v3.26.1
Shareholders' Equity - Income Taxes Allocated to Other Comprehensive Income (Loss) Components (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Actuarial loss reclassified to periodic benefit cost    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Pension and non-pension postretirement benefit plans $ (9) $ (6)
Pension and OPEB plans valuation adjustment    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Pension and non-pension postretirement benefit plans $ 8 $ 12