<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1332</ContextCount>
  <ElementCount>567</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>279</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00000002 - Statement - Consolidated Interim Income Statement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InterimIncomeStatement</Role>
      <ShortName>Consolidated Interim Income Statement</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00000003 - Statement - Consolidated Interim Statement of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InterimStatementOfComprehensiveIncome</Role>
      <ShortName>Consolidated Interim Statement of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00000004 - Statement - Consolidated Interim Statement of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InterimStatementOfCashFlows</Role>
      <ShortName>Consolidated Interim Statement of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00000005 - Statement - Consolidated Interim Statement of Financial Position</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InterimStatementOfFinancialPosition</Role>
      <ShortName>Consolidated Interim Statement of Financial Position</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00000006 - Statement - Consolidated Interim Statement of Changes in Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InterimStatementOfChangesInEquity</Role>
      <ShortName>Consolidated Interim Statement of Changes in Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>999007 - Disclosure - Corporate information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CorporateInformation</Role>
      <ShortName>Corporate information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>999008 - Disclosure - Basis of preparation of condensed consolidated interim financial statements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BasisOfPreparationOfCondensedConsolidatedInterimFinancialStatements</Role>
      <ShortName>Basis of preparation of condensed consolidated interim financial statements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>999009 - Disclosure - Significant events and transaction related to the three-month period ended June 30, 2025</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/SignificantEventsAndTransactionRelatedToThree-monthPeriodEndedJune302025</Role>
      <ShortName>Significant events and transaction related to the three-month period ended June 30, 2025</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>999010 - Disclosure - Information by business segment and geographic area</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InformationByBusinessSegmentAndGeographicArea</Role>
      <ShortName>Information by business segment and geographic area</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>999011 - Disclosure - Costs and expenses by nature</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CostsAndExpensesByNature</Role>
      <ShortName>Costs and expenses by nature</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>999012 - Disclosure - Financial results</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialResults</Role>
      <ShortName>Financial results</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>999013 - Disclosure - Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/Taxes</Role>
      <ShortName>Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>999014 - Disclosure - Basic and diluted earnings per share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BasicAndDilutedEarningsPerShare</Role>
      <ShortName>Basic and diluted earnings per share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>999015 - Disclosure - Cash flows reconciliation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CashFlowsReconciliation</Role>
      <ShortName>Cash flows reconciliation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>999016 - Disclosure - Accounts receivable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AccountsReceivable</Role>
      <ShortName>Accounts receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>999017 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/Inventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>999018 - Disclosure - Suppliers and contractors</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/SuppliersAndContractors</Role>
      <ShortName>Suppliers and contractors</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>999019 - Disclosure - Other financial assets and liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/OtherFinancialAssetsAndLiabilities</Role>
      <ShortName>Other financial assets and liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>999020 - Disclosure - Investments in associates and joint ventures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InvestmentsInAssociatesAndJointVentures</Role>
      <ShortName>Investments in associates and joint ventures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>999021 - Disclosure - Acquisitions and divestitures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AcquisitionsAndDivestitures</Role>
      <ShortName>Acquisitions and divestitures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>999022 - Disclosure - Intangibles</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/Intangibles</Role>
      <ShortName>Intangibles</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>999023 - Disclosure - Property, plant, and equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/PropertyPlantAndEquipment</Role>
      <ShortName>Property, plant, and equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>999024 - Disclosure - Financial and capital risk management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagement</Role>
      <ShortName>Financial and capital risk management</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>999025 - Disclosure - Financial assets and liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAssetsAndLiabilities</Role>
      <ShortName>Financial assets and liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>999026 - Disclosure - Participative shareholders??? debentures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ParticipativeShareholdersDebentures</Role>
      <ShortName>Participative shareholders??? debentures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>999027 - Disclosure - Loans, borrowings, cash and cash equivalents and short-term investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestments</Role>
