Income taxes - Summary of Activity Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Summary of unrecognized tax benefits
Beginning of year	$ 2,485	$ 3,716	$ 3,210
Increases related to current year tax positions	176	239	523
Increases related to prior period tax positions	129	244	143
Decreases related to prior period tax positions	(147)	(781)	(148)
Settlements	(583)	(880)	(1)
Lapse of statute of limitations	(40)	(53)	(11)
End of year	$ 2,020	$ 2,485	$ 3,716

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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