v3.26.1
Litigation and Environmental - Environmental Matters General (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Jan. 27, 2026
Plans
Dec. 31, 2025
USD ($)
Commitments and Contingencies Disclosure [Abstract]      
Accrual for Environmental Loss Contingencies $ 175   $ 176
Recorded Third-Party Environmental Recoveries Receivable $ 9   $ 10
Challenge to Federal Good Neighbor Plan | Ozone emissions | Environmental Protection Agency      
Loss Contingencies [Line Items]      
Loss contingency, Number of State Implementation Plans | Plans   8