v3.26.3
Retirement and Other Postretirement Benefits - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Defined Benefit Plan Disclosure [Line Items]        
Pension and Other post-retirement benefits - net settlements (F) $ 1 $ 0 $ 1 $ 0
Contributions and payments 17 17 44 36
Pension benefits        
Defined Benefit Plan Disclosure [Line Items]        
Pension and Other post-retirement benefits - net settlements (F) $ 1 $ 0 $ 1 $ 0