<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>112</ContextCount>
  <ElementCount>288</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>33</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010 - Statement - Condensed Consolidated Balance Sheets (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnaudited</Role>
      <ShortName>Condensed Consolidated Balance Sheets (unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100030 - Statement - Condensed Consolidated Balance Sheets (unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnauditedParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100040 - Statement - Condensed Consolidated Statements of Operations (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperationsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Operations (unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100050 - Statement - Condensed Consolidated Statements of Operations (unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperationsUnauditedParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Operations (unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100060 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfComprehensiveIncomeUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100070 - Statement - Condensed Consolidated Statements of Changes in Equity (Deficit) (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfChangesInEquityDeficitUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Equity (Deficit) (unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100080 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100090 - Disclosure - Organization and Description of Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureOrganizationAndDescriptionOfBusiness</Role>
      <ShortName>Organization and Description of Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>100100 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>100110 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureRevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>100120 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>100130 - Disclosure - Supplemental Consolidated Balance Sheet Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSupplementalConsolidatedBalanceSheetInformation</Role>
      <ShortName>Supplemental Consolidated Balance Sheet Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>100140 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>100150 - Disclosure - Non-controlling Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureNoncontrollingInterest1</Role>
      <ShortName>Non-controlling Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>100160 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>100170 - Disclosure - Equity-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEquitybasedCompensation1</Role>
      <ShortName>Equity-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>100190 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureIncomeTaxes1</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>100200 - Disclosure - Transactions with Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureTransactionsWithRelatedParties1</Role>
      <ShortName>Transactions with Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>100210 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>100220 - Disclosure - Organization and Description of Business (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureOrganizationAndDescriptionOfBusinessTables</Role>
      <ShortName>Organization and Description of Business (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureOrganizationAndDescriptionOfBusiness</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>100240 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureRevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureRevenueRecognition</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>100250 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>100260 - Disclosure - Supplemental Consolidated Balance Sheet Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSupplementalConsolidatedBalanceSheetInformationTables</Role>
      <ShortName>Supplemental Consolidated Balance Sheet Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSupplementalConsolidatedBalanceSheetInformation</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>100270 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeases</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>100280 - Disclosure - Non-controlling Interest (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureNoncontrollingInterestTables</Role>
      <ShortName>Non-controlling Interest (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureNoncontrollingInterest1</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>100290 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEarningsPerShare</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>100300 - Disclosure - Equity-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEquitybasedCompensationTables</Role>
      <ShortName>Equity-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEquitybasedCompensation1</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>100310 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>100320 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureIncomeTaxes1</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>100330 - Disclosure - Organization and Description of Business - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureOrganizationAndDescriptionOfBusinessAdditionalInformationDetails</Role>
      <ShortName>Organization and Description of Business - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>100340 - Disclosure - Organization and Description of Business - Summary of Classes of Common Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureOrganizationAndDescriptionOfBusinessSummaryOfClassesOfCommonStockDetails</Role>
      <ShortName>Organization and Description of Business - Summary of Classes of Common Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>100350 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies- Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies- Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100360 - Disclosure - Revenue Recognition - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureRevenueRecognitionAdditionalInformationDetails</Role>
      <ShortName>Revenue Recognition - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>100370 - Disclosure - Revenue Recognition - Additional Information 1 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureRevenueRecognitionAdditionalInformation1Details</Role>
      <ShortName>Revenue Recognition - Additional Information 1 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>100380 - Disclosure - Revenue Recognition - Summary of Revenue Disaggregated by Geography (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueDisaggregatedByGeographyDetails</Role>
      <ShortName>Revenue Recognition - Summary of Revenue Disaggregated by Geography (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>100390 - Disclosure - Fair Value Measurements - Summary of Financial Assets Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueDetails</Role>
