Name:	kr_BusinessAcquisitionsIncreaseDecreaseInInventoryLIFOReserve
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Data Type:	xbrli:monetaryItemType
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Amount of proforma net income (loss) attributable to noncontrolling interest for the period as if the business combination or combinations had been completed at the beginning of a period.

No definition available.

Name:	kr_BusinessAcquisitionsProFormaNetIncomeLossAttributableToNoncontrollingInterest
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The proforma profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest for the period as if the business combination or combinations had been completed at the beginning of a period.

No definition available.

Name:	kr_BusinessAcquisitionsProFormaProfitLoss
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionProFormaInformationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

Name:	us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.