Equity (Details) - USD ($)

3 Months Ended

Apr. 09, 2025

Mar. 31, 2025

Mar. 31, 2024

Payments to Acquire Productive Assets

$ (85,300,000)

$ (174,600,000)

Subsidiaries [Member]

Stockholders' Equity Note Disclosure

SHAREHOLDER'S EQUITY

On April 9, 2025, Ohio Holdings made an equity contribution to AES Ohio of $150.0 million. The proceeds from the equity contributions are intended primarily for funding needs related to AES Ohio’s capital expenditure program.

Stockholders' Equity, Other

(100,000)

Payments to Acquire Productive Assets

$ (85,300,000)

(173,100,000)

Subsidiaries [Member] | Other Additional Capital [Member]

Stockholders' Equity, Other

$ (100,000)

Subsequent Event

Stockholders' Equity Note Disclosure

SHAREHOLDER'S EQUITY

On April 9, 2025, Ohio Investments received equity capital contributions totaling $127.5 million, of which $105.0 million was contributed by DPL and $22.5 million was contributed by CDPQ. Ohio Holdings then received equity capital contributions totaling $150.0 million, of which $127.5 million was contributed by Ohio Investments and $22.5 million was contributed by CDPQ. Ohio Holdings then made the same investment in AES Ohio. The proceeds from the equity contributions are intended primarily for funding needs related to AES Ohio’s capital expenditure program. The equity capital contributions were made on a proportional share basis and, therefore, did not change CDPQ’s or DPL’s ownership interests in Ohio Investments or Ohio Holdings.

General Partners' Contributed Capital

$ 127,500,000

Equity Capital Contributions Received

127,500,000

Subsequent Event | CDPQ

General Partners' Contributed Capital

22,500,000

Subsequent Event | Ohio Holdings

Equity Capital Contributions Received

150,000,000

Subsequent Event | DPL

General Partners' Contributed Capital

$ 105,000,000