Statement of Changes in Shareholders Equity - Pepco - USD ($) $ in Millions	Total	Retained Earnings	Potomac Electric Power Company	Potomac Electric Power Company Common Stock	Potomac Electric Power Company Retained Earnings
Beginning Balance at Dec. 31, 2020			$ 3,203	$ 2,058	$ 1,145
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,829	$ 1,706	296		296
Common stock dividends	(1,499)	(1,499)	(268)		(268)
Contributions from parent			244	244
Ending Balance at Dec. 31, 2021			3,475	2,302	1,173
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,171	2,170	305		305
Common stock dividends	(1,336)	(1,336)	(463)		(463)
Contributions from parent			465	465
Ending Balance at Dec. 31, 2022	24,744		3,782	2,767	1,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,328	2,328	306		306
Common stock dividends	(1,435)	$ (1,435)	(252)		(252)
Contributions from parent			308	308
Ending Balance at Dec. 31, 2023	$ 25,755		$ 4,144	$ 3,075	$ 1,069