v3.25.2
Equity Accumulated Other Comprehensive Loss (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent     $ (61,000,000)    
Unfunded pension obligation, Net of Tax $ (20,000,000)   (20,000,000)   $ (24,000,000)
Foreign currency translation adjustment, Net of Tax (1,211,000,000)   (1,211,000,000)   (1,282,000,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax (836,000,000)   (836,000,000)   (766,000,000)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax     (52,000,000)    
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax 392,000,000   392,000,000   537,000,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax     (9,000,000)    
Total foreign currency translation adjustment, net of income tax 42,000,000 $ (136,000,000) 72,000,000 $ (179,000,000)  
Total pension adjustments, net of income tax 5,000,000 (1,000,000) (4,000,000) (1,000,000)  
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax 3,000,000   3,000,000   $ 3,000,000
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION (95,000,000) 276,000,000 (49,000,000) 708,000,000  
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax     (119,000,000)    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax     (9,000,000)    
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred     (128,000,000)    
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Reclassification out of Accumulated Other Comprehensive Income [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION $ (6,000,000) $ (19,000,000) 9,000,000 $ (17,000,000)  
Accumulated Defined Benefit Plans Adjustment [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax     (4,000,000)    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax     0    
Total pension adjustments, net of income tax     (4,000,000)    
Accumulated Translation Adjustment [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax     71,000,000    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax     0    
Total foreign currency translation adjustment, net of income tax     71,000,000    
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax     0    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax     0    
Total pension adjustments, net of income tax     $ 0