v3.26.1
Trust Investments - Additional Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
Facility
Schedule of Trust Investments [Line Items]  
Number of Nuclear Facilities | Facility 5
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 $ (38)
Debt Securities [Member] | Rabbi Trust [Member]  
Schedule of Trust Investments [Line Items]  
After tax amount of net unrealized gains (losses) recognized in AOCI (19)
Equity Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]  
Schedule of Trust Investments [Line Items]  
Unrealized Gains (Losses) on Equity Securities still held (16)
Equity Securities [Member] | Rabbi Trust [Member]  
Schedule of Trust Investments [Line Items]  
Unrealized Gains (Losses) on Equity Securities still held $ (1)