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Asset Impairment Expense (Impairment of Long-Lived Assets Held and Used by Asset) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Jun. 30, 2024
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Mar. 31, 2024
Asset Impairment Expense [Line Items]                  
Asset impairment expense   $ (74) $ (38) $ (84) $ (158) $ (374) $ (1,067) $ (763)  
Impairment of Long-Lived Assets Held-for-use           $ 374 1,067 763  
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration]           Asset impairment expense      
Finance Lease, Right-of-Use Asset $ 547         $ 547 250    
Operating Lease, Right-of-Use Asset 372         372 380    
Right-of-use Asset, Operating and Financing 919         919 630    
Finance Lease, Liability 571         571 270    
Operating Lease, Liability, Current 26         26 37    
Operating Lease, Liability, Noncurrent 392         392 387    
Operating Lease, Liability 418         418 424    
Lease Liability, Operating and Financing 989         989 694    
Nonrecourse [Member]                  
Asset Impairment Expense [Line Items]                  
Finance Lease, Liability, Current 18         18 8    
Finance Lease, Liability, Noncurrent $ 553         $ 553 262    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Jordan (IPP1 & IPP4)                  
Asset Impairment Expense [Line Items]                  
Disposal Group Not Discontinued Operation Ownership Interest Sold                 26.00%
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | AES Brasil                  
Asset Impairment Expense [Line Items]                  
Disposal Group Not Discontinued Operation Ownership Interest Sold 47.30% 47.30%     47.30% 47.30%      
Other                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           $ 12 15 8  
Ventanas 3 & 4                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           125 0 0  
AES PR                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           80 0 0  
AES Jordan                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           0 59 76  
AES Bulgaria                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           0 0 468  
Mong Duong held-dfor-sale [Member]                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets to be Disposed of           62 167 0  
Norgener                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           0 137 0  
TEG                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           0 77 104  
TEP                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           0 59 89  
New York Wind                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets to be Disposed of           0 186 0  
Warrior Run                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets to be Disposed of           0 198 0  
GAF Projects                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use           0 18 0  
AES Clean Energy Development Projects                  
Asset Impairment Expense [Line Items]                  
Impairment of Long-Lived Assets Held-for-use $ 137         $ 95 $ 151 $ 18