0001109357-26-000095 | 10-Q | XBRL Viewer

Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 20, 2026	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Derivative [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (733)		$ (733)		$ (762)
Corporate, Non-Segment \| Notes Payable to Banks
Derivative [Line Items]
Derivative, Notional Amount	$ 775
Derivative, cash received on hedge	6
PECO Energy Co
Derivative [Line Items]
Incremental collateral for loss of investment grade credit rating		26		26
Baltimore Gas and Electric Company
Derivative [Line Items]
Incremental collateral for loss of investment grade credit rating		14		14
Delmarva Power and Light Company
Derivative [Line Items]
Incremental collateral for loss of investment grade credit rating		10		10
InterestRateSwapNotionalTerminated \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount	550
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (4)
InterestRateSwapNotional5YR \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		$ 60		60		335
Derivative, term of contract		5 years
InterestRateSwapNotional10YR \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		$ 240		240		365
Derivative, term of contract		10 years
InterestRateSwapNotional10YR \| Cash Flow Hedging \| Corporate, Non-Segment
Derivative [Line Items]
Derivative, Notional Amount		$ 90		90
Interest Rate Swap \| Cash Flow Hedging
Derivative [Line Items]
Derivative, Notional Amount		300		300		$ 700
Derivative, Gain (Loss) on Derivative, Net		11	$ 1	13	$ 14
Derivative, Gain (Loss) on Derivative, Net		$ 11	$ 1	$ 13	$ 14

Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2026

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,
	2026		2025		2026		2025		2026		2025		2026		2025
Exelon
BSC									$	132	$	156	$	383	$	478
PHISCO									19		29		71		83
ComEd
BSC	$	104	$	95	$	316	$	296	54		63		166		186
PECO
BSC	55		58		188		178		28		24		69		79
BGE
BSC	56		60		193		185		21		28		62		92
PHI
BSC	38		44		154		144		29		41		87		121
PHISCO	—		—		—		—		19		29		71		83
Pepco
BSC	32		30		104		93		10		18		35		52
PHISCO	27		29		94		91		5		14		27		36

DPL
BSC	20		19		65		58		9		12		27		36
PHISCO	22		24		73		75		8		8		23		25

ACE
BSC	16		15		52		47		10		10		23		28
PHISCO	16		22		67		69		7		7		21		22

Current Receivables From/Payables To Affiliates

The following tables present Receivables from affiliates and Payables to affiliates:

September 30, 2026


				Receivables from affiliates:
	Payables to affiliates:			ComEd			PECO			BGE			Pepco			DPL			ACE			BSC			PHISCO			Other			Total
ComEd					$	—		$	—		$	—		$	—		$	—		$	65		$	—		$	3		$	68
PECO		$	—					—			—			—			—			30			—			5			35
BGE		—			—						—			—			—			33			—			2			35
PHI(a)		—			—			—			—			—			—			6			—			5			11
Pepco		—			—			—						—			—			19			13			2			34
DPL		—			—			—			—						—			12			9			2			23
ACE		—			—			—			—			—						9			8			1			18


Other		5			1			—			—			6			1			—			—						13
Total		$	5		$	1		$	—		$	—		$	6		$	1		$	174		$	30		$	20		$	237

December 31, 2025


				Receivables from affiliates:
	Payables to affiliates:			ComEd			PECO			BGE			Pepco			DPL			ACE			BSC			PHISCO			Other			Total
ComEd					$	—		$	—		$	—		$	—		$	—		$	76		$	—		$	5		$	81
PECO		$	—					—			—			—			—			33			—			2			35
BGE		—			—						—			—			—			39			—			—			39
PHI(a)		—			—			—			—			—			—			5			2			11			18
Pepco		—			—			—						—			—			25			11			1			37
DPL		—			—			—			—						—			15			10			—			25
ACE		—			—			—			—			—						14			10			—			24
Other		5			—			1			—			2			12			—			—						20
Total		$	5		$	—		$	1		$	—		$	2		$	12		$	207		$	33		$	19		$	279

__________

(a)PHI is presented exclusive of Pepco, DPL, and ACE, which are included in the table herein.

Long Term Debt to Financing Trusts

The following table presents Long-term debt to financing trusts:


	September 30, 2026						December 31, 2025
	Exelon		ComEd		PECO		Exelon		ComEd		PECO
ComEd Financing III	$	206	$	206	$	—	$	206	$	206	$	—
PECO Trust III	81		—		81		81		—		81
PECO Trust IV	103		—		103		103		—		103
Total	$	390	$	206	$	184	$	390	$	206	$	184

Fair Value of Financial Assets and Liabilities - Fair Value Measurements of Assets and Liabilities, Recurring and Nonrecurring (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities	$ 21	$ 30
Mark-to-market derivative liabilities (noncurrent liabilities)	96	106
Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1,718	825
Assets, Fair Value Disclosure	2,028	1,106
Deferred Compensation Liability, Current and Noncurrent	(67)	(71)
Total liabilities	184	206
Fair Value, Net Asset (Liability)	1,844	900
Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(117)	(131)
Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	(4)
Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	(4)
Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	293	278
Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	110	101
Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	78	71
Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	6	6
Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	99	100
Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	17	3
Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	17	3
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	1,718	825
Assets, Fair Value Disclosure	1,906	997
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	1,906	997
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	188	172
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	110	101
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	78	71
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	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	103	88
Deferred Compensation Liability, Current and Noncurrent	(67)	(71)
Total liabilities	67	75
Fair Value, Net Asset (Liability)	36	13
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	(4)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	(4)
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	86	85
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	6	6
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	80	79
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	17	3
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	17	3
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	19	21
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	117	131
Fair Value, Net Asset (Liability)	(98)	(110)
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mark-to-Market Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	(117)	(131)
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Derivatives Designated as Hedging Instruments Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Liabilities
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total mark-to-market derivative liabilities	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	19	21
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	19	21
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Designated as Hedging Instrument [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Interest Rate Derivative Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total derivative assets	0	0
Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Commonwealth Edison Co
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Mark-to-market derivative liabilities	21	25
Mark-to-market derivative liabilities (noncurrent liabilities)	96	106
Commonwealth Edison Co \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	573	393
Total derivative assets	0
Assets, Fair Value Disclosure	573	393
Total mark-to-market derivative liabilities	(117)	(131)
Deferred Compensation Liability, Current and Noncurrent	(10)	(9)
Total liabilities	127	140
Fair Value, Net Asset (Liability)	446	253
Mark-to-market derivative liabilities	21	25
Mark-to-market derivative liabilities (noncurrent liabilities)	96	106
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	573	393
Assets, Fair Value Disclosure	573	393
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)	573	393
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(10)	(9)
Total liabilities	10	9
Fair Value, Net Asset (Liability)	(10)	(9)
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	(117)	(131)
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	117	131
Fair Value, Net Asset (Liability)	(117)	(131)
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Commonwealth Edison Co \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
PECO Energy Co \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	81	93
Assets, Fair Value Disclosure	122	131
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(7)	(8)
Total liabilities	7	8
Fair Value, Net Asset (Liability)	115	123
PECO Energy Co \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	41	38
PECO Energy Co \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	3
PECO Energy Co \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	14	13
PECO Energy Co \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	24	25
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	81	93
Assets, Fair Value Disclosure	98	106
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)	98	106
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	17	13
PECO Energy Co \| 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	3
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	14	13
PECO Energy Co \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	24	25
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(7)	(8)
Total liabilities	7	8
Fair Value, Net Asset (Liability)	17	17
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	24	25
PECO Energy Co \| 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
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	24	25
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
PECO Energy Co \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	834	205
Assets, Fair Value Disclosure	850	215
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(4)	(4)
Total liabilities	4	4
Fair Value, Net Asset (Liability)	846	211
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	16	10
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	16	10
Baltimore Gas and Electric Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	834	205
Assets, Fair Value Disclosure	850	215
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)	850	215
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	16	10
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	16	10
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	(4)	(4)
Total liabilities	4	4
Fair Value, Net Asset (Liability)	(4)	(4)
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Total mark-to-market derivative liabilities	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Baltimore Gas and Electric Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Pepco Holdings LLC \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	205	83
Assets, Fair Value Disclosure	365	240
Deferred Compensation Liability, Current and Noncurrent	(8)	(9)
Total liabilities	8	9
Fair Value, Net Asset (Liability)	357	231
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	160	157
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	103	99
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	8	9
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	6	6
Pepco Holdings LLC \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	43	43
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	205	83
Assets, Fair Value Disclosure	316	191
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	316	191
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	111	108
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	103	99
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	8	9
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	29	29
Deferred Compensation Liability, Current and Noncurrent	(8)	(9)
Total liabilities	8	9
Fair Value, Net Asset (Liability)	21	20
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	29	29
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	6	6
Pepco Holdings LLC \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	23	23
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	20	20
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	20	20
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	20	20
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Mutual Funds [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Fixed Income Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Pepco Holdings LLC \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	20	20
Pepco Holdings LLC \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Potomac Electric Power Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	102	33
Assets, Fair Value Disclosure	247	174
Deferred Compensation Liability, Current and Noncurrent	(1)	(1)
Total liabilities	1	1
Fair Value, Net Asset (Liability)	246	173
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	145	141
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	103	98
Potomac Electric Power Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	42	43
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	102	33
Assets, Fair Value Disclosure	205	131
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	205	131
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	103	98
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	103	98
Potomac Electric Power Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	23	23
Deferred Compensation Liability, Current and Noncurrent	(1)	(1)
Total liabilities	1	1
Fair Value, Net Asset (Liability)	22	22
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	23	23
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Potomac Electric Power Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	23	23
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	19	20
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	19	20
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	19	20
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Potomac Electric Power Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	19	20
Potomac Electric Power Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Delmarva Power and Light Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	74	3
Assets, Fair Value Disclosure	74	3
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	74	3
Delmarva Power and Light Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	74	3
Assets, Fair Value Disclosure	74	3
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	74	3
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Delmarva Power and Light Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	0	0
Atlantic City Electric Company \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Atlantic City Electric Company \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Deferred Compensation Liability, Current and Noncurrent	0	0
Total liabilities	0	0
Fair Value, Net Asset (Liability)	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Rabbi Trust Investments [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Cash Equivalents [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| 6311 Life Insurance [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Investments, Fair Value Disclosure	0	0
Atlantic City Electric Company \| Fair Value Measured at Net Asset Value Per Share [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, Fair Value Disclosure	0	0
Total liabilities	$ 0	$ 0

Accounts Receivable (All Registrants)

9 Months Ended

Sep. 30, 2026

Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]

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, 2026
	Exelon		ComEd(b)(c)		PECO		BGE(d)		PHI		Pepco(e)		DPL		ACE(e)(f)
Balance at June 30, 2026	$	508	$	102	$	142	$	136	$	128	$	77	$	21	$	30
Plus: Current period provision for expected credit losses	71		22		21		2		26		16		4		6
Less: Write-offs, net of recoveries(a)	72		19		28		7		18		9		4		5
Balance at September 30, 2026	$	507	$	105	$	135	$	131	$	136	$	84	$	21	$	31

	Three Months Ended September 30, 2025
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Balance at June 30, 2025	$	465	$	122	$	154	$	66	$	123	$	69	$	21	$	33
Plus: Current period provision for expected credit losses	82		37		22		8		15		11		3		1
Less: Write-offs, net of recoveries	96		44		31		6		15		8		4		3
Balance at September 30, 2025	$	451	$	115	$	145	$	68	$	123	$	72	$	20	$	31

_________

(a)Recoveries were not material to the Registrants.

(b)For ComEd, the decrease in current period provision for expected credit losses when comparing to three months ended September 30, 2025, is primarily the result of decreased aging of receivables.

(c)For ComEd, the decrease in write-offs, net of recoveries when comparing to three months ended September 30, 2025, is primarily the result of decreased disconnection activities.

(d)For BGE, the decrease in current period provision for expected credit losses when comparing to three months ended September 30, 2025, is primarily the result of increased collection activities.

(e)For Pepco and ACE, the increase in current period provision for expected credit losses when comparing to three months ended September 30, 2025, is primarily the result of increased receivable balances.

(f)For ACE, the increase in write-offs, net of recoveries when comparing to three months ended September 30, 2025, is primarily the result of unfavorable customer behavior.


	Nine Months Ended September 30, 2026
	Exelon		ComEd(b)		PECO(c)(d)(e)		BGE(f)(g)		PHI		Pepco(f)(h)		DPL(i)		ACE(f)(h)
Balance at December 31, 2025	$	435	$	115	$	137	$	68	$	115	$	69	$	19	$	27
Plus: Current period provision for expected credit losses	265		49		59		90		67		41		11		15
Less: Write-offs, net of recoveries(a)	193		59		61		27		46		26		9		11
Balance at September 30, 2026	$	507	$	105	$	135	$	131	$	136	$	84	$	21	$	31

	Nine Months Ended September 30, 2025
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Balance at December 31, 2024	$	406	$	109	$	133	$	56	$	108	$	59	$	17	$	32
Plus: Current period provision for expected credit losses	224		66		68		34		56		35		13		8
Less: Write-offs, net of recoveries	179		60		56		22		41		22		10		9
Balance at September 30, 2025	$	451	$	115	$	145	$	68	$	123	$	72	$	20	$	31

_________

(a)Recoveries were not material to ComEd, BGE, Pepco, DPL, or ACE.

(b)For ComEd, the decrease in current period provision for expected credit losses when comparing to nine months ended September 30, 2025, is primarily the result of decreased aging of receivables.

(c)For PECO, the decrease in current period provision for expected credit losses when comparing to nine months ended September 30, 2025, is primarily the result of decreased receivable balances.

(d)For PECO, the increase in write-offs, net of recoveries when comparing to nine months ended September 30, 2025, is primarily the result of increased disconnection activities.

(e)For PECO, the increase in recoveries collected when comparing to nine months ended September 30, 2025, is primarily the result of increased customer repayments.

(f)For BGE, Pepco, and ACE, the increase in current period provision for expected credit losses when comparing to nine months ended September 30, 2025, is primarily the result of increased receivable balances.

(g)For BGE, the increase in write-offs, net of recoveries when comparing to nine months ended September 30, 2025, is primarily the result of increased receivable balances associated with increased customer billings.

(h)For Pepco and ACE the increase in write-offs, net of recoveries when comparing to nine months ended September 30, 2025, is primarily the result of unfavorable customer behavior.

(i)For DPL, the decrease in current period provision for expected credit losses when comparing to nine months ended September 30, 2025, is primarily the result of favorable customer behavior.

The following tables present the rollforward of Allowance for Credit Losses on Other Accounts Receivable.



	Three Months Ended September 30, 2026
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE(b)
Balance at June 30, 2026	$	94	$	25	$	18	$	3	$	48	$	25	$	11	$	12
Plus: Current period provision for expected credit losses	15		6		3		1		5		1		1		3
Less: Write-offs, net of recoveries(a)	13		5		5		1		2		—		1		1
Balance at September 30, 2026	$	96	$	26	$	16	$	3	$	51	$	26	$	11	$	14

	Three Months Ended September 30, 2025
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Balance at June 30, 2025	$	107	$	31	$	19	$	5	$	52	$	28	$	9	$	15
Plus: Current period provision (benefit) for expected credit losses	7		5		2		1		(1)		—		—		(1)
Less: Write-offs, net of recoveries	16		11		4		1		—		—		—		—
Balance at September 30, 2025	$	98	$	25	$	17	$	5	$	51	$	28	$	9	$	14

_________

(a)Recoveries were not material to the Registrants.

(b)For ACE, the increase in current period provision for expected credit losses when comparing to three months ended September 30, 2025, is primarily the result of increased receivable balances.


