<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>402</ContextCount>
  <ElementCount>665</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>136</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>14</UnitCount>
  <MyReports>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995200090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995200100 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995200105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995200200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedStatementsOfOperations</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995200300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995200305 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995200400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995200500 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedStatementOfChangesInShareholdersEquity</Role>
      <ShortName>CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995200505 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREOWNERS' EQUITY (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/StatementConsolidatedStatementsOfChangesInShareownersEquityParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN SHAREOWNERS' EQUITY (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995210101 - Disclosure - ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPolicies</Role>
      <ShortName>ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995210201 - Disclosure - GOODWILL AND INTANGIBLE ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureGoodwillAndIntangibleAssets</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995210301 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosurePropertyPlantAndEquipmentNet</Role>
      <ShortName>PROPERTY, PLANT AND EQUIPMENT, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210401 - Disclosure - TAXES BASED ON INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncome</Role>
      <ShortName>TAXES BASED ON INCOME</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995210501 - Disclosure - DEBT OBLIGATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureDebtObligations</Role>
      <ShortName>DEBT OBLIGATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995210601 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureDerivativeFinancialInstruments</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995210701 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995210801 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLoss</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995210901 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactions</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995211001 - Disclosure - EARNINGS PER COMMON SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureEarningsPerCommonShare</Role>
      <ShortName>EARNINGS PER COMMON SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995211101 - Disclosure - STOCK-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureStockBasedCompensation</Role>
      <ShortName>STOCK-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995211201 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995211301 - Disclosure - STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureStock</Role>
      <ShortName>STOCK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995211401 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlans</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995211501 - Disclosure - MULTI-EMPLOYER PENSION PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureMultiEmployerPensionPlans</Role>
      <ShortName>MULTI-EMPLOYER PENSION PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995211601 - Disclosure - SEGMENT REPORTING</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureSegmentReporting</Role>
      <ShortName>SEGMENT REPORTING</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995211701 - Disclosure - SALE OF KROGER SPECIALTY PHARMACY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureSaleOfKrogerSpecialtyPharmacy</Role>
      <ShortName>SALE OF KROGER SPECIALTY PHARMACY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995211801 - Disclosure - TERMINATION OF MERGER WITH ALBERTSONS COMPANIES, INC.</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTerminationOfMergerWithAlbertsonsCompaniesInc</Role>
      <ShortName>TERMINATION OF MERGER WITH ALBERTSONS COMPANIES, INC.</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995211901 - Disclosure - FULFILLMENT NETWORK ASSET IMPAIRMENT AND RELATED CHARGES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureFulfillmentNetworkAssetImpairmentAndRelatedCharges</Role>
      <ShortName>FULFILLMENT NETWORK ASSET IMPAIRMENT AND RELATED CHARGES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995212001 - Disclosure - RECENTLY ADOPTED ACCOUNTING STANDARDS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureRecentlyAdoptedAccountingStandards</Role>
      <ShortName>RECENTLY ADOPTED ACCOUNTING STANDARDS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995212101 - Disclosure - RECENTLY ISSUED ACCOUNTING STANDARDS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureRecentlyIssuedAccountingStandards</Role>
      <ShortName>RECENTLY ISSUED ACCOUNTING STANDARDS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>99920102 - Disclosure - ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesPolicies</Role>
      <ShortName>ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>99930103 - Disclosure - ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesTables</Role>
      <ShortName>ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureAccountingPolicies</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>99930203 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureGoodwillAndIntangibleAssetsTables</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureGoodwillAndIntangibleAssets</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>99930303 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosurePropertyPlantAndEquipmentNetTables</Role>
      <ShortName>PROPERTY, PLANT AND EQUIPMENT, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosurePropertyPlantAndEquipmentNet</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>99930403 - Disclosure - TAXES BASED ON INCOME (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncomeTables</Role>
      <ShortName>TAXES BASED ON INCOME (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureTaxesBasedOnIncome</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>99930503 - Disclosure - DEBT OBLIGATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureDebtObligationsTables</Role>
      <ShortName>DEBT OBLIGATIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureDebtObligations</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>99930603 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureDerivativeFinancialInstrumentsTables</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureDerivativeFinancialInstruments</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>99930703 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>99930803 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossTables</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLoss</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>99930903 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsTables</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactions</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>99931003 - Disclosure - EARNINGS PER COMMON SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureEarningsPerCommonShareTables</Role>
      <ShortName>EARNINGS PER COMMON SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureEarningsPerCommonShare</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>99931103 - Disclosure - STOCK-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureStockBasedCompensationTables</Role>
      <ShortName>STOCK-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureStockBasedCompensation</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>99931403 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansTables</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlans</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>99931503 - Disclosure - MULTI-EMPLOYER PENSION PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureMultiEmployerPensionPlansTables</Role>
      <ShortName>MULTI-EMPLOYER PENSION PLANS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureMultiEmployerPensionPlans</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>99931603 - Disclosure - SEGMENT REPORTING (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureSegmentReportingTables</Role>
      <ShortName>SEGMENT REPORTING (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureSegmentReporting</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>99940101 - Disclosure - ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesDetails</Role>
      <ShortName>ACCOUNTING POLICIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureAccountingPoliciesTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>99940102 - Disclosure - ACCOUNTING POLICIES - PROPERTY AND EQUIPMENT AND LONG-LIVED ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesPropertyAndEquipmentAndLongLivedAssetsDetails</Role>
      <ShortName>ACCOUNTING POLICIES - PROPERTY AND EQUIPMENT AND LONG-LIVED ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>99940103 - Disclosure - ACCOUNTING POLICIES - STOCK-BASED COMPENSATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesStockBasedCompensationDetails</Role>
      <ShortName>ACCOUNTING POLICIES - STOCK-BASED COMPENSATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>99940104 - Disclosure - ACCOUNTING POLICIES - SELF-INSURANCE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesSelfInsuranceDetails</Role>
      <ShortName>ACCOUNTING POLICIES - SELF-INSURANCE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>99940105 - Disclosure - ACCOUNTING POLICIES - REVENUE RECOGNITION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesRevenueRecognitionDetails</Role>
      <ShortName>ACCOUNTING POLICIES - REVENUE RECOGNITION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>99940106 - Disclosure - ACCOUNTING POLICIES - ADVERTISING (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccountingPoliciesAdvertisingDetails</Role>
      <ShortName>ACCOUNTING POLICIES - ADVERTISING (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>99940201 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureGoodwillAndIntangibleAssetsDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureGoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>99940202 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - INTANGIBLE ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureGoodwillAndIntangibleAssetsIntangibleAssetsDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - INTANGIBLE ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>99940301 - Disclosure - PROPERTY, PLANT AND EQUIPMENT, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosurePropertyPlantAndEquipmentNetDetails</Role>
      <ShortName>PROPERTY, PLANT AND EQUIPMENT, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosurePropertyPlantAndEquipmentNetTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>99940401 - Disclosure - TAXES BASED ON INCOME - COMPONENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncomeComponentsDetails</Role>
      <ShortName>TAXES BASED ON INCOME - COMPONENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>99940402 - Disclosure - TAXES BASED ON INCOME - EFFECTIVE INCOME TAX RATE RECONCILIATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncomeEffectiveIncomeTaxRateReconciliationDetails</Role>
      <ShortName>TAXES BASED ON INCOME - EFFECTIVE INCOME TAX RATE RECONCILIATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>99940403 - Disclosure - TAXES BASED ON INCOME - DEFERRED TAX BALANCES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncomeDeferredTaxBalancesDetails</Role>
      <ShortName>TAXES BASED ON INCOME - DEFERRED TAX BALANCES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>99940404 - Disclosure - TAXES BASED ON INCOME - NOLS AND CREDITS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncomeNolsAndCreditsDetails</Role>
      <ShortName>TAXES BASED ON INCOME - NOLS AND CREDITS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>99940405 - Disclosure - TAXES BASED ON INCOME - UNRECOGNIZED TAX BENEFITS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncomeUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>TAXES BASED ON INCOME - UNRECOGNIZED TAX BENEFITS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>99940406 - Disclosure - TAXES BASED ON INCOME -CASH PAID FOR INCOME TAXES, NET OF REFUNDS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTaxesBasedOnIncomeCashPaidForIncomeTaxesNetOfRefundsDetails</Role>
      <ShortName>TAXES BASED ON INCOME -CASH PAID FOR INCOME TAXES, NET OF REFUNDS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>99940501 - Disclosure - DEBT OBLIGATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureDebtObligationsDetails</Role>
      <ShortName>DEBT OBLIGATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureDebtObligationsTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>99940502 - Disclosure - DEBT OBLIGATIONS - MATURITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureDebtObligationsMaturitiesDetails</Role>
      <ShortName>DEBT OBLIGATIONS - MATURITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>99940601 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE INSTRUMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureDerivativeFinancialInstrumentsDerivativeInstrumentsDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE INSTRUMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>99940701 - Disclosure - FAIR VALUE MEASUREMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureFairValueMeasurementsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureFairValueMeasurementsTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>99940702 - Disclosure - FAIR VALUE MEASUREMENTS - OTHER ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureFairValueMeasurementsOtherAssetsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - OTHER ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>99940801 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - CHANGES IN AOCI BY COMPONENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossChangesInAociByComponentDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - CHANGES IN AOCI BY COMPONENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>99940802 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - ITEMS RECLASSIFIED OUT OF AOCI (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossItemsReclassifiedOutOfAociDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - ITEMS RECLASSIFIED OUT OF AOCI (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureAccumulatedOtherComprehensiveIncomeLossTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>99940901 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - NARRATIVE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsNarrativeDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - NARRATIVE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>99940902 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - BALANCE SHEET CLASSIFICATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsBalanceSheetClassificationDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - BALANCE SHEET CLASSIFICATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>99940903 