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Trust Investments - Additional Information (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
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 $ 24 $ 24 $ 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   (52)  
Debt Securities [Member] | Rabbi Trust [Member]      
Schedule of Trust Investments [Line Items]      
After tax amount of net unrealized gains (losses) recognized in AOCI   (21)  
Equity Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]      
Schedule of Trust Investments [Line Items]      
Unrealized Gains (Losses) on Equity Securities still held 98 113  
Equity Securities [Member] | Rabbi Trust [Member]      
Schedule of Trust Investments [Line Items]      
Unrealized Gains (Losses) on Equity Securities still held $ 2 $ 1