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, 2022			$ 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			1,950	1,356	594
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,711		128
Ending Balance at Sep. 30, 2023			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			2,080	1,455	625
Beginning Balance at Dec. 31, 2023	25,755		2,093	1,455	638
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	658	658	66		66
Common stock dividends	(381)	(381)	(45)		(45)
Contributions from parent			154	154
Ending Balance at Mar. 31, 2024			2,268	1,609	659
Beginning Balance at Dec. 31, 2023	25,755		2,093	1,455	638
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,813		156
Ending Balance at Sep. 30, 2024	26,622		2,246	1,615	631
Beginning Balance at Mar. 31, 2024			2,268	1,609	659
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	448	448	34		34
Common stock dividends	(380)	(380)	(39)		(39)
Ending Balance at Jun. 30, 2024			2,263	1,609	654
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	707	707	55		55
Common stock dividends	(381)	$ (381)	(78)		(78)
Contributions from parent			6	6
Ending Balance at Sep. 30, 2024	$ 26,622		$ 2,246	$ 1,615	$ 631