<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>367</ContextCount>
  <ElementCount>400</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>106</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CONSOLIDATEDBALANCESHEETS</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0000003 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CONSOLIDATEDBALANCESHEETSParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0000004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOMELOSS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0000005 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOMELOSSParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0000006 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN MEZZANINE EQUITY AND SHAREHOLDERS??? EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINMEZZANINEEQUITYANDSHAREHOLDERSEQUITY</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN MEZZANINE EQUITY AND SHAREHOLDERS??? EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0000007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0000008 - Disclosure - Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/Organization</Role>
      <ShortName>Organization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0000009 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciples</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0000010 - Disclosure - Recently Issued Accounting Standards</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RecentlyIssuedAccountingStandards</Role>
      <ShortName>Recently Issued Accounting Standards</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0000011 - Disclosure - Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/Transactions</Role>
      <ShortName>Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0000012 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0000013 - Disclosure - Credit Losses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CreditLosses</Role>
      <ShortName>Credit Losses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0000014 - Disclosure - Property and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/PropertyandEquipmentNet</Role>
      <ShortName>Property and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0000015 - Disclosure - Goodwill and Intangible Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/GoodwillandIntangibleAssetsNet</Role>
      <ShortName>Goodwill and Intangible Assets, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0000016 - Disclosure - Long-term Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LongtermDebt</Role>
      <ShortName>Long-term Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0000017 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0000018 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0000019 - Disclosure - Convertible Preferred Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/ConvertiblePreferredEquity</Role>
      <ShortName>Convertible Preferred Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>0000020 - Disclosure - Loss Per Common Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LossPerCommonShare</Role>
      <ShortName>Loss Per Common Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>0000021 - Disclosure - Stock-based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/StockbasedCompensation</Role>
      <ShortName>Stock-based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>0000022 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>0000023 - Disclosure - Investments in Equity Method Investees</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/InvestmentsinEquityMethodInvestees</Role>
      <ShortName>Investments in Equity Method Investees</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>0000024 - Disclosure - Fair Value Measurement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/FairValueMeasurement</Role>
      <ShortName>Fair Value Measurement</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>0000025 - Disclosure - Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RelatedParties</Role>
      <ShortName>Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>0000026 - Disclosure - Repositioning and Other Changes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RepositioningandOtherChanges</Role>
      <ShortName>Repositioning and Other Changes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>0000027 - Disclosure - Reserves for Claims and Performance-Based Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/ReservesforClaimsandPerformanceBasedArrangements</Role>
      <ShortName>Reserves for Claims and Performance-Based Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>0000028 - Disclosure - Supplemental Cash Flow Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/SupplementalCashFlowInformation</Role>
      <ShortName>Supplemental Cash Flow Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>0000029 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9954701 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesPolicies</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciples</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9954702 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesTables</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciples</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9954703 - Disclosure - Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/TransactionsTables</Role>
      <ShortName>Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/Transactions</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9954704 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/RevenueRecognition</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9954705 - Disclosure - Credit Losses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CreditLossesTables</Role>
      <ShortName>Credit Losses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/CreditLosses</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9954706 - Disclosure - Property and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/PropertyandEquipmentNetTables</Role>
      <ShortName>Property and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/PropertyandEquipmentNet</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9954707 - Disclosure - Goodwill and Intangible Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/GoodwillandIntangibleAssetsNetTables</Role>
      <ShortName>Goodwill and Intangible Assets, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/GoodwillandIntangibleAssetsNet</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9954708 - Disclosure - Long-term Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LongtermDebtTables</Role>
      <ShortName>Long-term Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/LongtermDebt</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9954709 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CommitmentsandContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/CommitmentsandContingencies</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9954710 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/Leases</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9954711 - Disclosure - Loss Per Common Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LossPerCommonShareTables</Role>
      <ShortName>Loss Per Common Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/LossPerCommonShare</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9954712 - Disclosure - Stock-based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/StockbasedCompensationTables</Role>
      <ShortName>Stock-based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/StockbasedCompensation</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9954713 - Disclosure - Fair Value Measurement (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/FairValueMeasurementTables</Role>
      <ShortName>Fair Value Measurement (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/FairValueMeasurement</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9954714 - Disclosure - Related Parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RelatedPartiesTables</Role>
      <ShortName>Related Parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/RelatedParties</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9954715 - Disclosure - Repositioning and Other Changes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RepositioningandOtherChangesTables</Role>
      <ShortName>Repositioning and Other Changes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/RepositioningandOtherChanges</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9954716 - Disclosure - Reserves for Claims and Performance-Based Arrangements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/ReservesforClaimsandPerformanceBasedArrangementsTables</Role>
      <ShortName>Reserves for Claims and Performance-Based Arrangements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/ReservesforClaimsandPerformanceBasedArrangements</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9954717 - Disclosure - Supplemental Cash Flow Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/SupplementalCashFlowInformationTables</Role>
      <ShortName>Supplemental Cash Flow Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/SupplementalCashFlowInformation</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9954718 - Disclosure - Organization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/OrganizationDetails</Role>
      <ShortName>Organization (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/Organization</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9954719 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Restricted Cash and Restricted Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesRestrictedCashandRestrictedInvestmentsDetails</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Restricted Cash and Restricted Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9954720 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Cash Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesCashReconciliationDetails</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Cash Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9954721 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Intangible Assets, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesIntangibleAssetsNetDetails</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Intangible Assets, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9954722 - Disclosure - Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesAdditionalInformationDetails</Role>
      <ShortName>Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/BasisofPresentationSummaryofSignificantAccountingPoliciesandChangeinAccountingPrinciplesTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9954723 - Disclosure - Recently Issued Accounting Standards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RecentlyIssuedAccountingStandardsDetails</Role>
      <ShortName>Recently Issued Accounting Standards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/RecentlyIssuedAccountingStandards</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9954724 - Disclosure - Transactions - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/TransactionsNarrativeDetails</Role>
      <ShortName>Transactions - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9954725 - Disclosure - Transactions - Allocation of Acquisition Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/TransactionsAllocationofAcquisitionCostDetails</Role>
      <ShortName>Transactions - Allocation of Acquisition Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9954726 - Disclosure - Transactions - Pro Forma Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/TransactionsProFormaInformationDetails</Role>
      <ShortName>Transactions - Pro Forma Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9954727 - Disclosure - Revenue Recognition - Disaggregation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RevenueRecognitionDisaggregationofRevenueDetails</Role>
      <ShortName>Revenue Recognition - Disaggregation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9954728 - Disclosure - Revenue Recognition - Transaction Price Allocated to the Remaining Performance Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RevenueRecognitionTransactionPriceAllocatedtotheRemainingPerformanceObligationsDetails</Role>
      <ShortName>Revenue Recognition - Transaction Price Allocated to the Remaining Performance Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9954729 - Disclosure - Revenue Recognition - Contract Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RevenueRecognitionContractBalancesDetails</Role>
      <ShortName>Revenue Recognition - Contract Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9954730 - Disclosure - Revenue Recognition - Contract Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RevenueRecognitionContractCostsDetails</Role>
      <ShortName>Revenue Recognition - Contract Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9954731 - Disclosure - Credit Losses - Accounts Receivable (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CreditLossesAccountsReceivableNarrativeDetails</Role>
      <ShortName>Credit Losses - Accounts Receivable (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9954732 - Disclosure - Credit Losses - Schedule of Changes in Allowance for Accounts Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CreditLossesScheduleofChangesinAllowanceforAccountsReceivableDetails</Role>
      <ShortName>Credit Losses - Schedule of Changes in Allowance for Accounts Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9954733 - Disclosure - Property and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/PropertyandEquipmentNetDetails</Role>
      <ShortName>Property and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/PropertyandEquipmentNetTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9954734 - Disclosure - Goodwill and Intangible Assets, Net - Impairment Testing (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/GoodwillandIntangibleAssetsNetImpairmentTestingDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Impairment Testing (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9954735 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/GoodwillandIntangibleAssetsNetScheduleofGoodwillDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Schedule of Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9954736 - Disclosure - Goodwill and Intangible Assets, Net - Intangible Assets, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/GoodwillandIntangibleAssetsNetIntangibleAssetsNetDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Intangible Assets, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9954737 - Disclosure - Goodwill and Intangible Assets, Net - Amortization of Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/GoodwillandIntangibleAssetsNetAmortizationofIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Intangible Assets, Net - Amortization of Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9954738 - Disclosure - Long-term Debt - 2022 Credit Agreement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LongtermDebt2022CreditAgreementDetails</Role>
      <ShortName>Long-term Debt - 2022 Credit Agreement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9954739 - Disclosure - Long-term Debt - 2024 Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.evolenthealth.com/role/LongtermDebt2024NotesDetails</Role>
      <ShortName>Long-term Debt - 2024 Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9954740 - Disclosure - Long-term Debt - 2025 Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.evolenthealth.com/role/LongtermDebt2025NotesDetails</Role>
      <ShortName>Long-term Debt - 2025 Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9954741 - Disclosure - Long-term Debt - Convertible Senior Notes Carrying Value (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.evolenthealth.com/role/LongtermDebtConvertibleSeniorNotesCarryingValueDetails</Role>
      <ShortName>Long-term Debt - Convertible Senior Notes Carrying Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9954742 - Disclosure - Commitments and Contingencies - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CommitmentsandContingenciesAdditionalInformationDetails</Role>
      <ShortName>Commitments and Contingencies - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9954743 - Disclosure - Commitments and Contingencies - Credit and Concentration Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/CommitmentsandContingenciesCreditandConcentrationRiskDetails</Role>
      <ShortName>Commitments and Contingencies - Credit and Concentration Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9954744 - Disclosure - Leases - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9954745 - Disclosure - Leases - Primary Office Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LeasesPrimaryOfficeLeasesDetails</Role>
      <ShortName>Leases - Primary Office Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9954746 - Disclosure - Leases - Components of Lease Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LeasesComponentsofLeaseExpenseDetails</Role>
      <ShortName>Leases - Components of Lease Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9954747 - Disclosure - Leases - Maturity of Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LeasesMaturityofLeaseLiabilitiesDetails</Role>
      <ShortName>Leases - Maturity of Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9954748 - Disclosure - Leases - Weighted-average Discount Rate and Weighted-remaining Lease Terms (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LeasesWeightedaverageDiscountRateandWeightedremainingLeaseTermsDetails</Role>
      <ShortName>Leases - Weighted-average Discount Rate and Weighted-remaining Lease Terms (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9954749 - Disclosure - Convertible Preferred Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/ConvertiblePreferredEquityDetails</Role>
      <ShortName>Convertible Preferred Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/ConvertiblePreferredEquity</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9954750 - Disclosure - Loss Per Common Share - Computation of Earnings per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LossPerCommonShareComputationofEarningsperShareDetails</Role>
      <ShortName>Loss Per Common Share - Computation of Earnings per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9954751 - Disclosure - Loss Per Common Share - Antidilutive Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/LossPerCommonShareAntidilutiveSecuritiesDetails</Role>
      <ShortName>Loss Per Common Share - Antidilutive Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9954752 - Disclosure - Stock-based Compensation - Stock-based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/StockbasedCompensationStockbasedCompensationExpenseDetails</Role>
      <ShortName>Stock-based Compensation - Stock-based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9954753 - Disclosure - Stock-based Compensation - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/StockbasedCompensationAdditionalInformationDetails</Role>
      <ShortName>Stock-based Compensation - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9954754 - Disclosure - Stock-based Compensation - Schedule of Stock-Based Awards Granted (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/StockbasedCompensationScheduleofStockBasedAwardsGrantedDetails</Role>
      <ShortName>Stock-based Compensation - Schedule of Stock-Based Awards Granted (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9954755 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/IncomeTaxes</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9954756 - Disclosure - Investments in Equity Method Investees (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/InvestmentsinEquityMethodInvesteesDetails</Role>
      <ShortName>Investments in Equity Method Investees (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/InvestmentsinEquityMethodInvestees</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9954757 - Disclosure - Fair Value Measurement - Assets and Liabilities on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/FairValueMeasurementAssetsandLiabilitiesonRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurement - Assets and Liabilities on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9954758 - Disclosure - Fair Value Measurement - Changes in Contingent Consideration and Other (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/FairValueMeasurementChangesinContingentConsiderationandOtherDetails</Role>
      <ShortName>Fair Value Measurement - Changes in Contingent Consideration and Other (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9954759 - Disclosure - Fair Value Measurement - Valuation Techniques and Significant Unobservable Inputs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/FairValueMeasurementValuationTechniquesandSignificantUnobservableInputsDetails</Role>
      <ShortName>Fair Value Measurement - Valuation Techniques and Significant Unobservable Inputs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9954760 - Disclosure - Related Parties - Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RelatedPartiesAssetsandLiabilitiesDetails</Role>
      <ShortName>Related Parties - Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9954761 - Disclosure - Related Parties - Revenues and Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RelatedPartiesRevenuesandExpensesDetails</Role>
      <ShortName>Related Parties - Revenues and Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9954762 - Disclosure - Repositioning and Other Changes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/RepositioningandOtherChangesDetails</Role>
      <ShortName>Repositioning and Other Changes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/RepositioningandOtherChangesTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9954763 - Disclosure - Reserves for Claims and Performance-Based Arrangements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/ReservesforClaimsandPerformanceBasedArrangementsDetails</Role>
      <ShortName>Reserves for Claims and Performance-Based Arrangements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/ReservesforClaimsandPerformanceBasedArrangementsTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9954764 - Disclosure - Supplemental Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/SupplementalCashFlowInformationDetails</Role>
      <ShortName>Supplemental Cash Flow Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/SupplementalCashFlowInformationTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9954765 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.evolenthealth.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.evolenthealth.com/role/SubsequentEvents</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="evh-20230630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9999.htm</HtmlFileName>
      <LongName>Uncategorized Items - evh-20230630.htm</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/role/uncategorizedFacts</Role>
      <ShortName>Uncategorized Items - evh-20230630.htm</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 6 fact(s) appearing in ix:hidden were eligible for transformation: us-gaap:DebtInstrumentConvertibleConversionRatio1, us-gaap:RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1 -  evh-20230630.htm 4</Log>
  </Logs>
  <InputFiles>
    <File doctype="10-Q" original="evh-20230630.htm">evh-20230630.htm</File>
    <File>a63023exhibit311.htm</File>
    <File>a63023exhibit312.htm</File>
    <File>a63023exhibit321.htm</File>
    <File>a63023exhibit322.htm</File>
    <File>evh-20230630.xsd</File>
    <File>evh-20230630_cal.xml</File>
    <File>evh-20230630_def.xml</File>
    <File>evh-20230630_lab.xml</File>
    <File>evh-20230630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1117">http://fasb.org/us-gaap/2023</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2023</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
