	1,608	1,462	4,252	3,757
Pepco Holdings LLC [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	(10)	8	(29)	97
Potomac Electric Power Company [Member]
Revenue, Major Customer [Line Items]
Revenues	724	660	1,919	1,736
Revenue from Related Parties	2	2	4	4
Potomac Electric Power Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	731	650	1,931	1,680
Potomac Electric Power Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	(7)	10	(12)	56
Delmarva Power and Light Company [Member]
Revenue, Major Customer [Line Items]
Revenues	412	360	1,176	1,040
Revenue from Related Parties	1	2	5	6
Delmarva Power and Light Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	412	361	1,178	1,022
Delmarva Power and Light Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	0	(1)	(2)	18
Atlantic City Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenues	462	451	1,120	1,080
Revenue from Related Parties	0	1	2	2
Atlantic City Electric Company [Member] \| Regulated Operation [Member]
Revenue, Major Customer [Line Items]
Revenues	465	451	1,134	1,057
Atlantic City Electric Company [Member] \| Other Regulated Revenue [Member]
Revenue, Major Customer [Line Items]
Revenues	(3)	0	(14)	23
Rate-regulated electric revenues [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,557	4,736	12,972	12,344
Rate-regulated electric revenues [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	4,621	4,692	13,082	12,470
Rate-regulated electric revenues [Member] \| Commonwealth Edison Co [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,284	1,812	4,359	4,789
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	1,284	1,815	4,351	4,784
Revenue from Related Parties	6	9	14	19
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	6	6	22	24
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	935	978	2,610	2,479
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	217	433	953	1,176
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	(117)	148	48	420
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	3	11	22	33
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	246	245	718	676
Rate-regulated electric revenues [Member] \| PECO Energy Co [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	943	757	2,384	2,008
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	941	757	2,378	2,011
Revenue from Related Parties	3	2	5	5
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	2	11	2
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	620	509	1,538	1,325
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	149	113	386	312
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	93	67	229	183
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	23	24
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	61	202	167
Rate-regulated electric revenues [Member] \| Baltimore Gas and Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	761	694	2,138	1,874
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	760	695	2,132	1,877
Revenue from Related Parties	2	4	5	10
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	3	11	7
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	406	383	1,158	1,044
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	88	73	239	202
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	158	128	418	342
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	20	20
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	101	104	297	269
Rate-regulated electric revenues [Member] \| Pepco Holdings LLC [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,568	1,438	4,090	3,632
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	1,570	1,439	4,095	3,639
Revenue from Related Parties	3	3	9	10
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	1	2	4	3
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	808	782	2,007	1,924
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	179	150	461	392
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	401	320	1,056	825
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	16	15	47	45
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	166	172	524	453
Rate-regulated electric revenues [Member] \| Potomac Electric Power Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	730	649	1,930	1,678
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	731	650	1,931	1,680
Revenue from Related Parties	2	2	4	4
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	1	1	3	2
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	318	309	826	785
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	44	36	117	101
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	303	244	806	616
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	9	8	25	24
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	57	53	157	154
Rate-regulated electric revenues [Member] \| Delmarva Power and Light Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	373	337	1,017	899
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	374	338	1,021	904
Revenue from Related Parties	1	2	5	6
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	0	1	1	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	207	198	570	535
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	65	53	173	145
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	43	27	99	70
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	4	11	11
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	55	56	168	143
Rate-regulated electric revenues [Member] \| Atlantic City Electric Company [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	465	450	1,132	1,055
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	465	451	1,134	1,057
Revenue from Related Parties	0	1	2	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	283	275	611	604
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	70	61	171	146
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	55	49	151	139
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	3	3	11	10
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	54	63	190	158
Rate-regulated natural gas revenues [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	224	174	1,348	1,041
Rate-regulated natural gas revenues [Member] \| Operating Segment [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	224	171	1,330	1,044
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	73	56	487	365
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	73	56	486	366
Revenue from Related Parties	0	0	1	1
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	0	0	1	0
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	46	36	335	251
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	20	13	125	94
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	0	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	5	19	17
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	7	4
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	114	93	699	549
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	113	95	703	557
Revenue from Related Parties	1	3	7	10
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	1	4	2
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	70	57	448	354
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	13	10	77	59
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	28	22	128	103
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	2	6	50	41
Rate-regulated natural gas revenues [Member] \| Pepco Holdings LLC [Member]
Revenue, Major Customer [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	38	23	157	118
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	38	23	157	118
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	10	10	77	67
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	6	5	35	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	3	2	9	5
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	3	3	11	11
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	16	3	25	6
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	38	23	157	118
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	38	23	157	118
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	10	10	77	67
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	6	5	35	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	3	2	9	5
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	3	3	11	11
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	16	3	25	6
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	88	(32)	163	32
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)	3	1	20
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	(8)	(24)	(40)	(17)
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	(11)	6	(33)	94
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	(8)	9	(15)	54
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	0	(2)	(3)	17
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	$ (3)	$ 0	$ (14)	$ 23

Accounts Receivable - Allowance

Accounts Receivable - Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			$ (130)	$ (155)
Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(40)	(34)
PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(32)	(36)
Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(18)	(7)
Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(42)	(18)
Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(21)	(9)
Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(9)	(3)
Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current period provision for expected credit losses			(12)	(6)
Customer accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 354	$ 320	320	334
Current period provision for expected credit losses	38	37	141	65
Writeoffs, net of recoveries	51	32	120	74
Ending balance	341	325	341	325
Customer accounts receivable \| Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	81	89	73	97
Current period provision for expected credit losses	10	11	31	23
Writeoffs, net of recoveries	17	12	30	32
Ending balance	74	88	74	88
Customer accounts receivable \| PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	107	111	105	116
Current period provision for expected credit losses	12	1	33	7
Writeoffs, net of recoveries	16	11	35	22
Ending balance	103	101	103	101
Customer accounts receivable \| Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	57	27	38	35
Current period provision for expected credit losses	2	7	30	2
Writeoffs, net of recoveries	5	3	14	6
Ending balance	54	31	54	31
Customer accounts receivable \| Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	109	93	104	86
Current period provision for expected credit losses	14	18	47	33
Writeoffs, net of recoveries	12	6	40	14
Ending balance	111	105	111	105
Customer accounts receivable \| Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	42	38	37	32
Current period provision for expected credit losses	6	5	23	15
Writeoffs, net of recoveries	4	2	16	6
Ending balance	44	41	44	41
Customer accounts receivable \| Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	22	19	18	22
Current period provision for expected credit losses	1	3	8	4
Writeoffs, net of recoveries	3	4	6	8
Ending balance	20	18	20	18
Customer accounts receivable \| Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	45	36	49	32
Current period provision for expected credit losses	7	10	16	14
Writeoffs, net of recoveries	5	0	18	0
Ending balance	47	46	47	46
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	81	71	72	71
Current period provision for expected credit losses	8	6	24	11
Writeoffs, net of recoveries	5	4	12	9
Ending balance	84	73	84	73
Other receivables \| Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	18	18	17	21
Current period provision for expected credit losses	2	2	5	0
Writeoffs, net of recoveries	2	1	4	2
Ending balance	18	19	18	19
Other receivables \| PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	10	7	7	8
Current period provision for expected credit losses	2	1	6	2
Writeoffs, net of recoveries	1	1	2	3
Ending balance	11	7	11	7
Other receivables \| Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	11	8	9	9
Current period provision for expected credit losses	2	1	6	2
Writeoffs, net of recoveries	1	1	3	3
Ending balance	12	8	12	8
Other receivables \| Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	42	38	39	33
Current period provision for expected credit losses	2	2	7	7
Writeoffs, net of recoveries	1	0	3	0
Ending balance	43	40	43	40
Other receivables \| Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	20	16	16	13
Current period provision for expected credit losses	2	1	6	4
Writeoffs, net of recoveries	0	0	0	0
Ending balance	22	17	22	17
Other receivables \| Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	8	9	8	9
Current period provision for expected credit losses	(1)	(1)	(1)	(1)
Writeoffs, net of recoveries	0	0	0	0
Ending balance	7	8	7	8
Other receivables \| Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	14	13	15	11
Current period provision for expected credit losses	1	2	2	4
Writeoffs, net of recoveries	1	0	3	0
Ending balance	$ 14	$ 15	$ 14	$ 15

Accounts Receivable - Unbilled

Accounts Receivable - Unbilled Customer Revenue (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	$ 500	$ 747
Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	126	240
PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	121	161
Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	102	171
Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	151	175
Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	74	82
Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	35	53
Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled customer revenue	$ 42	$ 40

Accounts Receivable - Purchases

Accounts Receivable - Purchases and Sales of Accounts Receivable (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	$ 3,088	$ 2,962
Commonwealth Edison Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	753	810
PECO Energy Co [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	832	795
Baltimore Gas and Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	607	531
Pepco Holdings LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	896	826
Potomac Electric Power Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	559	504
Delmarva Power and Light Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	168	166
Atlantic City Electric Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Purchase	169	156
Exelon Generation Co LLC Affiliate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Related Parties, Purchase	4	17
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	$ 17

Asset Impairments - Narrative (

Asset Impairments - Narrative (Details) $ in Millions	9 Months Ended
Asset Impairments - Narrative (Details) $ in Millions	Sep. 30, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	$ 46
Asset Impairment Charges	46
Baltimore Gas and Electric Company [Member]
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	46
Asset Impairment Charges	$ 46

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions					9 Months Ended	84 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Jan. 01, 2031	Jan. 01, 2023	Aug. 16, 2022	Jul. 08, 2022	Sep. 30, 2022	Jan. 01, 2031	Mar. 31, 2022
Income Tax Additional Narrative Information [Line Items]
Income tax expense related to separation					$ 148
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount					67
Income Tax Credits and Adjustments					15
Income Taxes Receivable, Current					55		$ 55
Notes Payable, Current					102		11
Notes Payable, Noncurrent					392		$ 484
Increase (Decrease) in Income Taxes		$ 200
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					159
PECO Energy Co [Member]
Income Tax Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets					(301)
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 Tax Credits and Adjustments					17
Total transaction costs taxes relating to the Separation					24
PENNSYLVANIA
Income Tax Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets					428
Increase (Decrease) in Deferred Income Taxes					390
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	4.99%	8.99%		9.99%		(0.50%)
Increase (Decrease) in Income Taxes					38
PENNSYLVANIA \| PECO Energy Co [Member]
Income Tax Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets					428
Increase (Decrease) in Deferred Income Taxes					390
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	4.99%	8.99%		9.99%		(0.50%)
Increase (Decrease) in Income Taxes					$ 38

Income Taxes - Reconciliation t

Income Taxes - Reconciliation to Effective Tax Rate (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jan. 01, 2023	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
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		9%	7.10%	9.50%	3.80%
Plant basis differences		(5.30%)	(4.70%)	(4.20%)	(4.00%)
Excess deferred tax amortization		(11.60%)	(15.50%)	(11.30%)	(13.50%)
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		(0.60%)	(0.60%)	0.30%	(0.60%)
Other		(0.40%)	(0.10%)	2.80%	(1.10%)
Effective income tax rate		12%	7.10%	18%	5.50%
Increase (Decrease) in Income Taxes	$ 200
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount				$ 67
Income Tax Credits and Adjustments				15
Total transaction costs relating to the Separation				19
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount				40
PENNSYLVANIA
Increase (decrease) due to:
Increase (Decrease) in Income Taxes				38
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
Income Tax Credits and Adjustments				17
Current State and Local Tax Expense (Benefit)				43
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		8%	8%	7.90%	7.60%
Plant basis differences		(0.40%)	(0.80%)	(0.50%)	(0.70%)
Excess deferred tax amortization		(5.60%)	(7.60%)	(5.70%)	(7.20%)
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%)	(0.50%)	(0.30%)	(0.50%)
Other		(0.10%)	0.30%	0%	(1.30%)
Effective income tax rate		22.40%	20.30%	22.30%	18.80%
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		20.70%	(4.10%)	6.60%	(2.60%)
Plant basis differences		(14.20%)	(16.20%)	(12.20%)	(12.60%)
Excess deferred tax amortization		(3.20%)	(3.40%)	(3.20%)	(3.30%)
Amortization of investment tax credit, including deferred taxes on basis difference		0%	0%	0%	0%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent		0%	0%	0%	0%
Other		0.30%	(0.10%)	0.20%	(0.20%)
Effective income tax rate		24.60%	(2.80%)	12.40%	2.30%
PECO Energy Co [Member] \| PENNSYLVANIA
Increase (decrease) due to:
Increase (Decrease) in Income Taxes				$ 38
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%	(13.00%)	2.80%	(10.80%)
Plant basis differences		(2.60%)	(1.40%)	(1.10%)	(1.50%)
Excess deferred tax amortization		(47.30%)	(17.30%)	(20.70%)	(16.00%)
Amortization of investment tax credit, including deferred taxes on basis difference		(0.20%)	(0.10%)	(0.10%)	(0.10%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent		(1.90%)	(0.90%)	(0.70%)	(0.90%)
Other		(2.70%)	(0.80%)	(0.10%)	(0.70%)
Effective income tax rate		(26.90%)	(12.50%)	1.10%	(9.00%)
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		1.40%	5%	2%	4.60%
Plant basis differences		(1.70%)	(1.30%)	(1.70%)	(1.30%)
Excess deferred tax amortization		(19.30%)	(24.90%)	(18.80%)	(22.80%)
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		(0.90%)	(0.50%)	(0.70%)	(0.50%)
Other		0.30%	0%	0.20%	(0.30%)
Effective income tax rate		0.70%	(0.80%)	1.90%	0.60%
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		(2.70%)	3.40%	(3.20%)	2.50%
Plant basis differences		(2.30%)	(2.00%)	(2.40%)	(1.90%)
Excess deferred tax amortization		(14.60%)	(17.60%)	(15.40%)	(17.40%)
Amortization of investment tax credit, including deferred taxes on basis difference		0%	0%	0%	0%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent		(0.80%)	(0.50%)	(0.60%)	(0.50%)
Other		0.10%	0.10%	(0.20%)	(0.40%)
Effective income tax rate		0.70%	4.40%	(0.80%)	3.30%
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		6.50%	6.40%	6.50%	6.50%
Plant basis differences		(0.80%)	(0.60%)	(0.70%)	(0.70%)
Excess deferred tax amortization		(21.70%)	(19.90%)	(20.40%)	(19.70%)
Amortization of investment tax credit, including deferred taxes on basis difference		(0.20%)	(0.20%)	(0.20%)	(0.20%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent		(1.30%)	(0.40%)	(0.70%)	(0.40%)
Other		0.20%	(0.60%)	0.30%	(0.20%)
Effective income tax rate		3.70%	5.70%	5.80%	6.30%
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%	7%	6.90%	7.30%
Plant basis differences		(1.00%)	(0.60%)	(1.10%)	(0.60%)
Excess deferred tax amortization		(25.50%)	(41.40%)	(24.70%)	(36.30%)
Amortization of investment tax credit, including deferred taxes on basis difference		(0.20%)	(0.20%)	(0.20%)	(0.20%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent		(0.70%)	(0.50%)	(0.60%)	(0.50%)
Other		0.50%	0.80%	0.20%	0%
Effective income tax rate		1.10%	(13.90%)	1.50%	(9.30%)

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 148	$ 143
Income Taxes Receivable, Noncurrent	50
Pepco Holdings LLC [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	59	56
Atlantic City Electric Company [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits	$ 17	$ 16

Income Taxes - Allocation of Ta

Income Taxes - Allocation of Tax Benefits (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Commonwealth Edison Co [Member]
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	$ 1	$ 1
PECO Energy Co [Member]
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	47	19
Baltimore Gas and Electric Company [Member]
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	0	0
Pepco Holdings LLC [Member]
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	28	17
Potomac Electric Power Company [Member]
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	23	16
Delmarva Power and Light Company [Member]
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	3	0
Atlantic City Electric Company [Member]
Allocation of Tax Benefits [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	$ 2	$ 0

Retirement Benefits - Narrative

Retirement Benefits - Narrative (Details) - USD ($) $ in Millions	8 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Feb. 01, 2022
Defined Benefit Plan Disclosure [Line Items]
Increase (Decrease) in Obligation, Pension Benefits	$ (921)	$ (24)
Increase (Decrease) in Obligation, Other Postretirement Benefits	(893)	5
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax	5	5	$ (1,994)
Defined Benefit Plan Amounts Recognized In Regulatory Assets Before Tax	14	(30)
Defined Benefit Plan Amounts Recognized In Regulatory Liabilities Before Tax	$ 5	$ (3)
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on assets		7,000,000%
Discount rate		3,240,000%
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on assets		6,440,000%
Discount rate		3,200,000%

Retirement Benefits - Calculati

Retirement Benefits - Calculation of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Amortization of:
Non-service net periodic benefit cost	$ 16	$ 19	$ 48	$ 64
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	58	74	177	222
Interest cost	110	102	330	304
Expected return on assets	(205)	(212)	(619)	(633)
Amortization of:
Prior service cost (credit)	1	1	3	3
Actuarial loss	73	100	222	299
Curtailment benefits			0	0
Settlement charges	0	2	0	2
Non-service net periodic benefit cost	37	67	113	197
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	13	30	38
Interest cost	19	18	57	52
Expected return on assets	(25)	(26)	(75)	(75)
Amortization of:
Prior service cost (credit)	(5)	(6)	(15)	(18)
Actuarial loss	4	7	12	19
Curtailment benefits			0	(1)
Settlement charges	0	0	0	0
Non-service net periodic benefit cost	$ 3	$ 6	$ 9	$ 15

Retirement Benefits - Allocated

Retirement Benefits - Allocated Portion of Pension and Postretirement Benefit Plan Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			$ 124	$ 304
Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	$ 40	$ 73	122	212
Commonwealth Edison Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			45	97
Commonwealth Edison Co [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	15	32	45	97
PECO Energy Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			(6)	5
PECO Energy Co [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	(2)	2	(6)	5
Baltimore Gas and Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			34	45
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	11	16	33	47
Pepco Holdings LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			39	36
Pepco Holdings LLC [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	13	12	39	36
Potomac Electric Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			6	5
Potomac Electric Power Company [Member] \| Pension and other post retirement benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs	2	2	6	5
Delmarva Power and Light Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			3	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	1	1	3	2
Atlantic City Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Benefits Costs			9	8
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	$ 9	$ 8

Retirement Benefits - Defined C

Retirement Benefits - Defined Contribution Savings Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 23	$ 24	$ 66	$ 67
Commonwealth Edison Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	11	9	29	27
PECO Energy Co [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	3	2	9	8
Baltimore Gas and Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	2	4	7	8
Pepco Holdings LLC [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	4	5	11	12
Potomac Electric Power Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	3	3
Delmarva Power and Light Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	3	3
Atlantic City Electric Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 1	$ 1	$ 2	$ 2

Derivative Financial Instrume_2

Derivative Financial Instruments - Narrative (Details) MWh in Millions, $ in Millions	1 Months Ended	9 Months Ended
	Jun. 30, 2012 MWh	Sep. 30, 2022 USD ($)	Oct. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Derivative [Line Items]
Other		$ 1,313		$ 766
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. 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. 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. 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. 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 2021 Recast Form 10-K for additional information. (b) The fair value of the DPL economic hedge is not material as of September 30, 2022 and December 31, 2021. 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. The Mark-to-market derivative assets included in Other current assets in Exelon’s and ComEd’s Consolidated Balance Sheets were $24 million and none as of September 30, 2022 and December 31, 2021, respectively. Cash Flow Hedges (Interest Rate Risk) (Exelon) Exelon uses a combination of fixed-rate and variable-rate debt to manage interest rate exposure. In addition, Exelon may utilize interest rate derivatives to lock in rate levels in anticipation of future financings. In October 2022, Exelon entered into $840 million of notional amount floating-to-fixed forward starting interest rate swaps to manage a portion of interest rate exposure associated with anticipated debt issuances. The swaps are designated as cash flow hedges. Changes in fair value each period will initially be recorded in AOCI starting in the fourth quarter of 2022 and recognized in earnings as interest expense is accrued on the anticipated debt issuance. Economic Hedges (Interest Rate Risk) (Exelon) Exelon may use derivative instruments to mitigate exposure to fluctuations in interest rates but for which the fair value or cash flow hedge elections are not made. In October 2022, Exelon entered into $1,850 million of notional amount floating-to-fixed interest rate cap swaps to manage a portion of interest rate exposure in connection with borrowings. The swaps are not designated as cash flow hedges. As economic hedges, changes in fair value each period will be recognized in earnings starting in the fourth quarter of 2022. 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. As of September 30, 2022, the amount of cash collateral held with external counterparties by Exelon, ComEd, BGE, PHI, Pepco, DPL, and ACE was $505 million, $95 million, $129 million, $279 million, $48 million, $157 million, and $74 million, respectively, which is recorded in Other current liabilities in Exelon's, ComEd's, BGE's, PHI's, Pepco's, DPL's, and ACE's Consolidated Balance Sheets. The amount of cash collateral received from external counterparties increased as of September 30, 2022 due to rising energy prices. The amount for PECO was not material as of September 30, 2022. As of December 31, 2021, the amounts for ComEd and DPL were $41 million and $43 million, respectively. The amounts for Exelon, PECO, BGE, PHI, Pepco, and ACE were not material as of December 31, 2021.
Fair Value, Recurring [Member]
Derivative [Line Items]
Derivative Asset		$ 24
Commonwealth Edison Co [Member]
Derivative [Line Items]
Long-term Purchase Commitment, Minimum Energy Volume Required \| MWh	1.3
Other		191		133
Commonwealth Edison Co [Member] \| Fair Value, Recurring [Member]
Derivative [Line Items]
Derivative Asset		24		0
PECO Energy Co [Member]
Derivative [Line Items]
Other		27		35
Incremental Collateral For Loss Of Investment Grade Credit Rating		43
PECO Energy Co [Member] \| Fair Value, Recurring [Member]
Derivative [Line Items]
Derivative Asset		0
Baltimore Gas and Electric Company [Member]
Derivative [Line Items]
Other		158		48
Incremental Collateral For Loss Of Investment Grade Credit Rating		79
Baltimore Gas and Electric Company [Member] \| Fair Value, Recurring [Member]
Derivative [Line Items]
Derivative Asset		0
Delmarva Power and Light Company [Member]
Derivative [Line Items]
Other		198		59
Incremental Collateral For Loss Of Investment Grade Credit Rating		16
Atlantic City Electric Company [Member]
Derivative [Line Items]
Other		81		12
Pepco Holdings LLC [Member]
Derivative [Line Items]
Other		434		171
Potomac Electric Power Company [Member]
Derivative [Line Items]
Other		81		25
Commodity Contract [Member] \| External Counterparties \| Collateral [Member]
Derivative [Line Items]
Other		505
Commodity Contract [Member] \| Commonwealth Edison Co [Member] \| External Counterparties \| Collateral [Member]
Derivative [Line Items]
Other		95		41
Commodity Contract [Member] \| Baltimore Gas and Electric Company [Member] \| External Counterparties \| Collateral [Member]
Derivative [Line Items]
Other		129
Commodity Contract [Member] \| Delmarva Power and Light Company [Member] \| External Counterparties \| Collateral [Member]
Derivative [Line Items]
Other		157		$ 43
Commodity Contract [Member] \| Atlantic City Electric Company [Member] \| External Counterparties \| Collateral [Member]
Derivative [Line Items]
Other		74
Commodity Contract [Member] \| Pepco Holdings LLC [Member] \| External Counterparties \| Collateral [Member]
Derivative [Line Items]
Other		279
Commodity Contract [Member] \| Potomac Electric Power Company [Member] \| External Counterparties \| Collateral [Member]
Derivative [Line Items]
Other		$ 48
Interest Rate Swap [Member] \| Cash Flow Hedging \| Subsequent Event [Member]
Derivative [Line Items]
Derivative, Notional Amount			$ 840
Interest Rate Cap \| Not Designated as Hedging Instrument, Economic Hedge [Member] \| Subsequent Event [Member]
Derivative [Line Items]
Derivative, Notional Amount			$ 1,850

Debt and Credit Agreements - Na

Debt and Credit Agreements - Narrative (Details) - USD ($) $ in Millions			9 Months Ended
	Oct. 07, 2022	Aug. 11, 2022	Sep. 30, 2022
Short-term Debt [Line Items]
Proceeds from (Repayments of) Debt		$ 575
Corporate, Non-Segment [Member]
Short-term Debt [Line Items]
Proceeds from (Repayments of) Debt		$ 575
Debt Instrument [Line Items]
Notes Receivable, Related Parties			$ 319
Proceeds from Sale and Collection of Notes Receivable			258
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 0.65
Corporate, Non-Segment [Member] \| ShortTermDebt03312021.1
Short-term Debt [Line Items]
Short-term Bank Loans and Notes Payable			$ 150
Corporate, Non-Segment [Member] \| ShortTermDebt03312021.1 \| London Interbank Offered Rate (LIBOR) [Member]
Short-term Debt [Line Items]
Debt Instrument, Interest Rate Terms			LIBOR plus 0.65
Corporate, Non-Segment [Member] \| ShortTermDebtSOFRplus0.75Jan2023
Short-term Debt [Line Items]
Short-term Bank Loans and Notes Payable			$ 1,150
Corporate, Non-Segment [Member] \| ShortTermDebtSOFRplus0.75Jan2023 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt Instrument, Interest Rate Terms			SOFR plus 0.75
Corporate, Non-Segment [Member] \| ShortTermDebtSOFRplus075PLUS22.5BPincreaseJan2023 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Short-term Debt [Line Items]
Debt Instrument, Interest Rate Terms			SOFR plus 0.975%
Subsequent Event [Member] \| Corporate, Non-Segment [Member]
Short-term Debt [Line Items]
Proceeds from (Repayments of) Debt	$ 575
Letter of Credit \| Subsequent Event [Member] \| Commonwealth Edison Co [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	40
Letter of Credit \| Subsequent Event [Member] \| PECO Energy Co [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	40
Letter of Credit \| Subsequent Event [Member] \| Baltimore Gas and Electric Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	15
Letter of Credit \| Subsequent Event [Member] \| Potomac Electric Power Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	15
Letter of Credit \| Subsequent Event [Member] \| Delmarva Power and Light Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	15
Letter of Credit \| Subsequent Event [Member] \| Atlantic City Electric Company [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 15
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

Debt and Credit Agreements - Co

Debt and Credit Agreements - Commercial Paper Borrowings (Details) - Commercial Paper [Member] - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Commercial Paper	$ 615	$ 599
Short-term Debt, Weighted Average Interest Rate, at Point in Time	3.37%	0.35%
Corporate [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 226	$ 0
Commonwealth Edison Co [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 233	$ 0
Short-term Debt, Weighted Average Interest Rate, at Point in Time	3.35%	0%
PECO Energy Co [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 0	$ 0
Baltimore Gas and Electric Company [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 156	$ 130
Short-term Debt, Weighted Average Interest Rate, at Point in Time	3.40%	0.37%
Pepco Holdings LLC [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 0	$ 469
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0%	0.35%
Potomac Electric Power Company [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 0	$ 175
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0%	0.33%
Delmarva Power and Light Company [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 0	$ 149
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0%	0.36%
Atlantic City Electric Company [Member]
Short-term Debt [Line Items]
Commercial Paper	$ 0	$ 145
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0%	0.35%

Debt and Credit Agreements - Su

Debt and Credit Agreements - Summary of Revolving Credit Agreements (Details) - Revolving Credit Facility [Member] $ in Millions	Sep. 30, 2022 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) - USD ($) $ in Millions	18 Months Ended
	Apr. 07, 2024	Oct. 07, 2022	Sep. 30, 2022
Corporate [Member] \| SMBCTermLoanJuly2023 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			0.65%
Debt Instrument, Face Amount			$ 300
Corporate [Member] \| USBTermLoanJuly2023 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			0.65%
Debt Instrument, Face Amount			$ 300
Corporate [Member] \| PNCTermLoanJuly2023 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			0.65%
Debt Instrument, Face Amount			$ 250
Corporate [Member] \| Notes275Mar2027 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			2.75%
Debt Instrument, Face Amount			$ 650
Corporate [Member] \| Notes335Mar2032 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			3.35%
Debt Instrument, Face Amount			$ 650
Corporate [Member] \| Notes410Mar2052 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			4.10%
Debt Instrument, Face Amount			$ 700
Corporate [Member] \| Notes230Dec2025 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			2.30%
Debt Instrument, Face Amount			$ 17
Corporate [Member] \| CorpTermLoanApr2024 \| Notes Payable to Banks [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500
Debt Instrument, Interest Rate Terms	SOFR plus 0.85
Commonwealth Edison Co [Member] \| FMB315Mar2032 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			3.15%
Debt Instrument, Face Amount			$ 300
Commonwealth Edison Co [Member] \| FMB385Mar2052 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			3.85%
Debt Instrument, Face Amount			$ 450
PECO Energy Co [Member] \| FMB350May2052 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			4.60%
Debt Instrument, Face Amount			$ 350
PECO Energy Co [Member] \| FMB425August2052 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			4.375%
Debt Instrument, Face Amount			$ 425
Baltimore Gas and Electric Company [Member] \| Notes500June2052 \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Interest Rate			4.55%
Debt Instrument, Face Amount			$ 500
Potomac Electric Power Company [Member] \| FMB397Mar2052 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			3.97%
Debt Instrument, Face Amount			$ 400
Potomac Electric Power Company [Member] \| FMB335Sep2032 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			3.35%
Debt Instrument, Face Amount			$ 225
Delmarva Power and Light Company [Member] \| FMB306Feb2052 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			3.06%
Debt Instrument, Face Amount			$ 125
Atlantic City Electric Company [Member] \| FMB227Feb2032 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			2.27%
Debt Instrument, Face Amount			$ 25
Atlantic City Electric Company [Member] \| ACEFMB306Feb20502 \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Interest Rate			3.06%
Debt Instrument, Face Amount			$ 150

Fair Value of Financial Asset_3

Fair Value of Financial Assets and Liabilities - Fair Value of Financial Liabilities Recorded at Amortized Cost (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt to financing trust	$ 390	$ 390
Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	36,583	32,902
Long-term debt to financing trust	390	390
Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	30,924	37,114
Long-term debt to financing trust	385	470
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	0	0
Long-term debt to financing trust	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	28,654	34,897
Long-term debt to financing trust	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	2,270	2,217
Long-term debt to financing trust	385	470
Commonwealth Edison Co [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt to financing trust	205	205
Commonwealth Edison Co [Member] \| Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	10,517	9,773
Long-term debt to financing trust	205	205
Commonwealth Edison Co [Member] \| Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	8,783	11,305
Long-term debt to financing trust	204	248
Commonwealth Edison Co [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	0	0
Long-term debt to financing trust	0	0
Commonwealth Edison Co [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	8,783	11,305
Long-term debt to financing trust	0	0
Commonwealth Edison Co [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	0	0
Long-term debt to financing trust	204	248
PECO Energy Co [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt to financing trust	184	184
PECO Energy Co [Member] \| Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	4,612	4,197
Long-term debt to financing trust	184	184
PECO Energy Co [Member] \| Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	3,797	4,790
Long-term debt to financing trust	181	222
PECO Energy Co [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	0	0
Long-term debt to financing trust	0	0
PECO Energy Co [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	3,747	4,740
Long-term debt to financing trust	0	0
PECO Energy Co [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	50	50
Long-term debt to financing trust	181	222
Baltimore Gas and Electric Company [Member] \| Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	4,207	3,961
Baltimore Gas and Electric Company [Member] \| Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	3,539	4,406
Baltimore Gas and Electric Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
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]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	3,539	4,406
Baltimore Gas and Electric Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	0	0
Pepco Holdings LLC [Member] \| Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	8,130	7,547
Pepco Holdings LLC [Member] \| Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	6,654	8,137
Pepco Holdings LLC [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
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]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	4,434	5,970
Pepco Holdings LLC [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	2,220	2,167
Potomac Electric Power Company [Member] \| Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	3,752	3,445
Potomac Electric Power Company [Member] \| Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	3,353	4,176
Potomac Electric Power Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
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]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	2,179	3,201
Potomac Electric Power Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	1,174	975
Delmarva Power and Light Company [Member] \| Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	1,938	1,810
Delmarva Power and Light Company [Member] \| Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	1,589	1,978
Delmarva Power and Light Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
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]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	1,143	1,426
Delmarva Power and Light Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	446	552
Atlantic City Electric Company [Member] \| Reported Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	1,758	1,582
Atlantic City Electric Company [Member] \| Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	1,503	1,732
Atlantic City Electric Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
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]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	903	1,091
Atlantic City Electric Company [Member] \| Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt (including amounts due within one year)	$ 600	$ 641

Fair Value of Financial Asset_4

Fair Value of Financial Assets and Liabilities - Fair Value Measurements of Assets and Liabilities, Recurring and Nonrecurring (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities (current liabilities)	$ 0	$ 18
Derivative Liability, Noncurrent	67	201
Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	664	524
Derivative Asset	24
Assets, Fair Value Disclosure	903	752
Deferred Compensation Liability, Current and Noncurrent	(68)	(131)
Total Liabilities	(135)	(350)
Fair Value, Net Asset (Liability)	768	402
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	(67)	(219)
Fair Value, Recurring [Member] \| Cash and Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	384	464
Fair Value, Recurring [Member] \| Restricted cash member [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	225	49
Fair Value, Recurring [Member] \| Other Assets [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	83	44
Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	215	228
Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	62	60
Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	49	60
Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	8	10
Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	96	98
Fair Value, Recurring [Member] \| Economic Hedges [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	24	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	664	524
Assets, Fair Value Disclosure	775	644
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	775	644
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] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	111	120
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	60
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	49	60
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] \| Economic Hedges [Member]
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	65	71
Deferred Compensation Liability, Current and Noncurrent	(68)	(131)
Total Liabilities	(68)	(131)
Fair Value, Net Asset (Liability)	(3)	(60)
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	0	0
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	71
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	8	10
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	57	61
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Economic Hedges [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]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	63	37
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	(67)	(219)
Fair Value, Net Asset (Liability)	(4)	(182)
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	(67)	(219)
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	39	37
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	39	37
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Economic Hedges [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Derivative Asset	24	0
Commonwealth Edison Co [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities (current liabilities)	0	18
Derivative Liability, Noncurrent	67	201
Commonwealth Edison Co [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	354	237
Derivative Asset	24	0
Assets, Fair Value Disclosure	378	237
Total mark-to-market derivative liabilities	(67)	(219)
Deferred Compensation Liability, Current and Noncurrent	(7)	(10)
Total Liabilities	(74)	(229)
Fair Value, Net Asset (Liability)	304	8
Mark-to-market derivative liabilities (current liabilities)	0	18
Derivative Liability, Noncurrent	(67)	201
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	39	105
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	95	42
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	83	43
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	354	237
Derivative Asset	0
Assets, Fair Value Disclosure	354	237
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)	354	237
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
Derivative Asset	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(7)	(10)
Total Liabilities	(7)	(10)
Fair Value, Net Asset (Liability)	(7)	(10)
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
Derivative Asset	24
Assets, Fair Value Disclosure	24	0
Total mark-to-market derivative liabilities	(67)	(219)
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	(67)	(219)
Fair Value, Net Asset (Liability)	(43)	(219)
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
PECO Energy Co [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	10	9
Derivative Asset	0
Assets, Fair Value Disclosure	33	36
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(7)	(9)
Total Liabilities	(7)	(9)
Fair Value, Net Asset (Liability)	26	27
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	93	35
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	23	27
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	8	11
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	15	16
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	10	9
Derivative Asset	0
Assets, Fair Value Disclosure	18	20
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)	18	20
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	8	11
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	8	11
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
Derivative Asset	0
Assets, Fair Value Disclosure	15	16
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(7)	(9)
Total Liabilities	(7)	(9)
Fair Value, Net Asset (Liability)	8	7
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	15	16
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	15	16
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
Derivative Asset	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
Baltimore Gas and Electric Company [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1	0
Derivative Asset	0
Assets, Fair Value Disclosure	8	14
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(4)	(7)
Total Liabilities	(4)	(7)
Fair Value, Net Asset (Liability)	4	7
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	20	51
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	129	4
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	7	14
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	7	14
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	1	0
Derivative Asset	0
Assets, Fair Value Disclosure	8	14
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)	8	14
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	7	14
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	7	14
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
Derivative Asset	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(4)	(7)
Total Liabilities	(4)	(7)
Fair Value, Net Asset (Liability)	(4)	(7)
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
Derivative Asset	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
Pepco Holdings LLC [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	266	110
Assets, Fair Value Disclosure	403	255
Deferred Compensation Liability, Current and Noncurrent	(14)	(18)
Total Liabilities	(14)	(18)
Fair Value, Net Asset (Liability)	389	237
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	186	100
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	1	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	137	145
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	59	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	10	14
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	8	10
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	60	62
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	266	110
Assets, Fair Value Disclosure	335	183
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	335	183
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	69	73
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	59	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	10	14
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	30	37
Deferred Compensation Liability, Current and Noncurrent	(14)	(18)
Total Liabilities	(14)	(18)
Fair Value, Net Asset (Liability)	16	19
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	30	37
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	8	10
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	22	27
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	38	35
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	38	35
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	38	35
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	38	35
Potomac Electric Power Company [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	76	31
Assets, Fair Value Disclosure	195	151
Deferred Compensation Liability, Current and Noncurrent	(1)	(2)
Total Liabilities	(1)	(2)
Fair Value, Net Asset (Liability)	194	149
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	21	34
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	1	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	119	120
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	59	58
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	60	62
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	76	31
Assets, Fair Value Disclosure	135	89
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	135	89
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	59	58
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	59	58
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	22	27
Deferred Compensation Liability, Current and Noncurrent	(1)	(2)
Total Liabilities	(1)	(2)
Fair Value, Net Asset (Liability)	21	25
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	22	27
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	22	27
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	38	35
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	38	35
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	38	35
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	38	35
Delmarva Power and Light Company [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	157	43
Assets, Fair Value Disclosure	157	43
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	157	43
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	49	28
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	157	43
Assets, Fair Value Disclosure	157	43
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	157	43
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
Atlantic City Electric Company [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1	0
Assets, Fair Value Disclosure	1	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	1	0
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	111	29
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	0
Assets, Fair Value Disclosure	1	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total Liabilities	0	0
Fair Value, Net Asset (Liability)	1	0
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

Fair Value of Financial Asset_5

Fair Value of Financial Assets and Liabilities - Fair Value Assets Liabilities Measured On Recurring Basis Unobservable Input Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fair Value, Inputs, Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ (50)	$ (231)	$ (182)	$ (267)
Total realized / unrealized gains (losses)
Included in net income(a)	1		3	2
Included in regulatory assets	45	51	176	87
Purchases, sales, issuances and settlements
Settlements				(2)
Transfers out of Level 3			(1)
Ending Balance	(4)	(180)	(4)	(180)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	1	0	3	2
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)	(6)	2	(3)	15
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	(88)	(265)	(219)	(301)
Total realized / unrealized gains (losses)
Included in net income(a)	0		0	0
Included in regulatory assets	45	51	176	87
Purchases, sales, issuances and settlements
Settlements				0
Transfers out of Level 3			0
Ending Balance	(43)	(214)	(43)	(214)
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)	(51)	(49)	(179)	(72)
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	37	34	35	34
Total realized / unrealized gains (losses)
Included in net income(a)	1		3	2
Included in regulatory assets	0	0	0	0
Purchases, sales, issuances and settlements
Settlements				(2)
Transfers out of Level 3			0
Ending Balance	38	34	38	34
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	1	0	3	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	37	34	35	34
Total realized / unrealized gains (losses)
Included in net income(a)	1		3	2
Included in regulatory assets	0	0	0	0
Purchases, sales, issuances and settlements
Settlements				(2)
Transfers out of Level 3			0
Ending Balance	38	34	38	34
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	$ 1	$ 0	$ 3	$ 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 ($)	Sep. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ (43,000,000)	$ (219,000,000)
Discounted Cash Flow [Member] \| Minimum [Member]
Derivatives Fair Value Footnotes [Abstract]
Fair Value Inputs Forward Power Price	36.02	28.65
Discounted Cash Flow [Member] \| Maximum [Member]
Derivatives Fair Value Footnotes [Abstract]
Fair Value Inputs Forward Power Price	111.10	47.10
Discounted Cash Flow [Member] \| Arithmetic Average [Member]
Derivatives Fair Value Footnotes [Abstract]
Fair Value Inputs Forward Power Price	50.61	33.96
Commonwealth Edison Co [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ (43,000,000)	$ (219,000,000)
Commonwealth Edison Co [Member] \| Discounted Cash Flow [Member] \| Minimum [Member]
Derivatives Fair Value Footnotes [Abstract]
Fair Value Inputs Forward Power Price	36.02	28.65
Commonwealth Edison Co [Member] \| Discounted Cash Flow [Member] \| Maximum [Member]
Derivatives Fair Value Footnotes [Abstract]
Fair Value Inputs Forward Power Price	111.10	47.10
Commonwealth Edison Co [Member] \| Discounted Cash Flow [Member] \| Arithmetic Average [Member]
Derivatives Fair Value Footnotes [Abstract]
Fair Value Inputs Forward Power Price	50.61	33.96

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) $ in Millions		1 Months Ended	3 Months Ended			12 Months Ended
	Mar. 23, 2016 MW	Nov. 30, 2020 USD ($)	Sep. 30, 2022 USD ($) MGPSite	Mar. 31, 2019 MW	Mar. 31, 2018 MW	Dec. 31, 2022 MW	Dec. 31, 2021 USD ($)
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			$ 630
Accrual for Environmental Loss Contingencies, Gross			405				$ 352
Commonwealth Edison Co [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			$ 256
Mgp Site Contingency Monitoring Count \| MGPSite			20
Accrual for Environmental Loss Contingencies, Gross			$ 328				279
Deferred Prosecution Agreement Payments		$ 200
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]
Other Commitment			$ 181
Mgp Site Contingency Monitoring Count \| MGPSite			6
Accrual for Environmental Loss Contingencies, Gross			$ 25				22
Baltimore Gas and Electric Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			$ 5
Mgp Site Contingency Monitoring Count \| MGPSite			4
Accrual for Environmental Loss Contingencies, Gross			$ 7				6
Pepco Holdings LLC [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			126
Accrual for Environmental Loss Contingencies, Gross			41				42
Potomac Electric Power Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			95
Accrual for Environmental Loss Contingencies, Gross			39				40
Delmarva Power and Light Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			$ 20
Mgp Site Contingency Count \| MGPSite			1
Accrual for Environmental Loss Contingencies, Gross			$ 1				1
Pepco Holdings Inc [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			513
Pepco Holdings Inc [Member] \| Pepco Holdings LLC [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			320
Pepco Holdings Inc [Member] \| Potomac Electric Power Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			120
Pepco Holdings Inc [Member] \| Delmarva Power and Light Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Other Commitment			89
Accrual For MGP Investigation And Remediation [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross			358				303
Accrual For MGP Investigation And Remediation [Member] \| Commonwealth Edison Co [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross			328				279
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)			60
Accrual For MGP Investigation And Remediation [Member] \| PECO Energy Co [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross			24				20
Accrual For MGP Investigation And Remediation [Member] \| Baltimore Gas and Electric Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross			6				4
Accrual For MGP Investigation And Remediation [Member] \| Pepco Holdings LLC [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross			0				0
Accrual For MGP Investigation And Remediation [Member] \| Potomac Electric Power Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross			0				0
Accrual For MGP Investigation And Remediation [Member] \| Delmarva Power and Light Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Accrual for Environmental Loss Contingencies, Gross			$ 0				$ 0
Wind Assets [Member] \| Pepco Holdings Inc [Member] \| Delmarva Power and Light Company [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Purchase Commitment \| MW	120			40	40
Wind Assets [Member] \| Pepco Holdings Inc [Member] \| Delmarva Power and Light Company [Member] \| Forecast [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Purchase Commitment \| MW						40

Commitments and Contingencies_3

Commitments and Contingencies - Merger Commitment (Details) $ in Millions	Sep. 30, 2022 USD ($)
Other Commitments [Line Items]
Other Commitment	$ 630
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	20
Atlantic City Electric Company [Member]
Other Commitments [Line Items]
Other Commitment	11
Pepco Holdings Inc [Member]
Other Commitments [Line Items]
Other Commitment	513
Pepco Holdings Inc [Member] \| Remaining commitment
Other Commitments [Line Items]
Other Commitment	57
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	50
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	41
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	6
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	$ 3

Commitments and Contingencies_4

Commitments and Contingencies - Schedule of Commercial Commitments (Details) $ in Millions	Sep. 30, 2022 USD ($)
Other Commitments [Line Items]
Other Commitment	$ 630
Other Commitment, to be Paid, Remainder of Fiscal Year	90
Other Commitment, to be Paid, Year One	131
Other Commitment, to be Paid, Year Two	8
Other Commitment, to be Paid, Year Three	6
Other Commitment, to be Paid, Year Four	5
Other Commitment, to be Paid, Year Five and Beyond	390
Guarantor Obligations, Maximum Exposure, Undiscounted	73
Letters of Credit
Other Commitments [Line Items]
Other Commitment	17
Other Commitment, to be Paid, Remainder of Fiscal Year	5
Other Commitment, to be Paid, Year One	12
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	205
Other Commitment, to be Paid, Remainder of Fiscal Year	85
Other Commitment, to be Paid, Year One	118
Other Commitment, to be Paid, Year Two	2
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	30
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	6
Other Commitment, to be Paid, Year Three	6
Other Commitment, to be Paid, Year Four	5
Other Commitment, to be Paid, Year Five and Beyond	12
Commonwealth Edison Co [Member]
Other Commitments [Line Items]
Other Commitment	256
Other Commitment, to be Paid, Remainder of Fiscal Year	7
Other Commitment, to be Paid, Year One	47
Other Commitment, to be Paid, Year Two	2
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	10
Other Commitment, to be Paid, Remainder of Fiscal Year	2
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
Commonwealth Edison Co [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	46
Other Commitment, to be Paid, Remainder of Fiscal Year	5
Other Commitment, to be Paid, Year One	39
Other Commitment, to be Paid, Year Two	2
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	0
Other Commitment, to be Paid, Year One	3
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	178
PECO Energy Co [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	2
Other Commitment, to be Paid, Remainder of Fiscal Year	0
Other Commitment, to be Paid, Year One	2
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
PECO Energy Co [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	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
Baltimore Gas and Electric Company [Member] \| Letters of Credit
Other Commitments [Line Items]
Other Commitment	3
Other Commitment, to be Paid, Remainder of Fiscal Year	2
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
Baltimore Gas and Electric Company [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
Pepco Holdings LLC [Member]
Other Commitments [Line Items]
Other Commitment	126
Other Commitment, to be Paid, Remainder of Fiscal Year	75
Other Commitment, to be Paid, Year One	22
Other Commitment, to be Paid, Year Two	6
Other Commitment, to be Paid, Year Three	6
Other Commitment, to be Paid, Year Four	5
Other Commitment, to be Paid, Year Five and Beyond	12
Guarantor Obligations, Maximum Exposure, Undiscounted	73
Pepco Holdings LLC [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	96
Other Commitment, to be Paid, Remainder of Fiscal Year	75
Other Commitment, to be Paid, Year One	21
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	30
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	6
Other Commitment, to be Paid, Year Three	6
Other Commitment, to be Paid, Year Four	5
Other Commitment, to be Paid, Year Five and Beyond	12
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	14
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	24
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	0
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
Delmarva Power and Light Company [Member]
Other Commitments [Line Items]
Other Commitment	20
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	3
Other Commitment, to be Paid, Year Three	3
Other Commitment, to be Paid, Year Four	2
Other Commitment, to be Paid, Year Five and Beyond	5
Guarantor Obligations, Maximum Exposure, Undiscounted	30
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	13
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	3
Other Commitment, to be Paid, Year Three	3
Other Commitment, to be Paid, Year Four	2
Other Commitment, to be Paid, Year Five and Beyond	5
Atlantic City Electric Company [Member]
Other Commitments [Line Items]
Other Commitment	11
Other Commitment, to be Paid, Remainder of Fiscal Year	1
Other Commitment, to be Paid, Year One	4
Other Commitment, to be Paid, Year Two	1
Other Commitment, to be Paid, Year Three	1
Other Commitment, to be Paid, Year Four	1
Other Commitment, to be Paid, Year Five and Beyond	3
Guarantor Obligations, Maximum Exposure, Undiscounted	19
Atlantic City Electric Company [Member] \| Surety Bonds
Other Commitments [Line Items]
Other Commitment	4
Other Commitment, to be Paid, Remainder of Fiscal Year	1
Other Commitment, to be Paid, Year One	3
Other Commitment, to be Paid, Year Two	0
Other Commitment, to be Paid, Year Three	0
Other Commitment, to be Paid, Year Four	0
Other Commitment, to be Paid, Year Five and Beyond	0
Atlantic City Electric Company [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	8 years

Commitments and Contingencies_5

Commitments and Contingencies - Schedule of Accruals for Environmental Matters (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	$ 405	$ 352
Commonwealth Edison Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	328	279
PECO Energy Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	25	22
Baltimore Gas and Electric Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	7	6
Pepco Holdings LLC [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	41	42
Potomac Electric Power Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	39	40
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	358	303
Accrual For MGP Investigation And Remediation [Member] \| Commonwealth Edison Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	328	279
Accrual For MGP Investigation And Remediation [Member] \| PECO Energy Co [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	24	20
Accrual For MGP Investigation And Remediation [Member] \| Baltimore Gas and Electric Company [Member]
Site Contingency [Line Items]
Total environmental investigation and remediation reserve	6	4
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

Shareholder's Equity (Details)

Shareholder's Equity (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Aug. 11, 2022	Sep. 30, 2022	Aug. 04, 2022
Stock Issued During Period, Shares, New Issues		12,995,000
Share Price			$ 43.32
Proceeds from Issuance or Sale of Equity		$ 563
Proceeds from (Repayments of) Debt	$ 575
Equity Distribution Agreement			$ 1,000
Corporate, Non-Segment [Member]
Proceeds from (Repayments of) Debt	$ 575
Corporate, Non-Segment [Member] \| ShortTermDebtSOFRplus0.75Jan2023
Short-term Bank Loans and Notes Payable		$ 1,150
Initial Equity Securities Offering
Stock Issued During Period, Shares, New Issues		11,300,000
Additional Equity Securities Offering
Stock Issued During Period, Shares, New Issues		1,695,000

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income - Schedule of Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 23,656	$ 23,491	$ 34,795	$ 34,500	$ 34,313	$ 34,868	$ 34,795	$ 34,868
Other comprehensive income (loss), net of income taxes	9	12	14	66	57	54	35	177
Ending balance	24,582	23,656	23,491	34,259	34,500	34,313	24,582	34,259
Gains (Losses) on Cash Flow Hedges
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	0		(6)	(5)		(5)	(6)	(5)
OCI before reclassifications				0			0	(1)
Amounts reclassified from AOCI	0			0			0	0
Other comprehensive income (loss), net of income taxes	0			0			0	(1)
Ending balance	0	0		(6)	(5)		0	(6)
Gains (Losses) on Cash Flow Hedges \| Total
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Ending balance				(5)				(5)
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	(701)		(2,721)	(3,264)		(3,372)	(2,721)	(3,372)
OCI before reclassifications				14			2	15
Amounts reclassified from AOCI	9			55			33	163
Other comprehensive income (loss), net of income taxes	9			69			35	178
Ending balance	(692)	(701)		(3,194)	(3,264)		(692)	(3,194)
Pension and Non-Pension Postretirement Benefit Plan Items \| Total
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Ending balance				(3,195)				(3,195)
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		(23)	(20)		(23)	(23)	(23)
OCI before reclassifications				(3)			0	0
Amounts reclassified from AOCI	0			0			0	0
Other comprehensive income (loss), net of income taxes	0			(3)			0	0
Ending balance	0	0		(23)	(20)		0	(23)
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	(701)	(713)	(2,750)	(3,289)	(3,346)	(3,400)	(2,750)	(3,400)
OCI before reclassifications				11			2	14
Amounts reclassified from AOCI	9			55			33	163
Other comprehensive income (loss), net of income taxes	9	12	14	66	57	54	35	177
Ending balance	$ (692)	$ (701)	$ (713)	$ (3,223)	$ (3,289)	$ (3,346)	(692)	$ (3,223)
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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Prior service costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	$ 0	$ 1	$ 0	$ 3
Actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	(3)	(19)	(11)	(57)
Pension and Non-Pension Postretirement Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Tax	$ 0	$ (7)	$ 0	$ (8)

Supplemental Financial Inform_3

Supplemental Financial Information - Operations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other, Net [Abstract]
AFUDC - Equity	$ 38	$ 36	$ 112	$ 99
Non-service net periodic benefit cost	16	19	48	64
Commonwealth Edison Co [Member]
Other, Net [Abstract]
AFUDC - Equity	10	10	28	23
Non-service net periodic benefit cost	0	0	0	0
PECO Energy Co [Member]
Other, Net [Abstract]
AFUDC - Equity	7	7	22	19
Non-service net periodic benefit cost	0	0	0	0
Baltimore Gas and Electric Company [Member]
Other, Net [Abstract]
AFUDC - Equity	5	7	17	21
Non-service net periodic benefit cost	0	0	0	0
Pepco Holdings LLC [Member]
Other, Net [Abstract]
AFUDC - Equity	16	12	45	36
Non-service net periodic benefit cost	0	0	0	0
Potomac Electric Power Company [Member]
Other, Net [Abstract]
AFUDC - Equity	12	9	35	30
Non-service net periodic benefit cost	0	0	0	0
Delmarva Power and Light Company [Member]
Other, Net [Abstract]
AFUDC - Equity	2	2	5	4
Non-service net periodic benefit cost	0	0	0	0
Atlantic City Electric Company [Member]
Other, Net [Abstract]
AFUDC - Equity	2	1	5	2
Non-service net periodic benefit cost	$ 0	$ 0	$ 0	$ 0

Supplemental Financial Inform_4

Supplemental Financial Information - Taxes Other Than Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Supplemental Statement of Operations Information [Line Items]
Utility taxes	$ 244	$ 215	$ 667	$ 592
Property	99	98	287	271
Payroll	28	33	92	97
Commonwealth Edison Co [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	84	67	233	188
Property	10	13	30	30
Payroll	7	7	21	20
PECO Energy Co [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	51	41	126	107
Property	4	5	12	13
Payroll	5	4	14	12
Baltimore Gas and Electric Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	22	21	70	66
Property	50	46	142	131
Payroll	4	5	13	14
Pepco Holdings LLC [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	87	86	238	231
Property	35	34	103	97
Payroll	7	7	21	21
Potomac Electric Power Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	79	80	216	212
Property	23	23	70	65
Payroll	2	2	5	5
Delmarva Power and Light Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	7	6	19	17
Property	11	10	31	30
Payroll	1	1	4	4
Atlantic City Electric Company [Member]
Supplemental Statement of Operations Information [Line Items]
Utility taxes	1	0	3	2
Property	1	1	2	2
Payroll	$ 0	$ 1	$ 2	$ 2

Supplemental Financial Inform_5

Supplemental Financial Information - Cash Flow (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			$ 2,024	$ 4,505
Amortization of regulatory assets			532	439
Amortization of intangible assets, net			10	44
Amortization of energy contract assets and liabilities			3	23
Nuclear fuel			66	810
ARO accretion			44	383
Depreciation, Amortization and Accretion, Net			2,679	6,204
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			124	304
Allowance for credit losses			130	155
Other decommissioning-related activity			36	(810)
Energy-related options			60	45
True-up adjustments to decoupling mechanisms and formula rates	$ 64	$ (47)	92	129
Restructuring Costs				(67)
Long-term incentive plan			35	94
Amortization of operating ROU asset			47	146
AFUDC - Equity	(38)	(36)	(112)	(99)
Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(92)	(129)
Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(112)	(99)
Commonwealth Edison Co [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			770	721
Amortization of regulatory assets			212	172
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities			0	0
Nuclear fuel			0	0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			982	893
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			45	97
Allowance for credit losses			40	34
Other decommissioning-related activity			0	0
Energy-related options			0	0
True-up adjustments to decoupling mechanisms and formula rates	88	(32)	163	32
Restructuring Costs				1
Long-term incentive plan			0	0
Amortization of operating ROU asset			1	2
AFUDC - Equity	(10)	(10)	(28)	(23)
Commonwealth Edison Co [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(163)	(32)
Commonwealth Edison Co [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(28)	(23)
PECO Energy Co [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			267	249
Amortization of regulatory assets			10	10
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities			0	0
Nuclear fuel			0	0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			277	259
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			(6)	5
Allowance for credit losses			32	36
Other decommissioning-related activity			0	0
Energy-related options			0	0
True-up adjustments to decoupling mechanisms and formula rates	(5)	3	1	20
Restructuring Costs				0
Long-term incentive plan			0	0
Amortization of operating ROU asset			0	0
AFUDC - Equity	(7)	(7)	(22)	(19)
PECO Energy Co [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			(1)	(20)
PECO Energy Co [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(22)	(19)
Baltimore Gas and Electric Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			355	324
Amortization of regulatory assets			115	110
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities			0	0
Nuclear fuel			0	0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			470	434
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			34	45
Allowance for credit losses			18	7
Other decommissioning-related activity			0	0
Energy-related options			0	0
True-up adjustments to decoupling mechanisms and formula rates	(8)	(24)	(40)	(17)
Restructuring Costs				0
Long-term incentive plan			0	0
Amortization of operating ROU asset			14	22
AFUDC - Equity	(5)	(7)	(17)	(21)
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			40	17
Baltimore Gas and Electric Company [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(17)	(21)
Pepco Holdings LLC [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			502	467
Amortization of regulatory assets			195	147
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities			0	0
Nuclear fuel			0	0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			697	614
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			39	36
Allowance for credit losses			42	18
Other decommissioning-related activity			0	0
Energy-related options			0	0
True-up adjustments to decoupling mechanisms and formula rates	(11)	6	(33)	94
Restructuring Costs				1
Long-term incentive plan			0	0
Amortization of operating ROU asset			21	21
AFUDC - Equity	(16)	(12)	(45)	(36)
Pepco Holdings LLC [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			33	(94)
Pepco Holdings LLC [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(45)	(36)
Potomac Electric Power Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			214	204
Amortization of regulatory assets			98	98
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities			0	0
Nuclear fuel			0	0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			312	302
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			6	5
Allowance for credit losses			21	9
Other decommissioning-related activity			0	0
Energy-related options			0	0
True-up adjustments to decoupling mechanisms and formula rates	(8)	9	(15)	54
Restructuring Costs				0
Long-term incentive plan			0	0
Amortization of operating ROU asset			5	5
AFUDC - Equity	(12)	(9)	(35)	(30)
Potomac Electric Power Company [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			15	(54)
Potomac Electric Power Company [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(35)	(30)
Delmarva Power and Light Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			141	126
Amortization of regulatory assets			31	31
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities			0	0
Nuclear fuel			0	0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			172	157
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			3	2
Allowance for credit losses			9	3
Other decommissioning-related activity			0	0
Energy-related options			0	0
True-up adjustments to decoupling mechanisms and formula rates	0	(2)	(3)	17
Restructuring Costs				0
Long-term incentive plan			0	0
Amortization of operating ROU asset			6	7
AFUDC - Equity	(2)	(2)	(5)	(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			3	(17)
Delmarva Power and Light Company [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			(5)	(4)
Atlantic City Electric Company [Member]
Depreciation, Amortization and Accretion [Abstract]
Property, plant and equipment			126	115
Amortization of regulatory assets			66	18
Amortization of intangible assets, net			0	0
Amortization of energy contract assets and liabilities			0	0
Nuclear fuel			0	0
ARO accretion			0	0
Depreciation, Amortization and Accretion, Net			192	133
Other Non-Cash Operating Activities [Abstract]
Pension and non-pension postretirement benefit costs			9	8
Allowance for credit losses			12	6
Other decommissioning-related activity			0	0
Energy-related options			0	0
True-up adjustments to decoupling mechanisms and formula rates	(3)	0	(14)	23
Restructuring Costs				0
Long-term incentive plan			0	0
Amortization of operating ROU asset			3	3
AFUDC - Equity	$ (2)	$ (1)	(5)	(2)
Atlantic City Electric Company [Member] \| Other Non-Cash Activity
Other Non-Cash Operating Activities [Abstract]
True-up adjustments to decoupling mechanisms and formula rates			14	(23)
Atlantic City Electric Company [Member] \| Return on borrowed funds
Other Non-Cash Operating Activities [Abstract]
AFUDC - Equity			$ (5)	$ (2)

