Postretirement Plans - Additional Information (Detail) - USD ($)	3 Months Ended		4 Months Ended	6 Months Ended	9 Months Ended
	Oct. 09, 2021	Oct. 03, 2020	Apr. 18, 2020	Jul. 17, 2021	Oct. 09, 2021
Pension and Other Postretirement Benefits Disclosure [Line Items]
Voluntarily contributions made by an employer					$ 0
Multiemployer plan, withdrawal obligation	$ 2,100,000				2,100,000
Multiemployer plan withdrawal liability of net present value monthly payments period	20 years
Multiemployer plans transition payments payable	$ 1,200,000				1,200,000
Multiemployer plan withdrawal liability estimate payment period	3 years
Plan No. 1
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined benefit plan assets, transferred			$ 6,400,000
Defined benefit plans non-cash settlement charge			116,200,000
Settlement loss			111,900,000		$ 0
Defined benefit plan obligation, curtailment loss			$ 4,300,000
Defined benefit plan, revised settlement and curtailment loss				$ 108,800,000
Plan No. 2
Pension and Other Postretirement Benefits Disclosure [Line Items]
Voluntarily contributions made by an employer		$ 7,600,000