Fair value measurements - Schedule of Effect of Derivatives not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 29, 2026	Mar. 30, 2025
Not Designated as Hedging Instrument \| Forward foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized In Income on Derivative	$ (65)	$ 62

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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