v3.25.1
Trust Investments - Additional Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2025
USD ($)
Facility
Dec. 31, 2024
USD ($)
Schedule of Trust Investments [Line Items]    
Number of Nuclear Facilities | Facility 5  
Nuclear Decommissioning Trust (NDT) Fund [Member]    
Schedule of Trust Investments [Line Items]    
NDT Fund Foreign Currency $ 30 $ 24
Debt Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]    
Schedule of Trust Investments [Line Items]    
After tax amount of net unrealized gains (losses) recognized in AOCI (55)  
Debt Securities [Member] | Rabbi Trust [Member]    
Schedule of Trust Investments [Line Items]    
After tax amount of net unrealized gains (losses) recognized in AOCI (22)  
Equity Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]    
Schedule of Trust Investments [Line Items]    
Unrealized Gains (Losses) on Equity Securities still held 17  
Equity Securities [Member] | Rabbi Trust [Member]    
Schedule of Trust Investments [Line Items]    
Unrealized Gains (Losses) on Equity Securities still held $ (1)