<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>310</ContextCount>
  <ElementCount>379</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>91</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>12</UnitCount>
  <MyReports>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>75000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>75010 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnaudited</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>75020 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnauditedParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>75030 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperationsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Operations (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>75040 - Statement - Condensed Consolidated Statements of Changes in Equity (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/StatementCondensedConsolidatedStatementsOfChangesInEquityUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Equity (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>75050 - Statement - Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/StatementCondensedConsolidatedStatementsOfChangesInEquityUnauditedParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>75060 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.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>8</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995455 - Disclosure - Organization and Business Purpose</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureOrganizationAndBusinessPurpose</Role>
      <ShortName>Organization and Business Purpose</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995465 - Disclosure - Capitalization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureCapitalization</Role>
      <ShortName>Capitalization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995475 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995485 - Disclosure - Investments in Real Estate</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstate2</Role>
      <ShortName>Investments in Real Estate</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995495 - Disclosure - Investments in Real Estate Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateDebt</Role>
      <ShortName>Investments in Real Estate Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995505 - Disclosure - Investments in Real Estate-Related and Other Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstaterelatedAndOtherSecurities</Role>
      <ShortName>Investments in Real Estate-Related and Other Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995515 - Disclosure - Intangibles</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureIntangibles</Role>
      <ShortName>Intangibles</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995525 - Disclosure - Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMortgageNotesRepurchaseFacilityAndUnsecuredRevolvingCreditFacility</Role>
      <ShortName>Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995535 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995545 - Disclosure - Other Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureOtherAssetsAndLiabilities</Role>
      <ShortName>Other Assets and Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995555 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995565 - Disclosure - Equity and Redeemable Non-Controlling Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterest</Role>
      <ShortName>Equity and Redeemable Non-Controlling Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995575 - Disclosure - Mandatorily Redeemable Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMandatorilyRedeemableInstruments</Role>
      <ShortName>Mandatorily Redeemable Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995585 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995595 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995605 - Disclosure - Derivatives</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureDerivatives1</Role>
      <ShortName>Derivatives</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995615 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995635 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995645 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995655 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995665 - Disclosure - Investments in Real Estate (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateTables</Role>
      <ShortName>Investments in Real Estate (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstate2</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995675 - Disclosure - Investments in Real Estate Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateDebtTables</Role>
      <ShortName>Investments in Real Estate Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstate2</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995685 - Disclosure - Investments in Real Estate-Related and Other Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstaterelatedAndOtherSecuritiesTables</Role>
      <ShortName>Investments in Real Estate-Related and Other Securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstaterelatedAndOtherSecurities</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995695 - Disclosure - Intangibles (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureIntangiblesTables</Role>
      <ShortName>Intangibles (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureIntangibles</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995705 - Disclosure - Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMortgageNotesRepurchaseFacilityAndUnsecuredRevolvingCreditFacilityTables</Role>
      <ShortName>Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMortgageNotesRepurchaseFacilityAndUnsecuredRevolvingCreditFacility</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995715 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureRelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureRelatedPartyTransactions</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995725 - Disclosure - Other Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureOtherAssetsAndLiabilitiesTables</Role>
