<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>2672</ContextCount>
  <ElementCount>979</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>889</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>23</UnitCount>
  <MyReports>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995200090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995200100 - Statement - Consolidated statement of financial position</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/StatementConsolidatedStatementOfFinancialPosition</Role>
      <ShortName>Consolidated statement of financial position</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995200200 - Statement - Consolidated statement of profit or loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/StatementConsolidatedStatementOfProfitOrLoss</Role>
      <ShortName>Consolidated statement of profit or loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995200300 - Statement - Consolidated statement of comprehensive income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/StatementConsolidatedStatementOfComprehensiveIncome</Role>
      <ShortName>Consolidated statement of comprehensive income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995200400 - Statement - Consolidated statement of changes in equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/StatementConsolidatedStatementOfChangesInEquity</Role>
      <ShortName>Consolidated statement of changes in equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995200500 - Statement - Consolidated statement of cash flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/StatementConsolidatedStatementOfCashFlows</Role>
      <ShortName>Consolidated statement of cash flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995210101 - Disclosure - Reporting entity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureReportingEntity</Role>
      <ShortName>Reporting entity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995210201 - Disclosure - Basis for preparation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBasisForPreparation</Role>
      <ShortName>Basis for preparation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995210301 - Disclosure - Material accounting judgments and estimates</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureMaterialAccountingJudgmentsAndEstimates</Role>
      <ShortName>Material accounting judgments and estimates</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995210401 - Disclosure - Accounting policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccountingPolicies</Role>
      <ShortName>Accounting policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995210501 - Disclosure - New standards and regulatory changes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureNewStandardsAndRegulatoryChanges</Role>
      <ShortName>New standards and regulatory changes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995210601 - Disclosure - Cash and cash equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCashAndCashEquivalents</Role>
      <ShortName>Cash and cash equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210701 - Disclosure - Trade and other receivables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivables</Role>
      <ShortName>Trade and other receivables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995210801 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995210901 - Disclosure - Other financial assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssets</Role>
      <ShortName>Other financial assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995211001 - Disclosure - Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxes</Role>
      <ShortName>Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995211101 - Disclosure - Other assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherAssets</Role>
      <ShortName>Other assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995211201 - Disclosure - Business combination</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessCombination</Role>
      <ShortName>Business combination</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995211301 - Disclosure - Investments in associates and joint ventures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInvestmentsInAssociatesAndJointVentures</Role>
      <ShortName>Investments in associates and joint ventures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995211401 - Disclosure - Property, plant, and equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosurePropertyPlantAndEquipment</Role>
      <ShortName>Property, plant, and equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995211501 - Disclosure - Natural and environmental resources</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureNaturalAndEnvironmentalResources</Role>
      <ShortName>Natural and environmental resources</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995211601 - Disclosure - Right-of-use assets and lease liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRightOfUseAssetsAndLeaseLiabilities</Role>
      <ShortName>Right-of-use assets and lease liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995211701 - Disclosure - Intangible assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureIntangibleAssets</Role>
      <ShortName>Intangible assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995211801 - Disclosure - Impairment of long-term assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssets</Role>
      <ShortName>Impairment of long-term assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995211901 - Disclosure - Goodwill</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureGoodwill</Role>
      <ShortName>Goodwill</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995212001 - Disclosure - Loans and borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowings</Role>
      <ShortName>Loans and borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995212101 - Disclosure - Trade and other payables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherPayables</Role>
      <ShortName>Trade and other payables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995212201 - Disclosure - Provisions for employees' benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefits</Role>
      <ShortName>Provisions for employees' benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995212301 - Disclosure - Accrued liabilities and provisions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisions</Role>
      <ShortName>Accrued liabilities and provisions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995212401 - Disclosure - Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquity</Role>
      <ShortName>Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995212501 - Disclosure - Revenue from contracts with customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRevenueFromContractsWithCustomers</Role>
      <ShortName>Revenue from contracts with customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995212601 - Disclosure - Cost of sales</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCostOfSales</Role>
      <ShortName>Cost of sales</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995212701 - Disclosure - Administrative, operative, and project expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAdministrativeOperativeAndProjectExpenses</Role>
      <ShortName>Administrative, operative, and project expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995212801 - Disclosure - Other operating income (expenses)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherOperatingIncomeExpenses</Role>
      <ShortName>Other operating income (expenses)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995212901 - Disclosure - Financial result</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureFinancialResult</Role>
      <ShortName>Financial result</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995213001 - Disclosure - Risk management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagement</Role>
      <ShortName>Risk management</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995213101 - Disclosure - Related parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRelatedParties</Role>
      <ShortName>Related parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995213201 - Disclosure - Joint operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureJointOperations</Role>
      <ShortName>Joint operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995213301 - Disclosure - Business segment information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessSegmentInformation</Role>
      <ShortName>Business segment information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995213401 - Disclosure - Subsequent and relevant events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSubsequentAndRelevantEvents</Role>
      <ShortName>Subsequent and relevant events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995213501 - Disclosure - Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit1ConsolidatedSubsidiariesAssociatesAndJointVentures</Role>
      <ShortName>Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995213601 - Disclosure - Exhibit 2 - Consolidated subsidiaries, associates, and joint ventures in Interconexion Electrica SA ESP</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit2ConsolidatedSubsidiariesAssociatesAndJointVenturesInInterconexionElectricaSaEsp</Role>
      <ShortName>Exhibit 2 - Consolidated subsidiaries, associates, and joint ventures in Interconexion Electrica SA ESP</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995213701 - Disclosure - Exhibit 3 - Conditions of the most significant debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit3ConditionsOfMostSignificantDebt</Role>
      <ShortName>Exhibit 3 - Conditions of the most significant debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995213801 - Disclosure - Exhibit 4. Quantitative information of concession services contracts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit4QuantitativeInformationOfConcessionServicesContracts</Role>
      <ShortName>Exhibit 4. Quantitative information of concession services contracts</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995213901 - Disclosure - Supplemental information on oil and gas producing activities (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnaudited</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.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>46</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.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>47</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>99920402 - Disclosure - Accounting policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccountingPoliciesPolicies</Role>
      <ShortName>Accounting policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureAccountingPolicies</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>99930403 - Disclosure - Accounting policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccountingPoliciesTables</Role>
      <ShortName>Accounting policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureAccountingPolicies</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>99930603 - Disclosure - Cash and cash equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCashAndCashEquivalentsTables</Role>
      <ShortName>Cash and cash equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureCashAndCashEquivalents</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>99930703 - Disclosure - Trade and other receivables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivablesTables</Role>
      <ShortName>Trade and other receivables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>99930803 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureInventories</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>99930903 - Disclosure - Other financial assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsTables</Role>
      <ShortName>Other financial assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssets</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>99931003 - Disclosure - Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesTables</Role>
      <ShortName>Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureTaxes</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>99931103 - Disclosure - Other assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherAssetsTables</Role>
      <ShortName>Other assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureOtherAssets</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>99931203 - Disclosure - Business combination (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessCombinationTables</Role>
      <ShortName>Business combination (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureBusinessCombination</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>99931303 - Disclosure - Investments in associates and joint ventures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInvestmentsInAssociatesAndJointVenturesTables</Role>
      <ShortName>Investments in associates and joint ventures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureInvestmentsInAssociatesAndJointVentures</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>99931403 - Disclosure - Property, plant, and equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosurePropertyPlantAndEquipmentTables</Role>
      <ShortName>Property, plant, and equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosurePropertyPlantAndEquipment</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>99931503 - Disclosure - Natural and environmental resources (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureNaturalAndEnvironmentalResourcesTables</Role>
      <ShortName>Natural and environmental resources (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureNaturalAndEnvironmentalResources</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>99931603 - Disclosure - Right-of-use assets and lease liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRightOfUseAssetsAndLeaseLiabilitiesTables</Role>
      <ShortName>Right-of-use assets and lease liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureRightOfUseAssetsAndLeaseLiabilities</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>99931703 - Disclosure - Intangible assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureIntangibleAssetsTables</Role>
      <ShortName>Intangible assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureIntangibleAssets</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>99931803 - Disclosure - Impairment of long-term assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsTables</Role>
      <ShortName>Impairment of long-term assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssets</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>99931903 - Disclosure - Goodwill (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureGoodwillTables</Role>
      <ShortName>Goodwill (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureGoodwill</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>99932003 - Disclosure - Loans and borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowingsTables</Role>
      <ShortName>Loans and borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowings</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>99932103 - Disclosure - Trade and other payables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherPayablesTables</Role>
      <ShortName>Trade and other payables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherPayables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>99932203 - Disclosure - Provisions for employees' benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsTables</Role>
      <ShortName>Provisions for employees' benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefits</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>99932303 - Disclosure - Accrued liabilities and provisions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisionsTables</Role>
      <ShortName>Accrued liabilities and provisions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisions</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>99932403 - Disclosure - Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquityTables</Role>
      <ShortName>Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureEquity</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>99932503 - Disclosure - Revenue from contracts with customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRevenueFromContractsWithCustomersTables</Role>
      <ShortName>Revenue from contracts with customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureRevenueFromContractsWithCustomers</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>99932603 - Disclosure - Cost of sales (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCostOfSalesTables</Role>
      <ShortName>Cost of sales (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureCostOfSales</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>99932703 - Disclosure - Administrative, operative, and project expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAdministrativeOperativeAndProjectExpensesTables</Role>
      <ShortName>Administrative, operative, and project expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureAdministrativeOperativeAndProjectExpenses</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>99932803 - Disclosure - Other operating income (expenses) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherOperatingIncomeExpensesTables</Role>
      <ShortName>Other operating income (expenses) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureOtherOperatingIncomeExpenses</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>99932903 - Disclosure - Financial result (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureFinancialResultTables</Role>
      <ShortName>Financial result (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureFinancialResult</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>99933003 - Disclosure - Risk management (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementTables</Role>
      <ShortName>Risk management (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureRiskManagement</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>99933103 - Disclosure - Related parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRelatedPartiesTables</Role>
      <ShortName>Related parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureRelatedParties</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>99933203 - Disclosure - Joint operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureJointOperationsTables</Role>
      <ShortName>Joint operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureJointOperations</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>99933303 - Disclosure - Business segment information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessSegmentInformationTables</Role>
      <ShortName>Business segment information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureBusinessSegmentInformation</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>99933503 - Disclosure - Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit1ConsolidatedSubsidiariesAssociatesAndJointVenturesTables</Role>
      <ShortName>Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureExhibit1ConsolidatedSubsidiariesAssociatesAndJointVentures</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>99933603 - Disclosure - Exhibit 2 - Consolidated subsidiaries, associates, and joint ventures in Interconexion Electrica SA ESP (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit2ConsolidatedSubsidiariesAssociatesAndJointVenturesInInterconexionElectricaSaEspTables</Role>
      <ShortName>Exhibit 2 - Consolidated subsidiaries, associates, and joint ventures in Interconexion Electrica SA ESP (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureExhibit2ConsolidatedSubsidiariesAssociatesAndJointVenturesInInterconexionElectricaSaEsp</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>99933703 - Disclosure - Exhibit 3 - Conditions of the most significant debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit3ConditionsOfMostSignificantDebtTables</Role>
      <ShortName>Exhibit 3 - Conditions of the most significant debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureExhibit3ConditionsOfMostSignificantDebt</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>99933803 - Disclosure - Exhibit 4. Quantitative information of concession services contracts (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit4QuantitativeInformationOfConcessionServicesContractsTables</Role>
      <ShortName>Exhibit 4. Quantitative information of concession services contracts (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureExhibit4QuantitativeInformationOfConcessionServicesContracts</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>99933903 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnaudited</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>99940101 - Disclosure - Reporting entity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureReportingEntityDetails</Role>
      <ShortName>Reporting entity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureReportingEntity</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>99940201 - Disclosure - Basis for preparation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBasisForPreparationDetails</Role>
      <ShortName>Basis for preparation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureBasisForPreparation</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>99940401 - Disclosure - Accounting policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccountingPoliciesDetails</Role>
      <ShortName>Accounting policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureAccountingPoliciesTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>99940402 - Disclosure - Accounting policies - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccountingPoliciesAdditionalInformationDetails</Role>
      <ShortName>Accounting policies - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>99940601 - Disclosure - Cash and cash equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCashAndCashEquivalentsDetails</Role>
      <ShortName>Cash and cash equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureCashAndCashEquivalentsTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>99940602 - Disclosure - Cash and cash equivalents - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCashAndCashEquivalentsAdditionalInformationDetails</Role>
      <ShortName>Cash and cash equivalents - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>99940603 - Disclosure - Cash and cash equivalents - Credit quality of banks in the Ecopetrol Business Group has deposits and check accounts, and issuers of investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCashAndCashEquivalentsCreditQualityOfBanksInEcopetrolBusinessGroupHasDepositsAndCheckAccountsAndIssuersOfInvestmentsDetails</Role>
      <ShortName>Cash and cash equivalents - Credit quality of banks in the Ecopetrol Business Group has deposits and check accounts, and issuers of investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>99940701 - Disclosure - Trade and other receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivablesDetails</Role>
      <ShortName>Trade and other receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivablesTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>99940702 - Disclosure - Trade and other receivables - Fuel Price Stabilization Fun (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivablesFuelPriceStabilizationFunDetails</Role>
      <ShortName>Trade and other receivables - Fuel Price Stabilization Fun (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>99940703 - Disclosure - Trade and other receivables - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivablesAdditionalInformationDetails</Role>
      <ShortName>Trade and other receivables - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>99940704 - Disclosure - Trade and other receivables - Allowance for doubtful accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivablesAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>Trade and other receivables - Allowance for doubtful accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>99940705 - Disclosure - Trade and other receivables - Movement of the contractual asset (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherReceivablesMovementOfContractualAssetDetails</Role>
      <ShortName>Trade and other receivables - Movement of the contractual asset (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>99940801 - Disclosure - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInventoriesDetails</Role>
      <ShortName>Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureInventoriesTables</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>99940802 - Disclosure - Inventories - Changes of the allowances for losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInventoriesChangesOfAllowancesForLossesDetails</Role>
      <ShortName>Inventories - Changes of the allowances for losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>99940901 - Disclosure - Other financial assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsDetails</Role>
      <ShortName>Other financial assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsTables</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>99940902 - Disclosure - Other financial assets - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsAdditionalInformationDetails</Role>
      <ShortName>Other financial assets - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>99940903 - Disclosure - Other financial assets - Restrictions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsRestrictionsDetails</Role>
      <ShortName>Other financial assets - Restrictions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>99940904 - Disclosure - Other financial assets - Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsMaturityDetails</Role>
      <ShortName>Other financial assets - Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>99940905 - Disclosure - Other financial assets - Fair value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsFairValueDetails</Role>
      <ShortName>Other financial assets - Fair value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>99940906 - Disclosure - Other financial assets - Movement of equity investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsMovementOfEquityInvestmentsDetails</Role>
      <ShortName>Other financial assets - Movement of equity investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>99940907 - Disclosure - Other financial assets - Credit rating (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherFinancialAssetsCreditRatingDetails</Role>
      <ShortName>Other financial assets - Credit rating (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>99941001 - Disclosure - Taxes - Current and Non-current tax assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesCurrentAndNonCurrentTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Taxes - Current and Non-current tax assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>99941002 - Disclosure - Taxes - Income tax - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesIncomeTaxAdditionalInformationDetails</Role>
      <ShortName>Taxes - Income tax - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>99941003 - Disclosure - Taxes - Income tax expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesIncomeTaxExpenseDetails</Role>
      <ShortName>Taxes - Income tax expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>99941004 - Disclosure - Taxes - Reconciliation of the income tax expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesReconciliationOfIncomeTaxExpensesDetails</Role>
      <ShortName>Taxes - Reconciliation of the income tax expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>99941005 - Disclosure - Taxes - Deferred income tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesDeferredIncomeTaxDetailss</Role>
      <ShortName>Taxes - Deferred income tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>99941006 - Disclosure - Taxes - Deferred tax assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Taxes - Deferred tax assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>99941007 - Disclosure - Taxes - Deferred income tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesDeferredIncomeTaxDetails</Role>
      <ShortName>Taxes - Deferred income tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>99941008 - Disclosure - Taxes - Income tax recorded in other comprehensive income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesIncomeTaxRecordedInOtherComprehensiveIncomeDetails</Role>
      <ShortName>Taxes - Income tax recorded in other comprehensive income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>99941009 - Disclosure - Taxes - Deferred tax assets and liabilities not recognized in subsidiaries (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesDeferredTaxAssetsAndLiabilitiesNotRecognizedInSubsidiariesDetails</Role>
      <ShortName>Taxes - Deferred tax assets and liabilities not recognized in subsidiaries (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>99941010 - Disclosure - Taxes - Minimum Tax Rate (Colombia Tax Law) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesMinimumTaxRateColombiaTaxLawDetails</Role>
      <ShortName>Taxes - Minimum Tax Rate (Colombia Tax Law) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>99941011 - Disclosure - Taxes - Other taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTaxesOtherTaxesDetails</Role>
      <ShortName>Taxes - Other taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>99941101 - Disclosure - Other assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherAssetsDetails</Role>
      <ShortName>Other assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureOtherAssetsTables</ParentRole>
      <Position>115</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>99941201 - Disclosure - Business Combination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessCombinationDetails</Role>
      <ShortName>Business Combination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>99941202 - Disclosure - Business Combination - Identifiable Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessCombinationIdentifiableAssetsAcquiredAndLiabilitiesAssumedDetails</Role>
      <ShortName>Business Combination - Identifiable Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>99941301 - Disclosure - Investments in associates and joint ventures - Composition and movements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInvestmentsInAssociatesAndJointVenturesCompositionAndMovementsDetails</Role>
      <ShortName>Investments in associates and joint ventures - Composition and movements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>99941302 - Disclosure - Investments in associates and joint ventures - Movement of investments in associates and joint ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInvestmentsInAssociatesAndJointVenturesMovementOfInvestmentsInAssociatesAndJointVenturesDetails</Role>
      <ShortName>Investments in associates and joint ventures - Movement of investments in associates and joint ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>99941303 - Disclosure - Investments in associates and joint ventures - Additional information about associates and joint ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInvestmentsInAssociatesAndJointVenturesAdditionalInformationAboutAssociatesAndJointVenturesDetails</Role>
      <ShortName>Investments in associates and joint ventures - Additional information about associates and joint ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>99941304 - Disclosure - Investments in associates and joint ventures - Reconciliation of equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureInvestmentsInAssociatesAndJointVenturesReconciliationOfEquityDetails</Role>
      <ShortName>Investments in associates and joint ventures - Reconciliation of equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>99941401 - Disclosure - Property, plant, and equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosurePropertyPlantAndEquipmentDetails</Role>
      <ShortName>Property, plant, and equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosurePropertyPlantAndEquipmentTables</ParentRole>
      <Position>122</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>99941501 - Disclosure - Natural and environmental resources (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureNaturalAndEnvironmentalResourcesDetails</Role>
      <ShortName>Natural and environmental resources (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureNaturalAndEnvironmentalResourcesTables</ParentRole>
      <Position>123</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>99941502 - Disclosure - Natural and environmental resources - Accounting for suspended exploratory wells (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureNaturalAndEnvironmentalResourcesAccountingForSuspendedExploratoryWellsDetails</Role>
      <ShortName>Natural and environmental resources - Accounting for suspended exploratory wells (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>124</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>99941601 - Disclosure - Right-of-use assets and lease liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRightOfUseAssetsAndLeaseLiabilitiesDetails</Role>
      <ShortName>Right-of-use assets and lease liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureRightOfUseAssetsAndLeaseLiabilitiesTables</ParentRole>
      <Position>125</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R126.htm</HtmlFileName>
      <LongName>99941701 - Disclosure - Intangible assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureIntangibleAssetsDetails</Role>
      <ShortName>Intangible assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureIntangibleAssetsTables</ParentRole>
      <Position>126</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R127.htm</HtmlFileName>
      <LongName>99941801 - Disclosure - Impairment of long-term assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsDetails</Role>
      <ShortName>Impairment of long-term assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsTables</ParentRole>
      <Position>127</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>99941802 - Disclosure - Impairment of long-term assets - Exploration and production (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsExplorationAndProductionDetails</Role>
      <ShortName>Impairment of long-term assets - Exploration and production (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>128</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>99941803 - Disclosure - Impairment of long-term assets - Breakdown of oilfields impairment losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsBreakdownOfOilfieldsImpairmentLossesDetails</Role>
      <ShortName>Impairment of long-term assets - Breakdown of oilfields impairment losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>129</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R130.htm</HtmlFileName>
      <LongName>99941804 - Disclosure - Impairment of long-term assets - Investments in joint ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsInvestmentsInJointVenturesDetails</Role>
      <ShortName>Impairment of long-term assets - Investments in joint ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>130</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R131.htm</HtmlFileName>
      <LongName>99941805 - Disclosure - Impairment of long-term assets - Cash Generating Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsCashGeneratingUnitsDetails</Role>
      <ShortName>Impairment of long-term assets - Cash Generating Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>131</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R132.htm</HtmlFileName>
      <LongName>99941806 - Disclosure - Impairment of long-term assets - Energy transmission and roads (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsEnergyTransmissionAndRoadsDetails</Role>
      <ShortName>Impairment of long-term assets - Energy transmission and roads (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>132</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R133.htm</HtmlFileName>
      <LongName>99941807 - Disclosure - Impairment of long-term assets - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureImpairmentOfLongTermAssetsAdditionalInformationDetails</Role>
      <ShortName>Impairment of long-term assets - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>133</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R134.htm</HtmlFileName>
      <LongName>99941901 - Disclosure - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureGoodwillDetails</Role>
      <ShortName>Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureGoodwillTables</ParentRole>
      <Position>134</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R135.htm</HtmlFileName>
      <LongName>99942001 - Disclosure - Loans and borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowingsDetails</Role>
      <ShortName>Loans and borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowingsTables</ParentRole>
      <Position>135</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R136.htm</HtmlFileName>
      <LongName>99942002 - Disclosure - Loans and borrowings - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowingsAdditionalInformationDetails</Role>
      <ShortName>Loans and borrowings - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>136</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R137.htm</HtmlFileName>
      <LongName>99942003 - Disclosure - Loans and borrowings - Fair value of loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowingsFairValueOfLoansDetails</Role>
      <ShortName>Loans and borrowings - Fair value of loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>137</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R138.htm</HtmlFileName>
      <LongName>99942004 - Disclosure - Loans and borrowings - Maturity of loans and borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowingsMaturityOfLoansAndBorrowingsDetails</Role>
      <ShortName>Loans and borrowings - Maturity of loans and borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>138</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R139.htm</HtmlFileName>
      <LongName>99942005 - Disclosure - Loans and borrowings - Breakdown by type of interest rate and currency (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureLoansAndBorrowingsBreakdownByTypeOfInterestRateAndCurrencyDetails</Role>
      <ShortName>Loans and borrowings - Breakdown by type of interest rate and currency (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>139</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R140.htm</HtmlFileName>
      <LongName>99942101 - Disclosure - Trade and other payables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherPayablesDetails</Role>
      <ShortName>Trade and other payables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherPayablesTables</ParentRole>
      <Position>140</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R141.htm</HtmlFileName>
      <LongName>99942102 - Disclosure - Trade and other payables - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureTradeAndOtherPayablesAdditionalInformationDetails</Role>
      <ShortName>Trade and other payables - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>141</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R142.htm</HtmlFileName>
      <LongName>99942201 - Disclosure - Provisions for employees' benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsDetails</Role>
      <ShortName>Provisions for employees' benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsTables</ParentRole>
      <Position>142</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R143.htm</HtmlFileName>
      <LongName>99942202 - Disclosure - Provisions for employees' benefits - Net of post-employment benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsNetOfPostEmploymentBenefitsDetails</Role>
      <ShortName>Provisions for employees' benefits - Net of post-employment benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>143</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R144.htm</HtmlFileName>
      <LongName>99942203 - Disclosure - Provisions for employees' benefits - Movement in profit and loss and in other comprehensive income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsMovementInProfitAndLossAndInOtherComprehensiveIncomeDetails</Role>
      <ShortName>Provisions for employees' benefits - Movement in profit and loss and in other comprehensive income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>144</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R145.htm</HtmlFileName>
      <LongName>99942204 - Disclosure - Provisions for employees' benefits - Plan assets of pension and pension bonds (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsPlanAssetsOfPensionAndPensionBondsDetails</Role>
      <ShortName>Provisions for employees' benefits - Plan assets of pension and pension bonds (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>145</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R146.htm</HtmlFileName>
      <LongName>99942205 - Disclosure - Provisions for employees' benefits - Credit ratings of the issuers and counterparties in assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsCreditRatingsOfIssuersAndCounterpartiesInAssetsDetails</Role>
      <ShortName>Provisions for employees' benefits - Credit ratings of the issuers and counterparties in assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>146</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R147.htm</HtmlFileName>
      <LongName>99942206 - Disclosure - Provisions for employees' benefits - Actuarial assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsActuarialAssumptionsDetails</Role>
      <ShortName>Provisions for employees' benefits - Actuarial assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>147</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R148.htm</HtmlFileName>
      <LongName>99942207 - Disclosure - Provisions for employees' benefits - Maturity of benefit obligation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsMaturityOfBenefitObligationDetails</Role>
      <ShortName>Provisions for employees' benefits - Maturity of benefit obligation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>148</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R149.htm</HtmlFileName>
      <LongName>99942208 - Disclosure - Provisions for employees' benefits - Sensitivity analysis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureProvisionsForEmployeesBenefitsSensitivityAnalysisDetails</Role>
      <ShortName>Provisions for employees' benefits - Sensitivity analysis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>149</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R150.htm</HtmlFileName>
      <LongName>99942301 - Disclosure - Accrued liabilities and provisions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisionsDetails</Role>
      <ShortName>Accrued liabilities and provisions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisionsTables</ParentRole>
      <Position>150</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R151.htm</HtmlFileName>
      <LongName>99942302 - Disclosure - Accrued liabilities and provisions - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisionsAdditionalInformationDetails</Role>
      <ShortName>Accrued liabilities and provisions - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>151</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R152.htm</HtmlFileName>
      <LongName>99942303 - Disclosure - Accrued liabilities and provisions - Litigation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisionsLitigationDetails</Role>
      <ShortName>Accrued liabilities and provisions - Litigation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>152</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R153.htm</HtmlFileName>
      <LongName>99942304 - Disclosure - Accrued liabilities and provisions - Details of contingent liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisionsDetailsOfContingentLiabilitiesDetails</Role>
      <ShortName>Accrued liabilities and provisions - Details of contingent liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>153</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R154.htm</HtmlFileName>
      <LongName>99942305 - Disclosure - Accrued liabilities and provisions - Details of contingent assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAccruedLiabilitiesAndProvisionsDetailsOfContingentAssetsDetails</Role>
      <ShortName>Accrued liabilities and provisions - Details of contingent assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>154</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R155.htm</HtmlFileName>
      <LongName>99942401 - Disclosure - Equity - Ecopetrol Business Groups reserves (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquityEcopetrolBusinessGroupsReservesDetails</Role>
      <ShortName>Equity - Ecopetrol Business Groups reserves (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>155</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R156.htm</HtmlFileName>
      <LongName>99942402 - Disclosure - Equity - Movement of equity reserves (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquityMovementOfEquityReservesDetails</Role>
      <ShortName>Equity - Movement of equity reserves (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>156</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R157.htm</HtmlFileName>
      <LongName>99942403 - Disclosure - Equity - Dividends paid (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquityDividendsPaidDetails</Role>
      <ShortName>Equity - Dividends paid (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>157</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R158.htm</HtmlFileName>
      <LongName>99942404 - Disclosure - Equity - Other comprehensive income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquityOtherComprehensiveIncomeDetails</Role>
      <ShortName>Equity - Other comprehensive income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>158</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R159.htm</HtmlFileName>
      <LongName>99942405 - Disclosure - Equity - Earnings per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquityEarningsPerShareDetails</Role>
      <ShortName>Equity - Earnings per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>159</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R160.htm</HtmlFileName>
      <LongName>99942406 - Disclosure - Equity - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureEquityAdditionalInformationDetails</Role>
      <ShortName>Equity - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>160</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R161.htm</HtmlFileName>
      <LongName>99942501 - Disclosure - Revenue from contracts with customers - National and foreign sales (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRevenueFromContractsWithCustomersNationalAndForeignSalesDetails</Role>
      <ShortName>Revenue from contracts with customers - National and foreign sales (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>161</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R162.htm</HtmlFileName>
      <LongName>99942502 - Disclosure - Revenue from contracts with customers - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRevenueFromContractsWithCustomersAdditionalInformationDetails</Role>
      <ShortName>Revenue from contracts with customers - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>162</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R163.htm</HtmlFileName>
      <LongName>99942503 - Disclosure - Revenue from contracts with customers - Sales by geographic area (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRevenueFromContractsWithCustomersSalesByGeographicAreaDetails</Role>
      <ShortName>Revenue from contracts with customers - Sales by geographic area (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>163</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R164.htm</HtmlFileName>
      <LongName>99942601 - Disclosure - Cost of sales (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureCostOfSalesDetails</Role>
      <ShortName>Cost of sales (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureCostOfSalesTables</ParentRole>
      <Position>164</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R165.htm</HtmlFileName>
      <LongName>99942701 - Disclosure - Administrative, operative, and project expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureAdministrativeOperativeAndProjectExpensesDetails</Role>
      <ShortName>Administrative, operative, and project expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureAdministrativeOperativeAndProjectExpensesTables</ParentRole>
      <Position>165</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R166.htm</HtmlFileName>
      <LongName>99942801 - Disclosure - Other operating income (expenses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureOtherOperatingIncomeExpensesDetails</Role>
      <ShortName>Other operating income (expenses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureOtherOperatingIncomeExpensesTables</ParentRole>
      <Position>166</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R167.htm</HtmlFileName>
      <LongName>99942901 - Disclosure - Financial result (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureFinancialResultDetails</Role>
      <ShortName>Financial result (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureFinancialResultTables</ParentRole>
      <Position>167</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R168.htm</HtmlFileName>
      <LongName>99943001 - Disclosure - Risk management - Financial assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementFinancialAssetsAndLiabilitiesDetails</Role>
      <ShortName>Risk management - Financial assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>168</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R169.htm</HtmlFileName>
      <LongName>99943002 - Disclosure - Risk management - Financial assets and liabilities denominated in foreign currency (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementFinancialAssetsAndLiabilitiesDenominatedInForeignCurrencyDetails</Role>
      <ShortName>Risk management - Financial assets and liabilities denominated in foreign currency (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>169</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R170.htm</HtmlFileName>
      <LongName>99943003 - Disclosure - Risk management - Non derivative hedging instrument (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementNonDerivativeHedgingInstrumentDetails</Role>
      <ShortName>Risk management - Non derivative hedging instrument (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>170</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R171.htm</HtmlFileName>
      <LongName>99943004 - Disclosure - Risk management - Cash flow hedge for future exports (Movement in other comprehensive income) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementCashFlowHedgeForFutureExportsMovementInOtherComprehensiveIncomeDetails</Role>
      <ShortName>Risk management - Cash flow hedge for future exports (Movement in other comprehensive income) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>171</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R172.htm</HtmlFileName>
      <LongName>99943005 - Disclosure - Risk management - Expected reclassification of the cumulative exchange difference from other comprehensive income to profit or loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementExpectedReclassificationOfCumulativeExchangeDifferenceFromOtherComprehensiveIncomeToProfitOrLossDetails</Role>
      <ShortName>Risk management - Expected reclassification of the cumulative exchange difference from other comprehensive income to profit or loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>172</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R173.htm</HtmlFileName>
      <LongName>99943006 - Disclosure - Risk management - Hedge of a net investment in a foreign operation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementHedgeOfNetInvestmentInForeignOperationDetails</Role>
      <ShortName>Risk management - Hedge of a net investment in a foreign operation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>173</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R174.htm</HtmlFileName>
      <LongName>99943007 - Disclosure - Risk management - Schedule of Detailed Information About Hedging Instruments Explanatory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementScheduleOfDetailedInformationAboutHedgingInstrumentsExplanatoryDetails</Role>
      <ShortName>Risk management - Schedule of Detailed Information About Hedging Instruments Explanatory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>174</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R175.htm</HtmlFileName>
      <LongName>99943008 - Disclosure - Risk management - Significant concentration of credit risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementSignificantConcentrationOfCreditRiskDetails</Role>
      <ShortName>Risk management - Significant concentration of credit risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>175</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R176.htm</HtmlFileName>
      <LongName>99943009 - Disclosure - Risk management - Risk management - Sensitivity in income and other comprehensive income to variations in interest rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementRiskManagementSensitivityInIncomeAndOtherComprehensiveIncomeToVariationsInInterestRateDetails</Role>
      <ShortName>Risk management - Risk management - Sensitivity in income and other comprehensive income to variations in interest rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>176</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R177.htm</HtmlFileName>
      <LongName>99943010 - Disclosure - Risk management - Maturity of financial liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementMaturityOfFinancialLiabilitiesDetails</Role>
      <ShortName>Risk management - Maturity of financial liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>177</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R178.htm</HtmlFileName>
      <LongName>99943011 - Disclosure - Risk management - Leverage ratio (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementLeverageRatioDetails</Role>
      <ShortName>Risk management - Leverage ratio (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>178</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R179.htm</HtmlFileName>
      <LongName>99943012 - Disclosure - Risk management - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRiskManagementAdditionalInformationDetails</Role>
      <ShortName>Risk management - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>179</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R180.htm</HtmlFileName>
      <LongName>99943101 - Disclosure - Related parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRelatedPartiesDetails</Role>
      <ShortName>Related parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureRelatedPartiesTables</ParentRole>
      <Position>180</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R181.htm</HtmlFileName>
      <LongName>99943102 - Disclosure - Related parties - Transactions with related parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRelatedPartiesTransactionsWithRelatedPartiesDetails</Role>
      <ShortName>Related parties - Transactions with related parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>181</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R182.htm</HtmlFileName>
      <LongName>99943103 - Disclosure - Related parties - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureRelatedPartiesAdditionalInformationDetails</Role>
      <ShortName>Related parties - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>182</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R183.htm</HtmlFileName>
      <LongName>99943201 - Disclosure - Joint operations - Contracts in which Ecopetrol is not the operator (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureJointOperationsContractsInWhichEcopetrolIsNotOperatorDetails</Role>
      <ShortName>Joint operations - Contracts in which Ecopetrol is not the operator (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>183</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R184.htm</HtmlFileName>
      <LongName>99943202 - Disclosure - Joint operations - Contracts in which Ecopetrol is the operator (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureJointOperationsContractsInWhichEcopetrolIsOperatorDetails</Role>
      <ShortName>Joint operations - Contracts in which Ecopetrol is the operator (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>184</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R185.htm</HtmlFileName>
      <LongName>99943203 - Disclosure - Joint operations - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureJointOperationsAdditionalInformationDetails</Role>
      <ShortName>Joint operations - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>185</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R186.htm</HtmlFileName>
      <LongName>99943301 - Disclosure - Business segment information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessSegmentInformationDetails</Role>
      <ShortName>Business segment information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureBusinessSegmentInformationTables</ParentRole>
      <Position>186</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R187.htm</HtmlFileName>
      <LongName>99943302 - Disclosure - Business segment information - Sales by product (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessSegmentInformationSalesByProductDetails</Role>
      <ShortName>Business segment information - Sales by product (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>187</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R188.htm</HtmlFileName>