      <ShortName>Loans, borrowings, cash and cash equivalents and short-term investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>999028 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>999029 - Disclosure - Brumadinho dam failure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BrumadinhoDamFailure</Role>
      <ShortName>Brumadinho dam failure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>999030 - Disclosure - Liabilities related to associates and joint ventures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LiabilitiesRelatedToAssociatesAndJointVentures</Role>
      <ShortName>Liabilities related to associates and joint ventures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>999031 - Disclosure - Provision for de-characterization of dam structures and asset retirement obligations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligations</Role>
      <ShortName>Provision for de-characterization of dam structures and asset retirement obligations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>999032 - Disclosure - Legal proceedings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LegalProceedings</Role>
      <ShortName>Legal proceedings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>999033 - Disclosure - Employee benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EmployeeBenefits</Role>
      <ShortName>Employee benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>999034 - Disclosure - Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/Equity</Role>
      <ShortName>Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>999035 - Disclosure - Related parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/RelatedParties</Role>
      <ShortName>Related parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>999036 - Disclosure - Basis of preparation of condensed consolidated interim financial statements (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BasisOfPreparationOfCondensedConsolidatedInterimFinancialStatementsPolicies</Role>
      <ShortName>Basis of preparation of condensed consolidated interim financial statements (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>999037 - Disclosure - Basis of preparation of condensed consolidated interim financial statements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BasisOfPreparationOfCondensedConsolidatedInterimFinancialStatementsTables</Role>
      <ShortName>Basis of preparation of condensed consolidated interim financial statements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/BasisOfPreparationOfCondensedConsolidatedInterimFinancialStatements</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>999038 - Disclosure - Information by business segment and geographic area (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaTables</Role>
      <ShortName>Information by business segment and geographic area (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/InformationByBusinessSegmentAndGeographicArea</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>999039 - Disclosure - Costs and expenses by nature (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CostsAndExpensesByNatureTables</Role>
      <ShortName>Costs and expenses by nature (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/CostsAndExpensesByNature</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>999040 - Disclosure - Financial results (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialResultsTables</Role>
      <ShortName>Financial results (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialResults</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>999041 - Disclosure - Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/TaxesTables</Role>
      <ShortName>Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/Taxes</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>999042 - Disclosure - Basic and diluted earnings per share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BasicAndDilutedEarningsPerShareTables</Role>
      <ShortName>Basic and diluted earnings per share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/BasicAndDilutedEarningsPerShare</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>999043 - Disclosure - Cash flows reconciliation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CashFlowsReconciliationTables</Role>
      <ShortName>Cash flows reconciliation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/CashFlowsReconciliation</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>999044 - Disclosure - Accounts receivable (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AccountsReceivableTables</Role>
      <ShortName>Accounts receivable (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/AccountsReceivable</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>999045 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/Inventories</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>999046 - Disclosure - Suppliers and contractors (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/SuppliersAndContractorsTables</Role>
      <ShortName>Suppliers and contractors (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/SuppliersAndContractors</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>999047 - Disclosure - Other financial assets and liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/OtherFinancialAssetsAndLiabilitiesTables</Role>
      <ShortName>Other financial assets and liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/OtherFinancialAssetsAndLiabilities</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>999048 - Disclosure - Investments in associates and joint ventures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InvestmentsInAssociatesAndJointVenturesTables</Role>
      <ShortName>Investments in associates and joint ventures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/InvestmentsInAssociatesAndJointVentures</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>999049 - Disclosure - Acquisitions and divestitures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AcquisitionsAndDivestituresTables</Role>
      <ShortName>Acquisitions and divestitures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/AcquisitionsAndDivestitures</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>999050 - Disclosure - Intangibles (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/IntangiblesTables</Role>
      <ShortName>Intangibles (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/Intangibles</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>999051 - Disclosure - Property, plant, and equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/PropertyPlantAndEquipmentTables</Role>
      <ShortName>Property, plant, and equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/PropertyPlantAndEquipment</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>999052 - Disclosure - Financial and capital risk management (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementTables</Role>
      <ShortName>Financial and capital risk management (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagement</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>999053 - Disclosure - Financial assets and liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAssetsAndLiabilitiesTables</Role>
      <ShortName>Financial assets and liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAssetsAndLiabilities</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>999054 - Disclosure - Participative shareholders??? debentures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ParticipativeShareholdersDebenturesTables</Role>
      <ShortName>Participative shareholders??? debentures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/ParticipativeShareholdersDebentures</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>999055 - Disclosure - Loans, borrowings, cash and cash equivalents and short-term investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsTables</Role>
      <ShortName>Loans, borrowings, cash and cash equivalents and short-term investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestments</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>999056 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/Leases</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>999057 - Disclosure - Brumadinho dam failure (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BrumadinhoDamFailureTables</Role>
      <ShortName>Brumadinho dam failure (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/BrumadinhoDamFailure</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>999058 - Disclosure - Liabilities related to associates and joint ventures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LiabilitiesRelatedToAssociatesAndJointVenturesTables</Role>
      <ShortName>Liabilities related to associates and joint ventures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/LiabilitiesRelatedToAssociatesAndJointVentures</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>999059 - Disclosure - Provision for de-characterization of dam structures and asset retirement obligations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsTables</Role>
      <ShortName>Provision for de-characterization of dam structures and asset retirement obligations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligations</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>999060 - Disclosure - Legal proceedings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LegalProceedingsTables</Role>
      <ShortName>Legal proceedings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/LegalProceedings</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>999061 - Disclosure - Employee benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EmployeeBenefitsTables</Role>
      <ShortName>Employee benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/EmployeeBenefits</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>999062 - Disclosure - Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EquityTables</Role>
      <ShortName>Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/Equity</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>999063 - Disclosure - Related parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/RelatedPartiesTables</Role>
      <ShortName>Related parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://vale.com/role/RelatedParties</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>999064 - Disclosure - Basis of preparation of condensed consolidated interim financial statements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BasisOfPreparationOfCondensedConsolidatedInterimFinancialStatementsDetails</Role>
      <ShortName>Basis of preparation of condensed consolidated interim financial statements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/BasisOfPreparationOfCondensedConsolidatedInterimFinancialStatementsTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>999065 - Disclosure - Significant events and transaction related to the three-month period ended June 30, 2025 (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/SignificantEventsAndTransactionRelatedToThree-monthPeriodEndedJune302025DetailsNarrative</Role>
      <ShortName>Significant events and transaction related to the three-month period ended June 30, 2025 (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/SignificantEventsAndTransactionRelatedToThree-monthPeriodEndedJune302025</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>999066 - Disclosure - Information by business segment and geographic area (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaDetails</Role>
      <ShortName>Information by business segment and geographic area (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>999067 - Disclosure - Information by business segment and geographic area (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaDetails1</Role>
      <ShortName>Information by business segment and geographic area (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>999068 - Disclosure - Information by business segment and geographic area (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaDetails2</Role>
      <ShortName>Information by business segment and geographic area (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>999069 - Disclosure - Information by business segment and geographic area (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaDetails3</Role>
      <ShortName>Information by business segment and geographic area (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/InformationByBusinessSegmentAndGeographicAreaTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>999070 - Disclosure - Costs and expenses by nature (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CostsAndExpensesByNatureDetails</Role>
      <ShortName>Costs and expenses by nature (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CostsAndExpensesByNatureTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>999071 - Disclosure - Costs and expenses by nature (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CostsAndExpensesByNatureDetails1</Role>
      <ShortName>Costs and expenses by nature (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CostsAndExpensesByNatureTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>999072 - Disclosure - Costs and expenses by nature (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CostsAndExpensesByNatureDetails2</Role>
      <ShortName>Costs and expenses by nature (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CostsAndExpensesByNatureTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>999073 - Disclosure - Financial results (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialResultsDetails</Role>
      <ShortName>Financial results (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialResultsTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>999074 - Disclosure - Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/TaxesDetails</Role>
      <ShortName>Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/TaxesTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>999075 - Disclosure - Taxes (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/TaxesDetails1</Role>
      <ShortName>Taxes (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/TaxesTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>999076 - Disclosure - Taxes (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/TaxesDetails2</Role>
      <ShortName>Taxes (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/TaxesTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>999077 - Disclosure - Taxes (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/TaxesDetails3</Role>
      <ShortName>Taxes (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/TaxesTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>999078 - Disclosure - Taxes (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/TaxesDetails4</Role>
      <ShortName>Taxes (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/TaxesTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>999079 - Disclosure - Taxes (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/TaxesDetailsNarrative</Role>
      <ShortName>Taxes (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/TaxesTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>999080 - Disclosure - Basic and diluted earnings per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BasicAndDilutedEarningsPerShareDetails</Role>
      <ShortName>Basic and diluted earnings per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/BasicAndDilutedEarningsPerShareTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>999081 - Disclosure - Cash flows reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CashFlowsReconciliationDetails</Role>
      <ShortName>Cash flows reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CashFlowsReconciliationTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>999082 - Disclosure - Cash flows reconciliation (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CashFlowsReconciliationDetails1</Role>
      <ShortName>Cash flows reconciliation (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CashFlowsReconciliationTables</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>999083 - Disclosure - Cash flows reconciliation (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CashFlowsReconciliationDetails2</Role>
      <ShortName>Cash flows reconciliation (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CashFlowsReconciliationTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>999084 - Disclosure - Cash flows reconciliation (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CashFlowsReconciliationDetails3</Role>
      <ShortName>Cash flows reconciliation (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CashFlowsReconciliationTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>999085 - Disclosure - Cash flows reconciliation (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/CashFlowsReconciliationDetailsNarrative</Role>
      <ShortName>Cash flows reconciliation (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/CashFlowsReconciliationTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>999086 - Disclosure - Accounts receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AccountsReceivableDetails</Role>
      <ShortName>Accounts receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/AccountsReceivableTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>999087 - Disclosure - Accounts receivable (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AccountsReceivableDetails1</Role>
      <ShortName>Accounts receivable (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/AccountsReceivableTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>999088 - Disclosure - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InventoriesDetails</Role>
      <ShortName>Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/InventoriesTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>999089 - Disclosure - Suppliers and contractors (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/SuppliersAndContractorsDetails</Role>
      <ShortName>Suppliers and contractors (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/SuppliersAndContractorsTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>999090 - Disclosure - Suppliers and contractors (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/SuppliersAndContractorsDetails1</Role>
      <ShortName>Suppliers and contractors (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/SuppliersAndContractorsTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>999091 - Disclosure - Suppliers and contractors (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/SuppliersAndContractorsDetailsNarrative</Role>
      <ShortName>Suppliers and contractors (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/SuppliersAndContractorsTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>999092 - Disclosure - Other financial assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/OtherFinancialAssetsAndLiabilitiesDetails</Role>
      <ShortName>Other financial assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/OtherFinancialAssetsAndLiabilitiesTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>999093 - Disclosure - Other financial assets and liabilities (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/OtherFinancialAssetsAndLiabilitiesDetails1</Role>
      <ShortName>Other financial assets and liabilities (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/OtherFinancialAssetsAndLiabilitiesTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>999094 - Disclosure - Investments in associates and joint ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/InvestmentsInAssociatesAndJointVenturesDetails</Role>
      <ShortName>Investments in associates and joint ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/InvestmentsInAssociatesAndJointVenturesTables</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>999095 - Disclosure - Acquisitions and divestitures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AcquisitionsAndDivestituresDetails</Role>
      <ShortName>Acquisitions and divestitures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/AcquisitionsAndDivestituresTables</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>999096 - Disclosure - Acquisitions and divestitures - (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AcquisitionsAndDivestitures-Details1</Role>
      <ShortName>Acquisitions and divestitures - (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/AcquisitionsAndDivestituresTables</ParentRole>
      <Position>96</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>999097 - Disclosure - Acquisitions and divestitures - (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AcquisitionsAndDivestitures-Details2</Role>
      <ShortName>Acquisitions and divestitures - (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/AcquisitionsAndDivestituresTables</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>999098 - Disclosure - Acquisitions and divestitures (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/AcquisitionsAndDivestituresDetailsNarrative</Role>
      <ShortName>Acquisitions and divestitures (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/AcquisitionsAndDivestituresTables</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>999099 - Disclosure - Intangibles - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/Intangibles-Details</Role>
      <ShortName>Intangibles - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/IntangiblesTables</ParentRole>
      <Position>99</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>999100 - Disclosure - Property, plant, and equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/PropertyPlantAndEquipmentDetails</Role>
      <ShortName>Property, plant, and equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/PropertyPlantAndEquipmentTables</ParentRole>
      <Position>100</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>999101 - Disclosure - Financial and capital risk management (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails</Role>
      <ShortName>Financial and capital risk management (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>999102 - Disclosure - Financial and capital risk management (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails1</Role>
      <ShortName>Financial and capital risk management (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>999103 - Disclosure - Financial and capital risk management (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails2</Role>
      <ShortName>Financial and capital risk management (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>103</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>999104 - Disclosure - Financial and capital risk management (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails3</Role>
      <ShortName>Financial and capital risk management (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>104</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>999105 - Disclosure - Financial and capital risk management (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails4</Role>
      <ShortName>Financial and capital risk management (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>105</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>999106 - Disclosure - Financial and capital risk management (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails5</Role>
      <ShortName>Financial and capital risk management (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>106</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>999107 - Disclosure - Financial and capital risk management (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails6</Role>
      <ShortName>Financial and capital risk management (Details 6)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>107</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>999108 - Disclosure - Financial and capital risk management (Details 7)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails7</Role>
      <ShortName>Financial and capital risk management (Details 7)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>108</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>999109 - Disclosure - Financial and capital risk management (Details 8)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails8</Role>
      <ShortName>Financial and capital risk management (Details 8)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>109</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>999110 - Disclosure - Financial and capital risk management (Details 9)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails9</Role>
      <ShortName>Financial and capital risk management (Details 9)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>110</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>999111 - Disclosure - Financial and capital risk management (Details 10)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails10</Role>
      <ShortName>Financial and capital risk management (Details 10)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>111</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>999112 - Disclosure - Financial and capital risk management (Details 11)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAndCapitalRiskManagementDetails11</Role>
      <ShortName>Financial and capital risk management (Details 11)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAndCapitalRiskManagementTables</ParentRole>
      <Position>112</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>999113 - Disclosure - Financial assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAssetsAndLiabilitiesDetails</Role>
      <ShortName>Financial assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAssetsAndLiabilitiesTables</ParentRole>
      <Position>113</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>999114 - Disclosure - Financial assets and liabilities (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAssetsAndLiabilitiesDetails1</Role>
      <ShortName>Financial assets and liabilities (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAssetsAndLiabilitiesTables</ParentRole>
      <Position>114</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>999115 - Disclosure - Financial assets and liabilities (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/FinancialAssetsAndLiabilitiesDetails2</Role>
      <ShortName>Financial assets and liabilities (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/FinancialAssetsAndLiabilitiesTables</ParentRole>
      <Position>115</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>999116 - Disclosure - Participative shareholders' debentures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ParticipativeShareholdersDebenturesDetails</Role>
      <ShortName>Participative shareholders' debentures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>999117 - Disclosure - Participative shareholders??? debentures (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ParticipativeShareholdersDebenturesDetailsNarrative</Role>
      <ShortName>Participative shareholders??? debentures (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/ParticipativeShareholdersDebenturesTables</ParentRole>
      <Position>117</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>999118 - Disclosure - Loans, borrowings, cash and cash equivalents and short-term investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsDetails</Role>
      <ShortName>Loans, borrowings, cash and cash equivalents and short-term investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsTables</ParentRole>
      <Position>118</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>999119 - Disclosure - Loans, borrowings, cash and cash equivalents and short-term investments (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsDetails1</Role>
      <ShortName>Loans, borrowings, cash and cash equivalents and short-term investments (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsTables</ParentRole>
      <Position>119</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>999120 - Disclosure - Loans, borrowings, cash and cash equivalents and short-term investments (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsDetails2</Role>
      <ShortName>Loans, borrowings, cash and cash equivalents and short-term investments (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsTables</ParentRole>
      <Position>120</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>999121 - Disclosure - Loans, borrowings, cash and cash equivalents and short-term investments (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsDetails3</Role>
      <ShortName>Loans, borrowings, cash and cash equivalents and short-term investments (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LoansBorrowingsCashAndCashEquivalentsAndShort-termInvestmentsTables</ParentRole>
      <Position>121</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>999122 - Disclosure - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LeasesDetails</Role>
      <ShortName>Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LeasesTables</ParentRole>
      <Position>122</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>999123 - Disclosure - Leases (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LeasesDetails1</Role>
      <ShortName>Leases (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LeasesTables</ParentRole>
      <Position>123</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>999124 - Disclosure - Leases (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LeasesDetails2</Role>
      <ShortName>Leases (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LeasesTables</ParentRole>
      <Position>124</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>999125 - Disclosure - Brumadinho dam failure (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BrumadinhoDamFailureDetails</Role>
      <ShortName>Brumadinho dam failure (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/BrumadinhoDamFailureTables</ParentRole>
      <Position>125</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R126.htm</HtmlFileName>
      <LongName>999126 - Disclosure - Brumadinho dam failure (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BrumadinhoDamFailureDetails1</Role>
      <ShortName>Brumadinho dam failure (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/BrumadinhoDamFailureTables</ParentRole>
      <Position>126</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R127.htm</HtmlFileName>
      <LongName>999127 - Disclosure - Brumadinho dam failure (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/BrumadinhoDamFailureDetailsNarrative</Role>
      <ShortName>Brumadinho dam failure (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/BrumadinhoDamFailureTables</ParentRole>
      <Position>127</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>999128 - Disclosure - Liabilities related to associates and joint ventures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LiabilitiesRelatedToAssociatesAndJointVenturesDetails</Role>
      <ShortName>Liabilities related to associates and joint ventures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LiabilitiesRelatedToAssociatesAndJointVenturesTables</ParentRole>
      <Position>128</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>999129 - Disclosure - Liabilities related to associates and joint ventures (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LiabilitiesRelatedToAssociatesAndJointVenturesDetailsNarrative</Role>
      <ShortName>Liabilities related to associates and joint ventures (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LiabilitiesRelatedToAssociatesAndJointVenturesTables</ParentRole>
      <Position>129</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R130.htm</HtmlFileName>
      <LongName>999130 - Disclosure - Provision for de-characterization of dam structures and asset retirement obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsDetails</Role>
      <ShortName>Provision for de-characterization of dam structures and asset retirement obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsTables</ParentRole>
      <Position>130</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R131.htm</HtmlFileName>
      <LongName>999131 - Disclosure - Provision for de-characterization of dam structures and asset retirement obligations (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsDetails1</Role>
      <ShortName>Provision for de-characterization of dam structures and asset retirement obligations (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsTables</ParentRole>
      <Position>131</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R132.htm</HtmlFileName>
      <LongName>999132 - Disclosure - Provision for de-characterization of dam structures and asset retirement obligations (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsDetails2</Role>
      <ShortName>Provision for de-characterization of dam structures and asset retirement obligations (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsTables</ParentRole>
      <Position>132</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R133.htm</HtmlFileName>
      <LongName>999133 - Disclosure - Provision for de-characterization of dam structures and asset retirement obligations (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsDetailsNarrative</Role>
      <ShortName>Provision for de-characterization of dam structures and asset retirement obligations (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/ProvisionForDe-characterizationOfDamStructuresAndAssetRetirementObligationsTables</ParentRole>
      <Position>133</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R134.htm</HtmlFileName>
      <LongName>999134 - Disclosure - Legal proceedings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LegalProceedingsDetails</Role>
      <ShortName>Legal proceedings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LegalProceedingsTables</ParentRole>
      <Position>134</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R135.htm</HtmlFileName>
      <LongName>999135 - Disclosure - Legal proceedings (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LegalProceedingsDetails1</Role>
      <ShortName>Legal proceedings (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LegalProceedingsTables</ParentRole>
      <Position>135</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R136.htm</HtmlFileName>
      <LongName>999136 - Disclosure - Legal proceedings (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LegalProceedingsDetails2</Role>
      <ShortName>Legal proceedings (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LegalProceedingsTables</ParentRole>
      <Position>136</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R137.htm</HtmlFileName>
      <LongName>999137 - Disclosure - Legal proceedings (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LegalProceedingsDetails3</Role>
      <ShortName>Legal proceedings (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LegalProceedingsTables</ParentRole>
      <Position>137</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R138.htm</HtmlFileName>
      <LongName>999138 - Disclosure - Legal proceedings (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/LegalProceedingsDetailsNarrative</Role>
      <ShortName>Legal proceedings (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/LegalProceedingsTables</ParentRole>
      <Position>138</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R139.htm</HtmlFileName>
      <LongName>999139 - Disclosure - Employee benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EmployeeBenefitsDetails</Role>
      <ShortName>Employee benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/EmployeeBenefitsTables</ParentRole>
      <Position>139</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R140.htm</HtmlFileName>
      <LongName>999140 - Disclosure - Employee benefits (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EmployeeBenefitsDetails1</Role>
      <ShortName>Employee benefits (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/EmployeeBenefitsTables</ParentRole>
      <Position>140</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R141.htm</HtmlFileName>
      <LongName>999141 - Disclosure - Employee benefits (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EmployeeBenefitsDetails2</Role>
      <ShortName>Employee benefits (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/EmployeeBenefitsTables</ParentRole>
      <Position>141</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R142.htm</HtmlFileName>
      <LongName>999142 - Disclosure - Employee benefits (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EmployeeBenefitsDetails3</Role>
      <ShortName>Employee benefits (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/EmployeeBenefitsTables</ParentRole>
      <Position>142</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R143.htm</HtmlFileName>
      <LongName>999143 - Disclosure - Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EquityDetails</Role>
      <ShortName>Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/EquityTables</ParentRole>
      <Position>143</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R144.htm</HtmlFileName>
      <LongName>999144 - Disclosure - Equity (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EquityDetails1</Role>
      <ShortName>Equity (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/EquityTables</ParentRole>
      <Position>144</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R145.htm</HtmlFileName>
      <LongName>999145 - Disclosure - Equity (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/EquityDetailsNarrative</Role>
      <ShortName>Equity (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/EquityTables</ParentRole>
      <Position>145</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R146.htm</HtmlFileName>
      <LongName>999146 - Disclosure - Related parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/RelatedPartiesDetails</Role>
      <ShortName>Related parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/RelatedPartiesTables</ParentRole>
      <Position>146</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R147.htm</HtmlFileName>
      <LongName>999147 - Disclosure - Related parties (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/RelatedPartiesDetails1</Role>
      <ShortName>Related parties (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/RelatedPartiesTables</ParentRole>
      <Position>147</Position>
    </Report>
    <Report instance="valedfifrs2q25_6ka.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R148.htm</HtmlFileName>
      <LongName>999148 - Disclosure - Related parties (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://vale.com/role/RelatedPartiesDetailsNarrative</Role>
      <ShortName>Related parties (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://vale.com/role/RelatedPartiesTables</ParentRole>
      <Position>148</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>vale-20250830.xsd</File>
    <File>vale-20250830_cal.xml</File>
    <File>vale-20250830_def.xml</File>
    <File>vale-20250830_lab.xml</File>
    <File>vale-20250830_pre.xml</File>
    <File doctype="6-K/A" isDefinitelyFs="true" isIfrs="true" original="valedfifrs2q25_6ka.htm">valedfifrs2q25_6ka.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>valedfifrs2q256k_001.jpg</File>
    <File>valedfifrs2q256k_002.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/dei/2024</BaseTaxonomy>
    <BaseTaxonomy items="1992">https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
