Postretirement Plans - Additional Information (Detail) - USD ($)	4 Months Ended
	Apr. 20, 2024	Apr. 22, 2023	Dec. 30, 2023	Oct. 08, 2022
Pension and Other Postretirement Benefits Disclosure [Line Items]
Multi-employer pension plan withdrawal liability			$ 1,297,000	$ 1,300,000
Holsum Bakery
Pension and Other Postretirement Benefits Disclosure [Line Items]
Multi-employer pension plan withdrawal costs	$ 1,400,000
Selling, Distribution and Administrative expenses | Holsum Bakery
Pension and Other Postretirement Benefits Disclosure [Line Items]
Multi-employer pension plan additional withdrawal cost	100,000
Plan No. 1
Pension and Other Postretirement Benefits Disclosure [Line Items]
Voluntarily contributions made by an employer	$ 0	$ 0