Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2022

Asset Retirement Obligation Disclosure [Abstract]

The following table provides a rollforward of the AROs reflected in the Registrants’ Consolidated Balance Sheets from December 31, 2020 to December 31, 2022:


	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
AROs as of December 31, 2020	$	249	$	129	$	29	$	23	$	59	$	39	$	14	$	6
Net increase due to changes in, and timing of, estimated future cash flows	26		15		—		2		10		5		2		3

Accretion expense(a)	7		4		1		1		1		1		—		—

Payments	(8)		(2)		(1)		—		—		—		—		—
AROs as of December 31, 2021	274		146		29		26		70		45		16		9
Net (decrease) increase due to changes in, and timing of, estimated future cash flows	(8)		2		(1)		3		(13)		(8)		(3)		(2)

Accretion expense(a)	8		4		1		1		2		2		—		—

Payments	(3)		(2)		(1)		—		—		—		—		—
AROs as of December 31, 2022	$	271	$	150	$	28	$	30	$	59	$	39	$	13	$	7

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(a)For ComEd, PECO, BGE, PHI, DPL and ACE, the majority of the accretion is recorded as an increase to a regulatory asset due to the associated regulatory treatment.