Postretirement Benefit Plans - Additional Information (Details) - Pension - U.S. - USD ($)	3 Months Ended	24 Months Ended
Apr. 03, 2020	Sep. 27, 2019	Mar. 29, 2019	Jun. 29, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Qualified employer contribution	$ 0	$ 302,000,000	$ 0	$ 700,000,000
Voluntary employer contribution	$ 0

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Name:	us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration