Employee Benefit Plans and Postretirement Benefits - Projected Benefit Obligations in Excess of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 753	$ 656
Pension
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	1,091	969
Fair value of plan assets	836	733
Healthcare
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	179	181
Fair value of plan assets	58	58
Other
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	100	89
Fair value of plan assets	$ 0	$ 0