Employee Benefits - Schedule of accumulated benefit obligations (Details) - Pension - USD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| U.S. Plans | ||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||
| Defined benefit plan, accumulated benefit obligation | $ 3,301 | $ 3,475 |
| Foreign Plan | ||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | ||
| Defined benefit plan, accumulated benefit obligation | $ 792 | $ 815 |