Name:	svu_GuaranteeObligationMaximumExposureDiscounted
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Remaining term for guarantee for other debt obligation maximum (in years).

No definition available.

Name:	svu_RemainingTermForGuaranteeForOtherDebtObligationMaximum
Namespace Prefix:	svu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Remaining term for guarantee for other debt obligation minimum (less than given term in years).

No definition available.

Name:	svu_RemainingTermForGuaranteeForOtherDebtObligationMinimum
Namespace Prefix:	svu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Remaining term for guarantee for other debt obligation weighted average (in years).

No definition available.

Name:	svu_RemainingTermForGuaranteeForOtherDebtObligationWeightedAverage
Namespace Prefix:	svu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.

No definition available.