<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>146</ContextCount>
  <ElementCount>300</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>58</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001002 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002003 - Statement - Condensed Consolidated Balance Sheets - (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets - (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1003004 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CondensedConsolidatedStatementsofOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1004005 - Statement - Condensed Consolidated Statements of Operations - (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CondensedConsolidatedStatementsofOperationsParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Operations - (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1005006 - Statement - Condensed Consolidated Statements of Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CondensedConsolidatedStatementsofComprehensiveLoss</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1006007 - Statement - Condensed Consolidated Statements of Stockholders??? Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CondensedConsolidatedStatementsofStockholdersEquityDeficit</Role>
      <ShortName>Condensed Consolidated Statements of Stockholders??? Equity (Deficit)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1007008 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CondensedConsolidatedStatementsofCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2101101 - Disclosure - Summary of Business and Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPolicies</Role>
      <ShortName>Summary of Business and Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2111102 - Disclosure - Cash and Cash Equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CashandCashEquivalents</Role>
      <ShortName>Cash and Cash Equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2114103 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2118104 - Disclosure - Property and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/PropertyandEquipmentNet</Role>
      <ShortName>Property and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2122105 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2128106 - Disclosure - Business Combinations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/BusinessCombinations</Role>
      <ShortName>Business Combinations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2134107 - Disclosure - Goodwill and Other Intangible Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/GoodwillandOtherIntangibleAssetsNet</Role>
      <ShortName>Goodwill and Other Intangible Assets, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2140108 - Disclosure - Accrued Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/AccruedLiabilities</Role>
      <ShortName>Accrued Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2143109 - Disclosure - Commitment and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CommitmentandContingencies</Role>
      <ShortName>Commitment and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2144110 - Disclosure - Stock-based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/StockbasedCompensation</Role>
      <ShortName>Stock-based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2150111 - Disclosure - Net Loss Per Share Attributable to Common Stockholders</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/NetLossPerShareAttributabletoCommonStockholders</Role>
      <ShortName>Net Loss Per Share Attributable to Common Stockholders</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2154112 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2156113 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2202201 - Disclosure - Summary of Business and Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Business and Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPolicies</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2303301 - Disclosure - Summary of Business and Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Business and Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPolicies</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2312302 - Disclosure - Cash and Cash Equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CashandCashEquivalentsTables</Role>
      <ShortName>Cash and Cash Equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/CashandCashEquivalents</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2315303 - Disclosure - Fair Value Measurement (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/FairValueMeasurementTables</Role>
      <ShortName>Fair Value Measurement (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/FairValueMeasurements</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2319304 - Disclosure - Property and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/PropertyandEquipmentNetTables</Role>
      <ShortName>Property and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/PropertyandEquipmentNet</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2323305 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/Leases</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2329306 - Disclosure - Business Combinations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/BusinessCombinationsTables</Role>
      <ShortName>Business Combinations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/BusinessCombinations</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2335307 - Disclosure - Goodwill and Other Intangible Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/GoodwillandOtherIntangibleAssetsNetTables</Role>
      <ShortName>Goodwill and Other Intangible Assets, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/GoodwillandOtherIntangibleAssetsNet</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2341308 - Disclosure - Accrued Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/AccruedLiabilitiesTables</Role>
      <ShortName>Accrued Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/AccruedLiabilities</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2345309 - Disclosure - Stock-based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/StockbasedCompensationTables</Role>
      <ShortName>Stock-based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/StockbasedCompensation</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2351310 - Disclosure - Net Loss Per Share Attributable to Common Stockholders (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/NetLossPerShareAttributabletoCommonStockholdersTables</Role>
      <ShortName>Net Loss Per Share Attributable to Common Stockholders (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/NetLossPerShareAttributabletoCommonStockholders</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2404401 - Disclosure - Summary of Business and Significant Accounting Policies - Professional Services and Other Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesProfessionalServicesandOtherRevenueDetails</Role>
      <ShortName>Summary of Business and Significant Accounting Policies - Professional Services and Other Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Summary of Business and Significant Accounting Policies - Revenue Included in Prior Period Deferred Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesRevenueIncludedinPriorPeriodDeferredRevenueDetails</Role>
      <ShortName>Summary of Business and Significant Accounting Policies - Revenue Included in Prior Period Deferred Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2406403 - Disclosure - Summary of Business and Significant Accounting Policies - Remaining Performance Obligation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesRemainingPerformanceObligationDetails</Role>
      <ShortName>Summary of Business and Significant Accounting Policies - Remaining Performance Obligation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2407404 - Disclosure - Summary of Business and Significant Accounting Policies - Disaggregation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesDisaggregationofRevenueDetails</Role>
      <ShortName>Summary of Business and Significant Accounting Policies - Disaggregation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2408405 - Disclosure - Summary of Business and Significant Accounting Policies - Accounts Receivable and Allowances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesAccountsReceivableandAllowancesDetails</Role>
      <ShortName>Summary of Business and Significant Accounting Policies - Accounts Receivable and Allowances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2409406 - Disclosure - Summary of Business and Significant Accounting Policies - Deferred Contract Acquisition Costs, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesDeferredContractAcquisitionCostsnetDetails</Role>
      <ShortName>Summary of Business and Significant Accounting Policies - Deferred Contract Acquisition Costs, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2410407 - Disclosure - Summary of Business and Significant Accounting Policies - Internal-use Software (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/SummaryofBusinessandSignificantAccountingPoliciesInternaluseSoftwareDetails</Role>
      <ShortName>Summary of Business and Significant Accounting Policies - Internal-use Software (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2413408 - Disclosure - Cash and Cash Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/CashandCashEquivalentsDetails</Role>
      <ShortName>Cash and Cash Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/CashandCashEquivalentsTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2416409 - Disclosure - Fair Value Measurements - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/FairValueMeasurementsNarrativeDetails</Role>
      <ShortName>Fair Value Measurements - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2417410 - Disclosure - Fair Value Measurements - Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/FairValueMeasurementsFairValueDetails</Role>
      <ShortName>Fair Value Measurements - Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2420411 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/PropertyandEquipmentNetScheduleofPropertyandEquipmentNetDetails</Role>
      <ShortName>Property and Equipment, Net - Schedule of Property and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2421412 - Disclosure - Property and Equipment, Net - Schedule of Amortization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/PropertyandEquipmentNetScheduleofAmortizationDetails</Role>
      <ShortName>Property and Equipment, Net - Schedule of Amortization (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2424413 - Disclosure - Leases - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2425414 - Disclosure - Leases - Components of Lease Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/LeasesComponentsofLeaseExpenseDetails</Role>
      <ShortName>Leases - Components of Lease Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2426415 - Disclosure - Leases - Other Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/LeasesOtherInformationDetails</Role>
      <ShortName>Leases - Other Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2427416 - Disclosure - Leases - Operating Lease Maturity Schedule (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/LeasesOperatingLeaseMaturityScheduleDetails</Role>
      <ShortName>Leases - Operating Lease Maturity Schedule (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2430417 - Disclosure - Business Combinations - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/BusinessCombinationsNarrativeDetails</Role>
      <ShortName>Business Combinations - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2431418 - Disclosure - Business Combinations - Acquisition Date Fair Value of the Consideration Transferred (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/BusinessCombinationsAcquisitionDateFairValueoftheConsiderationTransferredDetails</Role>
      <ShortName>Business Combinations - Acquisition Date Fair Value of the Consideration Transferred (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2432419 - Disclosure - Business Combinations - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/BusinessCombinationsScheduleofRecognizedIdentifiedAssetsAcquiredandLiabilitiesAssumedDetails</Role>
      <ShortName>Business Combinations - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2433420 - Disclosure - Business Combinations - Allocation of Purchase Price (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/BusinessCombinationsAllocationofPurchasePriceDetails</Role>
      <ShortName>Business Combinations - Allocation of Purchase Price (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2436421 - Disclosure - Goodwill and Other Intangible Assets, Net - Changes in Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/GoodwillandOtherIntangibleAssetsNetChangesinGoodwillDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets, Net - Changes in Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2437422 - Disclosure - Goodwill and Other Intangible Assets, Net - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/GoodwillandOtherIntangibleAssetsNetIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets, Net - Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2438423 - Disclosure - Goodwill and Other Intangible Assets, Net - Amortization Expense of Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/GoodwillandOtherIntangibleAssetsNetAmortizationExpenseofIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets, Net - Amortization Expense of Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2439424 - Disclosure - Other Intangible Assets, Net - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/OtherIntangibleAssetsNetNarrativeDetails</Role>
      <ShortName>Other Intangible Assets, Net - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2442425 - Disclosure - Accrued Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/AccruedLiabilitiesDetails</Role>
      <ShortName>Accrued Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/AccruedLiabilitiesTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2446426 - Disclosure - Stock-based Compensation - Cash Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/StockbasedCompensationCashAwardsDetails</Role>
      <ShortName>Stock-based Compensation - Cash Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2447427 - Disclosure - Stock-based Compensation - Equity Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/StockbasedCompensationEquityAwardsDetails</Role>
      <ShortName>Stock-based Compensation - Equity Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2448428 - Disclosure - Stock-based Compensation - Restricted Stock Units and Related Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/StockbasedCompensationRestrictedStockUnitsandRelatedActivityDetails</Role>
      <ShortName>Stock-based Compensation - Restricted Stock Units and Related Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2449429 - Disclosure - Stock-based Compensation - Outstanding common stock options and related activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/StockbasedCompensationOutstandingcommonstockoptionsandrelatedactivityDetails</Role>
      <ShortName>Stock-based Compensation - Outstanding common stock options and related activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2452430 - Disclosure - Net Loss Per Share Attributable to Common Stockholders - Calculation of Basic Net Earnings (Loss) per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/NetLossPerShareAttributabletoCommonStockholdersCalculationofBasicNetEarningsLossperShareDetails</Role>
      <ShortName>Net Loss Per Share Attributable to Common Stockholders - Calculation of Basic Net Earnings (Loss) per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2453431 - Disclosure - Net Loss Per Share Attributable to Common Stockholders - Weighted-average Impact of Potentially Dilutive Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/NetLossPerShareAttributabletoCommonStockholdersWeightedaverageImpactofPotentiallyDilutiveSecuritiesDetails</Role>
      <ShortName>Net Loss Per Share Attributable to Common Stockholders - Weighted-average Impact of Potentially Dilutive Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2455432 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/IncomeTaxes</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="xm-20220331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2457433 - Disclosure - Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.qualtrics.com/role/RelatedPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.qualtrics.com/role/RelatedPartyTransactions</ParentRole>
      <Position>65</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="xm-20220331.htm">xm-20220331.htm</File>
    <File>exhibit311q12022.htm</File>
    <File>exhibit312q12022.htm</File>
    <File>exhibit321q12022.htm</File>
    <File>xm-20220331.xsd</File>
    <File>xm-20220331_cal.xml</File>
    <File>xm-20220331_def.xml</File>
    <File>xm-20220331_lab.xml</File>
    <File>xm-20220331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="567">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
