Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(7)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)(7)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920

Name:	us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Retirement Plans - Narrative (Details)	3 Months Ended	4 Months Ended
Retirement Plans - Narrative (Details)	Jul. 05, 2020 USD ($)	Jan. 17, 2021 defined_benefit_plan healthcare_plan	Jan. 19, 2020 USD ($)	Jan. 01, 2019 USD ($)
Retirement Benefits [Abstract]
Number of sponsored defined benefit pension plans \| defined_benefit_plan		2
Lump sum payments from Qualified Plan	$ 122,300,000
Pension settlement			$ (38,600,000)
Number of postretirement health care plans \| healthcare_plan		2
Minimum required contribution for retirement plans				$ 0