      <ShortName>Other Assets and Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureOtherAssetsAndLiabilities</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995735 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureLeases</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995745 - Disclosure - Equity and Redeemable Non-Controlling Interest (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterestTables</Role>
      <ShortName>Equity and Redeemable Non-Controlling Interest (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterest</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995755 - Disclosure - Mandatorily Redeemable Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMandatorilyRedeemableInstrumentsTables</Role>
      <ShortName>Mandatorily Redeemable Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMandatorilyRedeemableInstruments</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995765 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEarningsPerShare</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995775 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSegmentReporting</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995785 - Disclosure - Derivatives (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureDerivativesTables</Role>
      <ShortName>Derivatives (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureDerivatives1</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995795 - Disclosure - Organization and Business Purpose - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureOrganizationAndBusinessPurposeAdditionalInformationDetails</Role>
      <ShortName>Organization and Business Purpose - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995805 - Disclosure - Capitalization - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureCapitalizationAdditionalInformationDetails</Role>
      <ShortName>Capitalization - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995815 - Disclosure - Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfEstimatedUsefulLivesOfAssetsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995825 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995835 - Disclosure - Summary of Significant Accounting Policies - Schedule of Company's Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCompanysAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Company's Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995845 - Disclosure - Summary of Significant Accounting Policies - Schedule of Company's Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCompanysAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisUsingLevel3Deta</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Company's Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>995855 - Disclosure - Summary of Significant Accounting Policies - Schedule of Quantitative Inputs and Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfQuantitativeInputsAndAssumptionsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Quantitative Inputs and Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>995875 - Disclosure - Summary of Significant Accounting Policies - Schedule of Carrying Value and Fair Value of Financial Instruments - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfCarryingValueAndFairValueOfFinancialInstrumentsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Carrying Value and Fair Value of Financial Instruments - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>995885 - Disclosure - Investments in Real Estate - Schedule of Investments in Real Estate, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateScheduleOfInvestmentsInRealEstateNetDetails</Role>
      <ShortName>Investments in Real Estate - Schedule of Investments in Real Estate, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>995895 - Disclosure - Investments in Real Estate - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateAdditionalInformationDetails</Role>
      <ShortName>Investments in Real Estate - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>995925 - Disclosure - Investments in Real Estate Debt - Summary of Company Investments In Real Estate Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateDebtSummaryOfCompanyInvestmentsInRealEstateDebtDetails</Role>
      <ShortName>Investments in Real Estate Debt - Summary of Company Investments In Real Estate Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>995935 - Disclosure - Investments in Real Estate Debt - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateDebtAdditionalInformationDetails</Role>
      <ShortName>Investments in Real Estate Debt - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>995945 - Disclosure - Investments in Real Estate Debt - Schedule of Amounts Recognized for Investments in Real Estate Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstateDebtScheduleOfAmountsRecognizedForInvestmentsInRealEstateDebtDetails</Role>
      <ShortName>Investments in Real Estate Debt - Schedule of Amounts Recognized for Investments in Real Estate Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>995955 - Disclosure - Investments in Real Estate-Related and Other Securities - Summary of Investments in Real Estate-related and Other Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstaterelatedAndOtherSecuritiesSummaryOfInvestmentsInRealEstaterelatedAndOtherSecuritiesDetails</Role>
      <ShortName>Investments in Real Estate-Related and Other Securities - Summary of Investments in Real Estate-related and Other Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>995975 - Disclosure - Investments in Real Estate-Related and Other Securities - Summary of Income Recognized from Investments in Real Estate-related and Other Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureInvestmentsInRealEstaterelatedAndOtherSecuritiesSummaryOfIncomeRecognizedFromInvestmentsInRealEstaterelatedAndOtherSecuritiesDet</Role>
      <ShortName>Investments in Real Estate-Related and Other Securities - Summary of Income Recognized from Investments in Real Estate-related and Other Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>995995 - Disclosure - Intangibles - Schedule of Gross Carrying Amount and Accumulated Amortization of Intangibles Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureIntangiblesScheduleOfGrossCarryingAmountAndAccumulatedAmortizationOfIntangiblesAssetsAndLiabilitiesDetails</Role>
      <ShortName>Intangibles - Schedule of Gross Carrying Amount and Accumulated Amortization of Intangibles Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>996005 - Disclosure - Intangibles - Schedule of Estimated Future Amortization Intangibles (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureIntangiblesScheduleOfEstimatedFutureAmortizationIntangiblesDetails</Role>
      <ShortName>Intangibles - Schedule of Estimated Future Amortization Intangibles (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>996025 - Disclosure - Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Summary of the Mortgage Notes Secured by Properties and Repurchase Facility (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMortgageNotesRepurchaseFacilityAndUnsecuredRevolvingCreditFacilitySummaryOfTheMortgageNotesSecuredByPropertiesAndRepurchaseFacil1</Role>
      <ShortName>Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Summary of the Mortgage Notes Secured by Properties and Repurchase Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>996035 - Disclosure - Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Summary of the Mortgage Notes Secured by Properties and Repurchase Facility (Parenthetical) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMortgageNotesRepurchaseFacilityAndUnsecuredRevolvingCreditFacilitySummaryOfTheMortgageNotesSecuredByPropertiesAndRepurchaseFacil</Role>
      <ShortName>Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Summary of the Mortgage Notes Secured by Properties and Repurchase Facility (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>996045 - Disclosure - Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Additional Information (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMortgageNotesRepurchaseFacilityAndUnsecuredRevolvingCreditFacilityAdditionalInformationDetails</Role>
      <ShortName>Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>996055 - Disclosure - Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Summary of Future Principal Payment Due Under Mortgage Notes and Repurchase Facility (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMortgageNotesRepurchaseFacilityAndUnsecuredRevolvingCreditFacilitySummaryOfFuturePrincipalPaymentDueUnderMortgageNotesAndRepurch</Role>
      <ShortName>Mortgage Notes, Repurchase Facility and Unsecured Revolving Credit Facility - Summary of Future Principal Payment Due Under Mortgage Notes and Repurchase Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>996065 - Disclosure - Related Party Transactions - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/Role_DisclosureRelatedPartyTransactionsAdditionalInformationDetails</Role>
      <ShortName>Related Party Transactions - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>996075 - Disclosure - Related Party Transactions - Components of Due to Affiliates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureRelatedPartyTransactionsComponentsOfDueToAffiliatesDetails</Role>
      <ShortName>Related Party Transactions - Components of Due to Affiliates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>996095 - Disclosure - Other Assets and Liabilities - Components of Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureOtherAssetsAndLiabilitiesComponentsOfOtherAssetsDetails</Role>
      <ShortName>Other Assets and Liabilities - Components of Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>996105 - Disclosure - Other Assets and Liabilities - Components of Accounts Payable, Accrued Expenses and Other Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureOtherAssetsAndLiabilitiesComponentsOfAccountsPayableAccruedExpensesAndOtherLiabilitiesDetails</Role>
      <ShortName>Other Assets and Liabilities - Components of Accounts Payable, Accrued Expenses and Other Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>996115 - Disclosure - Other Assets and Liabilities - Components of Accounts Payable, Accrued Expenses and Other Liabilities (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureOtherAssetsAndLiabilitiesComponentsOfAccountsPayableAccruedExpensesAndOtherLiabilitiesParentheticalDetails</Role>
      <ShortName>Other Assets and Liabilities - Components of Accounts Payable, Accrued Expenses and Other Liabilities (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>996125 - Disclosure - Leases - Schedule of Components of Operating Lease Income from Industrial Property (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureLeasesScheduleOfComponentsOfOperatingLeaseIncomeFromIndustrialPropertyDetails</Role>
      <ShortName>Leases - Schedule of Components of Operating Lease Income from Industrial Property (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>996145 - Disclosure - Leases - Schedule of Future Minimum Rents Expects to Receive from Industrial Property (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureLeasesScheduleOfFutureMinimumRentsExpectsToReceiveFromIndustrialPropertyDetails</Role>
      <ShortName>Leases - Schedule of Future Minimum Rents Expects to Receive from Industrial Property (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>996155 - Disclosure - Equity and Redeemable Non-Controlling Interest - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterestAdditionalInformationDetails</Role>
      <ShortName>Equity and Redeemable Non-Controlling Interest - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>996165 - Disclosure - Equity and Redeemable Non-Controlling Interest - Schedule of Number of Shares Authorized and Par Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterestScheduleOfNumberOfSharesAuthorizedAndParValueDetails</Role>
      <ShortName>Equity and Redeemable Non-Controlling Interest - Schedule of Number of Shares Authorized and Par Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>996175 - Disclosure - Equity and Redeemable Non-Controlling Interest - Schedule of Outstanding Shares of Common Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterestScheduleOfOutstandingSharesOfCommonStockDetails</Role>
      <ShortName>Equity and Redeemable Non-Controlling Interest - Schedule of Outstanding Shares of Common Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>996185 - Disclosure - Equity and Redeemable Non-Controlling Interest - Schedule of Distributions Declared for Shares of Each Applicable Class of Common Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterestScheduleOfDistributionsDeclaredForSharesOfEachApplicableClassOfCommonStockDetails</Role>
      <ShortName>Equity and Redeemable Non-Controlling Interest - Schedule of Distributions Declared for Shares of Each Applicable Class of Common Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>996195 - Disclosure - Equity and Redeemable Non-Controlling Interest - Schedule of Aggregate Distributions Declared for Shares of Each Applicable Class of Common Stock (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEquityAndRedeemableNoncontrollingInterestScheduleOfAggregateDistributionsDeclaredForSharesOfEachApplicableClassOfCommonStockPare</Role>
      <ShortName>Equity and Redeemable Non-Controlling Interest - Schedule of Aggregate Distributions Declared for Shares of Each Applicable Class of Common Stock (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>996205 - Disclosure - Mandatorily Redeemable Instruments - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMandatorilyRedeemableInstrumentsAdditionalInformationDetails</Role>
      <ShortName>Mandatorily Redeemable Instruments - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>996215 - Disclosure - Mandatorily Redeemable Instruments - Summary Of Mandatorily Redeemable Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMandatorilyRedeemableInstrumentsSummaryOfMandatorilyRedeemableActivityDetails</Role>
      <ShortName>Mandatorily Redeemable Instruments - Summary Of Mandatorily Redeemable Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>996225 - Disclosure - Mandatorily Redeemable Instruments - Summary of Future Payments Due Under Mandatorily Redeemable Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureMandatorilyRedeemableInstrumentsSummaryOfFuturePaymentsDueUnderMandatorilyRedeemableInstrumentsDetails</Role>
      <ShortName>Mandatorily Redeemable Instruments - Summary of Future Payments Due Under Mandatorily Redeemable Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>996235 - Disclosure - Earnings Per Share - Schedule of Net (Loss) Income and Weighted Average Number of Shares Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEarningsPerShareScheduleOfNetLossIncomeAndWeightedAverageNumberOfSharesOutstandingDetails</Role>
      <ShortName>Earnings Per Share - Schedule of Net (Loss) Income and Weighted Average Number of Shares Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>996245 - Disclosure - Earnings Per Share - Schedule of Computations of Basic and Diluted Net (Loss) Income per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureEarningsPerShareScheduleOfComputationsOfBasicAndDilutedNetLossIncomePerShareDetails</Role>
      <ShortName>Earnings Per Share - Schedule of Computations of Basic and Diluted Net (Loss) Income per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>996255 - Disclosure - Segment Reporting - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSegmentReportingAdditionalInformationDetails</Role>
      <ShortName>Segment Reporting - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>996265 - Disclosure - Segment Reporting - Summary of Total Assets by Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSegmentReportingSummaryOfTotalAssetsBySegmentDetails</Role>
      <ShortName>Segment Reporting - Summary of Total Assets by Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>996275 - Disclosure - Segment Reporting - Summary of Financial Results by Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSegmentReportingSummaryOfFinancialResultsBySegmentDetails</Role>
      <ShortName>Segment Reporting - Summary of Financial Results by Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>996285 - Disclosure - Derivatives - Schedule of Outstanding Derivatives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureDerivativesScheduleOfOutstandingDerivativesDetails</Role>
      <ShortName>Derivatives - Schedule of Outstanding Derivatives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>996295 - Disclosure - Derivatives - Schedule of Fair Value of Derivative Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureDerivativesScheduleOfFairValueOfDerivativeFinancialInstrumentsDetails</Role>
      <ShortName>Derivatives - Schedule of Fair Value of Derivative Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="ck0001893262-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>996315 - Disclosure - Subsequent Events - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.jpmorgan.com/20260331/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetails</Role>
      <ShortName>Subsequent Events - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ck0001893262-20260331.htm">ck0001893262-20260331.htm</File>
    <File>ck0001893262-20260331.xsd</File>
  </InputFiles>
  <SupplementalFiles>
    <File>img257241950_0.jpg</File>
    <File>img257241950_1.jpg</File>
    <File>img257241950_2.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="745">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="33">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>false</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
