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Equity
 3 Months Ended
Mar. 31, 2024
Equity [Abstract]  
Stockholders' Equity Note Disclosure
In April 2024, DPL received a $30.0 million capital contribution from AES. DPL then made the same investment in AES Ohio. The proceeds from the equity contribution allow AES Ohio to seek to improve its infrastructure and modernize its grid while maintaining liquidity.