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Stockholders' equity - Schedule of Components of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 6,232	$ 3,661	$ 6,700
Foreign currency translation adjustments	(76)	50	496
Unrealized gains	506	28	84
Reclassification adjustments to earnings	(117)	(222)	2
Other	(10)	42	2
Income taxes	(80)	44	(19)
Ending balance	5,877	6,232	3,661
Foreign currency translation adjustments
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(298)	(348)	(844)
Foreign currency translation adjustments	(76)	50	496
Unrealized gains	0	0	0
Reclassification adjustments to earnings	0	0	0
Other	0	0	0
Income taxes	0	0	0
Ending balance	(374)	(298)	(348)
Cash flow hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(22)	128	61
Foreign currency translation adjustments	0	0	0
Unrealized gains	506	28	84
Reclassification adjustments to earnings	(117)	(222)	2
Other	0	0	0
Income taxes	(80)	44	(19)
Ending balance	287	(22)	128
Other
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	31	(11)	(13)
Foreign currency translation adjustments	0	0	0
Unrealized gains	0	0	0
Reclassification adjustments to earnings	0	0	0
Other	(10)	42	2
Income taxes	0	0	0
Ending balance	21	31	(11)
AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(289)	(231)	(796)
Ending balance	$ (66)	$ (289)	$ (231)

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