XML 66 R53.htm IDEA: XBRL DOCUMENT v3.25.0.1

Acquisitions - (Additional Information) (Details) $ in Millions	12 Months Ended
	Dec. 28, 2024 Store RetailSegment	Dec. 28, 2024 USD ($) Store
Acquisition and Integration Costs | $		$ 2.4
Number of Acquisitions | RetailSegment	3
Metcalfe [Member]
Number of Stores	3	3
Number of Employees	500	500
Fresh Encounter [Member]
Number of Stores	49	49
Number of Employees	2,500	2,500
Markham [Member]
Number of Stores	3	3
Number of Employees	40	40

X

- Definition

Number of persons employed by the Entity

+ References

No definition available.

+ Details

Name:	dei_EntityNumberOfEmployees
Namespace Prefix:	dei_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Business Acquisitions Costs Of Acquired Entity Transaction Costs

+ References

No definition available.

+ Details

Name:	sptn_BusinessAcquisitionsCostsOfAcquiredEntityTransactionCosts
Namespace Prefix:	sptn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of Acquisitions

+ References

No definition available.

+ Details

Name:	sptn_NumberOfAcquisitions
Namespace Prefix:	sptn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of stores.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfStores
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=sptn_MetcalfeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=sptn_FreshEncounterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=sptn_MarkhamMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: