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Accounting for Derivative Instruments and Hedging Activities - AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Beginning balance $ 4,994 $ 4,026 $ 3,300
Mark-to-market of cash flow hedge accounting contracts (4) (6) 28
Ending balance 5,564 4,994 4,026
Accumulated other comprehensive income 3 7  
Income expected to be realized from OCI during the next 12 months, net of income tax expense of $1 1    
Accumulated OCL ending balance, income tax benefit 1 2 3
Losses expected to be realized from OCL during the next 12 months, income tax benefit 1    
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent      
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Beginning balance 18 24 (11)
Ending balance 14 18 24
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest      
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Reclassified from accumulated OCI (OCL) to income due to realization of previously deferred amounts (1) (4) 4
Mark-to-market of cash flow hedge accounting contracts (3) (2) 24
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest | Capistrano Wind Portfolio      
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Capistrano Wind Portfolio Acquisition 0 0 7
Non-controlling Interest      
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Beginning balance 2,893 1,792 1,466
Ending balance 3,501 2,893 1,792
Accumulated other comprehensive income 11 11 15
Non-controlling Interest | Capistrano Wind Portfolio      
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Capistrano Wind Portfolio Acquisition 3    
Accumulated Other Comprehensive (Loss) Income      
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Beginning balance 7 9 (6)
Ending balance 3 7 9
Accumulated other comprehensive income 3 $ 7 $ 9
Clearway Energy, Inc. | Capistrano Wind Portfolio      
Derivatives used in Net Investment Hedge, Net of Tax [Roll Forward]      
Capistrano Wind Portfolio Acquisition $ 4