<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>2064</ContextCount>
  <ElementCount>815</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>564</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>40</UnitCount>
  <MyReports>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952151 - Statement - Consolidated Statements of Financial Position</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ConsolidatedStatementsofFinancialPosition</Role>
      <ShortName>Consolidated Statements of Financial Position</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952152 - Statement - Consolidated Statements of Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952154 - Statement - Consolidated Statements of Changes in Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ConsolidatedStatementsofChangesinEquityDeficit</Role>
      <ShortName>Consolidated Statements of Changes in Equity (Deficit)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952155 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952156 - Disclosure - Structure and Business Operations of Petroleos Mexicanos, Subsidiary Entities and Subsidiary Companies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/StructureandBusinessOperationsofPetroleosMexicanosSubsidiaryEntitiesandSubsidiaryCompanies</Role>
      <ShortName>Structure and Business Operations of Petroleos Mexicanos, Subsidiary Entities and Subsidiary Companies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952157 - Disclosure - Authorization and Basis of Preparation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/AuthorizationandBasisofPreparation</Role>
      <ShortName>Authorization and Basis of Preparation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - Material Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/MaterialAccountingPolicies</Role>
      <ShortName>Material Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - New Accounting Standard And Recently Issued Accounting Standards</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/NewAccountingStandardAndRecentlyIssuedAccountingStandards</Role>
      <ShortName>New Accounting Standard And Recently Issued Accounting Standards</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - Subsidiary Entities and Subsidiary Companies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryEntitiesandSubsidiaryCompanies</Role>
      <ShortName>Subsidiary Entities and Subsidiary Companies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - Segment Financial Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SegmentFinancialInformation</Role>
      <ShortName>Segment Financial Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - Revenue</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/Revenue</Role>
      <ShortName>Revenue</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/FinancialInstruments</Role>
      <ShortName>Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - Cash and Cash Equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CashandCashEquivalents</Role>
      <ShortName>Cash and Cash Equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - Customers and Other Financing and Non-Financing Accounts Receivable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivable</Role>
      <ShortName>Customers and Other Financing and Non-Financing Accounts Receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/Inventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNet</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Intangible Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IntangibleAssetsNet</Role>
      <ShortName>Intangible Assets, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - Government Bonds, And Other Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/GovernmentBondsAndOtherAssets</Role>
      <ShortName>Government Bonds, And Other Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - Long-Term Contractual Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LongTermContractualLiabilities</Role>
      <ShortName>Long-Term Contractual Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - Derivative Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstruments</Role>
      <ShortName>Derivative Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - Employee Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefits</Role>
      <ShortName>Employee Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - Provisions for Sundry Creditors</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ProvisionsforSundryCreditors</Role>
      <ShortName>Provisions for Sundry Creditors</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - Income Taxes and Duties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDuties</Role>
      <ShortName>Income Taxes and Duties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9952177 - Disclosure - Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EquityDeficit</Role>
      <ShortName>Equity (Deficit)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9952178 - Disclosure - Cost and Expenses by Nature</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CostandExpensesbyNature</Role>
      <ShortName>Cost and Expenses by Nature</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9952179 - Disclosure - Other Revenues and Other Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/OtherRevenuesandOtherExpenses</Role>
      <ShortName>Other Revenues and Other Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9952180 - Disclosure - Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RelatedParties</Role>
      <ShortName>Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9952181 - Disclosure - Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/Commitments</Role>
      <ShortName>Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9952182 - Disclosure - Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/Contingencies</Role>
      <ShortName>Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9952183 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9952184 - Disclosure - Subsidiary Guarantor Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryGuarantorInformation</Role>
      <ShortName>Subsidiary Guarantor Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9952185 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnaudited</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.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>37</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.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>38</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - Material Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/MaterialAccountingPoliciesPolicies</Role>
      <ShortName>Material Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/MaterialAccountingPolicies</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - Segment Financial Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SegmentFinancialInformationTables</Role>
      <ShortName>Segment Financial Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SegmentFinancialInformation</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - Revenue (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RevenueTables</Role>
      <ShortName>Revenue (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/Revenue</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/FinancialInstrumentsTables</Role>
      <ShortName>Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/FinancialInstruments</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - Cash and Cash Equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CashandCashEquivalentsTables</Role>
      <ShortName>Cash and Cash Equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/CashandCashEquivalents</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - Customers and Other Financing and Non-Financing Accounts Receivable (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivableTables</Role>
      <ShortName>Customers and Other Financing and Non-Financing Accounts Receivable (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivable</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/Inventories</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetTables</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNet</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Intangible Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IntangibleAssetsNetTables</Role>
      <ShortName>Intangible Assets, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/IntangibleAssetsNet</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - Government Bonds, And Other Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/GovernmentBondsAndOtherAssetsTables</Role>
      <ShortName>Government Bonds, And Other Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/GovernmentBondsAndOtherAssets</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/Debt</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/Leases</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - Long-Term Contractual Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LongTermContractualLiabilitiesTables</Role>
      <ShortName>Long-Term Contractual Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/LongTermContractualLiabilities</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - Derivative Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsTables</Role>
      <ShortName>Derivative Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/DerivativeFinancialInstruments</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - Employee Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsTables</Role>
      <ShortName>Employee Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/EmployeeBenefits</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - Provisions for Sundry Creditors (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ProvisionsforSundryCreditorsTables</Role>
      <ShortName>Provisions for Sundry Creditors (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/ProvisionsforSundryCreditors</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - Income Taxes and Duties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesTables</Role>
      <ShortName>Income Taxes and Duties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/IncomeTaxesandDuties</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - Equity (Deficit) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EquityDeficitTables</Role>
      <ShortName>Equity (Deficit) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/EquityDeficit</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - Cost and Expenses by Nature (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CostandExpensesbyNatureTables</Role>
      <ShortName>Cost and Expenses by Nature (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/CostandExpensesbyNature</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - Other Revenues and Other Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/OtherRevenuesandOtherExpensesTables</Role>
      <ShortName>Other Revenues and Other Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/OtherRevenuesandOtherExpenses</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - Related Parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RelatedPartiesTables</Role>
      <ShortName>Related Parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/RelatedParties</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - Commitments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CommitmentsTables</Role>
      <ShortName>Commitments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/Commitments</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - Subsequent Events (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsequentEventsTables</Role>
      <ShortName>Subsequent Events (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SubsequentEvents</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - Subsidiary Guarantor Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryGuarantorInformationTables</Role>
      <ShortName>Subsidiary Guarantor Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SubsidiaryGuarantorInformation</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnaudited</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - Authorization and Basis of Preparation - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/AuthorizationandBasisofPreparationAdditionalInformationDetail</Role>
      <ShortName>Authorization and Basis of Preparation - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - Material Accounting Policies - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/MaterialAccountingPoliciesNarrativeDetails</Role>
      <ShortName>Material Accounting Policies - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Subsidiary Entities and Subsidiary Companies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryEntitiesandSubsidiaryCompaniesAdditionalInformationDetail</Role>
      <ShortName>Subsidiary Entities and Subsidiary Companies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Segment Financial Information - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SegmentFinancialInformationAdditionalInformationDetail</Role>
      <ShortName>Segment Financial Information - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - Segment Financial Information - Condensed Financial Information of Segments after Elimination of Unrealized Intersegment Gain (Loss) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SegmentFinancialInformationCondensedFinancialInformationofSegmentsafterEliminationofUnrealizedIntersegmentGainLossDetail</Role>
      <ShortName>Segment Financial Information - Condensed Financial Information of Segments after Elimination of Unrealized Intersegment Gain (Loss) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - Segment Financial Information - Supplemental Geographic Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SegmentFinancialInformationSupplementalGeographicInformationDetail</Role>
      <ShortName>Segment Financial Information - Supplemental Geographic Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - Segment Financial Information - Schedule of Income by Product (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SegmentFinancialInformationScheduleofIncomebyProductDetail</Role>
      <ShortName>Segment Financial Information - Schedule of Income by Product (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - Revenue - Schedule of Revenue Disaggregation (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RevenueScheduleofRevenueDisaggregationDetail</Role>
      <ShortName>Revenue - Schedule of Revenue Disaggregation (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - Revenue - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RevenueAdditionalInformationDetail</Role>
      <ShortName>Revenue - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - Financial Instruments - Summary of Carrying Amounts and Fair Value of Financial Assets and Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/FinancialInstrumentsSummaryofCarryingAmountsandFairValueofFinancialAssetsandLiabilitiesDetail</Role>
      <ShortName>Financial Instruments - Summary of Carrying Amounts and Fair Value of Financial Assets and Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - Financial Instruments - Summary of Monetary Assets and Liabilities Denominated In Foreign Currency (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/FinancialInstrumentsSummaryofMonetaryAssetsandLiabilitiesDenominatedInForeignCurrencyDetail</Role>
      <ShortName>Financial Instruments - Summary of Monetary Assets and Liabilities Denominated In Foreign Currency (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDetail</Role>
      <ShortName>Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - Customers and Other Financing and Non-Financing Accounts Receivable - Summary of Accounts Receivable and Other Receivables (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivableSummaryofAccountsReceivableandOtherReceivablesDetail</Role>
      <ShortName>Customers and Other Financing and Non-Financing Accounts Receivable - Summary of Accounts Receivable and Other Receivables (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - Customers and Other Financing and Non-Financing Accounts Receivable - Schedule of Breakdown of Accounts Receivable Based on Credit History (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivableScheduleofBreakdownofAccountsReceivableBasedonCreditHistoryDetail</Role>
      <ShortName>Customers and Other Financing and Non-Financing Accounts Receivable - Schedule of Breakdown of Accounts Receivable Based on Credit History (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - Customers and Other Financing and Non-Financing Accounts Receivable - Summary of Reconciliation for Impaired Accounts Receivable (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivableSummaryofReconciliationforImpairedAccountsReceivableDetail</Role>
      <ShortName>Customers and Other Financing and Non-Financing Accounts Receivable - Summary of Reconciliation for Impaired Accounts Receivable (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - Customers and Other Financing and Non-Financing Accounts Receivable - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivableAdditionalInformationDetail</Role>
      <ShortName>Customers and Other Financing and Non-Financing Accounts Receivable - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - Customers and Other Financing and Non-Financing Accounts Receivable - Summary of Other Accounts Receivable (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CustomersandOtherFinancingandNonFinancingAccountsReceivableSummaryofOtherAccountsReceivableDetail</Role>
      <ShortName>Customers and Other Financing and Non-Financing Accounts Receivable - Summary of Other Accounts Receivable (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - Inventories - Summary of Inventories (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/InventoriesSummaryofInventoriesDetail</Role>
      <ShortName>Inventories - Summary of Inventories (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - Inventories - Summary of Inventories (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/InventoriesSummaryofInventoriesParentheticalDetail</Role>
      <ShortName>Inventories - Summary of Inventories (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetScheduleofPropertyPlantandEquipmentDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment (Pemex Exploration and Production) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofNetImpairmentPemexExplorationandProductionDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment (Pemex Exploration and Production) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net (Impairment) Reversal of Impairment (CGUs Pemex Exploration and Production) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofNetImpairmentReversalofImpairmentCGUsPemexExplorationandProductionDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net (Impairment) Reversal of Impairment (CGUs Pemex Exploration and Production) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetAdditionalInformationDetails</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Reserves (Pemex Exploration and Production) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetAssumptionstoDetermineNPVofReservesPemexExplorationandProductionDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Reserves (Pemex Exploration and Production) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Values in Use for CGU Impairment or Reversal (Pemex Exploration and Production) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofValuesinUseforCGUImpairmentorReversalPemexExplorationandProductionDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Values in Use for CGU Impairment or Reversal (Pemex Exploration and Production) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment by CGUs (Pemex Industrial Processes) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofNetImpairmentbyCGUsPemexIndustrialProcessesDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment by CGUs (Pemex Industrial Processes) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Cash Flows (Pemex Industrial Processes) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetAssumptionstoDetermineNPVofCashFlowsPemexIndustrialProcessesDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Cash Flows (Pemex Industrial Processes) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - Wells, Pipelines, Properties, Plant And Equipment, Net - Impairment of Fixed Assets (Pemex Industrial Processes) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantAndEquipmentNetImpairmentofFixedAssetsPemexIndustrialProcessesDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant And Equipment, Net - Impairment of Fixed Assets (Pemex Industrial Processes) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment by CGUs (Pemex Energy Transformation) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofNetImpairmentbyCGUsPemexEnergyTransformationDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment by CGUs (Pemex Energy Transformation) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Cash Flows (Pemex Energy Transformation) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetAssumptionstoDetermineNPVofCashFlowsPemexEnergyTransformationDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Cash Flows (Pemex Energy Transformation) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - Wells, Pipelines, Properties, Plant And Equipment, Net - Impairment of Fixed Assets (Pemex Energy Transformation) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantAndEquipmentNetImpairmentofFixedAssetsPemexEnergyTransformationDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant And Equipment, Net - Impairment of Fixed Assets (Pemex Energy Transformation) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment by CGUs (Pemex Industrial Transformation) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofNetImpairmentbyCGUsPemexIndustrialTransformationDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net Impairment by CGUs (Pemex Industrial Transformation) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Cash Flows (Pemex Industrial Tranformation) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetAssumptionstoDetermineNPVofCashFlowsPemexIndustrialTranformationDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Assumptions to Determine NPV of Cash Flows (Pemex Industrial Tranformation) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - Wells, Pipelines, Properties, Plant And Equipment, Net - Impairment of Fixed Assets (Pemex Industrial Transformation) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantAndEquipmentNetImpairmentofFixedAssetsPemexIndustrialTransformationDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant And Equipment, Net - Impairment of Fixed Assets (Pemex Industrial Transformation) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net (Impairment) Reversal of Impairment (CGUs Pemex Logistics) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofNetImpairmentReversalofImpairmentCGUsPemexLogisticsDetail</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Net (Impairment) Reversal of Impairment (CGUs Pemex Logistics) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Discount Rates and Useful Lives (CGUs Pemex Logistics) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetSummaryofDiscountRatesandUsefulLivesCGUsPemexLogisticsDetails</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Summary of Discount Rates and Useful Lives (CGUs Pemex Logistics) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Recoverable Amounts of Assets (CGUs Pemex Logistics) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetRecoverableAmountsofAssetsCGUsPemexLogisticsDetails</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Recoverable Amounts of Assets (CGUs Pemex Logistics) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Additional Information (EECs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetAdditionalInformationEECsDetails</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Additional Information (EECs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - Wells, Pipelines, Properties, Plant and Equipment, Net - Condensed Statement of Comprehensive Income and Statement of Financial Position (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/WellsPipelinesPropertiesPlantandEquipmentNetCondensedStatementofComprehensiveIncomeandStatementofFinancialPositionDetails</Role>
      <ShortName>Wells, Pipelines, Properties, Plant and Equipment, Net - Condensed Statement of Comprehensive Income and Statement of Financial Position (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - Intangible Assets, Net - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IntangibleAssetsNetAdditionalInformationDetail</Role>
      <ShortName>Intangible Assets, Net - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - Intangible Assets, Net - Schedule of Intangible Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IntangibleAssetsNetScheduleofIntangibleAssetsDetail</Role>
      <ShortName>Intangible Assets, Net - Schedule of Intangible Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - Intangible Assets, Net - Schedule of Other Components of Intangible Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IntangibleAssetsNetScheduleofOtherComponentsofIntangibleAssetsDetail</Role>
      <ShortName>Intangible Assets, Net - Schedule of Other Components of Intangible Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - Government Bonds, And Other Assets - Summary of Balance of Government Bonds (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/GovernmentBondsAndOtherAssetsSummaryofBalanceofGovernmentBondsDetail</Role>
      <ShortName>Government Bonds, And Other Assets - Summary of Balance of Government Bonds (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - Government Bonds, And Other Assets - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/GovernmentBondsAndOtherAssetsAdditionalInformationDetail</Role>
      <ShortName>Government Bonds, And Other Assets - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - Government Bonds, And Other Assets - Summary of Roll forward of the Mexican Bonds (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/GovernmentBondsAndOtherAssetsSummaryofRollforwardoftheMexicanBondsDetail</Role>
      <ShortName>Government Bonds, And Other Assets - Summary of Roll forward of the Mexican Bonds (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - Government Bonds, And Other Assets - Summary of Other Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/GovernmentBondsAndOtherAssetsSummaryofOtherAssetsDetail</Role>
      <ShortName>Government Bonds, And Other Assets - Summary of Other Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - Debt - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DebtAdditionalInformationDetails</Role>
      <ShortName>Debt - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - Debt - Summary of Long-term Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DebtSummaryofLongtermDebtDetail</Role>
      <ShortName>Debt - Summary of Long-term Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - Debt - Summary of Foreign Currency Translation (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DebtSummaryofForeignCurrencyTranslationDetail</Role>
      <ShortName>Debt - Summary of Foreign Currency Translation (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - Debt - Summary of Changes in Consolidated Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DebtSummaryofChangesinConsolidatedDebtDetail</Role>
      <ShortName>Debt - Summary of Changes in Consolidated Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - Debt - Summary of Maturities of Long Term Debt Principal Outstanding and Accrued Interest (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DebtSummaryofMaturitiesofLongTermDebtPrincipalOutstandingandAccruedInterestDetail</Role>
      <ShortName>Debt - Summary of Maturities of Long Term Debt Principal Outstanding and Accrued Interest (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - Leases - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LeasesAdditionalInformationDetail</Role>
      <ShortName>Leases - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - Leases - Summary of right-of-use assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LeasesSummaryofrightofuseassetsDetail</Role>
      <ShortName>Leases - Summary of right-of-use assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>9955589 - Disclosure - Leases - Summary of leases liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LeasesSummaryofleasesliabilitiesDetail</Role>
      <ShortName>Leases - Summary of leases liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>9955590 - Disclosure - Leases - Summary of lease liabilities recognized in statement of comprehensive income (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LeasesSummaryofleaseliabilitiesrecognizedinstatementofcomprehensiveincomeDetail</Role>
      <ShortName>Leases - Summary of lease liabilities recognized in statement of comprehensive income (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>9955591 - Disclosure - Leases - Summary of lease liabilities recognized in statement of cash flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LeasesSummaryofleaseliabilitiesrecognizedinstatementofcashflowsDetail</Role>
      <ShortName>Leases - Summary of lease liabilities recognized in statement of cash flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>9955592 - Disclosure - Long-Term Contractual Liabilities - Schedule of Contractual Long-Term liability Fair Values (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LongTermContractualLiabilitiesScheduleofContractualLongTermliabilityFairValuesDetails</Role>
      <ShortName>Long-Term Contractual Liabilities - Schedule of Contractual Long-Term liability Fair Values (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>9955593 - Disclosure - Long-Term Contractual Liabilities - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LongTermContractualLiabilitiesAdditionalInformationDetails</Role>
      <ShortName>Long-Term Contractual Liabilities - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>9955594 - Disclosure - Long-Term Contractual Liabilities - Schedule of Amortization of Long-Term Contractual Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/LongTermContractualLiabilitiesScheduleofAmortizationofLongTermContractualLiabilitiesDetails</Role>
      <ShortName>Long-Term Contractual Liabilities - Schedule of Amortization of Long-Term Contractual Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>122</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>9955595 - Disclosure - Derivative Financial Instruments - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails</Role>
      <ShortName>Derivative Financial Instruments - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>123</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>9955596 - Disclosure - Derivative Financial Instruments - Summary Of Portfolio of Financial Instruments Composed of Debt Instruments and DFI (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsSummaryOfPortfolioofFinancialInstrumentsComposedofDebtInstrumentsandDFIDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary Of Portfolio of Financial Instruments Composed of Debt Instruments and DFI (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>124</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>9955597 - Disclosure - Derivative Financial Instruments - Details of Interest Rate Sensitivity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsDetailsofInterestRateSensitivityDetail</Role>
      <ShortName>Derivative Financial Instruments - Details of Interest Rate Sensitivity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>125</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R126.htm</HtmlFileName>
      <LongName>9955598 - Disclosure - Derivative Financial Instruments - Details of Interest Rate and Currency Derivative Financial Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsDetailsofInterestRateandCurrencyDerivativeFinancialInstrumentsDetail</Role>
      <ShortName>Derivative Financial Instruments - Details of Interest Rate and Currency Derivative Financial Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>126</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R127.htm</HtmlFileName>
      <LongName>9955599 - Disclosure - Derivative Financial Instruments - Details of Current and Potential Exposures and Aggregated by Credit Rating (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsDetailsofCurrentandPotentialExposuresandAggregatedbyCreditRatingDetail</Role>
      <ShortName>Derivative Financial Instruments - Details of Current and Potential Exposures and Aggregated by Credit Rating (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>127</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>9955600 - Disclosure - Derivative Financial Instruments - Details of Quantitative Disclosure of Debt Cash Flow Maturities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsDetailsofQuantitativeDisclosureofDebtCashFlowMaturitiesDetail</Role>
      <ShortName>Derivative Financial Instruments - Details of Quantitative Disclosure of Debt Cash Flow Maturities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>128</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>9955601 - Disclosure - Derivative Financial Instruments - Summary of Quantitative Disclosure of Cash Flow's Maturities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsSummaryofQuantitativeDisclosureofCashFlowsMaturitiesDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Quantitative Disclosure of Cash Flow's Maturities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>129</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R130.htm</HtmlFileName>
      <LongName>9955602 - Disclosure - Derivative Financial Instruments - Summary of Financial Liabilities Interest And Principal Cash Flow Maturities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsSummaryofFinancialLiabilitiesInterestAndPrincipalCashFlowMaturitiesDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Financial Liabilities Interest And Principal Cash Flow Maturities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>130</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R131.htm</HtmlFileName>
      <LongName>9955603 - Disclosure - Derivative Financial Instruments - Summary of Fair Values and Notional Amounts of DFIs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsSummaryofFairValuesandNotionalAmountsofDFIsDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Fair Values and Notional Amounts of DFIs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>131</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R132.htm</HtmlFileName>
      <LongName>9955604 - Disclosure - Derivative Financial Instruments - Summary of Fair Value of DFIs included in Statement of Financial Position (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsSummaryofFairValueofDFIsincludedinStatementofFinancialPositionDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Fair Value of DFIs included in Statement of Financial Position (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>132</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R133.htm</HtmlFileName>
      <LongName>9955605 - Disclosure - Derivative Financial Instruments - Summary of Net Gain (Loss) Recognized in Income on Derivative Financial Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/DerivativeFinancialInstrumentsSummaryofNetGainLossRecognizedinIncomeonDerivativeFinancialInstrumentsDetail</Role>
      <ShortName>Derivative Financial Instruments - Summary of Net Gain (Loss) Recognized in Income on Derivative Financial Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>133</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R134.htm</HtmlFileName>
      <LongName>9955606 - Disclosure - Employee Benefits - Summary of Amounts Associated With PEMEX's Labor Obligations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsSummaryofAmountsAssociatedWithPEMEXsLaborObligationsDetail</Role>
      <ShortName>Employee Benefits - Summary of Amounts Associated With PEMEX's Labor Obligations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>134</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R135.htm</HtmlFileName>
      <LongName>9955607 - Disclosure - Employee Benefits - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsAdditionalInformationDetail</Role>
      <ShortName>Employee Benefits - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>135</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R136.htm</HtmlFileName>
      <LongName>9955608 - Disclosure - Employee Benefits - Summary of Retirement and Post-Employment Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsSummaryofRetirementandPostEmploymentBenefitsDetails</Role>
      <ShortName>Employee Benefits - Summary of Retirement and Post-Employment Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>136</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R137.htm</HtmlFileName>
      <LongName>9955609 - Disclosure - Employee Benefits - Summary of Amounts and Types of Plan Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsSummaryofAmountsandTypesofPlanAssetsDetail</Role>
      <ShortName>Employee Benefits - Summary of Amounts and Types of Plan Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>137</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R138.htm</HtmlFileName>
      <LongName>9955610 - Disclosure - Employee Benefits - Summary of Additional Fair value Disclosure About Plan Assets and Indicate Their Rank (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsSummaryofAdditionalFairvalueDisclosureAboutPlanAssetsandIndicateTheirRankDetail</Role>
      <ShortName>Employee Benefits - Summary of Additional Fair value Disclosure About Plan Assets and Indicate Their Rank (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>138</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R139.htm</HtmlFileName>
      <LongName>9955611 - Disclosure - Employee Benefits - Summary of Principal Actuarial Assumptions Used in Determining the Defined Benefit Obligation (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsSummaryofPrincipalActuarialAssumptionsUsedinDeterminingtheDefinedBenefitObligationDetail</Role>
      <ShortName>Employee Benefits - Summary of Principal Actuarial Assumptions Used in Determining the Defined Benefit Obligation (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>139</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R140.htm</HtmlFileName>
      <LongName>9955612 - Disclosure - Employee Benefits - Summary of Amounts Recognized for Other Long-term Obligations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsSummaryofAmountsRecognizedforOtherLongtermObligationsDetail</Role>
      <ShortName>Employee Benefits - Summary of Amounts Recognized for Other Long-term Obligations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>140</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R141.htm</HtmlFileName>
      <LongName>9955613 - Disclosure - Employee Benefits - Summary of Actuarial Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EmployeeBenefitsSummaryofActuarialAssumptionsDetails</Role>
      <ShortName>Employee Benefits - Summary of Actuarial Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>141</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R142.htm</HtmlFileName>
      <LongName>9955614 - Disclosure - Provisions for Sundry Creditors - Summary of Provisions for Sundry Creditors and Others (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ProvisionsforSundryCreditorsSummaryofProvisionsforSundryCreditorsandOthersDetail</Role>
      <ShortName>Provisions for Sundry Creditors - Summary of Provisions for Sundry Creditors and Others (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>142</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R143.htm</HtmlFileName>
      <LongName>9955615 - Disclosure - Provisions for Sundry Creditors - Summary of Allowance Account for Plugging of Wells, Trials in Progress and Environmental Costs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ProvisionsforSundryCreditorsSummaryofAllowanceAccountforPluggingofWellsTrialsinProgressandEnvironmentalCostsDetail</Role>
      <ShortName>Provisions for Sundry Creditors - Summary of Allowance Account for Plugging of Wells, Trials in Progress and Environmental Costs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>143</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R144.htm</HtmlFileName>
      <LongName>9955616 - Disclosure - Provisions for Sundry Creditors - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ProvisionsforSundryCreditorsAdditionalInformationDetail</Role>
      <ShortName>Provisions for Sundry Creditors - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>144</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R145.htm</HtmlFileName>
      <LongName>9955617 - Disclosure - Provisions for Sundry Creditors - Summary of provisions for plugging of wells (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ProvisionsforSundryCreditorsSummaryofprovisionsforpluggingofwellsDetail</Role>
      <ShortName>Provisions for Sundry Creditors - Summary of provisions for plugging of wells (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>145</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R146.htm</HtmlFileName>
      <LongName>9955618 - Disclosure - Income Taxes and Duties - Summary of Income Taxes and Duties Payable (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesSummaryofIncomeTaxesandDutiesPayableDetail</Role>
      <ShortName>Income Taxes and Duties - Summary of Income Taxes and Duties Payable (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>146</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R147.htm</HtmlFileName>
      <LongName>9955619 - Disclosure - Income Taxes and Duties - Welfare Oil Duty Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesWelfareOilDutyNarrativeDetails</Role>
      <ShortName>Income Taxes and Duties - Welfare Oil Duty Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>147</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R148.htm</HtmlFileName>
      <LongName>9955620 - Disclosure - Income Taxes and Duties - Exploration and Extraction Hydrocarbons Duty Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesExplorationandExtractionHydrocarbonsDutyNarrativeDetails</Role>
      <ShortName>Income Taxes and Duties - Exploration and Extraction Hydrocarbons Duty Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>148</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R149.htm</HtmlFileName>
      <LongName>9955621 - Disclosure - Income Taxes and Duties - Profit-Sharing Duty Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesProfitSharingDutyNarrativeDetails</Role>
      <ShortName>Income Taxes and Duties - Profit-Sharing Duty Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>149</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R150.htm</HtmlFileName>
      <LongName>9955622 - Disclosure - Income Taxes and Duties - Summary of Total DUC and Others (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesSummaryofTotalDUCandOthersDetail</Role>
      <ShortName>Income Taxes and Duties - Summary of Total DUC and Others (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>150</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R151.htm</HtmlFileName>
      <LongName>9955623 - Disclosure - Income Taxes and Duties - Summary of Principal Factors Generating the Deferred DUC (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesSummaryofPrincipalFactorsGeneratingtheDeferredDUCDetail</Role>
      <ShortName>Income Taxes and Duties - Summary of Principal Factors Generating the Deferred DUC (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>151</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R152.htm</HtmlFileName>
      <LongName>9955624 - Disclosure - Income Taxes and Duties - Summary of Expected Benefit for DUC (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesSummaryofExpectedBenefitforDUCDetail</Role>
      <ShortName>Income Taxes and Duties - Summary of Expected Benefit for DUC (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>152</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R153.htm</HtmlFileName>
      <LongName>9955625 - Disclosure - Income Taxes and Duties - Hydrocarbons Extraction Duty Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesHydrocarbonsExtractionDutyNarrativeDetails</Role>
      <ShortName>Income Taxes and Duties - Hydrocarbons Extraction Duty Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>153</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R154.htm</HtmlFileName>
      <LongName>9955626 - Disclosure - Income Taxes and Duties - Explorations Hydrocarbons Duty Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesExplorationsHydrocarbonsDutyNarrativeDetails</Role>
      <ShortName>Income Taxes and Duties - Explorations Hydrocarbons Duty Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>154</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R155.htm</HtmlFileName>
      <LongName>9955627 - Disclosure - Income Taxes and Duties - Summary of Income Tax Expense (Benefit) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesSummaryofIncomeTaxExpenseBenefitDetail</Role>
      <ShortName>Income Taxes and Duties - Summary of Income Tax Expense (Benefit) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>155</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R156.htm</HtmlFileName>
      <LongName>9955628 - Disclosure - Income Taxes and Duties - Summary of Principal Factors Generating Deferred Income Tax (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesSummaryofPrincipalFactorsGeneratingDeferredIncomeTaxDetail</Role>
