<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>907</ContextCount>
  <ElementCount>669</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>245</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952151 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952152 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952153 - Statement - Consolidated Statements of Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/ConsolidatedStatementsofIncome</Role>
      <ShortName>Consolidated Statements of Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952154 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/ConsolidatedStatementsofComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952155 - Statement - Consolidated Statements of Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/ConsolidatedStatementsofEquity</Role>
      <ShortName>Consolidated Statements of Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952156 - Statement - Consolidated Statement of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/ConsolidatedStatementofCashFlows</Role>
      <ShortName>Consolidated Statement of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952157 - Disclosure - NATURE OF BUSINESS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/NATUREOFBUSINESS</Role>
      <ShortName>NATURE OF BUSINESS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - CASH, CASH EQUIVALENTS, RESTRICTED CASH AND CASH EQUIVALENTS AND INVESTMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/CASHCASHEQUIVALENTSRESTRICTEDCASHANDCASHEQUIVALENTSANDINVESTMENTS</Role>
      <ShortName>CASH, CASH EQUIVALENTS, RESTRICTED CASH AND CASH EQUIVALENTS AND INVESTMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - BALANCE SHEET COMPONENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTS</Role>
      <ShortName>BALANCE SHEET COMPONENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - LOANS RECEIVABLE, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENET</Role>
      <ShortName>LOANS RECEIVABLE, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - GOODWILL AND INTANGIBLE ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/GOODWILLANDINTANGIBLEASSETS</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - INTANGIBLE ASSETS AT FAIR VALUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INTANGIBLEASSETSATFAIRVALUE</Role>
      <ShortName>INTANGIBLE ASSETS AT FAIR VALUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - SEGMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTS</Role>
      <ShortName>SEGMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIES</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - COMMON STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/COMMONSTOCK</Role>
      <ShortName>COMMON STOCK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - REDEEMABLE CONVERTIBLE PREFERRED STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/REDEEMABLECONVERTIBLEPREFERREDSTOCK</Role>
      <ShortName>REDEEMABLE CONVERTIBLE PREFERRED STOCK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - EQUITY COMPENSATION PLAN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/EQUITYCOMPENSATIONPLAN</Role>
      <ShortName>EQUITY COMPENSATION PLAN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXES</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/COMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - LONG TERM RETENTION PROGRAM</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LONGTERMRETENTIONPROGRAM</Role>
      <ShortName>LONG TERM RETENTION PROGRAM</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSPAYABLEANDOTHERFINANCIALLIABILITIES</Role>
      <ShortName>LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/RELATEDPARTYTRANSACTIONS</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - CASH DIVIDEND DISTRIBUTION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/CASHDIVIDENDDISTRIBUTION</Role>
      <ShortName>CASH DIVIDEND DISTRIBUTION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - SECURITIZATION TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SECURITIZATIONTRANSACTIONS</Role>
      <ShortName>SECURITIZATION TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LEASES</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9952177 - Disclosure - DERIVATIVE INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTS</Role>
      <ShortName>DERIVATIVE INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.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>30</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.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>31</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.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>32</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - CASH, CASH EQUIVALENTS, RESTRICTED CASH AND CASH EQUIVALENTS AND INVESTMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/CASHCASHEQUIVALENTSRESTRICTEDCASHANDCASHEQUIVALENTSANDINVESTMENTSTables</Role>
      <ShortName>CASH, CASH EQUIVALENTS, RESTRICTED CASH AND CASH EQUIVALENTS AND INVESTMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/CASHCASHEQUIVALENTSRESTRICTEDCASHANDCASHEQUIVALENTSANDINVESTMENTS</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - BALANCE SHEET COMPONENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSTables</Role>
      <ShortName>BALANCE SHEET COMPONENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTS</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - LOANS RECEIVABLE, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENETTables</Role>
      <ShortName>LOANS RECEIVABLE, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/LOANSRECEIVABLENET</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/GOODWILLANDINTANGIBLEASSETSTables</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/GOODWILLANDINTANGIBLEASSETS</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - INTANGIBLE ASSETS AT FAIR VALUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INTANGIBLEASSETSATFAIRVALUETables</Role>
      <ShortName>INTANGIBLE ASSETS AT FAIR VALUE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/INTANGIBLEASSETSATFAIRVALUE</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - SEGMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTSTables</Role>
      <ShortName>SEGMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/SEGMENTS</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESTables</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIES</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/INCOMETAXES</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/COMMITMENTSANDCONTINGENCIESTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/COMMITMENTSANDCONTINGENCIES</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - LONG TERM RETENTION PROGRAM (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LONGTERMRETENTIONPROGRAMTables</Role>
      <ShortName>LONG TERM RETENTION PROGRAM (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/LONGTERMRETENTIONPROGRAM</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSPAYABLEANDOTHERFINANCIALLIABILITIESTables</Role>
      <ShortName>LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/LOANSPAYABLEANDOTHERFINANCIALLIABILITIES</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - SECURITIZATION TRANSACTIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SECURITIZATIONTRANSACTIONSTables</Role>
      <ShortName>SECURITIZATION TRANSACTIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/SECURITIZATIONTRANSACTIONS</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LEASESTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/LEASES</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - DERIVATIVE INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTSTables</Role>
      <ShortName>DERIVATIVE INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTS</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Revisions and Reclassifications of Previously Reported Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESSummaryofRevisionsandReclassificationsofPreviouslyReportedIncomeDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Revisions and Reclassifications of Previously Reported Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Reclassifications of Previously Reported Segment Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESSummaryofReclassificationsofPreviouslyReportedSegmentInformationDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Reclassifications of Previously Reported Segment Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - CASH, CASH EQUIVALENTS, RESTRICTED CASH AND CASH EQUIVALENTS AND INVESTMENTS - Summary of Composition of Cash, Cash Equivalents, Restricted Cash and Cash Equivalents, Short-term and Long-term Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/CASHCASHEQUIVALENTSRESTRICTEDCASHANDCASHEQUIVALENTSANDINVESTMENTSSummaryofCompositionofCashCashEquivalentsRestrictedCashandCashEquivalentsShorttermandLongtermInvestmentsDetails</Role>
      <ShortName>CASH, CASH EQUIVALENTS, RESTRICTED CASH AND CASH EQUIVALENTS AND INVESTMENTS - Summary of Composition of Cash, Cash Equivalents, Restricted Cash and Cash Equivalents, Short-term and Long-term Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Accounts Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofAccountsReceivableNetDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Accounts Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Allowance For Doubtful Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Allowance For Doubtful Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Credit Card Receivables and Other Means of Payments, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofCreditCardReceivablesandOtherMeansofPaymentsNetDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Credit Card Receivables and Other Means of Payments, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Allowance for Doubtful Accounts and Allowance for Chargebacks (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofAllowanceforDoubtfulAccountsandAllowanceforChargebacksDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Allowance for Doubtful Accounts and Allowance for Chargebacks (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Current Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofCurrentOtherAssetsDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Current Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Noncurrent Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofNoncurrentOtherAssetsDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Noncurrent Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Property And Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofPropertyAndEquipmentNetDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Property And Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Depreciation and Amortization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofDepreciationandAmortizationDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Depreciation and Amortization (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Current Other Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofCurrentOtherLiabilitiesDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Current Other Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Noncurrent Other Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofNoncurrentOtherLiabilitiesDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Noncurrent Other Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - BALANCE SHEET COMPONENTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSNarrativeDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Supplier Finance Program (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofSupplierFinanceProgramDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Supplier Finance Program (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Foreign Currency Translation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/BALANCESHEETCOMPONENTSScheduleofForeignCurrencyTranslationDetails</Role>
      <ShortName>BALANCE SHEET COMPONENTS - Schedule of Foreign Currency Translation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - LOANS RECEIVABLE, NET - Summary of Current Loans Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENETSummaryofCurrentLoansReceivableNetDetails</Role>
      <ShortName>LOANS RECEIVABLE, NET - Summary of Current Loans Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - LOANS RECEIVABLE, NET - Summary of Non Current Loans Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENETSummaryofNonCurrentLoansReceivableNetDetails</Role>
      <ShortName>LOANS RECEIVABLE, NET - Summary of Non Current Loans Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - LOANS RECEIVABLE, NET - Summary of Loans Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENETSummaryofLoansReceivableNetDetails</Role>
      <ShortName>LOANS RECEIVABLE, NET - Summary of Loans Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - LOANS RECEIVABLE, NET - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENETNarrativeDetails</Role>
      <ShortName>LOANS RECEIVABLE, NET - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - LOANS RECEIVABLE, NET - Schedule of Allowance for Doubtful Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENETScheduleofAllowanceforDoubtfulAccountsDetails</Role>
      <ShortName>LOANS RECEIVABLE, NET - Schedule of Allowance for Doubtful Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - LOANS RECEIVABLE, NET - Schedule of Credit Quality Analysis Of Loans Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSRECEIVABLENETScheduleofCreditQualityAnalysisOfLoansReceivablesDetails</Role>
      <ShortName>LOANS RECEIVABLE, NET - Schedule of Credit Quality Analysis Of Loans Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Composition of Goodwill and Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/GOODWILLANDINTANGIBLEASSETSCompositionofGoodwillandIntangibleAssetsDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Composition of Goodwill and Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Changes In Carrying Amount of Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/GOODWILLANDINTANGIBLEASSETSScheduleofChangesInCarryingAmountofGoodwillDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Schedule of Changes In Carrying Amount of Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/GOODWILLANDINTANGIBLEASSETSNarrativeDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Summary of Expected Intangible Asset Amortization Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/GOODWILLANDINTANGIBLEASSETSSummaryofExpectedIntangibleAssetAmortizationExpenseDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS - Summary of Expected Intangible Asset Amortization Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - INTANGIBLE ASSETS AT FAIR VALUE - Summary of Crypto Asset Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INTANGIBLEASSETSATFAIRVALUESummaryofCryptoAssetInformationDetails</Role>
      <ShortName>INTANGIBLE ASSETS AT FAIR VALUE - Summary of Crypto Asset Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - INTANGIBLE ASSETS AT FAIR VALUE - Summary of Crypto Asset Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INTANGIBLEASSETSATFAIRVALUESummaryofCryptoAssetActivityDetails</Role>
      <ShortName>INTANGIBLE ASSETS AT FAIR VALUE - Summary of Crypto Asset Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - SEGMENTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTSNarrativeDetails</Role>
      <ShortName>SEGMENTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - SEGMENTS - Summary of Financial Performance of Company's Reporting Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTSSummaryofFinancialPerformanceofCompanysReportingSegmentsDetails</Role>
      <ShortName>SEGMENTS - Summary of Financial Performance of Company's Reporting Segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - SEGMENTS - Summary of Consolidated Net Revenues by Similar Products and Services (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTSSummaryofConsolidatedNetRevenuesbySimilarProductsandServicesDetails</Role>
      <ShortName>SEGMENTS - Summary of Consolidated Net Revenues by Similar Products and Services (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - SEGMENTS - Summary of Allocation of Property and Equipment Based on Geography (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTSSummaryofAllocationofPropertyandEquipmentBasedonGeographyDetails</Role>
      <ShortName>SEGMENTS - Summary of Allocation of Property and Equipment Based on Geography (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - SEGMENTS - Summary of Allocation of Right of Use Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTSSummaryofAllocationofRightofUseAssetsDetails</Role>
      <ShortName>SEGMENTS - Summary of Allocation of Right of Use Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - SEGMENTS - Summary of Allocation of Goodwill and Intangible Assets Based on Geography (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SEGMENTSSummaryofAllocationofGoodwillandIntangibleAssetsBasedonGeographyDetails</Role>
      <ShortName>SEGMENTS - Summary of Allocation of Goodwill and Intangible Assets Based on Geography (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Summary of Assets and Liabilities Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Summary of Assets and Liabilities Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESNarrativeDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Summary of Debt Securities Classified as Available for Sale (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESSummaryofDebtSecuritiesClassifiedasAvailableforSaleDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Summary of Debt Securities Classified as Available for Sale (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Summary of Debt Securities Classified as Held to Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESSummaryofDebtSecuritiesClassifiedasHeldtoMaturityDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Summary of Debt Securities Classified as Held to Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Fair Value Of Financial Assets And Liabilities Measured At Amortized Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/FAIRVALUEMEASUREMENTOFASSETSANDLIABILITIESFairValueOfFinancialAssetsAndLiabilitiesMeasuredAtAmortizedCostDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Fair Value Of Financial Assets And Liabilities Measured At Amortized Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - COMMON STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/COMMONSTOCKDetails</Role>
      <ShortName>COMMON STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/COMMONSTOCK</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - REDEEMABLE CONVERTIBLE PREFERRED STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/REDEEMABLECONVERTIBLEPREFERREDSTOCKDetails</Role>
      <ShortName>REDEEMABLE CONVERTIBLE PREFERRED STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/REDEEMABLECONVERTIBLEPREFERREDSTOCK</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - EQUITY COMPENSATION PLAN (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/EQUITYCOMPENSATIONPLANDetails</Role>
      <ShortName>EQUITY COMPENSATION PLAN (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/EQUITYCOMPENSATIONPLAN</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - INCOME TAXES - Summary of Components of Income Tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESSummaryofComponentsofIncomeTaxDetails</Role>
      <ShortName>INCOME TAXES - Summary of Components of Income Tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - INCOME TAXES - Schedule of Components of Pretax Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESScheduleofComponentsofPretaxIncomeDetails</Role>
      <ShortName>INCOME TAXES - Schedule of Components of Pretax Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - INCOME TAXES - Summary of Income Tax Cash Paid (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESSummaryofIncomeTaxCashPaidDetails</Role>
      <ShortName>INCOME TAXES - Summary of Income Tax Cash Paid (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - INCOME TAXES - Summary of Income Tax Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESSummaryofIncomeTaxReconciliationDetails</Role>
      <ShortName>INCOME TAXES - Summary of Income Tax Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - INCOME TAXES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESNarrativeDetails</Role>
      <ShortName>INCOME TAXES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - INCOME TAXES - Summary of Composition of Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESSummaryofCompositionofDeferredTaxAssetsandLiabilitiesDetails</Role>
      <ShortName>INCOME TAXES - Summary of Composition of Deferred Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - INCOME TAXES - Summary of Tax Valuation Allowance Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESSummaryofTaxValuationAllowanceActivityDetails</Role>
      <ShortName>INCOME TAXES - Summary of Tax Valuation Allowance Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - INCOME TAXES - Summary of Tax Loss Carryforwards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/INCOMETAXESSummaryofTaxLossCarryforwardsDetails</Role>
      <ShortName>INCOME TAXES - Summary of Tax Loss Carryforwards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/COMMITMENTSANDCONTINGENCIESNarrativeDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - COMMITMENTS AND CONTINGENCIES - Schedule of Contingencies Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/COMMITMENTSANDCONTINGENCIESScheduleofContingenciesActivityDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Schedule of Contingencies Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - LONG TERM RETENTION PROGRAM - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LONGTERMRETENTIONPROGRAMNarrativeDetails</Role>
      <ShortName>LONG TERM RETENTION PROGRAM - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - LONG TERM RETENTION PROGRAM - Summary of Outstanding Long Term Retention Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LONGTERMRETENTIONPROGRAMSummaryofOutstandingLongTermRetentionPlansDetails</Role>
      <ShortName>LONG TERM RETENTION PROGRAM - Summary of Outstanding Long Term Retention Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - LONG TERM RETENTION PROGRAM - Summary of Long Term Retention Program Accrued Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LONGTERMRETENTIONPROGRAMSummaryofLongTermRetentionProgramAccruedCompensationExpenseDetails</Role>
      <ShortName>LONG TERM RETENTION PROGRAM - Summary of Long Term Retention Program Accrued Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES - Summary of Current and Non-Current Loans Payable and Other Financial Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSPAYABLEANDOTHERFINANCIALLIABILITIESSummaryofCurrentandNonCurrentLoansPayableandOtherFinancialLiabilitiesDetails</Role>
      <ShortName>LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES - Summary of Current and Non-Current Loans Payable and Other Financial Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES - Summary Of Loans Payable And Other Financial Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSPAYABLEANDOTHERFINANCIALLIABILITIESSummaryOfLoansPayableAndOtherFinancialLiabilitiesDetails</Role>
      <ShortName>LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES - Summary Of Loans Payable And Other Financial Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LOANSPAYABLEANDOTHERFINANCIALLIABILITIESNarrativeDetails</Role>
      <ShortName>LOANS PAYABLE AND OTHER FINANCIAL LIABILITIES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - RELATED PARTY TRANSACTIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/RELATEDPARTYTRANSACTIONSDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mercadolibre.com/role/RELATEDPARTYTRANSACTIONS</ParentRole>
      <Position>108</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - SECURITIZATION TRANSACTIONS - Summary of Collateralized Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SECURITIZATIONTRANSACTIONSSummaryofCollateralizedDebtDetails</Role>
      <ShortName>SECURITIZATION TRANSACTIONS - Summary of Collateralized Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - SECURITIZATION TRANSACTIONS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SECURITIZATIONTRANSACTIONSNarrativeDetails</Role>
      <ShortName>SECURITIZATION TRANSACTIONS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>9955589 - Disclosure - SECURITIZATION TRANSACTIONS - Summary of Assets and Liabilities of the Trust (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/SECURITIZATIONTRANSACTIONSSummaryofAssetsandLiabilitiesoftheTrustDetails</Role>
      <ShortName>SECURITIZATION TRANSACTIONS - Summary of Assets and Liabilities of the Trust (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>9955590 - Disclosure - LEASES - Summary of Supplemental Balance Sheet Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LEASESSummaryofSupplementalBalanceSheetInformationRelatedtoLeasesDetails</Role>
      <ShortName>LEASES - Summary of Supplemental Balance Sheet Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>9955591 - Disclosure - LEASES - Summary of Weighted Average Remaining Lease Term and Discount Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LEASESSummaryofWeightedAverageRemainingLeaseTermandDiscountRateDetails</Role>
      <ShortName>LEASES - Summary of Weighted Average Remaining Lease Term and Discount Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>9955592 - Disclosure - LEASES - Summary of Components of Lease Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LEASESSummaryofComponentsofLeaseExpenseDetails</Role>
      <ShortName>LEASES - Summary of Components of Lease Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>9955593 - Disclosure - LEASES - Summary of Supplemental Cash Flow Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LEASESSummaryofSupplementalCashFlowInformationRelatedtoLeasesDetails</Role>
      <ShortName>LEASES - Summary of Supplemental Cash Flow Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>9955594 - Disclosure - LEASES - Summary of Maturities of Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/LEASESSummaryofMaturitiesofLeaseLiabilitiesDetails</Role>
      <ShortName>LEASES - Summary of Maturities of Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>9955595 - Disclosure - DERIVATIVE INSTRUMENTS - Summary Of Notional Amounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTSSummaryOfNotionalAmountsDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Summary Of Notional Amounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>9955596 - Disclosure - DERIVATIVE INSTRUMENTS - Summary Of Outstanding Derivative Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTSSummaryOfOutstandingDerivativeInstrumentsDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Summary Of Outstanding Derivative Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>9955597 - Disclosure - DERIVATIVE INSTRUMENTS - Schedule of Effect of Derivative Contracts on Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTSScheduleofEffectofDerivativeContractsonComprehensiveIncomeDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Schedule of Effect of Derivative Contracts on Comprehensive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>9955598 - Disclosure - DERIVATIVE INSTRUMENTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTSNarrativeDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>9955599 - Disclosure - DERIVATIVE INSTRUMENTS - Schedule of Effect of Derivative Contracts on Income Statement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTSScheduleofEffectofDerivativeContractsonIncomeStatementDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Schedule of Effect of Derivative Contracts on Income Statement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="meli-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>9955600 - Disclosure - DERIVATIVE INSTRUMENTS - Schedule of Company's Fair Value Hedge Relationships (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mercadolibre.com/role/DERIVATIVEINSTRUMENTSScheduleofCompanysFairValueHedgeRelationshipsDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Schedule of Company's Fair Value Hedge Relationships (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>122</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="meli-20251231.htm">meli-20251231.htm</File>
    <File>meli-20251231.xsd</File>
    <File>meli-20251231_cal.xml</File>
    <File>meli-20251231_def.xml</File>
    <File>meli-20251231_lab.xml</File>
    <File>meli-20251231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>meli-20251231_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="2">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="2243">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="49">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>
