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ACCOUNTING POLICIES - SEGMENTS (Details) | 12 Months Ended
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Jan. 29, 2022 segment
ACCOUNTING POLICIES |
Company's retail operations (as a percent) | 97.00%
Number of segments | 1

X
- Definition This element represents the percentage of sales and EBITDA for its only reportable segment to total sales. + References No definition available. + Details
Name: | kr_CompanyRetailOperationPercentOfSales
Namespace Prefix: | kr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration