LEASES AND LEASE-FINANCED TRANSACTIONS - SUB LEASES (Details) $ in Millions	Feb. 01, 2020 USD ($)
LEASES AND LEASE-FINANCED TRANSACTIONS
Future minimum rentals under non-cancellable subleases	$ 296

Minimum payment receivable in the future under non-cancellable subleases.

No definition available.

Name:	kr_LesseeOperatingLeaseSubleasePaymentReceivable
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant