Income taxes - Schedule of net income tax and related interest paid (Details) $ in Millions	12 Months Ended
Dec. 31, 2025 USD ($)
Income tax and related interest paid (net of refunds received) to:
U.S. Federal	$ 605
U.S. State and local	138
Non-U.S.
Net income tax and related interest paid	2,206
Switzerland
Non-U.S.
Total Non-U.S.	500
China
Non-U.S.
Total Non-U.S.	264
Brazil
Non-U.S.
Total Non-U.S.	135
India
Non-U.S.
Total Non-U.S.	128
Other
Non-U.S.
Total Non-U.S.	$ 436

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