Supplemental Financial Inform_6

Supplemental Financial Information - Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 446	$ 672	$ 2,957	$ 432
Restricted cash	744	321	473	349
Restricted cash included in other long-term assets	83	44	54	53
Cash, restricted cash, and cash equivalents - Held for Sale		582		332
Total cash, restricted cash, and cash equivalents	1,273	1,619	3,484	1,166
Accrued Expenses [Abstract]
Compensation-related accruals	501	596
Taxes accrued	317	253
Interest accrued	341	297
Commonwealth Edison Co [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	63	131	241	83
Restricted cash	342	210	276	279
Restricted cash included in other long-term assets	83	43	44	43
Cash, restricted cash, and cash equivalents - Held for Sale		0		0
Total cash, restricted cash, and cash equivalents	488	384	561	405
Accrued Expenses [Abstract]
Compensation-related accruals	152	155
Taxes accrued	115	94
Interest accrued	66	116
PECO Energy Co [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	94	36	344	19
Restricted cash	9	8	8	7
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale		0		0
Total cash, restricted cash, and cash equivalents	103	44	352	26
Accrued Expenses [Abstract]
Compensation-related accruals	63	77
Taxes accrued	41	14
Interest accrued	43	41
Baltimore Gas and Electric Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	20	51	225	144
Restricted cash	130	4	27	1
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale		0		0
Total cash, restricted cash, and cash equivalents	150	55	252	145
Accrued Expenses [Abstract]
Compensation-related accruals	56	78
Taxes accrued	85	53
Interest accrued	44	44
Pepco Holdings LLC [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	219	136	82	111
Restricted cash	234	77	71	39
Restricted cash included in other long-term assets	0	0	9	10
Cash, restricted cash, and cash equivalents - Held for Sale		0		0
Total cash, restricted cash, and cash equivalents	453	213	162	160
Accrued Expenses [Abstract]
Compensation-related accruals	89	113
Taxes accrued	90	96
Interest accrued	73	52
Potomac Electric Power Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	21	34	19	30
Restricted cash	77	34	41	35
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale		0		0
Total cash, restricted cash, and cash equivalents	98	68	60	65
Accrued Expenses [Abstract]
Compensation-related accruals	26	35
Taxes accrued	67	88
Interest accrued	34	28
Delmarva Power and Light Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	49	28	13	15
Restricted cash	157	43	26	0
Restricted cash included in other long-term assets	0	0	0	0
Cash, restricted cash, and cash equivalents - Held for Sale		0		0
Total cash, restricted cash, and cash equivalents	206	71	39	15
Accrued Expenses [Abstract]
Compensation-related accruals	16	20
Taxes accrued	12	9
Interest accrued	21	8
Book Overdrafts	28	4
Atlantic City Electric Company [Member]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	112	29	16	17
Restricted cash	0	0	5	3
Restricted cash included in other long-term assets	0	0	9	10
Cash, restricted cash, and cash equivalents - Held for Sale		0		0
Total cash, restricted cash, and cash equivalents	112	29	$ 30	$ 30
Accrued Expenses [Abstract]
Compensation-related accruals	13	17
Taxes accrued	4	11
Interest accrued	$ 16	$ 11

Related Party Transactions - Ut

Related Party Transactions - Utility Registrants' expense with Generation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Related Party Transaction [Line Items]
Purchased power and/or fuel from affiliates	$ 0	$ (317)	$ (159)	$ (867)
Exelon Generation Co L L C [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	0	94	59	256
Exelon Generation Co L L C [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	0	59	33	142
Exelon Generation Co L L C [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	0	65	18	195
Exelon Generation Co L L C [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	0	99	51	276
Exelon Generation Co L L C [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	0	69	39	199
Exelon Generation Co L L C [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	0	25	10	63
Exelon Generation Co L L C [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	0	5	2	14
Commonwealth Edison Co [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	6	9	14	19
Purchased power and/or fuel from affiliates	$ 0	$ (93)	$ (59)	$ (256)

Related Party Transactions - BS

Related Party Transactions - BSC and PHISCO Service Companies (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	$ 156	$ 106	$ 500	$ 355
PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction Capitalized Costs Support Services	20	18	60	54
Commonwealth Edison Co [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	69	73	236	217
Commonwealth Edison Co [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	69	71	234	214
Related Party Transaction Capitalized Costs Support Services	70	47	222	148
PECO Energy Co [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	46	43	144	126
PECO Energy Co [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	44	41	140	120
Related Party Transaction Capitalized Costs Support Services	24	12	80	57
Baltimore Gas and Electric Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	50	46	152	137
Baltimore Gas and Electric Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	46	45	148	133
Related Party Transaction Capitalized Costs Support Services	26	20	86	62
Pepco Holdings LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	40	43	138	122
Pepco Holdings LLC [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	39	40	135	116
Related Party Transaction Capitalized Costs Support Services	36	27	112	88
Pepco Holdings LLC [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	0	0	0
Related Party Transaction Capitalized Costs Support Services	20	18	60	54
Potomac Electric Power Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	52	52	166	155
Potomac Electric Power Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	24	23	80	68
Related Party Transaction Capitalized Costs Support Services	13	11	41	36
Potomac Electric Power Company [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	28	26	86	84
Related Party Transaction Capitalized Costs Support Services	8	7	24	22
Delmarva Power and Light Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	39	40	124	117
Delmarva Power and Light Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	16	14	51	43
Related Party Transaction Capitalized Costs Support Services	11	10	34	29
Delmarva Power and Light Company [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	24	24	73	73
Related Party Transaction Capitalized Costs Support Services	7	6	20	17
Atlantic City Electric Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	33	35	106	103
Atlantic City Electric Company [Member] \| Exelon Business Services Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	13	14	42	37
Related Party Transaction Capitalized Costs Support Services	12	7	37	22
Atlantic City Electric Company [Member] \| PHI Service Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	20	21	63	64
Related Party Transaction Capitalized Costs Support Services	$ 5	$ 5	$ 16	$ 15

Related Party Transactions - Cu

Related Party Transactions - Current Receivables From/Payables To Affiliates (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	$ 222	$ 523
Accounts Payable, Related Parties, Current	5	5
Commonwealth Edison Co [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	54	121
Accounts Receivable, Related Parties, Current	3	16
Commonwealth Edison Co [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		13
Commonwealth Edison Co [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	54	121
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
PECO Energy Co [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	36	70
Accounts Receivable, Related Parties, Current	1	1
PECO Energy Co [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		0
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] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	36	70
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	1
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	0
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	0
PECO Energy Co [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	1	0
Baltimore Gas and Electric Company [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	32	48
Accounts Receivable, Related Parties, Current	0	1
Baltimore Gas and Electric Company [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		0
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] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	32	48
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	1
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
Pepco Holdings LLC [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	54	104
Accounts Receivable, Related Parties, Current	1	2
Pepco Holdings LLC [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	14	16
Potomac Electric Power Company [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	28	59
Accounts Receivable, Related Parties, Current	0	0
Potomac Electric Power Company [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		0
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] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	28	59
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
Delmarva Power and Light Company [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	24	33
Accounts Receivable, Related Parties, Current	0	1
Delmarva Power and Light Company [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		0
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] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	24	33
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	1
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
Atlantic City Electric Company [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	20	31
Accounts Receivable, Related Parties, Current	1	2
Atlantic City Electric Company [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		0
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] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	20	31
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	1
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	1
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	1	0
Business Services Company [Member]
Related Party Transaction [Line Items]
Accounts Receivable, Related Parties, Current	161	306
Business Services Company [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		102
Business Services Company [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	50	71
Business Services Company [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	30	36
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	31	41
Business Services Company [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	4	5
Business Services Company [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	14	21
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	13	17
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	13
Business Services Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	9	0
PHI Service Company [Member]
Related Party Transaction [Line Items]
Accounts Receivable, Related Parties, Current	32	32
PHI Service Company [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		0
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	13	12
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	10	11
PHI Service Company [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	9	9
PHI Service Company [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	0	0
Other Legal Entities [Member]
Related Party Transaction [Line Items]
Accounts Receivable, Related Parties, Current	24	47
Other Legal Entities [Member] \| Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		16
Other Legal Entities [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	4	9
Other Legal Entities [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	14	14
Other Legal Entities [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	6	4
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	1	3
Other Legal Entities [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	10	9
Other Legal Entities [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current	1	3
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	1
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	2
Exelon Generation Co LLC Affiliate [Member]
Related Party Transaction [Line Items]
Accounts Receivable, Related Parties, Current		117
Exelon Generation Co LLC Affiliate [Member] \| Commonwealth Edison Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		41
Exelon Generation Co LLC Affiliate [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current		131
Exelon Generation Co LLC Affiliate [Member] \| PECO Energy Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		30
Exelon Generation Co LLC Affiliate [Member] \| Baltimore Gas And Electric Company Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		4
Exelon Generation Co LLC Affiliate [Member] \| Pepco Holdings LLC Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		0
Exelon Generation Co LLC Affiliate [Member] \| Potomac Electric Power Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		20
Exelon Generation Co LLC Affiliate [Member] \| Delmarva Power and Light Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		4
Exelon Generation Co LLC Affiliate [Member] \| Atlantic City Electric Co Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		7
Exelon Generation Co LLC Affiliate [Member] \| Other Affiliate [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Due from (to) Related Party, Current		$ 11

Related Party Transactions - Lo

Related Party Transactions - Long Term Debt to Financing Trusts (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Long-term debt to financing trust	$ 390	$ 390
ComEd Financing Three Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	206	206
PECO Trust Three Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	81	81
PECO Trust Four Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	103	103
Commonwealth Edison Co [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	205	205
Commonwealth Edison Co [Member] \| ComEd Financing Three Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	205	205
Commonwealth Edison Co [Member] \| PECO Trust Three Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	0	0
Commonwealth Edison Co [Member] \| PECO Trust Four Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	0	0
PECO Energy Co [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	184	184
PECO Energy Co [Member] \| ComEd Financing Three Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	0	0
PECO Energy Co [Member] \| PECO Trust Three Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	81	81
PECO Energy Co [Member] \| PECO Trust Four Affiliate [Member]
Related Party Transaction [Line Items]
Long-term debt to financing trust	$ 103	$ 103