Fair value measurements - Schedule of Derivatives Recorded in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Carrying Amount of the Hedged Liability	$ 4,564	$ 6,037
Long-term Debt \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Carrying Amount of the Hedged Liability	7,935	8,862
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Liability	$ (1,132)	$ (1,216)

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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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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Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk.

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