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Asset Retirement Obligation (Details) - USD ($) $ in Millions	Dec. 31, 2025	Sep. 30, 2025
Unsecured Debt [Member] | Recourse
Property, Plant and Equipment [Line Items]
Issued senior notes		$ 500
Issued senior notes		$ 500
AES Andes | Andes Junior Notes due 2055 | Nonrecourse [Member]
Property, Plant and Equipment [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.15%

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Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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