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Leases - Additional Information (Detail)	12 Months Ended
	Dec. 28, 2024
Minimum [Member]
Lessee Lease Description [Line Items]
Leases, renewal term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Leases, renewal term	10 years

X

- Definition

Lessee, lease renewal term.

+ References

No definition available.

+ Details

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Namespace Prefix:	sptn_
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Balance Type:	na
Period Type:	duration

X

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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- Details

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- Details

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