Pensions Benefit Plans and Other Postretirement Benefits - Changes in the Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Benefit Plans.
Change in benefit obligations:
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Operating Income (Expense), Net	Other Operating Income (Expense), Net	Other Operating Income (Expense), Net
Pension Benefit Plans. | U.S.
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	$ 860	$ 1,242
Change in benefit obligations:
Service cost	6	13	$ 13
Interest cost	45	35	40
Actuarial (gain) loss	23	(320)
Settlements		(20)
Benefit payments	(70)	(90)
Other	2
Net change in benefit obligations	6	(382)
Obligations at end of year	866	860	1,242
Pension Benefit Plans. | Non-U.S.
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	669	990
Change in benefit obligations:
Service cost	8	10	12
Interest cost	38	24	21
Actuarial (gain) loss	25	(221)
Settlements	(31)	(17)
Curtailments	13
Benefit payments	(41)	(42)
Other	1	3
Foreign currency translation	45	(78)
Net change in benefit obligations	58	(321)
Obligations at end of year	$ 727	$ 669	$ 990
Other Postretirement Benefits Plan
Change in benefit obligations:
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Operating Income (Expense), Net	Other Operating Income (Expense), Net	Other Operating Income (Expense), Net
Other Postretirement Benefits Plan | U.S.
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	$ 22	$ 34
Change in benefit obligations:
Interest cost	1	1	$ 2
Actuarial (gain) loss		(11)
Benefit payments	(2)	(2)
Net change in benefit obligations	(1)	(12)
Obligations at end of year	21	22	34
Other Postretirement Benefits Plan | Non-U.S.
Changes in the pension and postretirement benefit obligations
Obligations at beginning of year	45	76
Change in benefit obligations:
Service cost	1	2	2
Interest cost	2	2	2
Actuarial (gain) loss	3	(29)
Benefit payments	(2)	(3)
Foreign currency translation	1	(3)
Net change in benefit obligations	5	(31)
Obligations at end of year	$ 50	$ 45	$ 76