<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.24.1.1.u2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>501</ContextCount>
  <ElementCount>527</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>128</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>11</UnitCount>
  <MyReports>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0000003 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/CONSOLIDATEDBALANCESHEETS</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0000004 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/CONSOLIDATEDBALANCESHEETSParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0000005 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0000006 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0000007 - Statement - CONSOLIDATED STATEMENTS OF REDEEMABLE NONCONTROLLING INTEREST AND SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/CONSOLIDATEDSTATEMENTSOFREDEEMABLENONCONTROLLINGINTERESTANDSHAREHOLDERSEQUITY</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF REDEEMABLE NONCONTROLLING INTEREST AND SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0000008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0000009 - Disclosure - ORGANIZATION OF THE COMPANY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/ORGANIZATIONOFTHECOMPANY</Role>
      <ShortName>ORGANIZATION OF THE COMPANY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0000010 - Disclosure - SUMMARY OF ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0000011 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/LEASES</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0000012 - Disclosure - REVENUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/REVENUE</Role>
      <ShortName>REVENUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0000013 - Disclosure - SHARE-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREBASEDCOMPENSATION</Role>
      <ShortName>SHARE-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0000014 - Disclosure - EARNINGS PER SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/EARNINGSPERSHARE</Role>
      <ShortName>EARNINGS PER SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0000015 - Disclosure - DISCONTINUED OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/DISCONTINUEDOPERATIONS</Role>
      <ShortName>DISCONTINUED OPERATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0000016 - Disclosure - SUPPLEMENTAL CASH FLOW DISCLOSURES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUPPLEMENTALCASHFLOWDISCLOSURES</Role>
      <ShortName>SUPPLEMENTAL CASH FLOW DISCLOSURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0000017 - Disclosure - BANK BORROWINGS AND LONG-TERM DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/BANKBORROWINGSANDLONGTERMDEBT</Role>
      <ShortName>BANK BORROWINGS AND LONG-TERM DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0000018 - Disclosure - FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FINANCIALINSTRUMENTS</Role>
      <ShortName>FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0000019 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSS</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>0000020 - Disclosure - TRADE RECEIVABLES SALES PROGRAM</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/TRADERECEIVABLESSALESPROGRAM</Role>
      <ShortName>TRADE RECEIVABLES SALES PROGRAM</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>0000021 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIES</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>0000022 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/COMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>0000023 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXES</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>0000024 - Disclosure - RESTRUCTURING CHARGES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/RESTRUCTURINGCHARGES</Role>
      <ShortName>RESTRUCTURING CHARGES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>0000025 - Disclosure - OTHER CHARGES (INCOME), NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/OTHERCHARGESINCOMENET</Role>
      <ShortName>OTHER CHARGES (INCOME), NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>0000026 - Disclosure - INTEREST EXPENSE AND INTEREST INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INTERESTEXPENSEANDINTERESTINCOME</Role>
      <ShortName>INTEREST EXPENSE AND INTEREST INCOME</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>0000027 - Disclosure - BUSINESS AND ASSET ACQUISITIONS &amp; DIVESTITURES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/BUSINESSANDASSETACQUISITIONSDIVESTITURES</Role>
      <ShortName>BUSINESS AND ASSET ACQUISITIONS &amp; DIVESTITURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>0000028 - Disclosure - SHARE REPURCHASE PLAN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREREPURCHASEPLAN</Role>
      <ShortName>SHARE REPURCHASE PLAN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>0000029 - Disclosure - SEGMENT REPORTING</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTING</Role>
      <ShortName>SEGMENT REPORTING</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>0000030 - Disclosure - NONCONTROLLING INTEREST</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/NONCONTROLLINGINTEREST</Role>
      <ShortName>NONCONTROLLING INTEREST</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>0000031 - Disclosure - QUARTERLY FINANCIAL DATA (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/QUARTERLYFINANCIALDATAUNAUDITED</Role>
