Employee Benefit Obligations - Change in benefit accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in plan assets:
Fair value of plan assets at prior year end	$ 1,935
Actual return on plan assets	(252)
Effect of exchange rates	27
Fair value of plan assets at end of year	1,656	$ 1,935
Defined Benefit Pension Plans
Change in projected benefit obligation:
Benefit obligation at prior year end	3,437	3,055
Service cost	18	21	$ 37
Interest cost	142	149	84
Benefits paid	(239)	(241)
Net actuarial (gains) losses	(276)	351
Settlements and other		(2)
Other	(1)	3
Effect of exchange rates	(43)	101
Benefit obligation at year end	3,038	3,437	3,055
Change in plan assets:
Fair value of plan assets at prior year end	3,155	3,099
Actual return on plan assets	(106)	168
Employer contributions	32	25
Benefits paid	(239)	(241)
Settlements and other		(2)
Other	1	1
Effect of exchange rates	(32)	105
Fair value of plan assets at end of year	2,811	3,155	3,099
Funded status	(227)	(282)
Defined Benefit Pension Plans | U.S.
Change in projected benefit obligation:
Benefit obligation at prior year end	1,246	1,253
Service cost	15	16	27
Interest cost	60	63	37
Benefits paid	(118)	(116)
Net actuarial (gains) losses	(50)	29
Settlements and other		(2)
Other		3
Benefit obligation at year end	1,153	1,246	1,253
Change in plan assets:
Fair value of plan assets at prior year end	1,106	1,111
Actual return on plan assets	52	106
Employer contributions	11	7
Benefits paid	(118)	(116)
Settlements and other		(2)
Fair value of plan assets at end of year	1,051	1,106	1,111
Funded status	(102)	(140)
Defined Benefit Pension Plans | Non-U.S.
Change in projected benefit obligation:
Benefit obligation at prior year end	2,191	1,802
Service cost	3	5	10
Interest cost	82	86	47
Benefits paid	(121)	(125)
Net actuarial (gains) losses	(226)	322
Other	(1)
Effect of exchange rates	(43)	101
Benefit obligation at year end	1,885	2,191	1,802
Change in plan assets:
Fair value of plan assets at prior year end	2,049	1,988
Actual return on plan assets	(158)	62
Employer contributions	21	18
Benefits paid	(121)	(125)
Other	1	1
Effect of exchange rates	(32)	105
Fair value of plan assets at end of year	1,760	2,049	$ 1,988
Funded status	$ (125)	$ (142)