v3.25.2
Debt and Credit Agreements - Summary of Outstanding Long-term Debt (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Debt Instrument [Line Items]    
Amount $ (1,008) $ (65)
Total long-term debt issued (redeemed) $ (1,008)  
Senior Loans | 2025 Senior Notes    
Debt Instrument [Line Items]    
Interest Rate 3.25%  
Amount $ (900)  
Nonrecourse | CR Nonrecourse Debt    
Debt Instrument [Line Items]    
Basis spread 2.25%  
Amount $ (33)  
Nonrecourse | Tax Exempt Pollution Control Revenue Bonds    
Debt Instrument [Line Items]    
Interest Rate 4.45%  
Amount $ (23)  
Nonrecourse | Continental Wind Nonrecourse Debt    
Debt Instrument [Line Items]    
Interest Rate 6.00%  
Amount $ (18)  
Nonrecourse | West Medway II Nonrecourse Debt    
Debt Instrument [Line Items]    
Amount (23)  
Nonrecourse | Antelope Valley DOE Nonrecourse Debt    
Debt Instrument [Line Items]    
Amount $ (9)  
Nonrecourse | RPG Nonrecourse Debt    
Debt Instrument [Line Items]    
Interest Rate 4.11%  
Amount $ (2)  
Nonrecourse | Minimum | West Medway II Nonrecourse Debt    
Debt Instrument [Line Items]    
Basis spread 3.225%  
Nonrecourse | Minimum | Antelope Valley DOE Nonrecourse Debt    
Debt Instrument [Line Items]    
Interest Rate 2.29%  
Nonrecourse | Maximum | West Medway II Nonrecourse Debt    
Debt Instrument [Line Items]    
Basis spread 3.35%  
Nonrecourse | Maximum | Antelope Valley DOE Nonrecourse Debt    
Debt Instrument [Line Items]    
Interest Rate 3.56%