v3.26.3
Asset Retirement Obligations and Accrued Environmental Costs - Schedule of Disaggregation of Asset Retirement Obligations (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Asset Retirement Obligation [Line Items]    
Asset retirement obligations $ 534 $ 514
Nuclear fuel    
Asset Retirement Obligation [Line Items]    
Asset retirement obligations 298 272
Non-nuclear    
Asset Retirement Obligation [Line Items]    
Asset retirement obligations $ 236 $ 242