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