      <ShortName>QUARTERLY FINANCIAL DATA (UNAUDITED)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.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>32</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.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>33</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.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>34</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9954471 - Disclosure - SUMMARY OF ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9954472 - Disclosure - SUMMARY OF ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESTables</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIES</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9954473 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/LEASESTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/LEASES</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9954474 - Disclosure - REVENUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/REVENUETables</Role>
      <ShortName>REVENUE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/REVENUE</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9954475 - Disclosure - SHARE-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREBASEDCOMPENSATIONTables</Role>
      <ShortName>SHARE-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/SHAREBASEDCOMPENSATION</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9954476 - Disclosure - EARNINGS PER SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/EARNINGSPERSHARETables</Role>
      <ShortName>EARNINGS PER SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/EARNINGSPERSHARE</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9954477 - Disclosure - DISCONTINUED OPERATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/DISCONTINUEDOPERATIONSTables</Role>
      <ShortName>DISCONTINUED OPERATIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/DISCONTINUEDOPERATIONS</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9954478 - Disclosure - SUPPLEMENTAL CASH FLOW DISCLOSURES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUPPLEMENTALCASHFLOWDISCLOSURESTables</Role>
      <ShortName>SUPPLEMENTAL CASH FLOW DISCLOSURES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/SUPPLEMENTALCASHFLOWDISCLOSURES</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9954479 - Disclosure - BANK BORROWINGS AND LONG-TERM DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/BANKBORROWINGSANDLONGTERMDEBTTables</Role>
      <ShortName>BANK BORROWINGS AND LONG-TERM DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/BANKBORROWINGSANDLONGTERMDEBT</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9954480 - Disclosure - FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FINANCIALINSTRUMENTSTables</Role>
      <ShortName>FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/FINANCIALINSTRUMENTS</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9954481 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSSTables</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSS</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9954482 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESTables</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIES</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9954483 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/INCOMETAXES</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9954484 - Disclosure - RESTRUCTURING CHARGES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/RESTRUCTURINGCHARGESTables</Role>
      <ShortName>RESTRUCTURING CHARGES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/RESTRUCTURINGCHARGES</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9954485 - Disclosure - OTHER CHARGES (INCOME), NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/OTHERCHARGESINCOMENETTables</Role>
      <ShortName>OTHER CHARGES (INCOME), NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/OTHERCHARGESINCOMENET</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9954486 - Disclosure - INTEREST EXPENSE AND INTEREST INCOME (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INTERESTEXPENSEANDINTERESTINCOMETables</Role>
      <ShortName>INTEREST EXPENSE AND INTEREST INCOME (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/INTERESTEXPENSEANDINTERESTINCOME</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9954487 - Disclosure - SEGMENT REPORTING (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGTables</Role>
      <ShortName>SEGMENT REPORTING (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/SEGMENTREPORTING</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9954488 - Disclosure - QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/QUARTERLYFINANCIALDATAUNAUDITEDTables</Role>
      <ShortName>QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.flex.com/role/QUARTERLYFINANCIALDATAUNAUDITED</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9954489 - Disclosure - ORGANIZATION OF THE COMPANY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/ORGANIZATIONOFTHECOMPANYDetails</Role>
      <ShortName>ORGANIZATION OF THE COMPANY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/ORGANIZATIONOFTHECOMPANY</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9954490 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Concentration of Credit Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESConcentrationofCreditRiskDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Concentration of Credit Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9954491 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Cash and Cash Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESCashandCashEquivalentsDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Cash and Cash Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9954492 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESInventoriesDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9954493 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Property and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESPropertyandEquipmentNetDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Property and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9954494 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESGoodwillDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9954495 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESIntangibleAssetsDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9954496 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESInvestmentsDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9954497 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Customer Working Capital Advances and Other Current Assets/Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESCustomerWorkingCapitalAdvancesandOtherCurrentAssetsLiabilitiesDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Customer Working Capital Advances and Other Current Assets/Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9954498 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESLeasesDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9954499 - Disclosure - SUMMARY OF ACCOUNTING POLICIES - Supplier Finance Program (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUMMARYOFACCOUNTINGPOLICIESSupplierFinanceProgramDetails</Role>
      <ShortName>SUMMARY OF ACCOUNTING POLICIES - Supplier Finance Program (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9954500 - Disclosure - LEASES - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/LEASESAdditionalInformationDetails</Role>
      <ShortName>LEASES - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9954501 - Disclosure - LEASES - Lease Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/LEASESLeaseCostDetails</Role>
      <ShortName>LEASES - Lease Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9954502 - Disclosure - LEASES - Supplemental Balance Sheet Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/LEASESSupplementalBalanceSheetInformationDetails</Role>
      <ShortName>LEASES - Supplemental Balance Sheet Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9954503 - Disclosure - LEASES - Supplemental Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/LEASESSupplementalCashFlowInformationDetails</Role>
      <ShortName>LEASES - Supplemental Cash Flow Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9954504 - Disclosure - LEASES - Future Minimum Lease Payments Under Noncancellable Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/LEASESFutureMinimumLeasePaymentsUnderNoncancellableLeasesDetails</Role>
      <ShortName>LEASES - Future Minimum Lease Payments Under Noncancellable Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9954505 - Disclosure - REVENUE - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/REVENUEAdditionalInformationDetails</Role>
      <ShortName>REVENUE - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9954506 - Disclosure - REVENUE - Disaggregation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/REVENUEDisaggregationofRevenueDetails</Role>
      <ShortName>REVENUE - Disaggregation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9954507 - Disclosure - SHARE-BASED COMPENSATION - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREBASEDCOMPENSATIONAdditionalInformationDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9954508 - Disclosure - SHARE-BASED COMPENSATION - Allocated Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREBASEDCOMPENSATIONAllocatedExpenseDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Allocated Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9954509 - Disclosure - SHARE-BASED COMPENSATION - Fair Value Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREBASEDCOMPENSATIONFairValueAssumptionsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Fair Value Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9954510 - Disclosure - SHARE-BASED COMPENSATION - Summary of Company's Award Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREBASEDCOMPENSATIONSummaryofCompanysAwardActivityDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Summary of Company's Award Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9954511 - Disclosure - SHARE-BASED COMPENSATION - Equity Awards with Market Conditions or Performance Conditions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREBASEDCOMPENSATIONEquityAwardswithMarketConditionsorPerformanceConditionsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Equity Awards with Market Conditions or Performance Conditions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9954512 - Disclosure - EARNINGS PER SHARE - Weighted Average Shares used to Calculate EPS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/EARNINGSPERSHAREWeightedAverageSharesusedtoCalculateEPSDetails</Role>
      <ShortName>EARNINGS PER SHARE - Weighted Average Shares used to Calculate EPS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9954513 - Disclosure - DISCONTINUED OPERATIONS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/DISCONTINUEDOPERATIONSAdditionalInformationDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9954514 - Disclosure - DISCONTINUED OPERATIONS - Income Statement Disclosures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/DISCONTINUEDOPERATIONSIncomeStatementDisclosuresDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS - Income Statement Disclosures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9954515 - Disclosure - DISCONTINUED OPERATIONS - Cash Flow Statement Disclosures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/DISCONTINUEDOPERATIONSCashFlowStatementDisclosuresDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS - Cash Flow Statement Disclosures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9954516 - Disclosure - DISCONTINUED OPERATIONS - Balance Sheet Disclosures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/DISCONTINUEDOPERATIONSBalanceSheetDisclosuresDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS - Balance Sheet Disclosures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9954517 - Disclosure - SUPPLEMENTAL CASH FLOW DISCLOSURES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SUPPLEMENTALCASHFLOWDISCLOSURESDetails</Role>
      <ShortName>SUPPLEMENTAL CASH FLOW DISCLOSURES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/SUPPLEMENTALCASHFLOWDISCLOSURESTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9954518 - Disclosure - BANK BORROWINGS AND LONG-TERM DEBT - Borrowings Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/BANKBORROWINGSANDLONGTERMDEBTBorrowingsOutstandingDetails</Role>
      <ShortName>BANK BORROWINGS AND LONG-TERM DEBT - Borrowings Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9954519 - Disclosure - BANK BORROWINGS AND LONG-TERM DEBT - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/BANKBORROWINGSANDLONGTERMDEBTAdditionalInformationDetails</Role>
      <ShortName>BANK BORROWINGS AND LONG-TERM DEBT - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9954520 - Disclosure - BANK BORROWINGS AND LONG-TERM DEBT - Repayments of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/BANKBORROWINGSANDLONGTERMDEBTRepaymentsofDebtDetails</Role>
      <ShortName>BANK BORROWINGS AND LONG-TERM DEBT - Repayments of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9954521 - Disclosure - FINANCIAL INSTRUMENTS - Notional Amount (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FINANCIALINSTRUMENTSNotionalAmountDetails</Role>
      <ShortName>FINANCIAL INSTRUMENTS - Notional Amount (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9954522 - Disclosure - FINANCIAL INSTRUMENTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FINANCIALINSTRUMENTSNarrativeDetails</Role>
      <ShortName>FINANCIAL INSTRUMENTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9954523 - Disclosure - FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FINANCIALINSTRUMENTSFairValueofDerivativeInstrumentsDetails</Role>
      <ShortName>FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9954524 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in Accumulated Other Comprehensive Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSSChangesinAccumulatedOtherComprehensiveLossDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in Accumulated Other Comprehensive Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9954525 - Disclosure - TRADE RECEIVABLES SALES PROGRAM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/TRADERECEIVABLESSALESPROGRAMDetails</Role>
      <ShortName>TRADE RECEIVABLES SALES PROGRAM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/TRADERECEIVABLESSALESPROGRAM</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9954526 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Assets and Liabilities Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESAssetsandLiabilitiesMeasuredatFairValueDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Assets and Liabilities Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9954527 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Debt Not Carried at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESDebtNotCarriedatFairValueDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Debt Not Carried at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9954528 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/COMMITMENTSANDCONTINGENCIESDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/COMMITMENTSANDCONTINGENCIES</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9954529 - Disclosure - INCOME TAXES - Components of Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESComponentsofIncomeDetails</Role>
      <ShortName>INCOME TAXES - Components of Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9954530 - Disclosure - INCOME TAXES - Provision for Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESProvisionforIncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES - Provision for Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9954531 - Disclosure - INCOME TAXES - Reconciliation of Income Tax Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESReconciliationofIncomeTaxExpenseDetails</Role>
      <ShortName>INCOME TAXES - Reconciliation of Income Tax Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9954532 - Disclosure - INCOME TAXES - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESAdditionalInformationDetails</Role>
      <ShortName>INCOME TAXES - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9954533 - Disclosure - INCOME TAXES - Components of Deferred Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESComponentsofDeferredIncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES - Components of Deferred Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9954534 - Disclosure - INCOME TAXES - Tax Losses and Carryforward (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESTaxLossesandCarryforwardDetails</Role>
      <ShortName>INCOME TAXES - Tax Losses and Carryforward (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9954535 - Disclosure - INCOME TAXES - Reconciliation of Unrecognized Tax Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INCOMETAXESReconciliationofUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>INCOME TAXES - Reconciliation of Unrecognized Tax Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9954536 - Disclosure - RESTRUCTURING CHARGES - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/RESTRUCTURINGCHARGESAdditionalInformationDetails</Role>
      <ShortName>RESTRUCTURING CHARGES - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9954537 - Disclosure - RESTRUCTURING CHARGES - Provisions, Respective Payments and Remaining Accrued Balance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/RESTRUCTURINGCHARGESProvisionsRespectivePaymentsandRemainingAccruedBalanceDetails</Role>
      <ShortName>RESTRUCTURING CHARGES - Provisions, Respective Payments and Remaining Accrued Balance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9954538 - Disclosure - OTHER CHARGES (INCOME), NET Other Charges (Income) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/OTHERCHARGESINCOMENETOtherChargesIncomeDetails</Role>
