Consolidated Statements of Changes in Equity - PHI - USD ($) $ in Millions	Total	Retained Earnings	Pepco Holdings LLC	Pepco Holdings LLC Membership Interest	Pepco Holdings LLC Retained Earnings
Beginning Balance at Dec. 31, 2020			$ 10,044	$ 10,112	$ (68)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,829	$ 1,706	561		561
Distribution to member			(703)		(703)
Contributions from member			683	683
Ending Balance at Dec. 31, 2021			10,585	10,795	(210)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,171	2,170	608		608
Distribution to member			(750)		(750)
Contributions from member			787	787
Ending Balance at Dec. 31, 2022			11,230	11,582	(352)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 2,328	$ 2,328	590		590
Distribution to member			(513)		(513)
Contributions from member			475	475
Ending Balance at Dec. 31, 2023			$ 11,782	$ 12,057	$ (275)