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- Definition

Payment To Retired Participants

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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- Definition

Amount of cost for defined contribution plan.

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- Definition

Amount of increase (decrease) in obligation for pension and other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans.

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- Definition

Percentage of employer contribution required by collective-bargaining arrangement (CBA) to total contribution from all participating employers in multiemployer pension plan determined to be individually significant.

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Amount of contribution received by multiemployer pension plan from all employers participating in multiemployer pension plan determined to be individually significant.

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Description of the significant collective-bargaining arrangements within the range of expiration dates for collective-bargaining arrangements requiring contributions to a multiemployer plan as well as other information to help investors understand the significance of the collective-bargaining agreements and when they expire. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

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Amount of noncurrent assets classified as other.

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Associate Retirement Plans - Additional Information (Detail) - USD ($) $ in Thousands			12 Months Ended
	Jun. 28, 2024	Jul. 01, 2023	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans expense			$ 11,900	$ 12,000	$ 12,000
Cash surrender value of plan assets included in other long term assets			104,434	103,174
Michigan Conference of Teamsters and Ohio Conference of Teamsters Health and Welfare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution made in Health and Welfare Plan			15,900	17,000	13,400
Central States, Southeast and Southwest Areas Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution made in Health and Welfare Plan			$ 13,500	13,100	12,300
Collective bargaining arrangement description			The Company is party to five CBAs that require contributions to the Central States Plan with expiration dates ranging from April 2026 to February 2030. These CBAs cover warehouse personnel and drivers in Grand Rapids, Michigan and Bellefontaine and Lima, Ohio.
Central States, Southeast and Southwest Areas Pension Plan [Member] \| Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage representing contribution funded to plan total contribution			5.00%
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (Decrease) in obligations			$ 6,600
Net periodic benefit (income) expense			(1,407)	(2,674)	(452)
Fair value of plan assets			$ 0	$ 0	$ 0
Spartan Nash Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Payment to retired participants	$ 1,300	$ 1,300
Net periodic benefit (income) expense	$ 100	$ 300
Postretirement Health [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan employees minimum period of service			10 years