v3.26.1
Asset Retirement Obligations - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Asset Retirement Obligations [Line Items]    
Net decrease due to changes in, and timing of, estimated future cash flows $ 285  
Nuclear decommissioning trust funds 19,366 $ 19,336
Assets, Total    
Asset Retirement Obligations [Line Items]    
Nuclear decommissioning trust funds 19,494 $ 19,396
Nuclear Decommissioning    
Asset Retirement Obligations [Line Items]    
Net decrease due to changes in, and timing of, estimated future cash flows $ (1,277)