<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>175</ContextCount>
  <ElementCount>324</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>60</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>12</UnitCount>
  <MyReports>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>9952151 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/CondensedConsolidatedStatementsofOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952152 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/CondensedConsolidatedStatementsofCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952153 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952154 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952155 - Statement - Condensed Consolidated Statement of Changes in Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/CondensedConsolidatedStatementofChangesinEquity</Role>
      <ShortName>Condensed Consolidated Statement of Changes in Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952156 - Disclosure - THE COMPANY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/THECOMPANY</Role>
      <ShortName>THE COMPANY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952157 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - ACQUISITIONS AND DIVESTITURES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACQUISITIONSANDDIVESTITURES</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - HELD FOR SALE AND DISCONTINUED OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/HELDFORSALEANDDISCONTINUEDOPERATIONS</Role>
      <ShortName>HELD FOR SALE AND DISCONTINUED OPERATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - OPERATING??SEGMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OPERATINGSEGMENTS</Role>
      <ShortName>OPERATING??SEGMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - REVENUE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/REVENUE</Role>
      <ShortName>REVENUE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - OTHER OPERATING EXPENSE (INCOME), NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OTHEROPERATINGEXPENSEINCOMENET</Role>
      <ShortName>OTHER OPERATING EXPENSE (INCOME), NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - OTHER INCOME (EXPENSE)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OTHERINCOMEEXPENSE</Role>
      <ShortName>OTHER INCOME (EXPENSE)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - INCOME AND MINING TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INCOMEANDMININGTAXES</Role>
      <ShortName>INCOME AND MINING TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - INCOME (LOSS) PER SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INCOMELOSSPERSHARE</Role>
      <ShortName>INCOME (LOSS) PER SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTS</Role>
      <ShortName>FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - TRADE AND OTHER RECEIVABLES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/TRADEANDOTHERRECEIVABLES</Role>
      <ShortName>TRADE AND OTHER RECEIVABLES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - INVENTORIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INVENTORIES</Role>
      <ShortName>INVENTORIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/MINERALPROPERTIESPLANTANDEQUIPMENTNET</Role>
      <ShortName>MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - ACCRUED LIABILITIES AND OTHER</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACCRUEDLIABILITIESANDOTHER</Role>
      <ShortName>ACCRUED LIABILITIES AND OTHER</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/DEBT</Role>
      <ShortName>DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/EQUITY</Role>
      <ShortName>EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUPPLEMENTALCASHFLOWINFORMATION</Role>
      <ShortName>SUPPLEMENTAL CASH FLOW INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/RELATEDPARTYTRANSACTIONS</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/COMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUBSEQUENTEVENTS</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - ACQUISITIONS AND DIVESTITURES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACQUISITIONSANDDIVESTITURESTables</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/ACQUISITIONSANDDIVESTITURES</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - HELD FOR SALE AND DISCONTINUED OPERATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/HELDFORSALEANDDISCONTINUEDOPERATIONSTables</Role>
      <ShortName>HELD FOR SALE AND DISCONTINUED OPERATIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/HELDFORSALEANDDISCONTINUEDOPERATIONS</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - OPERATING??SEGMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OPERATINGSEGMENTSTables</Role>
      <ShortName>OPERATING??SEGMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/OPERATINGSEGMENTS</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - REVENUE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/REVENUETables</Role>
      <ShortName>REVENUE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/REVENUE</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - OTHER OPERATING EXPENSE (INCOME), NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OTHEROPERATINGEXPENSEINCOMENETTables</Role>
      <ShortName>OTHER OPERATING EXPENSE (INCOME), NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/OTHEROPERATINGEXPENSEINCOMENET</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - OTHER INCOME (EXPENSE) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OTHERINCOMEEXPENSETables</Role>
      <ShortName>OTHER INCOME (EXPENSE) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/OTHERINCOMEEXPENSE</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - INCOME (LOSS) PER SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INCOMELOSSPERSHARETables</Role>
      <ShortName>INCOME (LOSS) PER SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/INCOMEANDMININGTAXES</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTS</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - TRADE AND OTHER RECEIVABLES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/TRADEANDOTHERRECEIVABLESTables</Role>
      <ShortName>TRADE AND OTHER RECEIVABLES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/TRADEANDOTHERRECEIVABLES</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - INVENTORIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INVENTORIESTables</Role>
      <ShortName>INVENTORIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/INVENTORIES</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/MINERALPROPERTIESPLANTANDEQUIPMENTNETTables</Role>
      <ShortName>MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/MINERALPROPERTIESPLANTANDEQUIPMENTNET</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - ACCRUED LIABILITIES AND OTHER (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACCRUEDLIABILITIESANDOTHERTables</Role>
      <ShortName>ACCRUED LIABILITIES AND OTHER (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/ACCRUEDLIABILITIESANDOTHER</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/DEBTTables</Role>
      <ShortName>DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/DEBT</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUPPLEMENTALCASHFLOWINFORMATIONTables</Role>
      <ShortName>SUPPLEMENTAL CASH FLOW INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/SUPPLEMENTALCASHFLOWINFORMATION</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - THE COMPANY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/THECOMPANYDetails</Role>
      <ShortName>THE COMPANY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/THECOMPANY</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - ACQUISITIONS AND DIVESTITURES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACQUISITIONSANDDIVESTITURESNarrativeDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - ACQUISITIONS AND DIVESTITURES - Acquisition Date Fair Value of the Consideration Transferred (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACQUISITIONSANDDIVESTITURESAcquisitionDateFairValueoftheConsiderationTransferredDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Acquisition Date Fair Value of the Consideration Transferred (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - ACQUISITIONS AND DIVESTITURES - Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACQUISITIONSANDDIVESTITURESAssetsAcquiredandLiabilitiesAssumedDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - ACQUISITIONS AND DIVESTITURES - Business Acquisition, Pro Forma Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACQUISITIONSANDDIVESTITURESBusinessAcquisitionProFormaInformationDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Business Acquisition, Pro Forma Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - HELD FOR SALE AND DISCONTINUED OPERATIONS - Statements of Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/HELDFORSALEANDDISCONTINUEDOPERATIONSStatementsofOperationsDetails</Role>
      <ShortName>HELD FOR SALE AND DISCONTINUED OPERATIONS - Statements of Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - HELD FOR SALE AND DISCONTINUED OPERATIONS - Consolidated Balance Sheets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/HELDFORSALEANDDISCONTINUEDOPERATIONSConsolidatedBalanceSheetsDetails</Role>
      <ShortName>HELD FOR SALE AND DISCONTINUED OPERATIONS - Consolidated Balance Sheets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - OPERATING??SEGMENTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OPERATINGSEGMENTSNarrativeDetails</Role>
      <ShortName>OPERATING??SEGMENTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - OPERATING??SEGMENTS - Disaggregation of Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OPERATINGSEGMENTSDisaggregationofSegmentsDetails</Role>
      <ShortName>OPERATING??SEGMENTS - Disaggregation of Segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - REVENUE - Revenue by Product (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/REVENUERevenuebyProductDetails</Role>
      <ShortName>REVENUE - Revenue by Product (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - REVENUE - Revenue by Metal (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/REVENUERevenuebyMetalDetails</Role>
      <ShortName>REVENUE - Revenue by Metal (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - REVENUE - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/REVENUENarrativeDetails</Role>
      <ShortName>REVENUE - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - OTHER OPERATING EXPENSE (INCOME), NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OTHEROPERATINGEXPENSEINCOMENETDetails</Role>
      <ShortName>OTHER OPERATING EXPENSE (INCOME), NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/OTHEROPERATINGEXPENSEINCOMENETTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - OTHER INCOME (EXPENSE) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/OTHERINCOMEEXPENSEDetails</Role>
      <ShortName>OTHER INCOME (EXPENSE) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/OTHERINCOMEEXPENSETables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - INCOME AND MINING TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INCOMEANDMININGTAXESDetails</Role>
      <ShortName>INCOME AND MINING TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/INCOMEANDMININGTAXES</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - INCOME (LOSS) PER SHARE - Calculation of Basic and Diluted Net Income (Loss) Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INCOMELOSSPERSHARECalculationofBasicandDilutedNetIncomeLossPerShareDetails</Role>
      <ShortName>INCOME (LOSS) PER SHARE - Calculation of Basic and Diluted Net Income (Loss) Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/INCOMELOSSPERSHARETables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - INCOME (LOSS) PER SHARE - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INCOMELOSSPERSHARENarrativeDetails</Role>
      <ShortName>INCOME (LOSS) PER SHARE - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/INCOMELOSSPERSHARETables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSAssetsandLiabilitiesDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Fair Value of Significant Unobservable Inputs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSFairValueofSignificantUnobservableInputsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Fair Value of Significant Unobservable Inputs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSDebtDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - TRADE AND OTHER RECEIVABLES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/TRADEANDOTHERRECEIVABLESDetails</Role>
      <ShortName>TRADE AND OTHER RECEIVABLES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/TRADEANDOTHERRECEIVABLESTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - INVENTORIES - Components of Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INVENTORIESComponentsofInventoriesDetails</Role>
      <ShortName>INVENTORIES - Components of Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - INVENTORIES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/INVENTORIESNarrativeDetails</Role>
      <ShortName>INVENTORIES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET - Components of Mineral Properties, Plant and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/MINERALPROPERTIESPLANTANDEQUIPMENTNETComponentsofMineralPropertiesPlantandEquipmentNetDetails</Role>
      <ShortName>MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET - Components of Mineral Properties, Plant and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/MINERALPROPERTIESPLANTANDEQUIPMENTNETNarrativeDetails</Role>
      <ShortName>MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - ACCRUED LIABILITIES AND OTHER (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/ACCRUEDLIABILITIESANDOTHERDetails</Role>
      <ShortName>ACCRUED LIABILITIES AND OTHER (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/ACCRUEDLIABILITIESANDOTHERTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - DEBT - Debt Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/DEBTDebtBalancesDetails</Role>
      <ShortName>DEBT - Debt Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - DEBT - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/DEBTNarrativeDetails</Role>
      <ShortName>DEBT - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - EQUITY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/EQUITYDetails</Role>
      <ShortName>EQUITY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/EQUITY</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION - Operating Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUPPLEMENTALCASHFLOWINFORMATIONOperatingAssetsandLiabilitiesDetails</Role>
      <ShortName>SUPPLEMENTAL CASH FLOW INFORMATION - Operating Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION - Other Cash Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUPPLEMENTALCASHFLOWINFORMATIONOtherCashInformationDetails</Role>
      <ShortName>SUPPLEMENTAL CASH FLOW INFORMATION - Other Cash Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - RELATED PARTY TRANSACTIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/RELATEDPARTYTRANSACTIONSDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/RELATEDPARTYTRANSACTIONS</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/COMMITMENTSANDCONTINGENCIESDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/COMMITMENTSANDCONTINGENCIES</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="ssrm-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - SUBSEQUENT EVENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ssrmining.com/role/SUBSEQUENTEVENTSDetails</Role>
      <ShortName>SUBSEQUENT EVENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ssrmining.com/role/SUBSEQUENTEVENTS</ParentRole>
      <Position>77</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ssrm-20260331.htm">ssrm-20260331.htm</File>
    <File>ssrm-20260331.xsd</File>
    <File>ssrm-20260331_cal.xml</File>
    <File>ssrm-20260331_def.xml</File>
    <File>ssrm-20260331_lab.xml</File>
    <File>ssrm-20260331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="2">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="903">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
