Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Name:	us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Employee Benefits - Components of Plan Benefit Expense Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Oct. 02, 2021	Sep. 26, 2020
Defined Benefit Plan Disclosure [Line Items]
Curtailment (gain) loss			$ (7)
Mark-to-Market Loss
Defined Benefit Plan Disclosure [Line Items]
Recognized net (gain) loss			$ 49
UNITED STATES \| Pension
Defined Benefit Plan Disclosure [Line Items]
Recognized net (gain) loss	$ 83	$ 7		$ 63	$ 15