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Equity Equity - Net Income (Loss) Attributable to The AES Corporation (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Jun. 30, 2024
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Equity [Abstract]              
Net income (loss) attributable to The AES Corporation $ 504 $ 276 $ 708 $ 1,212 $ 1,679 $ 249 $ (546)
Transfers from the noncontrolling interest:              
Net transfers (to) from noncontrolling interest         (821) 109 0
Change from net income (loss) attributable to The AES Corporation and transfers (to) from noncontrolling interests         858 358 (546)
Additional Paid-in Capital [Member]              
Transfers from the noncontrolling interest:              
Increase (decrease) in The AES Corporation's paid-in capital for sale of subsidiary shares (7) $ (9)     (19) 85 78
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests $ 2       $ (802) $ 24 $ (78)