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v3.21.1

LEASES AND LEASE-FINANCED TRANSACTIONS - SUB LEASES (Details) $ in Millions | Jan. 30, 2021 USD ($)
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LEASES AND LEASE-FINANCED TRANSACTIONS |
Future minimum rentals under non-cancellable subleases | $ 261

X
- Definition Minimum payment receivable in the future under non-cancellable subleases. + References No definition available. + Details
Name: | kr_LesseeOperatingLeaseSubleasePaymentReceivable
Namespace Prefix: | kr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration