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LEASES AND LEASE-FINANCED TRANSACTIONS - SUB LEASES (Details) $ in Millions	Nov. 09, 2019 USD ($)
LEASES AND LEASE-FINANCED TRANSACTIONS
Future minimum rentals under non-cancellable subleases	$ 308

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- 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