<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.23.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>386</ContextCount>
  <ElementCount>561</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>133</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>1001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1002 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1003 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1004 - Statement - Consolidated Statements Of Operations And Comprehensive (Loss) Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveLossIncome</Role>
      <ShortName>Consolidated Statements Of Operations And Comprehensive (Loss) Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1005 - Statement - Consolidated Statements Of Operations And Comprehensive (Loss) Income (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveLossIncomeParenthetical</Role>
      <ShortName>Consolidated Statements Of Operations And Comprehensive (Loss) Income (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1006 - Statement - Consolidated Statements of Changes in Shareholders' (Deficit) Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedStatementsOfChangesInShareholdersDeficitEquity</Role>
      <ShortName>Consolidated Statements of Changes in Shareholders' (Deficit) Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1007 - Statement - Consolidated Statements of Changes in Shareholders' (Deficit) Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedStatementsOfChangesInShareholdersDeficitEquityParenthetical</Role>
      <ShortName>Consolidated Statements of Changes in Shareholders' (Deficit) Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1008 - Statement - Consolidated Statements Of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements Of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1009 - Statement - Consolidated Statements Of Cash Flows (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ConsolidatedStatementsOfCashFlowsParenthetical</Role>
      <ShortName>Consolidated Statements Of Cash Flows (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>1010 - Disclosure - Organization and Nature of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OrganizationAndNatureOfOperations</Role>
      <ShortName>Organization and Nature of Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>1011 - Disclosure - Principal Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPolicies</Role>
      <ShortName>Principal Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>1012 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>1013 - Disclosure - Business Combination</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/BusinessCombination</Role>
      <ShortName>Business Combination</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>1014 - Disclosure - Short-Term Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShortTermInvestments</Role>
      <ShortName>Short-Term Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>1015 - Disclosure - Accounts Receivable, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AccountsReceivableNet</Role>
      <ShortName>Accounts Receivable, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>1016 - Disclosure - Loans Receivable, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LoansReceivableNet</Role>
      <ShortName>Loans Receivable, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>1017 - Disclosure - Prepayments And Other Current Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrepaymentsAndOtherCurrentAssets</Role>
      <ShortName>Prepayments And Other Current Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>1018 - Disclosure - Property And Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PropertyAndEquipmentNet</Role>
      <ShortName>Property And Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>1019 - Disclosure - Investments in Equity Investees</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/InvestmentsInEquityInvestees</Role>
      <ShortName>Investments in Equity Investees</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>1020 - Disclosure - Intangible Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IntangibleAssetsNet</Role>
      <ShortName>Intangible Assets, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>1021 - Disclosure - Other Non-Current Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OtherNonCurrentAssets</Role>
      <ShortName>Other Non-Current Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>1022 - Disclosure - Short-Term Loans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShortTermLoans</Role>
      <ShortName>Short-Term Loans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>1023 - Disclosure - Accrued Expenses and Other Current Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AccruedExpensesAndOtherCurrentLiabilities</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>1024 - Disclosure - Mezzanine Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/MezzanineEquity</Role>
      <ShortName>Mezzanine Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>1025 - Disclosure - Ordinary Shares</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OrdinaryShares</Role>
      <ShortName>Ordinary Shares</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>1026 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>1027 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>1028 - Disclosure - Share-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensation</Role>
      <ShortName>Share-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>1029 - Disclosure - (Loss) Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LossEarningsPerShare</Role>
      <ShortName>(Loss) Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>1030 - Disclosure - Operating Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OperatingLeases</Role>
      <ShortName>Operating Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>1031 - Disclosure - Employee Benefit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/EmployeeBenefit</Role>
      <ShortName>Employee Benefit</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>1032 - Disclosure - Risks And Concentrations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RisksAndConcentrations</Role>
      <ShortName>Risks And Concentrations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>1033 - Disclosure - Restricted Net Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RestrictedNetAssets</Role>
      <ShortName>Restricted Net Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>1034 - Disclosure - Commitments And Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments And Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>1035 - Disclosure - Subsequent Event</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/SubsequentEvent</Role>
      <ShortName>Subsequent Event</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>1036 - Disclosure - Additional Financial Information of Parent Company</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AdditionalFinancialInformationOfParentCompany</Role>
      <ShortName>Additional Financial Information of Parent Company</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>1037 - Disclosure - Principal Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesPolicies</Role>
      <ShortName>Principal Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPolicies</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>1038 - Disclosure - Organization and Nature of Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OrganizationAndNatureOfOperationsTables</Role>
      <ShortName>Organization and Nature of Operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/OrganizationAndNatureOfOperations</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>1039 - Disclosure - Principal Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesTables</Role>
      <ShortName>Principal Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPolicies</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>1040 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/FairValueMeasurements</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>1041 - Disclosure - Business Combination (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/BusinessCombinationTables</Role>
      <ShortName>Business Combination (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/BusinessCombination</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>1042 - Disclosure - Short-Term Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShortTermInvestmentsTables</Role>
      <ShortName>Short-Term Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/ShortTermInvestments</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>1043 - Disclosure - Accounts Receivable, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AccountsReceivableNetTables</Role>
      <ShortName>Accounts Receivable, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/AccountsReceivableNet</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>1044 - Disclosure - Loans Receivable, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LoansReceivableNetTables</Role>
      <ShortName>Loans Receivable, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/LoansReceivableNet</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>1045 - Disclosure - Prepayments And Other Current Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrepaymentsAndOtherCurrentAssetsTables</Role>
      <ShortName>Prepayments And Other Current Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/PrepaymentsAndOtherCurrentAssets</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>1046 - Disclosure - Property And Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PropertyAndEquipmentNetTables</Role>
      <ShortName>Property And Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/PropertyAndEquipmentNet</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>1047 - Disclosure - Investments in Equity Investees (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/InvestmentsInEquityInvesteesTables</Role>
      <ShortName>Investments in Equity Investees (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/InvestmentsInEquityInvestees</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>1048 - Disclosure - Intangible Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IntangibleAssetsNetTables</Role>
      <ShortName>Intangible Assets, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/IntangibleAssetsNet</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>1049 - Disclosure - Other Non-Current Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OtherNonCurrentAssetsTables</Role>
      <ShortName>Other Non-Current Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/OtherNonCurrentAssets</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>1050 - Disclosure - Short-Term Loans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShortTermLoansTables</Role>
      <ShortName>Short-Term Loans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/ShortTermLoans</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>1051 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/AccruedExpensesAndOtherCurrentLiabilities</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>1052 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/IncomeTaxes</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>1053 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/RelatedPartyTransactions</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>1054 - Disclosure - Share-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensationTables</Role>
      <ShortName>Share-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensation</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>1055 - Disclosure - (Loss) Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LossEarningsPerShareTables</Role>
      <ShortName>(Loss) Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/LossEarningsPerShare</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>1056 - Disclosure - Operating Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OperatingLeasesTables</Role>
      <ShortName>Operating Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fulltruckalliancecoltd.com/role/OperatingLeases</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>1057 - Disclosure - Organization and Nature of Operations - Summary of Major Subsidiaries and Consolidated VIEs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OrganizationAndNatureOfOperationsSummaryOfMajorSubsidiariesAndConsolidatedViesDetail</Role>
      <ShortName>Organization and Nature of Operations - Summary of Major Subsidiaries and Consolidated VIEs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>1058 - Schedule - Organization and Nature of Operations - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OrganizationAndNatureOfOperationsAdditionalInformationDetail</Role>
      <ShortName>Organization and Nature of Operations - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>1059 - Disclosure - Principal Accounting Policies - Summary of Balance Sheet Amounts and Balances of the Consolidated VIEs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfBalanceSheetAmountsAndBalancesOfTheConsolidatedViesDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Balance Sheet Amounts and Balances of the Consolidated VIEs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>1060 - Disclosure - Principal Accounting Policies - Summary of Income and Cash Flow Statement Amounts and Balances of the Consolidated VIEs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfIncomeAndCashFlowStatementAmountsAndBalancesOfTheConsolidatedViesDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Income and Cash Flow Statement Amounts and Balances of the Consolidated VIEs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>1061 - Disclosure - Principal Accounting Policies - Summary of Balance Sheet Amounts and Balances of the Consolidated Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfBalanceSheetAmountsAndBalancesOfTheConsolidatedTrustsDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Balance Sheet Amounts and Balances of the Consolidated Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>1062 - Disclosure - Principal Accounting Policies - Summary of Income and Cash Flow Amounts and Balances of the Consolidated Trusts (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfIncomeAndCashFlowAmountsAndBalancesOfTheConsolidatedTrustsDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Income and Cash Flow Amounts and Balances of the Consolidated Trusts (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>1063 - Disclosure - Principal Accounting Policies - Summary of Property and Equipment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfPropertyAndEquipmentDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Property and Equipment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>1064 - Disclosure - Principal Accounting Policies - Summary of Useful Lives of Intangible Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfUsefulLivesOfIntangibleAssetsDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Useful Lives of Intangible Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>1065 - Disclosure - Principal Accounting Policies - Summary of the Disaggregated Revenues (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfTheDisaggregatedRevenuesDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of the Disaggregated Revenues (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>1066 - Disclosure - Principal Accounting Policies - Summary of the Disaggregated Revenues (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfTheDisaggregatedRevenuesParentheticalDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of the Disaggregated Revenues (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>1067 - Disclosure - Principal Accounting Policies - Summary of Contract Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfContractLiabilitiesDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Contract Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>1068 - Disclosure - Principal Accounting Policies - Summary of Value Added Tax (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesSummaryOfValueAddedTaxDetail</Role>
      <ShortName>Principal Accounting Policies - Summary of Value Added Tax (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>1069 - Disclosure - Principal Accounting Policies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrincipalAccountingPoliciesAdditionalInformationDetail</Role>
      <ShortName>Principal Accounting Policies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>1070 - Disclosure - Fair Value Measurements - Schedule Of Fair Value Of Assets And Liabilities On Recurring Basis (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/FairValueMeasurementsScheduleOfFairValueOfAssetsAndLiabilitiesOnRecurringBasisDetail</Role>
      <ShortName>Fair Value Measurements - Schedule Of Fair Value Of Assets And Liabilities On Recurring Basis (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>1071 - Disclosure - Fair Value Measurements - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/FairValueMeasurementsAdditionalInformationDetail</Role>
      <ShortName>Fair Value Measurements - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>1072 - Disclosure - Business Combination - Summary of Information Technology (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/BusinessCombinationSummaryOfInformationTechnologyDetail</Role>
      <ShortName>Business Combination - Summary of Information Technology (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>1073 - Disclosure - Business Combination - Summary of Information Technology (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/BusinessCombinationSummaryOfInformationTechnologyParentheticalDetail</Role>
      <ShortName>Business Combination - Summary of Information Technology (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>1074 - Disclosure - Business Combination - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/BusinessCombinationAdditionalInformationDetail</Role>
      <ShortName>Business Combination - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>1075 - Disclosure - Short-Term Investments - Summary Of Short-Term Investments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShortTermInvestmentsSummaryOfShortTermInvestmentsDetail</Role>
      <ShortName>Short-Term Investments - Summary Of Short-Term Investments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>1076 - Disclosure - Accounts Receivable, Net - Summary Of Accounts Receivable And The Related Bad Debt Provision (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AccountsReceivableNetSummaryOfAccountsReceivableAndTheRelatedBadDebtProvisionDetail</Role>
      <ShortName>Accounts Receivable, Net - Summary Of Accounts Receivable And The Related Bad Debt Provision (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>1077 - Disclosure - Accounts Receivable, Net - Summary Of Movement Of Bad Debt Provision For Accounts Receivable (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AccountsReceivableNetSummaryOfMovementOfBadDebtProvisionForAccountsReceivableDetail</Role>
      <ShortName>Accounts Receivable, Net - Summary Of Movement Of Bad Debt Provision For Accounts Receivable (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>1078 - Disclosure - Loans Receivable, Net - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LoansReceivableNetAdditionalInformationDetail</Role>
      <ShortName>Loans Receivable, Net - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>1079 - Disclosure - Loans Receivable, Net - Summary Of Accounts, Notes, Loans and Financing Receivable (Detail)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LoansReceivableNetSummaryOfAccountsNotesLoansAndFinancingReceivableDetail</Role>
      <ShortName>Loans Receivable, Net - Summary Of Accounts, Notes, Loans and Financing Receivable (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>1080 - Disclosure - Loans Receivable, Net - Summary of Financing Receivable Past Due (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LoansReceivableNetSummaryOfFinancingReceivablePastDueDetail</Role>
      <ShortName>Loans Receivable, Net - Summary of Financing Receivable Past Due (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>1081 - Disclosure - Loans Receivable, Net - Summary of Financing Receivable Allowance for Credit Loss (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LoansReceivableNetSummaryOfFinancingReceivableAllowanceForCreditLossDetail</Role>
      <ShortName>Loans Receivable, Net - Summary of Financing Receivable Allowance for Credit Loss (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>1082 - Disclosure - Prepayments And Other Current Assets - Summary Of Prepayments And Other Current Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PrepaymentsAndOtherCurrentAssetsSummaryOfPrepaymentsAndOtherCurrentAssetsDetail</Role>
      <ShortName>Prepayments And Other Current Assets - Summary Of Prepayments And Other Current Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>1083 - Disclosure - Property And Equipment, Net - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PropertyAndEquipmentNetAdditionalInformationDetail</Role>
      <ShortName>Property And Equipment, Net - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>1084 - Disclosure - Property And Equipment, Net - Summary of Property And Equipment, Net (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/PropertyAndEquipmentNetSummaryOfPropertyAndEquipmentNetDetail</Role>
      <ShortName>Property And Equipment, Net - Summary of Property And Equipment, Net (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>1085 - Disclosure - Investments in Equity Investees - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/InvestmentsInEquityInvesteesAdditionalInformationDetail</Role>
      <ShortName>Investments in Equity Investees - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>1086 - Disclosure - Investments in Equity Investees - Summary of the Group's balances of investment in equity investees (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/InvestmentsInEquityInvesteesSummaryOfTheGroupSBalancesOfInvestmentInEquityInvesteesDetail</Role>
      <ShortName>Investments in Equity Investees - Summary of the Group's balances of investment in equity investees (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>1087 - Disclosure - Intangible Assets, Net - Summary of Net Book Value of the Intangible Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IntangibleAssetsNetSummaryOfNetBookValueOfTheIntangibleAssetsDetail</Role>
      <ShortName>Intangible Assets, Net - Summary of Net Book Value of the Intangible Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>1088 - Disclosure - Intangible Assets, Net - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IntangibleAssetsNetAdditionalInformationDetail</Role>
      <ShortName>Intangible Assets, Net - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>1089 - Disclosure - Intangible Assets, Net - Summary of Estimated Aggregate Amortization Expenses (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IntangibleAssetsNetSummaryOfEstimatedAggregateAmortizationExpensesDetail</Role>
      <ShortName>Intangible Assets, Net - Summary of Estimated Aggregate Amortization Expenses (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>1090 - Disclosure - Other Non-Current Assets - Summary of Other Non-Current Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetail</Role>
      <ShortName>Other Non-Current Assets - Summary of Other Non-Current Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>1091 - Disclosure - Short-Term Loans - Summary of Short-Term Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShortTermLoansSummaryOfShortTermDebtDetail</Role>
      <ShortName>Short-Term Loans - Summary of Short-Term Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>1092 - Disclosure - Short-Term Loans - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShortTermLoansAdditionalInformationDetail</Role>
      <ShortName>Short-Term Loans - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>1093 - Disclosure - Accrued Expenses and Other Current Liabilities -  Summary of Accrued Liabilities and Other Liabilities Disclosure Current (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentDetail</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities -  Summary of Accrued Liabilities and Other Liabilities Disclosure Current (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>1094 - Disclosure - Mezzanine Equity - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/MezzanineEquityAdditionalInformationDetail</Role>
      <ShortName>Mezzanine Equity - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>1095 - Disclosure - Ordinary Shares - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OrdinarySharesAdditionalInformationDetail</Role>
      <ShortName>Ordinary Shares - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>1096 - Disclosure - Income Taxes - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxesAdditionalInformationDetail</Role>
      <ShortName>Income Taxes - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>1097 - Disclosure - Income Taxes - Schedule Loss (income) by tax jurisdictions (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxesScheduleLossIncomeByTaxJurisdictionsDetail</Role>
      <ShortName>Income Taxes - Schedule Loss (income) by tax jurisdictions (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>1098 - Disclosure - Income Taxes - Schedule the current and deferred portion of income tax expenses included in the consolidated statements of operations and comprehensive (loss) income (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxesScheduleTheCurrentAndDeferredPortionOfIncomeTaxExpensesIncludedInTheConsolidatedStatementsOfOperationsAndComprehensiveLossIncomeDetail</Role>
      <ShortName>Income Taxes - Schedule the current and deferred portion of income tax expenses included in the consolidated statements of operations and comprehensive (loss) income (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>1099 - Disclosure - Income Taxes - Schedule Reconciliation of the differences between PRC statutory income tax rate and the Group's effective income tax rate (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxesScheduleReconciliationOfTheDifferencesBetweenPrcStatutoryIncomeTaxRateAndTheGroupSEffectiveIncomeTaxRateDetail</Role>
      <ShortName>Income Taxes - Schedule Reconciliation of the differences between PRC statutory income tax rate and the Group's effective income tax rate (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>1100 - Disclosure - Income Taxes - Schedule Deferred tax assets and deferred tax liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxesScheduleDeferredTaxAssetsAndDeferredTaxLiabilitiesDetail</Role>
      <ShortName>Income Taxes - Schedule Deferred tax assets and deferred tax liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>1101 - Disclosure - Income Taxes - Schedule Movement of valuation allowance (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/IncomeTaxesScheduleMovementOfValuationAllowanceDetail</Role>
      <ShortName>Income Taxes - Schedule Movement of valuation allowance (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>1102 - Disclosure - Related Party Transactions - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RelatedPartyTransactionsAdditionalInformationDetail</Role>
