Pension and Other Benefit Programs - Effect on Accumulated Other Comprehensive Income (Details) $ in Millions |
Dec. 31, 2025
USD ($)
|
|---|---|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
| Unrecognized net actuarial losses/(gains), after tax | $ 47 |
| Pension Plans | |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
| Unrecognized net actuarial losses/(gains), after tax | 71 |
| SERP Plans | |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
| Unrecognized net actuarial losses/(gains), after tax | 3 |
| Post-retirement Benefit Plans | |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |
| Unrecognized net actuarial losses/(gains), after tax | $ (27) |