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Asset Impairment Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2023
Asset Impairment Expense [Line Items]              
Impairment of Long-Lived Assets Held-for-use $ 30 $ (154)   $ 42 $ (105)    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mong Duong Subsidiary [Member]              
Asset Impairment Expense [Line Items]              
Disposal Group Not Discontinued Operation Ownership Interest Sold             51.00%
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mong Duong Finance Holdings B.V._Related Party              
Asset Impairment Expense [Line Items]              
Disposal Group Not Discontinued Operation Ownership Interest Sold           51.00%  
Other Subsidiaries [Member]              
Asset Impairment Expense [Line Items]              
Impairment of Long-Lived Assets Held-for-use (2) 3   4 4    
AES Clean Energy Development | Clean Energy              
Asset Impairment Expense [Line Items]              
Impairment of Long-Lived Assets to be Disposed of   (51)          
Mong Duong held-for-sale              
Asset Impairment Expense [Line Items]              
Impairment of Long-Lived Assets to be Disposed of 0 (243) $ 17 0 (226)    
Mong Duong held-for-sale | Long Lived Assets held and Used              
Asset Impairment Expense [Line Items]              
Other Asset Impairment Charges       239      
AES Clean Energy Development Projects              
Asset Impairment Expense [Line Items]              
Impairment of Long-Lived Assets Held-for-use $ 32 $ 86   $ 38 $ 117