      <ShortName>Income Taxes and Duties - Summary of Principal Factors Generating Deferred Income Tax (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>156</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R157.htm</HtmlFileName>
      <LongName>9955629 - Disclosure - Income Taxes and Duties - Summary of Expense (Benefit) Attributable to Profit (Loss) from Continuing Operations before Income Taxes (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/IncomeTaxesandDutiesSummaryofExpenseBenefitAttributabletoProfitLossfromContinuingOperationsbeforeIncomeTaxesDetail</Role>
      <ShortName>Income Taxes and Duties - Summary of Expense (Benefit) Attributable to Profit (Loss) from Continuing Operations before Income Taxes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>157</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R158.htm</HtmlFileName>
      <LongName>9955630 - Disclosure - Equity (Deficit) - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EquityDeficitAdditionalInformationDetails</Role>
      <ShortName>Equity (Deficit) - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/EquityDeficitTables</ParentRole>
      <Position>158</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R159.htm</HtmlFileName>
      <LongName>9955631 - Disclosure - Equity (Deficit) - Summary of Certificate of Contribution "A" (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EquityDeficitSummaryofCertificateofContributionADetail</Role>
      <ShortName>Equity (Deficit) - Summary of Certificate of Contribution "A" (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/EquityDeficitTables</ParentRole>
      <Position>159</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R160.htm</HtmlFileName>
      <LongName>9955632 - Disclosure - Equity (Deficit) - Summary of Government Contributions to Petroleos Mexicanos through the Ministry of Energy (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/EquityDeficitSummaryofGovernmentContributionstoPetroleosMexicanosthroughtheMinistryofEnergyDetail</Role>
      <ShortName>Equity (Deficit) - Summary of Government Contributions to Petroleos Mexicanos through the Ministry of Energy (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/EquityDeficitTables</ParentRole>
      <Position>160</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R161.htm</HtmlFileName>
      <LongName>9955633 - Disclosure - Cost and Expenses by Nature - Summary of Cost and Expenses by Nature (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CostandExpensesbyNatureSummaryofCostandExpensesbyNatureDetail</Role>
      <ShortName>Cost and Expenses by Nature - Summary of Cost and Expenses by Nature (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>161</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R162.htm</HtmlFileName>
      <LongName>9955634 - Disclosure - Other Revenues and Other Expenses - Summary of Other Revenues (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/OtherRevenuesandOtherExpensesSummaryofOtherRevenuesDetail</Role>
      <ShortName>Other Revenues and Other Expenses - Summary of Other Revenues (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>162</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R163.htm</HtmlFileName>
      <LongName>9955635 - Disclosure - Other Revenues and Other Expenses - Summary of Other Expenses (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/OtherRevenuesandOtherExpensesSummaryofOtherExpensesDetail</Role>
      <ShortName>Other Revenues and Other Expenses - Summary of Other Expenses (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>163</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R164.htm</HtmlFileName>
      <LongName>9955636 - Disclosure - Related Parties - Summary of Products Acquisition from Pemex Industrial Transformation (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RelatedPartiesSummaryofProductsAcquisitionfromPemexIndustrialTransformationDetail</Role>
      <ShortName>Related Parties - Summary of Products Acquisition from Pemex Industrial Transformation (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>164</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R165.htm</HtmlFileName>
      <LongName>9955637 - Disclosure - Related Parties - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RelatedPartiesAdditionalInformationDetail</Role>
      <ShortName>Related Parties - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>165</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R166.htm</HtmlFileName>
      <LongName>9955638 - Disclosure - Related Parties - Summary of Retirement and Former Employee Benefits Granted (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/RelatedPartiesSummaryofRetirementandFormerEmployeeBenefitsGrantedDetail</Role>
      <ShortName>Related Parties - Summary of Retirement and Former Employee Benefits Granted (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>166</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R167.htm</HtmlFileName>
      <LongName>9955639 - Disclosure - Commitments - Additional information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CommitmentsAdditionalinformationDetail</Role>
      <ShortName>Commitments - Additional information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>167</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R168.htm</HtmlFileName>
      <LongName>9955640 - Disclosure - Commitments - Estimated Future Payments Under Contracts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CommitmentsEstimatedFuturePaymentsUnderContractsDetail</Role>
      <ShortName>Commitments - Estimated Future Payments Under Contracts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>168</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R169.htm</HtmlFileName>
      <LongName>9955641 - Disclosure - Commitments - Estimated Value of Contracts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/CommitmentsEstimatedValueofContractsDetail</Role>
      <ShortName>Commitments - Estimated Value of Contracts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>169</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R170.htm</HtmlFileName>
      <LongName>9955642 - Disclosure - Contingencies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/ContingenciesAdditionalInformationDetail</Role>
      <ShortName>Contingencies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>170</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R171.htm</HtmlFileName>
      <LongName>9955643 - Disclosure - Subsequent Events - Recent Financing Activities (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsequentEventsRecentFinancingActivitiesNarrativeDetails</Role>
      <ShortName>Subsequent Events - Recent Financing Activities (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>171</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R172.htm</HtmlFileName>
      <LongName>9955644 - Disclosure - Subsequent Events - Exchange rates and crude oil prices (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsequentEventsExchangeratesandcrudeoilpricesDetail</Role>
      <ShortName>Subsequent Events - Exchange rates and crude oil prices (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>172</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R173.htm</HtmlFileName>
      <LongName>9955645 - Disclosure - Subsequent Events - Summary of Contributions from the Mexican Government (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsequentEventsSummaryofContributionsfromtheMexicanGovernmentDetails</Role>
      <ShortName>Subsequent Events - Summary of Contributions from the Mexican Government (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>173</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R174.htm</HtmlFileName>
