XML 39 R28.htm IDEA: XBRL DOCUMENT
v3.21.2

BENEFIT PLANS - MULTI EMPLOYER PLAN (Details) - Pension Benefits - USD ($) $ in Millions | 4 Months Ended | 6 Months Ended
--- | --- | ---
May 22, 2021 | Aug. 14, 2021 | Aug. 15, 2020
Multiemployer Plans |  |  |
Net accrued pension liabilities and prepaid escrow funds - before tax | $ 449 |  |
Net accrued pension liabilities and prepaid escrow funds - after tax | $ 344 |  |
Repayment period of commitments to transition reserve liability | 7 years |  |
Incremental contributions (before-tax) |  | $ 106 | $ 236
Incremental contributions (after-tax) |  | $ 81 | $ 180

X
- Definition Amount of incremental contributions, before tax, made to multiemployer plan, helping stabilize future associate benefits. + References No definition available. + Details
Name: | kr_MultiemployerPlanIncrementalContributions
Namespace Prefix: | kr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of incremental contributions, net of tax, made to multiemployer plan, helping stabilize future associate benefits. + References No definition available. + Details
Name: | kr_MultiemployerPlanIncrementalContributionsNetOfTax
Namespace Prefix: | kr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net after tax amount of multiemployer plans transition accrued pension liability and prepaid escrow funds. + References No definition available. + Details
Name: | kr_MultiemployerPlansAccruedPensionLiabilityAndPrepaidEscrowAfterTax
Namespace Prefix: | kr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The gross amount of multiemployer plans transition accrued pension liability and prepaid escrow funds. + References No definition available. + Details
Name: | kr_MultiemployerPlansAccruedPensionLiabilityAndPrepaidEscrowBeforeTax
Namespace Prefix: | kr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The period over which repayment of withdrawal and transition reserve commitment liability will be settled. + References No definition available. + Details
Name: | kr_MultiemployerPlansWithdrawalLiabilityAndTransitionReserveCommitmentLiabilityRepaymentPeriod
Namespace Prefix: | kr_
Data Type: | xbrli:durationItemType
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 No definition available. + Details
Name: | us-gaap_MultiemployerPlansLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |