Statements of Changes in Shareholders Equity (Unaudited) - DPL - USD ($) $ in Millions	Total	Retained Earnings	Delmarva Power and Light Company	Delmarva Power and Light Company Common Stock	Delmarva Power and Light Company Retained Earnings
Beginning Balance at Dec. 31, 2021			$ 1,777	$ 1,209	$ 568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 598	$ 597	56		56
Common stock dividends	(332)	(332)	(41)		(41)
Contributions from parent			144	144
Ending Balance at Mar. 31, 2022			1,936	1,353	583
Beginning Balance at Dec. 31, 2021			1,777	1,209	568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,739		130
Ending Balance at Sep. 30, 2022			1,958	1,356	602
Beginning Balance at Mar. 31, 2022			1,936	1,353	583
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	465	465	21		21
Common stock dividends	(332)	(332)	(15)		(15)
Ending Balance at Jun. 30, 2022			1,942	1,353	589
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	676	676	52		52
Common stock dividends	(335)	(335)	(39)		(39)
Contributions from parent			3	3
Ending Balance at Sep. 30, 2022			1,958	1,356	602
Beginning Balance at Dec. 31, 2022	24,744		1,950	1,356	594
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	669	669	60		60
Common stock dividends	(359)	(359)	(42)		(42)
Contributions from parent			99	99
Ending Balance at Mar. 31, 2023			2,067	1,455	612
Beginning Balance at Dec. 31, 2022	24,744		1,950	1,356	594
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		128
Ending Balance at Sep. 30, 2023	25,470		2,080	1,455	625
Beginning Balance at Mar. 31, 2023			2,067	1,455	612
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343	343	25		25
Common stock dividends	(359)	(359)	(18)		(18)
Ending Balance at Jun. 30, 2023			2,074	1,455	619
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	700	700	43		43
Common stock dividends	(358)	$ (358)	(37)		(37)
Ending Balance at Sep. 30, 2023	$ 25,470		$ 2,080	$ 1,455	$ 625