      <ShortName>Fair Value Measurements - Summary of Financial Assets Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>100400 - Disclosure - Fair Value Measurements - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails</Role>
      <ShortName>Fair Value Measurements - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>100410 - Disclosure - Supplemental Consolidated Balance Sheet Information - Schedule of Accounts Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSupplementalConsolidatedBalanceSheetInformationScheduleOfAccountsReceivableNetDetails</Role>
      <ShortName>Supplemental Consolidated Balance Sheet Information - Schedule of Accounts Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>100420 - Disclosure - Supplemental Consolidated Balance Sheet Information - Schedule of Prepaid Expenses and Other Current Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSupplementalConsolidatedBalanceSheetInformationScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails</Role>
      <ShortName>Supplemental Consolidated Balance Sheet Information - Schedule of Prepaid Expenses and Other Current Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>100460 - Disclosure - Supplemental Consolidated Balance Sheet Information - Schedule of Accrued Expenses and Other Current Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSupplementalConsolidatedBalanceSheetInformationScheduleOfAccruedExpensesAndOtherCurrentLiabilitiesDetails</Role>
      <ShortName>Supplemental Consolidated Balance Sheet Information - Schedule of Accrued Expenses and Other Current Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>100480 - Disclosure - Leases - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeasesAdditionalInformationDetails</Role>
      <ShortName>Leases - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>100490 - Disclosure - Leases - Schedule of Future Minimum Lease Payments under Non-cancellable Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeasesScheduleOfFutureMinimumLeasePaymentsUnderNoncancellableLeasesDetails</Role>
      <ShortName>Leases - Schedule of Future Minimum Lease Payments under Non-cancellable Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>100500 - Disclosure - Leases - Schedule of Future Minimum Lease Payments under Non-cancellable Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeasesScheduleOfFutureMinimumLeasePaymentsUnderNoncancellableOperatingLeasesDetails</Role>
      <ShortName>Leases - Schedule of Future Minimum Lease Payments under Non-cancellable Operating Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>100510 - Disclosure - Leases - Schedule of Supplemental Information for Non-cancellable Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeasesScheduleOfSupplementalInformationForNoncancellableOperatingLeasesDetails</Role>
      <ShortName>Leases - Schedule of Supplemental Information for Non-cancellable Operating Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>100520 - Disclosure - Leases - Schedule of Supplemental Information for Non-cancellable Operating Leases (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureLeasesScheduleOfSupplementalInformationForNoncancellableOperatingLeasesParentheticalDetails</Role>
      <ShortName>Leases - Schedule of Supplemental Information for Non-cancellable Operating Leases (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>100530 - Disclosure - Non-controlling Interest - Schedule of Ownership of Non-controlling Interest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureNoncontrollingInterestScheduleOfOwnershipOfNoncontrollingInterestDetails</Role>
      <ShortName>Non-controlling Interest - Schedule of Ownership of Non-controlling Interest (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>100540 - Disclosure - Earnings Per Share - Schedule of Computation of Basic and Diluted Net Income Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEarningsPerShareScheduleOfComputationOfBasicAndDilutedNetIncomePerShareDetails</Role>
      <ShortName>Earnings Per Share - Schedule of Computation of Basic and Diluted Net Income Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>100560 - Disclosure - Equity-Based Compensation - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEquitybasedCompensationAdditionalInformationDetails</Role>
      <ShortName>Equity-Based Compensation - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>100570 - Disclosure - Equity-Based Compensation - Summary of Stock Option Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEquitybasedCompensationSummaryOfStockOptionActivityDetails</Role>
      <ShortName>Equity-Based Compensation - Summary of Stock Option Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>100580 - Disclosure - Equity-Based Compensation - Summary of RSU Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEquitybasedCompensationSummaryOfRsuActivityDetails</Role>
      <ShortName>Equity-Based Compensation - Summary of RSU Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>100590 - Disclosure - Equity-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Options Granted (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureEquitybasedCompensationScheduleOfAssumptionsUsedToCalculateFairValueOfOptionsGrantedDetails</Role>
      <ShortName>Equity-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Options Granted (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>100610 - Disclosure - Segment Information - Summary of Revenue Disaggregated by Geography (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureSegmentInformationSummaryOfRevenueDisaggregatedByGeographyDetails</Role>
      <ShortName>Segment Information - Summary of Revenue Disaggregated by Geography (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>100620 - Disclosure - Income Taxes - Schedule of Provision for Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureIncomeTaxesScheduleOfProvisionForIncomeTaxesDetails</Role>
      <ShortName>Income Taxes - Schedule of Provision for Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>100630 - Disclosure - Income Taxes - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails</Role>
      <ShortName>Income Taxes - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="cwan-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>100640 - Disclosure - Transactions with Related Parties - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://clearwater-analytics.com/20220331/taxonomy/role/DisclosureTransactionsWithRelatedPartiesAdditionalInformationDetails</Role>
      <ShortName>Transactions with Related Parties - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</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" original="cwan-20220331.htm">cwan-20220331.htm</File>
    <File>cwan-20220331.xsd</File>
    <File>cwan-20220331_cal.xml</File>
    <File>cwan-20220331_def.xml</File>
    <File>cwan-20220331_lab.xml</File>
    <File>cwan-20220331_pre.xml</File>
    <File>cwan-ex31_1.htm</File>
    <File>cwan-ex31_2.htm</File>
    <File>cwan-ex32_1.htm</File>
    <File>cwan-ex32_2.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>img265067083_0.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="418">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="36">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