	Nine Months Ended September 30, 2026
	Exelon		ComEd(b)		PECO		BGE		PHI		Pepco		DPL(b)(c)		ACE(b)
Balance at December 31, 2025	$	94	$	23	$	18	$	4	$	49	$	26	$	10	$	13
Plus: Current period provision for expected credit losses	32		14		6		3		9		1		3		5
Less: Write-offs, net of recoveries(a)	30		11		8		4		7		1		2		4
Balance at September 30, 2026	$	96	$	26	$	16	$	3	$	51	$	26	$	11	$	14

	Nine Months Ended September 30, 2025
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Balance at December 31, 2024	$	107	$	34	$	18	$	6	$	49	$	27	$	9	$	13
Plus: Current period provision (benefit) for expected credit losses	15		4		9		(1)		3		1		—		2
Less: Write-offs, net of recoveries	24		13		10		—		1		—		—		1
Balance at September 30, 2025	$	98	$	25	$	17	$	5	$	51	$	28	$	9	$	14

_________

(a)Recoveries were not material to the Registrants.

(b)For ComEd, DPL, and ACE, the increase in current period provision for expected credit losses when comparing to nine months ended September 30, 2025, is primarily the result of increased receivable balances.

(c)For DPL, the increase in write-offs, net of recoveries when comparing to nine months ended September 30, 2025, is primarily the result of unfavorable customer behavior.

Unbilled Customer Revenue

The following table provides additional information about unbilled customer revenues recorded in the Registrants' Consolidated Balance Sheets as of September 30, 2026 and December 31, 2025.


	Unbilled customer revenues(a)
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
September 30, 2026	$	887	$	313	$	160	$	180	$	234	$	122	$	59	$	53
December 31, 2025	1,231		301		278		325		327		155		100		72

__________

(a)Unbilled customer revenues are classified in Customer accounts receivable, net in the Registrants' Consolidated Balance Sheets.

Other Purchases of Customer and Other Accounts Receivables

For the nine months ended September 30, 2026 and 2025, the Utility Registrants were 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 participated in the utilities' consolidated billing. The following table presents the total receivables purchased.


	Total receivables purchased
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Nine months ended September 30, 2026	$	3,708	$	967	$	1,091	$	492	$	1,158	$	745	$	209	$	204
Nine months ended September 30, 2025	3,320		814		954		550		1,002		624		201		177

Derivative Financial Instruments - Summary of Notional Amounts of Outstanding Derivative Positions (Details) - Cash Flow Hedging - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
InterestRateSwapNotional5YR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 60	$ 335
InterestRateSwapNotional10YR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	240	365
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 300	$ 700

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Income Taxes - Allocation of Tax Benefits (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2025
Atlantic City Electric Company
Income Tax Contingency [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	$ 3	$ 4
Pepco Holdings LLC
Income Tax Contingency [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	21	23
Commonwealth Edison Co
Income Tax Contingency [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	125	20
PECO Energy Co
Income Tax Contingency [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	27	14
Baltimore Gas and Electric Company
Income Tax Contingency [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	(3)	12
Potomac Electric Power Company
Income Tax Contingency [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	8	12
Delmarva Power and Light Company
Income Tax Contingency [Line Items]
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement	$ 9	$ 7

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - ACE - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Operating revenues
Revenues from alternative revenue programs	$ (35)	$ (220)	$ (138)	$ (621)
Total operating revenues	7,319	6,705	20,528	18,846
Operating expenses
Operating and maintenance	1,564	1,172	4,416	3,840
Depreciation and amortization	991	912	2,910	2,717
Taxes other than income taxes	468	429	1,335	1,216
Total operating expenses	5,940	5,205	16,565	14,884
Operating income	1,379	1,500	3,963	3,963
Other income and (deductions)
Interest expense, net	(587)	(531)	(1,702)	(1,560)
Other, net	97	68	256	185
Total other income and (deductions)	(496)	(470)	(1,465)	(1,393)
Income before income taxes	883	1,030	2,498	2,570
Income taxes	154	155	454	396
Net income	729	875	2,044	2,174
Related Party
Other income and (deductions)
Interest expense to affiliates, net	(6)	(7)	(19)	(18)
Atlantic City Electric Company
Operating revenues
Revenues from alternative revenue programs	(1)	16	(30)	2
Total operating revenues	579	570	1,402	1,328
Operating expenses
Operating and maintenance	61	55	166	161
Depreciation and amortization	67	61	195	188
Taxes other than income taxes	2	2	8	7
Total operating expenses	437	441	1,156	1,088
Operating income	142	129	246	240
Other income and (deductions)
Interest expense, net	(23)	(20)	(67)	(62)
Other, net	3	2	8	8
Total other income and (deductions)	(20)	(18)	(59)	(54)
Income before income taxes	122	111	187	186
Income taxes	32	29	48	48
Net income	90	82	139	138
Comprehensive income	90	82	139	138
Atlantic City Electric Company \| Related Party
Operating revenues
Operating revenues from affiliates	1	1	4	3
Operating expenses
Operating and maintenance from affiliates	31	37	119	116
Electricity, US Regulated
Operating revenues
Operating revenues	7,103	6,690	18,971	17,872
Operating expenses
Purchased power and/or fuel	2,865	2,645	7,380	6,640
Electricity, US Regulated \| Atlantic City Electric Company
Operating revenues
Operating revenues	579	553	1,428	1,323
Operating expenses
Purchased power and/or fuel	276	286	668	616
Natural Gas, US Regulated
Operating revenues
Operating revenues	251	235	1,695	1,595
Operating expenses
Purchased power and/or fuel	$ 52	$ 47	$ 524	$ 471

Statements of Operations and Comprehensive Income (Unaudited) - DPL - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Operating revenues
Revenues from alternative revenue programs	$ (35)	$ (220)	$ (138)	$ (621)
Total operating revenues	7,319	6,705	20,528	18,846
Operating expenses
Operating and maintenance	1,564	1,172	4,416	3,840
Depreciation and amortization	991	912	2,910	2,717
Taxes other than income taxes	468	429	1,335	1,216
Total operating expenses	5,940	5,205	16,565	14,884
Operating income	1,379	1,500	3,963	3,963
Other income and (deductions)
Interest expense, net	(587)	(531)	(1,702)	(1,560)
Other, net	97	68	256	185
Total other income and (deductions)	(496)	(470)	(1,465)	(1,393)
Income before income taxes	883	1,030	2,498	2,570
Income taxes	154	155	454	396
Net income	729	875	2,044	2,174
Related Party
Other income and (deductions)
Interest expense to affiliates, net	(6)	(7)	(19)	(18)
Delmarva Power and Light Company
Operating revenues
Revenues from alternative revenue programs	(3)	(5)	(8)	(10)
Total operating revenues	556	491	1,632	1,460
Operating expenses
Operating and maintenance	66	51	200	162
Depreciation and amortization	67	63	200	189
Taxes other than income taxes	16	21	66	63
Total operating expenses	455	397	1,352	1,185
Operating income	101	94	280	275
Other income and (deductions)
Interest expense, net	(28)	(26)	(81)	(75)
Other, net	7	4	14	12
Total other income and (deductions)	(21)	(22)	(67)	(63)
Income before income taxes	80	72	213	212
Income taxes	19	17	49	49
Net income	61	55	164	163
Comprehensive income	61	55	164	163
Delmarva Power and Light Company \| Related Party
Operating revenues
Operating revenues from affiliates	3	2	7	6
Operating expenses
Operating and maintenance from affiliates	42	43	139	134
Electricity, US Regulated
Operating revenues
Electric and natural gas operating revenues	7,103	6,690	18,971	17,872
Operating expenses
Purchased power and/or fuel	2,865	2,645	7,380	6,640
Electricity, US Regulated \| Delmarva Power and Light Company
Operating revenues
Electric and natural gas operating revenues	516	467	1,436	1,316
Operating expenses
Purchased power and/or fuel	245	211	655	580
Natural Gas, US Regulated
Operating revenues
Electric and natural gas operating revenues	251	235	1,695	1,595
Operating expenses
Purchased power and/or fuel	52	47	524	471
Natural Gas, US Regulated \| Delmarva Power and Light Company
Operating revenues
Electric and natural gas operating revenues	40	27	197	148
Operating expenses
Purchased power and/or fuel	$ 19	$ 8	$ 92	$ 57

Debt and Credit Agreements (All Registrants) - Summary of Revolving Credit Agreements (Details) - Revolving Credit Facility $ in Millions	9 Months Ended
	Sep. 30, 2026 USD ($)
Commonwealth Edison Co
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,000
Debt instrument, interest rate terms	1.00%
PECO Energy Co
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600
Debt instrument, interest rate terms	1.00%
Baltimore Gas and Electric Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600
Debt instrument, interest rate terms	1.00%
Potomac Electric Power Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Debt instrument, interest rate terms	1.00%
Delmarva Power and Light Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Debt instrument, interest rate terms	1.00%
Atlantic City Electric Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Debt instrument, interest rate terms	1.00%
Corporate, Non-Segment
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 900
Debt instrument, interest rate terms	1.075%

Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2026

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, 2026
	Exelon		ComEd(b)(c)		PECO		BGE(d)		PHI		Pepco(e)		DPL		ACE(e)(f)
Balance at June 30, 2026	$	508	$	102	$	142	$	136	$	128	$	77	$	21	$	30
Plus: Current period provision for expected credit losses	71		22		21		2		26		16		4		6
Less: Write-offs, net of recoveries(a)	72		19		28		7		18		9		4		5
Balance at September 30, 2026	$	507	$	105	$	135	$	131	$	136	$	84	$	21	$	31

	Three Months Ended September 30, 2025
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Balance at June 30, 2025	$	465	$	122	$	154	$	66	$	123	$	69	$	21	$	33
Plus: Current period provision for expected credit losses	82		37		22		8		15		11		3		1
Less: Write-offs, net of recoveries	96		44		31		6		15		8		4		3
Balance at September 30, 2025	$	451	$	115	$	145	$	68	$	123	$	72	$	20	$	31

_________

(a)Recoveries were not material to the Registrants.

(b)For ComEd, the decrease in current period provision for expected credit losses when comparing to three months ended September 30, 2025, is primarily the result of decreased aging of receivables.

(c)For ComEd, the decrease in write-offs, net of recoveries when comparing to three months ended September 30, 2025, is primarily the result of decreased disconnection activities.

(d)For BGE, the decrease in current period provision for expected credit losses when comparing to three months ended September 30, 2025, is primarily the result of increased collection activities.

(f)For ACE, the increase in write-offs, net of recoveries when comparing to three months ended September 30, 2025, is primarily the result of unfavorable customer behavior.


	Nine Months Ended September 30, 2026
	Exelon		ComEd(b)		PECO(c)(d)(e)		BGE(f)(g)		PHI		Pepco(f)(h)		DPL(i)		ACE(f)(h)
Balance at December 31, 2025	$	435	$	115	$	137	$	68	$	115	$	69	$	19	$	27
Plus: Current period provision for expected credit losses	265		49		59		90		67		41		11		15
Less: Write-offs, net of recoveries(a)	193		59		61		27		46		26		9		11
Balance at September 30, 2026	$	507	$	105	$	135	$	131	$	136	$	84	$	21	$	31

	Nine Months Ended September 30, 2025
	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Balance at December 31, 2024	$	406	$	109	$	133	$	56	$	108	$	59	$	17	$	32
Plus: Current period provision for expected credit losses	224		66		68		34		56		35		13		8
Less: Write-offs, net of recoveries	179		60		56		22		41		22		10		9
Balance at September 30, 2025	$	451	$	115	$	145	$	68	$	123	$	72	$	20	$	31