Pension and Postretirement Benefit Obligations - Additional Information (Detail) - Pension Plans [Member]	3 Months Ended
Sep. 29, 2019 USD ($) Benefit_Plan	Dec. 29, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of company-sponsored pension plans \| Benefit_Plan	2
Entity contribution to pension plans during the period	$ 4,900,000
Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit pension plan, contributions		$ 0

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

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-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration