v3.26.1
Equity Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent $ 1    
Unfunded pension obligation, Net of Tax (16)   $ (16)
Foreign currency translation adjustment, Net of Tax (1,166)   (1,168)
Accumulated Other Comprehensive Income (Loss), Net of Tax (696)   (698)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 5    
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax 483   483
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (4)    
Total foreign currency translation adjustment, net of income tax 2 $ 30  
Total pension adjustments, net of income tax 0 $ (1)  
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax 3   $ 3
Accumulated Defined Benefit Plans Adjustment [Member]      
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    
Accumulated Translation Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 2    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0    
Total foreign currency translation adjustment, net of income tax 2    
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    
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net (Deprecated 2025) 0    
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 3    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (4)    
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred (1)    
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net (Deprecated 2025) 1    
AES Brasil [Domain]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Foreign currency translation adjustment, Net of Tax 0    
Accumulated Other Comprehensive Income (Loss), Net of Tax 1    
AES Brasil [Domain] | Accumulated Defined Benefit Plans Adjustment [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Unfunded pension obligation, Net of Tax $ 0