Income taxes - Income before income taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
U.S.	$ 4,503	$ 4,438	$ 6,445
Non-U.S.	1,207	1,015	973
Income before income taxes	$ 5,710	$ 5,453	$ 7,418