      <ShortName>OTHER CHARGES (INCOME), NET Other Charges (Income) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/OTHERCHARGESINCOMENETTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9954539 - Disclosure - INTEREST EXPENSE AND INTEREST INCOME - Interest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/INTERESTEXPENSEANDINTERESTINCOMEInterestDetails</Role>
      <ShortName>INTEREST EXPENSE AND INTEREST INCOME - Interest (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9954540 - Disclosure - BUSINESS AND ASSET ACQUISITIONS &amp; DIVESTITURES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/BUSINESSANDASSETACQUISITIONSDIVESTITURESDetails</Role>
      <ShortName>BUSINESS AND ASSET ACQUISITIONS &amp; DIVESTITURES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/BUSINESSANDASSETACQUISITIONSDIVESTITURES</ParentRole>
      <Position>104</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9954541 - Disclosure - SHARE REPURCHASE PLAN (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SHAREREPURCHASEPLANDetails</Role>
      <ShortName>SHARE REPURCHASE PLAN (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/SHAREREPURCHASEPLAN</ParentRole>
      <Position>105</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9954542 - Disclosure - SEGMENT REPORTING - Narratives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGNarrativesDetails</Role>
      <ShortName>SEGMENT REPORTING - Narratives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9954543 - Disclosure - SEGMENT REPORTING - Comparative Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGComparativeInformationDetails</Role>
      <ShortName>SEGMENT REPORTING - Comparative Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9954544 - Disclosure - SEGMENT REPORTING - Depreciation Expense Included in Operating Performance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGDepreciationExpenseIncludedinOperatingPerformanceDetails</Role>
      <ShortName>SEGMENT REPORTING - Depreciation Expense Included in Operating Performance (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>9954545 - Disclosure - SEGMENT REPORTING - Geographic Information of Net Sales (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGGeographicInformationofNetSalesDetails</Role>
      <ShortName>SEGMENT REPORTING - Geographic Information of Net Sales (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>9954546 - Disclosure - SEGMENT REPORTING - Geographic Information of Net Sales (Countries Accounting for More Than 10% of Net Sales) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGGeographicInformationofNetSalesCountriesAccountingforMoreThan10ofNetSalesDetails</Role>
      <ShortName>SEGMENT REPORTING - Geographic Information of Net Sales (Countries Accounting for More Than 10% of Net Sales) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>9954547 - Disclosure - SEGMENT REPORTING - Geographic Information of Property, Plant and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGGeographicInformationofPropertyPlantandEquipmentDetails</Role>
      <ShortName>SEGMENT REPORTING - Geographic Information of Property, Plant and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>9954548 - Disclosure - SEGMENT REPORTING - Geographic Information of Property, Plant and Equipment (Countries Accounting for More Than 10% of Net Property, Plant and Equipment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/SEGMENTREPORTINGGeographicInformationofPropertyPlantandEquipmentCountriesAccountingforMoreThan10ofNetPropertyPlantandEquipmentDetails</Role>
      <ShortName>SEGMENT REPORTING - Geographic Information of Property, Plant and Equipment (Countries Accounting for More Than 10% of Net Property, Plant and Equipment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>9954549 - Disclosure - NONCONTROLLING INTEREST (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/NONCONTROLLINGINTERESTDetails</Role>
      <ShortName>NONCONTROLLING INTEREST (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/NONCONTROLLINGINTEREST</ParentRole>
      <Position>113</Position>
    </Report>
    <Report instance="flex-20240331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>9954550 - Disclosure - QUARTERLY FINANCIAL DATA (UNAUDITED) Unaudited Quarterly Financial Data (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.flex.com/role/QUARTERLYFINANCIALDATAUNAUDITEDUnauditedQuarterlyFinancialDataDetails</Role>
      <ShortName>QUARTERLY FINANCIAL DATA (UNAUDITED) Unaudited Quarterly Financial Data (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.flex.com/role/QUARTERLYFINANCIALDATAUNAUDITEDTables</ParentRole>
      <Position>114</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[dq-60547-EntityTaxIdentificationNumber-Missing] Submission type 10-K should have a non-empty value for EntityTaxIdentificationNumber in the Required Context. flex-20240331.htm </Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 2 fact(s) appearing in ix:hidden were eligible for transformation: ecd:TrdArrDuration, us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 -  flex-20240331.htm 4</Log>
  </Logs>
  <InputFiles>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="flex-20240331.htm">flex-20240331.htm</File>
    <File>flex-20240331.xsd</File>
    <File>flex-20240331_cal.xml</File>
    <File>flex-20240331_def.xml</File>
    <File>flex-20240331_lab.xml</File>
    <File>flex-20240331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>flex-20240331_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1578">http://fasb.org/us-gaap/2023</BaseTaxonomy>
    <BaseTaxonomy items="37">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
    <BaseTaxonomy items="11">http://xbrl.sec.gov/ecd/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
