Equity (Details) - USD ($) $ in Millions			3 Months Ended
	Apr. 26, 2023	Apr. 24, 2023	Mar. 31, 2023
Stockholders' Equity Note Disclosure			SHAREHOLDER'S DEFICITIn April 2023, DPL received a $50.0 million cash contribution from AES. Subsequently, DPL made a $50.0 million capital contribution to AES Ohio. The contribution at DPL will be allocated partially to DPL's outstanding tax receivable from AES, with the balance recorded as an equity contribution. The proceeds from the equity contribution allow AES Ohio to seek to improve its infrastructure and modernize its grid while maintaining liquidity.
Subsidiaries [Member]
Stockholders' Equity Note Disclosure			SHAREHOLDER'S EQUITYIn April 2023, DPL made a capital contribution of $50.0 million to AES Ohio. The proceeds allow AES Ohio to seek to improve its infrastructure and modernize its grid while maintaining liquidity.
Subsequent Event
Cash Contribution from Parent Company		$ 50.0
Subsequent Event | Subsidiaries [Member]
Proceeds from Contributions from Parent	$ 50.0