      <LongName>9955646 - Disclosure - Subsequent Events - Amending agreements with suppliers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsequentEventsAmendingagreementswithsuppliersDetails</Role>
      <ShortName>Subsequent Events - Amending agreements with suppliers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>174</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R175.htm</HtmlFileName>
      <LongName>9955647 - Disclosure - Subsidiary Guarantor Information - Summary of Principal Amount Outstanding of Registered Debt Securities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryGuarantorInformationSummaryofPrincipalAmountOutstandingofRegisteredDebtSecuritiesDetail</Role>
      <ShortName>Subsidiary Guarantor Information - Summary of Principal Amount Outstanding of Registered Debt Securities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>175</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R176.htm</HtmlFileName>
      <LongName>9955648 - Disclosure - Subsidiary Guarantor Information - Statement of Financial Position (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryGuarantorInformationStatementofFinancialPositionDetail</Role>
      <ShortName>Subsidiary Guarantor Information - Statement of Financial Position (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>176</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R177.htm</HtmlFileName>
      <LongName>9955649 - Disclosure - Subsidiary Guarantor Information - Statement of Comprehensive Income (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryGuarantorInformationStatementofComprehensiveIncomeDetail</Role>
      <ShortName>Subsidiary Guarantor Information - Statement of Comprehensive Income (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>177</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R178.htm</HtmlFileName>
      <LongName>9955650 - Disclosure - Subsidiary Guarantor Information - Statement of Cash Flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SubsidiaryGuarantorInformationStatementofCashFlowsDetail</Role>
      <ShortName>Subsidiary Guarantor Information - Statement of Cash Flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>178</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R179.htm</HtmlFileName>
      <LongName>9955651 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Capitalized Costs for Oil and Gas Producing Activities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedSummaryofCapitalizedCostsforOilandGasProducingActivitiesDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Capitalized Costs for Oil and Gas Producing Activities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>179</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R180.htm</HtmlFileName>
      <LongName>9955652 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Costs Incurred for Oil and Gas Property Exploration and Development Activities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedSummaryofCostsIncurredforOilandGasPropertyExplorationandDevelopmentActivitiesDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Costs Incurred for Oil and Gas Property Exploration and Development Activities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>180</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R181.htm</HtmlFileName>
      <LongName>9955653 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedAdditionalInformationDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>181</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R182.htm</HtmlFileName>
      <LongName>9955654 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Results of Operations for Oil and Gas Producing Activities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedSummaryofResultsofOperationsforOilandGasProducingActivitiesDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Results of Operations for Oil and Gas Producing Activities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>182</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R183.htm</HtmlFileName>
      <LongName>9955655 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Sales Prices (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedSummaryofSalesPricesDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Sales Prices (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>183</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R184.htm</HtmlFileName>
      <LongName>9955656 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Oil and Gas Proved Reserves (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedSummaryofOilandGasProvedReservesDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Summary of Oil and Gas Proved Reserves (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>184</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R185.htm</HtmlFileName>
      <LongName>9955657 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Disclosure of Proved Developed and Undeveloped Reserve (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedDisclosureofProvedDevelopedandUndevelopedReserveDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Disclosure of Proved Developed and Undeveloped Reserve (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>185</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R186.htm</HtmlFileName>
      <LongName>9955658 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Disclosure of Standardized Measure of Discounted Future Net Cash Flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedDisclosureofStandardizedMeasureofDiscountedFutureNetCashFlowsDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Disclosure of Standardized Measure of Discounted Future Net Cash Flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>186</Position>
    </Report>
    <Report instance="ck0000932782-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R187.htm</HtmlFileName>
      <LongName>9955659 - Disclosure - Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Disclosure of Changes in standardized Measure of Discounted Future Net Cash Flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedDisclosureofChangesinstandardizedMeasureofDiscountedFutureNetCashFlowsDetail</Role>
      <ShortName>Supplementary Information on Oil and Gas Exploration and Production Activities (Unaudited) - Disclosure of Changes in standardized Measure of Discounted Future Net Cash Flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://mexicopetroleum.com/role/SupplementaryInformationonOilandGasExplorationandProductionActivitiesUnauditedTables</ParentRole>
      <Position>187</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="20-F" isDefinitelyFs="true" isIfrs="true" isUsgaap="true" original="ck0000932782-20251231.htm">ck0000932782-20251231.htm</File>
    <File>ck0000932782-20251231.xsd</File>
    <File>ck0000932782-20251231_cal.xml</File>
    <File>ck0000932782-20251231_def.xml</File>
    <File>ck0000932782-20251231_lab.xml</File>
    <File>ck0000932782-20251231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>ck0000932782-20251231_g1.jpg</File>
    <File>ck0000932782-20251231_g2.jpg</File>
    <File>ck0000932782-20251231_g3.jpg</File>
    <File>ck0000932782-20251231_g4.jpg</File>
    <File>ck0000932782-20251231_g5.jpg</File>
    <File>ck0000932782-20251231_g6.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="42">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="14">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="41">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="1">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
    <BaseTaxonomy items="3251">https://xbrl.ifrs.org/taxonomy/2025-03-27/ifrs-full</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>