      <LongName>99943303 - Disclosure - Business segment information - Capital expenditures by segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureBusinessSegmentInformationCapitalExpendituresBySegmentsDetails</Role>
      <ShortName>Business segment information - Capital expenditures by segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>188</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R189.htm</HtmlFileName>
      <LongName>99943401 - Disclosure - Subsequent and relevant events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSubsequentAndRelevantEventsDetails</Role>
      <ShortName>Subsequent and relevant events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSubsequentAndRelevantEvents</ParentRole>
      <Position>189</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R190.htm</HtmlFileName>
      <LongName>99943501 - Disclosure - Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures - Consolidated subsidiary companies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit1ConsolidatedSubsidiariesAssociatesAndJointVenturesConsolidatedSubsidiaryCompaniesDetails</Role>
      <ShortName>Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures - Consolidated subsidiary companies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>190</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R191.htm</HtmlFileName>
      <LongName>99943502 - Disclosure - Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures - Associates and Joint ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit1ConsolidatedSubsidiariesAssociatesAndJointVenturesAssociatesAndJointVenturesDetails</Role>
      <ShortName>Exhibit 1 - Consolidated subsidiaries, associates, and joint ventures - Associates and Joint ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>191</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R192.htm</HtmlFileName>
      <LongName>99943601 - Disclosure - Exhibit 2 - Consolidated subsidiaries, associates, and joint ventures in Interconexion Electrica SA ESP (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit2ConsolidatedSubsidiariesAssociatesAndJointVenturesInInterconexionElectricaSaEspDetails</Role>
      <ShortName>Exhibit 2 - Consolidated subsidiaries, associates, and joint ventures in Interconexion Electrica SA ESP (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureExhibit2ConsolidatedSubsidiariesAssociatesAndJointVenturesInInterconexionElectricaSaEspTables</ParentRole>
      <Position>192</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R193.htm</HtmlFileName>
      <LongName>99943701 - Disclosure - Exhibit 3 - Conditions of the most significant debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit3ConditionsOfMostSignificantDebtDetails</Role>
      <ShortName>Exhibit 3 - Conditions of the most significant debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureExhibit3ConditionsOfMostSignificantDebtTables</ParentRole>
      <Position>193</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R194.htm</HtmlFileName>
      <LongName>99943801 - Disclosure - Exhibit 4. Quantitative information of concession services contracts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureExhibit4QuantitativeInformationOfConcessionServicesContractsDetails</Role>
      <ShortName>Exhibit 4. Quantitative information of concession services contracts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureExhibit4QuantitativeInformationOfConcessionServicesContractsTables</ParentRole>
      <Position>194</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R195.htm</HtmlFileName>
      <LongName>99943901 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) - Capitalized costs relating to oil and gas exploration and production activities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedCapitalizedCostsRelatingToOilAndGasExplorationAndProductionActivitiesDetails</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) - Capitalized costs relating to oil and gas exploration and production activities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</ParentRole>
      <Position>195</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R196.htm</HtmlFileName>
      <LongName>99943902 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) - Costs incurred in oil and gas exploration and developed activities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedCostsIncurredInOilAndGasExplorationAndDevelopedActivitiesDetails</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) - Costs incurred in oil and gas exploration and developed activities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</ParentRole>
      <Position>196</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R197.htm</HtmlFileName>
      <LongName>99943903 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) - Results of operations for oil and gas exploration and production activities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedResultsOfOperationsForOilAndGasExplorationAndProductionActivitiesDetails</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) - Results of operations for oil and gas exploration and production activities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</ParentRole>
      <Position>197</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R198.htm</HtmlFileName>
      <LongName>99943904 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) - Reserve information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedReserveInformationDetails</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) - Reserve information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</ParentRole>
      <Position>198</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R199.htm</HtmlFileName>
      <LongName>99943905 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) - Future net cash flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedFutureNetCashFlowsDetails</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) - Future net cash flows (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</ParentRole>
      <Position>199</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R200.htm</HtmlFileName>
      <LongName>99943906 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) - Discounted net cash flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedDiscountedNetCashFlowsDetails</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) - Discounted net cash flows (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</ParentRole>
      <Position>200</Position>
    </Report>
    <Report instance="ec-20251231x20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R201.htm</HtmlFileName>
      <LongName>99943907 - Disclosure - Supplemental information on oil and gas producing activities (unaudited) - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedAdditionalInformationDetails</Role>
      <ShortName>Supplemental information on oil and gas producing activities (unaudited) - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ecopetrol.com.co/role/DisclosureSupplementalInformationOnOilAndGasProducingActivitiesUnauditedTables</ParentRole>
      <Position>201</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ec-20251231.xsd</File>
    <File>ec-20251231_cal.xml</File>
    <File>ec-20251231_def.xml</File>
    <File>ec-20251231_lab.xml</File>
    <File>ec-20251231_pre.xml</File>
    <File doctype="20-F" isDefinitelyFs="true" isIfrs="true" isUsgaap="true" original="ec-20251231x20f.htm">ec-20251231x20f.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>ec-20251231x20f002.jpg</File>
    <File>ec-20251231x20f003.jpg</File>
    <File>ec-20251231x20f004.jpg</File>
    <File>ec-20251231x20f005.jpg</File>
    <File>ec-20251231x20f009.jpg</File>
    <File>ec-20251231x20f010.jpg</File>
    <File>ec-20251231x20f031.jpg</File>
    <File>ec-20251231x20f032.jpg</File>
    <File>ec-20251231x20f038.jpg</File>
    <File>ec-20251231x20f039.jpg</File>
    <File>ec-20251231x20f040.jpg</File>
    <File>ec-20251231x20f056.jpg</File>
    <File>ec-20251231x20f057.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="14">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="53">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="1">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
    <BaseTaxonomy items="5169">https://xbrl.ifrs.org/taxonomy/2025-03-27/ifrs-full</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