      <ShortName>Related Party Transactions - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>1103 - Disclosure - Related Party Transactions - Summary of Related Party Transactions (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RelatedPartyTransactionsSummaryOfRelatedPartyTransactionsDetail</Role>
      <ShortName>Related Party Transactions - Summary of Related Party Transactions (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>1104 - Disclosure - Share-Based Compensation  - Summary of Share Options Activity Classified as Equity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensationSummaryOfShareOptionsActivityClassifiedAsEquityDetail</Role>
      <ShortName>Share-Based Compensation  - Summary of Share Options Activity Classified as Equity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>1105 - Disclosure - Share-Based Compensation - Summary of Fair Value of Stock Options Valuation Assumptions (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensationSummaryOfFairValueOfStockOptionsValuationAssumptionsDetail</Role>
      <ShortName>Share-Based Compensation - Summary of Fair Value of Stock Options Valuation Assumptions (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>1106 - Disclosure - Share-Based Compensation - Summary of Restricted Share Activity (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensationSummaryOfRestrictedShareActivityDetail</Role>
      <ShortName>Share-Based Compensation - Summary of Restricted Share Activity (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>1107 - Disclosure - Share-Based Compensation - Summary of Share Based Compensation Expense (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensationSummaryOfShareBasedCompensationExpenseDetail</Role>
      <ShortName>Share-Based Compensation - Summary of Share Based Compensation Expense (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>1108 - Disclosure - Share-Based Compensation - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/ShareBasedCompensationAdditionalInformationDetail</Role>
      <ShortName>Share-Based Compensation - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>1109 - Disclosure - (Loss) Earnings Per Share - Summary of Loss Per Share (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LossEarningsPerShareSummaryOfLossPerShareDetail</Role>
      <ShortName>(Loss) Earnings Per Share - Summary of Loss Per Share (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>1110 - Disclosure - (Loss) Earnings Per Share - Summary of  Antidilutive Securities Excluded from Computation of Earnings Per share (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/LossEarningsPerShareSummaryOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetail</Role>
      <ShortName>(Loss) Earnings Per Share - Summary of  Antidilutive Securities Excluded from Computation of Earnings Per share (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>1111 - Disclosure - Operating Leases - Summary of supplemental information related to leases and location (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OperatingLeasesSummaryOfSupplementalInformationRelatedToLeasesAndLocationDetail</Role>
      <ShortName>Operating Leases - Summary of supplemental information related to leases and location (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>1112 - Disclosure - Operating Leases - Summary of supplemental cash flow information related to leases (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OperatingLeasesSummaryOfSupplementalCashFlowInformationRelatedToLeasesDetail</Role>
      <ShortName>Operating Leases - Summary of supplemental cash flow information related to leases (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>1113 - Disclosure - Operating Leases - Summary of maturities of lease liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OperatingLeasesSummaryOfMaturitiesOfLeaseLiabilitiesDetail</Role>
      <ShortName>Operating Leases - Summary of maturities of lease liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>1114 - Disclosure - Operating Leases - Summary of maturities of lease liabilities (Detail) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OperatingLeasesSummaryOfMaturitiesOfLeaseLiabilitiesDetailParenthetical</Role>
      <ShortName>Operating Leases - Summary of maturities of lease liabilities (Detail) (Parenthetical)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>1115 - Disclosure - Operating Leases - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/OperatingLeasesAdditionalInformationDetail</Role>
      <ShortName>Operating Leases - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>1116 - Disclosure - Employee Benefit - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/EmployeeBenefitAdditionalInformationDetail</Role>
      <ShortName>Employee Benefit - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>1117 - Disclosure - Risks And Concentrations - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RisksAndConcentrationsAdditionalInformationDetail</Role>
      <ShortName>Risks And Concentrations - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>1118 - Disclosure - Restricted Net Assets - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/RestrictedNetAssetsAdditionalInformationDetail</Role>
      <ShortName>Restricted Net Assets - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>1119 - Disclosure - Commitments  And Contingencies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/CommitmentsAndContingenciesAdditionalInformationDetail</Role>
      <ShortName>Commitments  And Contingencies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>1120 - Disclosure - Subsequent Event - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/SubsequentEventAdditionalInformationDetail</Role>
      <ShortName>Subsequent Event - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>1121 - Disclosure - Additional Financial Information of Parent Company - Condensed Balance Sheets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AdditionalFinancialInformationOfParentCompanyCondensedBalanceSheetsDetail</Role>
      <ShortName>Additional Financial Information of Parent Company - Condensed Balance Sheets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>1122 - Disclosure - Additional Financial Information of Parent Company - Condensed Balance Sheets (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AdditionalFinancialInformationOfParentCompanyCondensedBalanceSheetsParentheticalDetail</Role>
      <ShortName>Additional Financial Information of Parent Company - Condensed Balance Sheets (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>122</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>1123 - Disclosure - Additional Financial Information of Parent Company - Condensed Statements of Operations and Comprehensive Loss (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AdditionalFinancialInformationOfParentCompanyCondensedStatementsOfOperationsAndComprehensiveLossDetail</Role>
      <ShortName>Additional Financial Information of Parent Company - Condensed Statements of Operations and Comprehensive Loss (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>123</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>1124 - Disclosure - Additional Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AdditionalFinancialInformationOfParentCompanyCondensedStatementsOfCashFlowsDetail</Role>
      <ShortName>Additional Financial Information of Parent Company - Condensed Statements of Cash Flows (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>124</Position>
    </Report>
    <Report instance="d425402d20f.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>1125 - Disclosure - Additional Financial Information of Parent Company - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fulltruckalliancecoltd.com/role/AdditionalFinancialInformationOfParentCompanyAdditionalInformationDetail</Role>
      <ShortName>Additional Financial Information of Parent Company - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>125</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">[dq-0542-Deprecated-Concept] Concept DueFromRelatedPartiesCurrent in us-gaap/2022 used in 7 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. d425402d20f.htm 17828, 17832, 17836, 24939, 24943, 29297, 29317</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept DueToRelatedPartiesCurrent in us-gaap/2022 used in 22 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. d425402d20f.htm 18276, 18280, 18284, 29332, 29379, 29383, 29389, 29393, 29399, 29409, 29419, 29423, 29429, 29439, 29443, 29449, 29469, 29473, 31055, 31059, 31063</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept PropertyPlantAndEquipmentEstimatedUsefulLives in us-gaap/2022 used in 1 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. d425402d20f.htm 25639</Log>
    <Log type="Warning">[dq-0542-Deprecated-Concept] Concept RevenueFromRelatedParties in us-gaap/2022 used in 8 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. d425402d20f.htm 29036, 29083, 29091, 29097, 29125, 29133</Log>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 14 fact(s) appearing in ix:hidden were eligible for transformation: dei:EntityIncorporationStateCountryCode, us-gaap:RelatedPartyTransactionDescriptionOfTransaction -  d425402d20f.htm 17548</Log>
  </Logs>
  <InputFiles>
    <File doctype="20-F" original="d425402d20f.htm">d425402d20f.htm</File>
    <File>d425402dex121.htm</File>
    <File>d425402dex122.htm</File>
    <File>d425402dex131.htm</File>
    <File>d425402dex132.htm</File>
    <File>d425402dex151.htm</File>
    <File>d425402dex152.htm</File>
    <File>d425402dex153.htm</File>
    <File>d425402dex414.htm</File>
    <File>d425402dex415.htm</File>
    <File>d425402dex416.htm</File>
    <File>d425402dex417.htm</File>
    <File>d425402dex418.htm</File>
    <File>d425402dex428.htm</File>
    <File>d425402dex81.htm</File>
    <File>ymm-20221231.xsd</File>
    <File>ymm-20221231_cal.xml</File>
    <File>ymm-20221231_def.xml</File>
    <File>ymm-20221231_lab.xml</File>
    <File>ymm-20221231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>g425402g0413110623315.jpg</File>
    <File>g425402g0413110624295.jpg</File>
    <File>g425402g0413110625295.jpg</File>
    <File>g425402g0413110626316.jpg</File>
    <File>g425402g0413110627293.jpg</File>
    <File>g425402g0413110628260.jpg</File>
    <File>g425402g0413110629293.jpg</File>
    <File>g425402g0413110630320.jpg</File>
    <File>g425402g0413110631408.jpg</File>
    <File>g425402g0413110632335.jpg</File>
    <File>g425402g0413110633264.jpg</File>
    <File>g425402g0413112631971.jpg</File>
    <File>g425402g0413112634018.jpg</File>
    <File>g425402g16z33.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="3">http://fasb.org/srt/2022</BaseTaxonomy>
    <BaseTaxonomy items="1617">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="96">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
