Pension and other postretirement benefits - Schedule of Funded Status of Plans and Amounts Recognized (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plans | U.S.
Change in benefit obligation:
Benefit obligation at beginning of year	$ 496	$ 497
Service cost	2	1	$ 2
Interest cost	24	24	18
Amendments	0	0
Actuarial (gains) and losses	(24)	9
Benefits paid	(34)	(35)
Plan participant contributions	0	0
Curtailments	0	0
Settlements	0	0
Net transfer in/(out) (including the effect of any business combinations/divestitures)	0	0
Foreign currency rate changes	0	0
Benefit obligation at end of year	464	496	497
Change in plan assets
Fair value of plan assets at beginning of year	449	446
Actual gain on plan assets	17	37
Employer contributions	2	1
Plan participant contributions	0	0
Benefits paid	(34)	(35)
Settlements	0	0
Net transfer in (including effect of any business combinations/divestitures)	0	0
Foreign currency rate changes	0	0
Fair value of plan assets at end of year	434	449	446
Reconciliation of funded status:
Fair value of plan assets	434	449	446
Benefit obligation	464	496	497
Funded status	(30)	(47)
Accumulated Benefit Obligation	464	496
Amounts recognized in the Consolidated Balance Sheets:
Noncurrent assets	0	0
Current liabilities	(2)	(2)
Noncurrent liabilities	(28)	(45)
Liabilities held for sale	0	0
Funded status at end of year	(30)	(47)
Accumulated other comprehensive loss
Net actuarial (gain) loss	(45)	(68)
Prior service cost (credit)	(1)	(1)
Total accumulated other comprehensive (loss) income	(46)	(69)
Pension Plans | Non-U.S.
Change in benefit obligation:
Benefit obligation at beginning of year	2,414	2,105
Service cost	39	31	55
Interest cost	81	86	43
Amendments	0	(1)
Actuarial (gains) and losses	(28)	178
Benefits paid	(104)	(89)
Plan participant contributions	10	9
Curtailments	(4)	0
Settlements	(7)	(4)
Net transfer in/(out) (including the effect of any business combinations/divestitures)	27	0
Foreign currency rate changes	(145)	99
Benefit obligation at end of year	2,283	2,414	2,105
Change in plan assets
Fair value of plan assets at beginning of year	2,524	2,316
Actual gain on plan assets	77	143
Employer contributions	36	38
Plan participant contributions	10	9
Benefits paid	(104)	(89)
Settlements	(7)	(4)
Net transfer in (including effect of any business combinations/divestitures)	82	0
Foreign currency rate changes	(155)	111
Fair value of plan assets at end of year	2,463	2,524	2,316
Reconciliation of funded status:
Fair value of plan assets	2,463	2,524	2,316
Benefit obligation	2,283	2,414	2,105
Funded status	180	110
Accumulated Benefit Obligation	2,231	2,349
Amounts recognized in the Consolidated Balance Sheets:
Noncurrent assets	290	271
Current liabilities	(4)	(4)
Noncurrent liabilities	(106)	(111)
Liabilities held for sale	0	(46)
Funded status at end of year	180	110
Accumulated other comprehensive loss
Net actuarial (gain) loss	(190)	(225)
Prior service cost (credit)	74	92
Total accumulated other comprehensive (loss) income	(116)	(133)
OPEB
Change in benefit obligation:
Benefit obligation at beginning of year	105	100
Service cost	3	2	3
Interest cost	5	5	3
Amendments	0	0
Actuarial (gains) and losses	(10)	3
Benefits paid	(5)	(5)
Plan participant contributions	0	0
Curtailments	0	0
Settlements	0	0
Net transfer in/(out) (including the effect of any business combinations/divestitures)	(1)	0
Foreign currency rate changes	(2)	0
Benefit obligation at end of year	95	105	100
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Actual gain on plan assets	0	0
Employer contributions	5	5
Plan participant contributions	0	0
Benefits paid	(5)	(5)
Settlements	0	0
Net transfer in (including effect of any business combinations/divestitures)	0	0
Foreign currency rate changes	0	0
Fair value of plan assets at end of year	0	0	0
Reconciliation of funded status:
Fair value of plan assets	0	0	0
Benefit obligation	95	105	$ 100
Funded status	(95)	(105)
Accumulated Benefit Obligation
Amounts recognized in the Consolidated Balance Sheets:
Noncurrent assets	0	0
Current liabilities	(6)	(6)
Noncurrent liabilities	(89)	(98)
Liabilities held for sale	0	(1)
Funded status at end of year	(95)	(105)
Accumulated other comprehensive loss
Net actuarial (gain) loss	42	35
Prior service cost (credit)	2	3
Total accumulated other comprehensive (loss) income	44	38
OPEB | Non-U.S.
Change in benefit obligation:
Benefit obligation at beginning of year	11
Benefit obligation at end of year	8	11
Reconciliation of funded status:
Benefit obligation	$ 8	$ 11