v3.26.1
Asset Retirement Obligations and Accrued Environmental Costs - Schedule of Disaggregation of Asset Retirement Obligations (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Asset Retirement Obligation [Line Items]    
Asset retirement obligations $ 531 $ 514
Nuclear    
Asset Retirement Obligation [Line Items]    
Asset retirement obligations 289 272
Non-nuclear    
Asset Retirement Obligation [Line Items]    
Asset retirement obligations $ 242 $ 242