Employee Benefit Obligations - AOCI, Obligations exceeding assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Amounts recognized in accumulated other comprehensive (earnings) loss
Decrease in net actuarial losses from prior period	$ 424
Benefit plans with an accumulated benefit obligation in excess of plan assets
Fair value of plan assets	$ 0	$ 0
Defined Benefit Plan, Funding Status [Extensible Enumeration]	us-gaap:UnfundedPlanMember	us-gaap:UnfundedPlanMember
Defined Benefit Pension Plans
Amounts recognized in accumulated other comprehensive (earnings) loss
Net actuarial (loss) gain	$ (689)	$ (265)
Net prior service (cost) credit	(31)	(29)
Tax effect and currency exchange rates	183	67
Accumulated other comprehensive (earnings) loss	(537)	(227)
Benefit plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	1,976	1,852
Accumulated benefit obligation	1,883	1,768
Fair value of plan assets	1,490	1,428
Defined Benefit Pension Plans | United States
Amounts recognized in accumulated other comprehensive (earnings) loss
Net actuarial (loss) gain	(261)	(208)
Net prior service (cost) credit	12	14
Tax effect and currency exchange rates	73	58
Accumulated other comprehensive (earnings) loss	(176)	(136)
Benefit plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	1,731	1,671
Accumulated benefit obligation	1,640	1,590
Fair value of plan assets	1,427	1,417
Accumulated benefit obligation	1,640	1,590
Defined Benefit Pension Plans | Non U.S.
Amounts recognized in accumulated other comprehensive (earnings) loss
Net actuarial (loss) gain	(428)	(57)
Net prior service (cost) credit	(43)	(43)
Tax effect and currency exchange rates	110	9
Accumulated other comprehensive (earnings) loss	(361)	(91)
Benefit plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	245	181
Accumulated benefit obligation	243	178
Fair value of plan assets	63	11
Accumulated benefit obligation	$ 2,189	$ 1,800