Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2021

Asset Retirement Obligation Disclosure [Abstract]

The following table provides a rollforward of the AROs reflected in the Registrants’ Consolidated Balance Sheets from December 31, 2019 to December 31, 2021:


	Exelon		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
AROs as of December 31, 2019	$	244	$	129	$	28	$	23	$	57	$	41	$	12	$	4
Net increase (decrease) due to changes in, and timing of, estimated future cash flows	5		—		2		1		1		(3)		2		2

Accretion expense(a)	5		1		1		1		1		1		—		—

Payments	(5)		(1)		(2)		(2)		—		—		—		—
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

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