<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>789</ContextCount>
  <ElementCount>610</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>189</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>1001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1002 - Statement - Consolidated Statements of Financial Condition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ConsolidatedStatementsOfFinancialCondition</Role>
      <ShortName>Consolidated Statements of Financial Condition</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1003 - Statement - Consolidated Statements of Financial Condition (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ConsolidatedStatementsOfFinancialConditionParenthetical</Role>
      <ShortName>Consolidated Statements of Financial Condition (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1004 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ConsolidatedStatementsOfOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1005 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1006 - Statement - Consolidated Statement of Changes in Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ConsolidatedStatementOfChangesInEquity</Role>
      <ShortName>Consolidated Statement of Changes in Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1007 - Statement - Consolidated Statement of Changes in Equity  (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ConsolidatedStatementOfChangesInEquityParenthetical</Role>
      <ShortName>Consolidated Statement of Changes in Equity  (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="d48618d10k.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.blackstone.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="d48618d10k.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.blackstone.com/role/ConsolidatedStatementsOfCashFlowsParenthetical</Role>
      <ShortName>Consolidated Statements of Cash Flows (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>999002 - Disclosure - Organization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/Organization</Role>
      <ShortName>Organization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>999003 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>999004 - Disclosure - Goodwill and Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/GoodwillAndIntangibleAssets</Role>
      <ShortName>Goodwill and Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>999005 - Disclosure - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/Investments</Role>
      <ShortName>Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>999006 - Disclosure - Derivative Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/DerivativeFinancialInstruments</Role>
      <ShortName>Derivative Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>999007 - Disclosure - Fair Value Option</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FairValueOption</Role>
      <ShortName>Fair Value Option</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>999008 - Disclosure - Fair Value Measurements of Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FairValueMeasurementsOfFinancialInstruments</Role>
      <ShortName>Fair Value Measurements of Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>999009 - Disclosure - Variable Interest Entities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/VariableInterestEntities</Role>
      <ShortName>Variable Interest Entities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>999010 - Disclosure - Repurchase Agreements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RepurchaseAgreements</Role>
      <ShortName>Repurchase Agreements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>999011 - Disclosure - Other Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OtherAssets</Role>
      <ShortName>Other Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>999012 - Disclosure - Offsetting of Assets And Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OffsettingOfAssetsAndLiabilities</Role>
      <ShortName>Offsetting of Assets And Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>999013 - Disclosure - Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/Borrowings</Role>
      <ShortName>Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>999014 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>999015 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>999016 - Disclosure - Earnings Per Share and Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EarningsPerShareAndStockholdersEquity</Role>
      <ShortName>Earnings Per Share and Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>999017 - Disclosure - Equity-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EquityBasedCompensation</Role>
      <ShortName>Equity-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>999018 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>999019 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>999020 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>999021 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>999022 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>999023 - Disclosure - Goodwill and Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/GoodwillAndIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/GoodwillAndIntangibleAssets</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>999024 - Disclosure - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/InvestmentsTables</Role>
      <ShortName>Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/Investments</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>999025 - Disclosure - Derivative Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/DerivativeFinancialInstrumentsTables</Role>
      <ShortName>Derivative Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/DerivativeFinancialInstruments</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>999026 - Disclosure - Fair Value Option (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FairValueOptionTables</Role>
      <ShortName>Fair Value Option (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/FairValueOption</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>999027 - Disclosure - Fair Value Measurements of Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FairValueMeasurementsOfFinancialInstrumentsTables</Role>
      <ShortName>Fair Value Measurements of Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/FairValueMeasurementsOfFinancialInstruments</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>999028 - Disclosure - Variable Interest Entities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/VariableInterestEntitiesTables</Role>
      <ShortName>Variable Interest Entities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/VariableInterestEntities</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>999029 - Disclosure - Repurchase Agreements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RepurchaseAgreementsTables</Role>
      <ShortName>Repurchase Agreements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/RepurchaseAgreements</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>999030 - Disclosure - Other Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OtherAssetsTables</Role>
      <ShortName>Other Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/OtherAssets</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>999031 - Disclosure - Offsetting of Assets And Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OffsettingOfAssetsAndLiabilitiesTables</Role>
      <ShortName>Offsetting of Assets And Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/OffsettingOfAssetsAndLiabilities</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>999032 - Disclosure - Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/BorrowingsTables</Role>
      <ShortName>Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/Borrowings</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>999033 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/Leases</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>999034 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/IncomeTaxes</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>999035 - Disclosure - Earnings Per Share and Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EarningsPerShareAndStockholdersEquityTables</Role>
      <ShortName>Earnings Per Share and Stockholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/EarningsPerShareAndStockholdersEquity</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>999036 - Disclosure - Equity-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EquityBasedCompensationTables</Role>
      <ShortName>Equity-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/EquityBasedCompensation</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>999037 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/RelatedPartyTransactions</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>999038 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>999039 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/SegmentReporting</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>999040 - Disclosure - Organization - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OrganizationAdditionalInformationDetail</Role>
      <ShortName>Organization - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>999041 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail</Role>
      <ShortName>Summary of Significant Accounting Policies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>999042 - Disclosure - Goodwill and Intangible Assets, Net (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/GoodwillAndIntangibleAssetsNetDetail</Role>
      <ShortName>Goodwill and Intangible Assets, Net (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>999043 - Disclosure - Goodwill and Intangible Assets - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/GoodwillAndIntangibleAssetsAdditionalInformationDetail</Role>
      <ShortName>Goodwill and Intangible Assets - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>999044 - Disclosure - Changes in Partnership's Intangible Assets, Net (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ChangesInPartnershipsIntangibleAssetsNetDetail</Role>
      <ShortName>Changes in Partnership's Intangible Assets, Net (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>999045 - Disclosure - Investments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/InvestmentsDetail</Role>
      <ShortName>Investments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.blackstone.com/role/InvestmentsTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>999046 - Disclosure - Investments - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/InvestmentsAdditionalInformationDetail</Role>
      <ShortName>Investments - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>999047 - Disclosure - Reconciliation of Realized and Net Change in Unrealized Gains (Losses) to Other Income (Loss) - Net Gains (Losses) from Fund Investment Activities in Consolidated Statements of Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ReconciliationOfRealizedAndNetChangeInUnrealizedGainsLossesToOtherIncomeLossNetGainsLossesFromFundInvestmentActivitiesInConsolidatedStatementsOfOperationsDetail</Role>
      <ShortName>Reconciliation of Realized and Net Change in Unrealized Gains (Losses) to Other Income (Loss) - Net Gains (Losses) from Fund Investment Activities in Consolidated Statements of Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>999048 - Disclosure - Summarized Financial Information of Partnership's Equity Method Investments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummarizedFinancialInformationOfPartnershipsEquityMethodInvestmentsDetail</Role>
      <ShortName>Summarized Financial Information of Partnership's Equity Method Investments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>999049 - Disclosure - Performance Fees Allocated to Funds (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/PerformanceFeesAllocatedToFundsDetail</Role>
      <ShortName>Performance Fees Allocated to Funds (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>999050 - Disclosure - Realized and Net Change in Unrealized Gains (Losses) on Investments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RealizedAndNetChangeInUnrealizedGainsLossesOnInvestmentsDetail</Role>
      <ShortName>Realized and Net Change in Unrealized Gains (Losses) on Investments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>999051 - Disclosure - Realized and Net Change in Unrealized Gains (Losses) in Other Investments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RealizedAndNetChangeInUnrealizedGainsLossesInOtherInvestmentsDetail</Role>
      <ShortName>Realized and Net Change in Unrealized Gains (Losses) in Other Investments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>999052 - Disclosure - Summary of Aggregate Notional Amount and Fair Value of Derivative Financial Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfAggregateNotionalAmountAndFairValueOfDerivativeFinancialInstrumentsDetail</Role>
      <ShortName>Summary of Aggregate Notional Amount and Fair Value of Derivative Financial Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>999053 - Disclosure - Summary of Impact of Derivative Financial Instruments to Consolidated Statements of Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfImpactOfDerivativeFinancialInstrumentsToConsolidatedStatementsOfOperationsDetail</Role>
      <ShortName>Summary of Impact of Derivative Financial Instruments to Consolidated Statements of Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>999054 - Disclosure - Summary of Financial Instruments for Which Fair Value Option Has Been Elected (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfFinancialInstrumentsForWhichFairValueOptionHasBeenElectedDetail</Role>
      <ShortName>Summary of Financial Instruments for Which Fair Value Option Has Been Elected (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>999055 - Disclosure - Realized and Net Change in Unrealized Gains (Losses) on Financial Instruments on Financial Instruments on Which Fair Value Option was Elected (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RealizedAndNetChangeInUnrealizedGainsLossesOnFinancialInstrumentsOnFinancialInstrumentsOnWhichFairValueOptionWasElectedDetail</Role>
      <ShortName>Realized and Net Change in Unrealized Gains (Losses) on Financial Instruments on Financial Instruments on Which Fair Value Option was Elected (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>999056 - Disclosure - Information for Financial Instruments on Which Fair Value Option was Elected (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/InformationForFinancialInstrumentsOnWhichFairValueOptionWasElectedDetail</Role>
      <ShortName>Information for Financial Instruments on Which Fair Value Option was Elected (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>999057 - Disclosure - Fair Value Option - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FairValueOptionAdditionalInformationDetail</Role>
      <ShortName>Fair Value Option - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>999058 - Disclosure - Financial Assets and Liabilities at Fair Value (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FinancialAssetsAndLiabilitiesAtFairValueDetail</Role>
      <ShortName>Financial Assets and Liabilities at Fair Value (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>999059 - Disclosure - Summary of Fair Value by Strategy Type Alongside Consolidated Funds of Hedge Funds' Remaining Unfunded Commitments and Ability to Redeem Such Investments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfFairValueByStrategyTypeAlongsideConsolidatedFundsOfHedgeFundsRemainingUnfundedCommitmentsAndAbilityToRedeemSuchInvestmentsDetail</Role>
      <ShortName>Summary of Fair Value by Strategy Type Alongside Consolidated Funds of Hedge Funds' Remaining Unfunded Commitments and Ability to Redeem Such Investments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>999060 - Disclosure - Summary of Fair Value by Strategy Type Alongside Consolidated Funds of Hedge Funds' Remaining Unfunded Commitments and Ability to Redeem Such Investments (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfFairValueByStrategyTypeAlongsideConsolidatedFundsOfHedgeFundsRemainingUnfundedCommitmentsAndAbilityToRedeemSuchInvestmentsParentheticalDetail</Role>
      <ShortName>Summary of Fair Value by Strategy Type Alongside Consolidated Funds of Hedge Funds' Remaining Unfunded Commitments and Ability to Redeem Such Investments (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>999061 - Disclosure - Summary of Quantitative Inputs and Assumptions for Items Categorized in Level III of Fair Value Hierarchy (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfQuantitativeInputsAndAssumptionsForItemsCategorizedInLevelIiiOfFairValueHierarchyDetail</Role>
      <ShortName>Summary of Quantitative Inputs and Assumptions for Items Categorized in Level III of Fair Value Hierarchy (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>999062 - Disclosure - Summary of Changes in Financial Assets and Liabilities Measured at Fair Value for Which Level III Inputs Were Used (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfChangesInFinancialAssetsAndLiabilitiesMeasuredAtFairValueForWhichLevelIiiInputsWereUsedDetail</Role>
      <ShortName>Summary of Changes in Financial Assets and Liabilities Measured at Fair Value for Which Level III Inputs Were Used (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>999063 - Disclosure - Fair Value Measurements of Financial instruments - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FairValueMeasurementsOfFinancialInstrumentsAdditionalInformationDetail</Role>
      <ShortName>Fair Value Measurements of Financial instruments - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>999064 - Disclosure - Maximum Exposure to Loss Relating to Non-Consolidated VIEs (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/MaximumExposureToLossRelatingToNonConsolidatedViesDetail</Role>
      <ShortName>Maximum Exposure to Loss Relating to Non-Consolidated VIEs (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>999065 - Disclosure - Repurchase Agreements - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RepurchaseAgreementsAdditionalInformationDetail</Role>
      <ShortName>Repurchase Agreements - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>999066 - Disclosure - Schedule of Repurchase Agreements Obligation by Type of Collateral Pledged (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ScheduleOfRepurchaseAgreementsObligationByTypeOfCollateralPledgedDetail</Role>
      <ShortName>Schedule of Repurchase Agreements Obligation by Type of Collateral Pledged (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>999067 - Disclosure - Components of Other Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ComponentsOfOtherAssetsDetail</Role>
      <ShortName>Components of Other Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>999068 - Disclosure - Other Assets - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OtherAssetsAdditionalInformationDetail</Role>
      <ShortName>Other Assets - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>999069 - Disclosure - Offsetting of Assets and Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OffsettingOfAssetsAndLiabilitiesDetail</Role>
      <ShortName>Offsetting of Assets and Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>999070 - Disclosure - Offsetting Of Assets And Liabilities - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/OffsettingOfAssetsAndLiabilitiesAdditionalInformationDetail</Role>
      <ShortName>Offsetting Of Assets And Liabilities - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>999071 - Disclosure - Borrowings - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/BorrowingsAdditionalInformationDetail</Role>
      <ShortName>Borrowings - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>999072 - Disclosure - Partnership Credit Facilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/PartnershipCreditFacilitiesDetail</Role>
      <ShortName>Partnership Credit Facilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>999073 - Disclosure - Partnership Credit Facilities (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/PartnershipCreditFacilitiesParentheticalDetail</Role>
      <ShortName>Partnership Credit Facilities (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>999074 - Disclosure - Carrying Value and Fair Value of Blackstone Issued Notes (Detail)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.blackstone.com/role/CarryingValueAndFairValueOfBlackstoneIssuedNotesDetail</Role>
      <ShortName>Carrying Value and Fair Value of Blackstone Issued Notes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>999075 - Disclosure - Carrying Value and Fair Value of Blackstone Issued Notes (Parenthetical) (Detail)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.blackstone.com/role/CarryingValueAndFairValueOfBlackstoneIssuedNotesParentheticalDetail</Role>
      <ShortName>Carrying Value and Fair Value of Blackstone Issued Notes (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>999076 - Disclosure - Scheduled Principal Payments for Borrowings (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ScheduledPrincipalPaymentsForBorrowingsDetail</Role>
      <ShortName>Scheduled Principal Payments for Borrowings (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>999077 - Disclosure - Leases - Additional informaton (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/LeasesAdditionalInformatonDetail</Role>
      <ShortName>Leases - Additional informaton (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>999078 - Disclosure - Leases Components of leases expenses (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/LeasesComponentsOfLeasesExpensesDetail</Role>
      <ShortName>Leases Components of leases expenses (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>999079 - Disclosure - Leases Supplemental Cash Flow Information Related Leases (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/LeasesSupplementalCashFlowInformationRelatedLeasesDetail</Role>
      <ShortName>Leases Supplemental Cash Flow Information Related Leases (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>999080 - Disclosure - Leases Cash flows Annual Basis For Operating Lease Liabilities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/LeasesCashFlowsAnnualBasisForOperatingLeaseLiabilitiesDetail</Role>
      <ShortName>Leases Cash flows Annual Basis For Operating Lease Liabilities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>999081 - Disclosure - Income Before Provision for Taxes (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/IncomeBeforeProvisionForTaxesDetail</Role>
      <ShortName>Income Before Provision for Taxes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>999082 - Disclosure - Provision (Benefit) for Income Taxes (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ProvisionBenefitForIncomeTaxesDetail</Role>
      <ShortName>Provision (Benefit) for Income Taxes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>999083 - Disclosure - Reconciliations of Effective Income Tax Rate to Federal Statutory Tax Rate (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ReconciliationsOfEffectiveIncomeTaxRateToFederalStatutoryTaxRateDetail</Role>
      <ShortName>Reconciliations of Effective Income Tax Rate to Federal Statutory Tax Rate (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>999084 - Disclosure - Reconciliations of Effective Income Tax Rate to Federal Statutory Tax Rate (Detail) (Parenthetical))</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ReconciliationsOfEffectiveIncomeTaxRateToFederalStatutoryTaxRateDetailParenthetical</Role>
      <ShortName>Reconciliations of Effective Income Tax Rate to Federal Statutory Tax Rate (Detail) (Parenthetical))</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>999085 - Disclosure - Income Taxes - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/IncomeTaxesAdditionalInformationDetail</Role>
      <ShortName>Income Taxes - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>999086 - Disclosure - Summary of Tax Effects of Temporary Differences (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfTaxEffectsOfTemporaryDifferencesDetail</Role>
      <ShortName>Summary of Tax Effects of Temporary Differences (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>999087 - Disclosure - Unrecognized Tax Benefits Excluding Related Interest and Penalties (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/UnrecognizedTaxBenefitsExcludingRelatedInterestAndPenaltiesDetail</Role>
      <ShortName>Unrecognized Tax Benefits Excluding Related Interest and Penalties (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>999088 - Disclosure - Schedule of Major Filing Jurisdictions and Open Period Subject to Examinations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ScheduleOfMajorFilingJurisdictionsAndOpenPeriodSubjectToExaminationsDetail</Role>
      <ShortName>Schedule of Major Filing Jurisdictions and Open Period Subject to Examinations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>999089 - Disclosure - Schedule Of Income Tax Paid By Individual Jurisdiction (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ScheduleOfIncomeTaxPaidByIndividualJurisdictionDetail</Role>
      <ShortName>Schedule Of Income Tax Paid By Individual Jurisdiction (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>999090 - Disclosure - Earnings Per Share and Stockholders' Equity - Basic and Diluted Net Income Per Common Stock (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EarningsPerShareAndStockholdersEquityBasicAndDilutedNetIncomePerCommonStockDetail</Role>
      <ShortName>Earnings Per Share and Stockholders' Equity - Basic and Diluted Net Income Per Common Stock (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>999091 - Disclosure - Earnings Per Share and Stockholders' Equity - Summary of Anti-Dilutive Securities (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EarningsPerShareAndStockholdersEquitySummaryOfAntiDilutiveSecuritiesDetail</Role>
      <ShortName>Earnings Per Share and Stockholders' Equity - Summary of Anti-Dilutive Securities (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>999092 - Disclosure - Earnings Per Share and Stockholders' Equity - Schedule of Shares Eligible For Dividends and Distribution (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EarningsPerShareAndStockholdersEquityScheduleOfSharesEligibleForDividendsAndDistributionDetail</Role>
      <ShortName>Earnings Per Share and Stockholders' Equity - Schedule of Shares Eligible For Dividends and Distribution (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>999093 - Disclosure -  Earnings Per Share and Stockholder's Equity - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EarningsPerShareAndStockholderSEquityAdditionalInformationDetail</Role>
      <ShortName> Earnings Per Share and Stockholder's Equity - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>999094 - Disclosure - Equity-Based Compensation - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EquityBasedCompensationAdditionalInformationDetail</Role>
      <ShortName>Equity-Based Compensation - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>999095 - Disclosure - Equity-Based Compensation - Summary of Status of Partnership's Unvested Equity-Based Awards (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EquityBasedCompensationSummaryOfStatusOfPartnershipsUnvestedEquityBasedAwardsDetail</Role>
      <ShortName>Equity-Based Compensation - Summary of Status of Partnership's Unvested Equity-Based Awards (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>999096 - Disclosure - 	 Equity-Based Compensation - Unvested Shares and Units, After Expected Forfeitures (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/EquityBasedCompensationUnvestedSharesAndUnitsAfterExpectedForfeituresDetail</Role>
      <ShortName>	 Equity-Based Compensation - Unvested Shares and Units, After Expected Forfeitures (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>999097 - Disclosure - Related Party Transactions - Due from Affiliates and Due to Affiliates (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RelatedPartyTransactionsDueFromAffiliatesAndDueToAffiliatesDetail</Role>
      <ShortName>Related Party Transactions - Due from Affiliates and Due to Affiliates (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>999098 - Disclosure - Related Party Transactions - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/RelatedPartyTransactionsAdditionalInformationDetail</Role>
      <ShortName>Related Party Transactions - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>999099 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/CommitmentsAndContingenciesAdditionalInformationDetail</Role>
      <ShortName>Commitments and Contingencies - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>999100 - Disclosure - Clawback Obligations by Segment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ClawbackObligationsBySegmentDetail</Role>
      <ShortName>Clawback Obligations by Segment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>999101 - Disclosure - Segment Reporting - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SegmentReportingAdditionalInformationDetail</Role>
      <ShortName>Segment Reporting - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>999102 - Disclosure - Summary of Revenue from External Customers by Geographic Areas (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/SummaryOfRevenueFromExternalCustomersByGeographicAreasDetail</Role>
      <ShortName>Summary of Revenue from External Customers by Geographic Areas (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>999103 - Disclosure - Financial Data of Segments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/FinancialDataOfSegmentsDetail</Role>
      <ShortName>Financial Data of Segments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>999104 - Disclosure - Reconciliation of Total Segments to Income (Loss) Before Provision for Taxes and Total Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ReconciliationOfTotalSegmentsToIncomeLossBeforeProvisionForTaxesAndTotalAssetsDetail</Role>
      <ShortName>Reconciliation of Total Segments to Income (Loss) Before Provision for Taxes and Total Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>999105 - Disclosure - Reconciliation of Total Segments to Income (Loss) Before Provision for Taxes and Total Assets (Parenthetical) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ReconciliationOfTotalSegmentsToIncomeLossBeforeProvisionForTaxesAndTotalAssetsParentheticalDetail</Role>
      <ShortName>Reconciliation of Total Segments to Income (Loss) Before Provision for Taxes and Total Assets (Parenthetical) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="d48618d10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>999106 - Disclosure - Reconciliation of Total Segments to Reported on the Consolidated Statements of Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.blackstone.com/role/ReconciliationOfTotalSegmentsToReportedOnTheConsolidatedStatementsOfOperationsDetail</Role>
      <ShortName>Reconciliation of Total Segments to Reported on the Consolidated Statements of Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>bx-20251231.xsd</File>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="d48618d10k.htm">d48618d10k.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>g48618dsp001.jpg</File>
    <File>g48618dsp093.jpg</File>
    <File>g48618dsp102.jpg</File>
    <File>g48618dsp109.jpg</File>
    <File>g48618dsp111.jpg</File>
    <File>g48618dsp112.jpg</File>
    <File>g48618dsp148.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="2">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="1835">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="13">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="37">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
