XML 46 R32.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Recently Issued Accounting Standards - Additional Information (Detail) - Accounting Standards Update 2016-09 [Member] - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jul. 15, 2017 | Jul. 16, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Recognition of tax benefits in provision for income taxes | $ 1.3 |
Increase in net cash provided by operating activities |  | $ (2.5)
Increase in net cash used in financing activities |  | $ 2.5

X
- Definition New accounting pronouncement or change in accounting principle effect of change on financing activities. + References No definition available. + Details
Name: | sptn_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnFinancingActivities
Namespace Prefix: | sptn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition New accounting pronouncement or change in accounting principle effect of change on operating activities. + References No definition available. + Details
Name: | sptn_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnOperatingActivities
Namespace Prefix: | sptn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of the effect of a change in accounting principle on net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 + Details
Name: | us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 No definition available. + Details
Name: | us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201609Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |