Schedule I - Condensed Financial Information of Parent (Senior Notes and Junior Subordinated Notes) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	$ 5,704			$ 4,464
Recourse Debt Current	(899)			(200)
Recourse Debt Non Current	4,805	$ 4,840	$ 5,256	4,264
Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	5,704
Recourse Debt Current	(899)
Debt Maturity Year One [Member]
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	900
Debt Maturity Year One [Member] \| Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	900
Debt Maturity Year Two [Member]
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	800
Debt Maturity Year Two [Member] \| Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	800
Debt Maturity Year Three [Member]
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	0
Debt Maturity Year Three [Member] \| Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	0
Debt Maturity Year Four [Member]
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	900
Debt Maturity Year Four [Member] \| Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	900
Debt Maturity Year Five [Member]
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	0
Debt Maturity Year Five [Member] \| Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	0
Thereafter
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	3,150
Thereafter \| Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	3,150
Senior Variable Rate Term Loan due 2024 \| Parent Company \| Revolving Credit Facility [Member] \| Recourse Debt
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	0			200
Recourse Debt Excluding Junior Subordinated Debt \| Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	5,704			4,464
Recourse Debt Non Current	$ 4,805			$ 4,264

AES CORP 10-K