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - LEASE COST (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsLeaseCostDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - LEASE COST (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>99940904 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - MATURITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsMaturitiesDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - MATURITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>99940905 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - SUB LEASES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsSubLeasesDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - SUB LEASES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>99940906 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - QUANTITATIVE INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsQuantitativeInformationDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - QUANTITATIVE INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>99940907 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - CASH FLOW INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsCashFlowInformationDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - CASH FLOW INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>99940908 - Disclosure - LEASES AND LEASE-FINANCED TRANSACTIONS - OCADO (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsOcadoDetails</Role>
      <ShortName>LEASES AND LEASE-FINANCED TRANSACTIONS - OCADO (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureLeasesAndLeaseFinancedTransactionsTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>99941001 - Disclosure - EARNINGS PER COMMON SHARE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureEarningsPerCommonShareDetails</Role>
      <ShortName>EARNINGS PER COMMON SHARE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureEarningsPerCommonShareTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>99941101 - Disclosure - STOCK-BASED COMPENSATION - STOCK OPTIONS AND RESTRICTED STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureStockBasedCompensationStockOptionsAndRestrictedStockDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - STOCK OPTIONS AND RESTRICTED STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>99941102 - Disclosure - STOCK-BASED COMPENSATION - COMPENSATION AND VALUE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureStockBasedCompensationCompensationAndValueDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - COMPENSATION AND VALUE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>99941201 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCommitmentsAndContingenciesDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>99941301 - Disclosure - STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureStockDetails</Role>
      <ShortName>STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>99941401 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS - AMOUNTS RECOGNIZED IN AOCI AND OTHER CHANGES IN OCI (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansAmountsRecognizedInAociAndOtherChangesInOciDetails</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS - AMOUNTS RECOGNIZED IN AOCI AND OTHER CHANGES IN OCI (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>99941402 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS - FUNDED STATUS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansFundedStatusDetails</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS - FUNDED STATUS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>99941403 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS - ASSUMPTIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansAssumptionsDetails</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS - ASSUMPTIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>99941404 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS - BENEFIT PAYMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansBenefitPaymentsDetails</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS - BENEFIT PAYMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>99941405 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS - FAIR VALUE OF PLAN ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansFairValueOfPlanAssetsDetails</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS - FAIR VALUE OF PLAN ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>99941406 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS - LEVEL 3 RECONCILIATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansLevel3ReconciliationDetails</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS - LEVEL 3 RECONCILIATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>99941407 - Disclosure - COMPANY- SPONSORED BENEFIT PLANS - DEFINED CONTRIBUTION PLAN INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureCompanySponsoredBenefitPlansDefinedContributionPlanInformationDetails</Role>
      <ShortName>COMPANY- SPONSORED BENEFIT PLANS - DEFINED CONTRIBUTION PLAN INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>99941501 - Disclosure - MULTI-EMPLOYER PENSION PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureMultiEmployerPensionPlansDetails</Role>
      <ShortName>MULTI-EMPLOYER PENSION PLANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureMultiEmployerPensionPlansTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>99941601 - Disclosure - SEGMENT REPORTING (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureSegmentReportingDetails</Role>
      <ShortName>SEGMENT REPORTING (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureSegmentReportingTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>99941602 - Disclosure - SEGMENT REPORTING - RETAIL OPERATIONS SEGMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureSegmentReportingRetailOperationsSegmentDetails</Role>
      <ShortName>SEGMENT REPORTING - RETAIL OPERATIONS SEGMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>99941701 - Disclosure - SALE OF KROGER SPECIALTY PHARMACY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureSaleOfKrogerSpecialtyPharmacyDetails</Role>
      <ShortName>SALE OF KROGER SPECIALTY PHARMACY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureSaleOfKrogerSpecialtyPharmacy</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>99941801 - Disclosure - TERMINATION OF THE MERGER WITH ALBERTSONS COMPANIES, INC. (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureTerminationOfMergerWithAlbertsonsCompaniesIncDetails</Role>
      <ShortName>TERMINATION OF THE MERGER WITH ALBERTSONS COMPANIES, INC. (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="kr-20260131x10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>99941901 - Disclosure - FULFILLMENT NETWORK ASSET IMPAIRMENT AND RELATED CHARGES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kroger.com/role/DisclosureFulfillmentNetworkAssetImpairmentAndRelatedChargesDetails</Role>
      <ShortName>FULFILLMENT NETWORK ASSET IMPAIRMENT AND RELATED CHARGES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kroger.com/role/DisclosureFulfillmentNetworkAssetImpairmentAndRelatedCharges</ParentRole>
      <Position>97</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>kr-20260131.xsd</File>
    <File>kr-20260131_cal.xml</File>
    <File>kr-20260131_def.xml</File>
    <File>kr-20260131_lab.xml</File>
    <File>kr-20260131_pre.xml</File>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="kr-20260131x10k.htm">kr-20260131x10k.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>kr-20260131x10k001.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="2">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="1523">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="39">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
