XML 54 R42.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Commitments and Contingencies - Additional Information (Detail) | Aug. 12, 2022 | Jul. 09, 2021
--- | --- | ---
Commitments And Contingencies Disclosure [Abstract] |  |
Multiemployer plan number of years relief from risk of insolvency |  | 30 years
Time period for submission review the application | 120 days |

X
- Definition Multiemployer plan number of years relief from risk of insolvency. + References No definition available. + Details
Name: | sptn_MultiemployerPlanNumberOfYearsReliefFromRiskOfInsolvency
Namespace Prefix: | sptn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Time period for submission review the application + References No definition available. + Details
Name: | sptn_TimePeriodForSubmissionReviewTheApplication
Namespace Prefix: | sptn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration