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The amount of the before-tax charge of commitments and withdrawal liabilities associated with the restructuring of pension plan agreements.

No definition available.

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Represents the minimum percentage that the Company contributed to the pension fund, as a percentage of the total amount contributed by all employers participating in the plan.

No definition available.

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Represents the total number of most significant collective bargaining agreements for the entity related to this pension fund.

No definition available.

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Data Type:	xbrli:integerItemType
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Amount paid for of multi-employer withdrawal obligation during the period.

No definition available.

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Represents percentage of funded status.

No definition available.

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Amount of transferred net accrued pension liabilities and prepaid escrow funds, before tax, to fulfill multiemployer obligations during the period.

No definition available.

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Amount of transferred net accrued pension liabilities and prepaid escrow funds, net of tax, to fulfill multiemployer obligations during the period.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount of commitment to transition reserve in new variable annuity pension plan.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount of withdrawal liability and commitment to transition reserve in new variable annuity pension plan.

No definition available.

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Data Type:	xbrli:monetaryItemType
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The amount of short term multiemployer plans withdrawal and transition reserve commitment liability.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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The amount of long term multiemployer plans withdrawal and transition reserve commitment liability.

No definition available.

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Data Type:	xbrli:monetaryItemType
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The period over which repayment of withdrawal and transition reserve commitment liability will be settled.

No definition available.

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Period Type:	duration

Represents the period for additional contributions to be made to the multiemployer plans by the employer.

No definition available.

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Data Type:	xbrli:durationItemType
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The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

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Period Type:	instant

Amount of cost for employer contribution to multiemployer plan. Multiemployer plan includes, but is not limited to, pension plan determined to be individually significant and insignificant and other postretirement benefit plan.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-Section 55
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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.

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Name:	us-gaap_RetirementPlanNameAxis=kr_SOCAUFCWUnionsAndFoodEmployersJointPensionTrustFundMember
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Data Type:	na
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Name:	us-gaap_RetirementPlanNameAxis=kr_DesertStatesEmployersAndUFCWUnionsPensionPlanMember
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Data Type:	na
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Name:	us-gaap_RetirementPlanNameAxis=kr_SoundVariableAnnuityPensionTrustMember
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Data Type:	na
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Name:	us-gaap_RetirementPlanNameAxis=kr_OregonRetailEmployeesPensionPlanMember
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Name:	us-gaap_RetirementPlanNameAxis=kr_BakeryAndConfectionaryUnionAndIndustryInternationalPensionFundMember
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Data Type:	na
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Name:	us-gaap_RetirementPlanNameAxis=kr_RetailFoodEmployersAndUFCWLocal711PensionMember
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Data Type:	na
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Name:	us-gaap_RetirementPlanNameAxis=kr_UnitedFoodAndCommercialWorkersIntlUnionIndustryPensionFundMember
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Name:	us-gaap_RetirementPlanNameAxis=kr_WesternConferenceOfTeamstersPensionPlanMember
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