Income Taxes - Summary of Activity Related to Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Summary of unrecognized tax benefits
Beginning of year	$ 3,853	$ 3,326	$ 3,151
Increases related to current year tax positions	265	249	242
Increases related to prior period tax positions	668	408	145
Decreases related to prior period tax positions	(551)	(105)	(137)
Settlements	(839)	(9)	(40)
Lapse of statute of limitations	(23)	(16)	(35)
End of year	$ 3,373	$ 3,853	$ 3,326

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.

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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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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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