Goodwill and other intangible assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 18,629	$ 15,529
Changes to goodwill resulting from acquisitions, net	25	3,089
Foreign currency translation adjustments	(17)	11
Ending balance	$ 18,637	$ 18,629