XML 33 R27.htm IDEA: XBRL DOCUMENT
v3.20.1

BENEFIT PLANS - MULTI EMPLOYER PLAN (Details) - Multi-employer pension funds - USD ($) $ in Millions | 4 Months Ended
--- | ---
May 23, 2020 | May 25, 2019
Multiemployer Plans |  |
Incremental contributions (before-tax) | $ 236 |
Incremental contributions (after-tax) | $ 180 |
Charge (before-tax) related to pension plan agreements |  | $ 59
Charge (after-tax) related to pension plan agreements |  | $ 44

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: | credit
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 amount of the after-tax charge of commitments and withdrawal liabilities associated with the restructuring of pension plan agreements. + References No definition available. + Details
Name: | kr_MultiemployerPlansCommitmentAndWithdrawalObligationAfterTax
Namespace Prefix: | kr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of the before-tax charge of commitments and withdrawal liabilities associated with the restructuring of pension plan agreements. + References No definition available. + Details
Name: | kr_MultiemployerPlansCommitmentAndWithdrawalObligationBeforeTax
Namespace Prefix: | kr_
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_MultiemployerPlansLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MultiemployerPlanTypeAxis=us-gaap_MultiemployerPlansPensionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |