3.25.0.1 html 1879 330 1 true 163 0 false 9 false false R1.htm 0000001 - Document - Cover Sheet http://www.morganstanley.com/role/Cover Cover Cover 1 false false R2.htm 0000002 - Document - Audit Information Sheet http://www.morganstanley.com/role/AuditInformation Audit Information Cover 2 false false R3.htm 0000003 - Statement - Consolidated Statements of Assets and Liabilities Sheet http://www.morganstanley.com/role/ConsolidatedStatementsofAssetsandLiabilities Consolidated Statements of Assets and Liabilities Statements 3 false false R4.htm 0000004 - Statement - Consolidated Statements of Assets and Liabilities (Parenthetical) Sheet http://www.morganstanley.com/role/ConsolidatedStatementsofAssetsandLiabilitiesParenthetical Consolidated Statements of Assets and Liabilities (Parenthetical) Statements 4 false false R5.htm 0000005 - Statement - Consolidated Statements of Operations Sheet http://www.morganstanley.com/role/ConsolidatedStatementsofOperations Consolidated Statements of Operations Statements 5 false false R6.htm 0000006 - Statement - Consolidated Statements of Changes in Net Assets Sheet http://www.morganstanley.com/role/ConsolidatedStatementsofChangesinNetAssets Consolidated Statements of Changes in Net Assets Statements 6 false false R7.htm 0000007 - Statement - Consolidated Statements of Cash Flows Sheet http://www.morganstanley.com/role/ConsolidatedStatementsofCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 0000008 - Statement - Consolidated Schedule of Investments Sheet http://www.morganstanley.com/role/ConsolidatedScheduleofInvestments Consolidated Schedule of Investments Statements 8 false false R9.htm 0000009 - Disclosure - ORGANIZATION Sheet http://www.morganstanley.com/role/ORGANIZATION ORGANIZATION Notes 9 false false R10.htm 0000010 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES Sheet http://www.morganstanley.com/role/SIGNIFICANTACCOUNTINGPOLICIES SIGNIFICANT ACCOUNTING POLICIES Notes 10 false false R11.htm 0000011 - Disclosure - SIGNIFICANT AGREEMENTS AND RELATED PARTY TRANSACTIONS Sheet http://www.morganstanley.com/role/SIGNIFICANTAGREEMENTSANDRELATEDPARTYTRANSACTIONS SIGNIFICANT AGREEMENTS AND RELATED PARTY TRANSACTIONS Notes 11 false false R12.htm 0000012 - Disclosure - INVESTMENTS Sheet http://www.morganstanley.com/role/INVESTMENTS INVESTMENTS Notes 12 false false R13.htm 0000013 - Disclosure - FAIR VALUE MEASUREMENTS Sheet http://www.morganstanley.com/role/FAIRVALUEMEASUREMENTS FAIR VALUE MEASUREMENTS Notes 13 false false R14.htm 0000014 - Disclosure - DEBT Sheet http://www.morganstanley.com/role/DEBT DEBT Notes 14 false false R15.htm 0000015 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://www.morganstanley.com/role/COMMITMENTSANDCONTINGENCIES COMMITMENTS AND CONTINGENCIES Notes 15 false false R16.htm 0000016 - Disclosure - NET ASSETS Sheet http://www.morganstanley.com/role/NETASSETS NET ASSETS Notes 16 false false R17.htm 0000017 - Disclosure - EARNINGS (LOSS) PER SHARE Sheet http://www.morganstanley.com/role/EARNINGSLOSSPERSHARE EARNINGS (LOSS) PER SHARE Notes 17 false false R18.htm 0000018 - Disclosure - INCOME TAXES Sheet http://www.morganstanley.com/role/INCOMETAXES INCOME TAXES Notes 18 false false R19.htm 0000019 - Disclosure - CONSOLIDATED FINANCIAL HIGHLIGHTS Sheet http://www.morganstanley.com/role/CONSOLIDATEDFINANCIALHIGHLIGHTS CONSOLIDATED FINANCIAL HIGHLIGHTS Notes 19 false false R20.htm 0000020 - Disclosure - SEGMENT REPORTING Sheet http://www.morganstanley.com/role/SEGMENTREPORTING SEGMENT REPORTING Notes 20 false false R21.htm 0000021 - Disclosure - SUBSEQUENT EVENTS Sheet http://www.morganstanley.com/role/SUBSEQUENTEVENTS SUBSEQUENT EVENTS Notes 21 false false R22.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 22 false false R23.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 23 false false R24.htm 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 24 false false R25.htm 995470 - Disclosure - N-2 Sheet http://xbrl.sec.gov/cef/role/N2 N-2 Notes 25 false false R26.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 26 false false R27.htm 9955511 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies) Sheet http://www.morganstanley.com/role/SIGNIFICANTACCOUNTINGPOLICIESPolicies SIGNIFICANT ACCOUNTING POLICIES (Policies) Policies 27 false false R28.htm 9955512 - Disclosure - INVESTMENTS (Tables) Sheet http://www.morganstanley.com/role/INVESTMENTSTables INVESTMENTS (Tables) Tables http://www.morganstanley.com/role/INVESTMENTS 28 false false R29.htm 9955513 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) Sheet http://www.morganstanley.com/role/FAIRVALUEMEASUREMENTSTables FAIR VALUE MEASUREMENTS (Tables) Tables http://www.morganstanley.com/role/FAIRVALUEMEASUREMENTS 29 false false R30.htm 9955514 - Disclosure - DEBT (Tables) Sheet http://www.morganstanley.com/role/DEBTTables DEBT (Tables) Tables http://www.morganstanley.com/role/DEBT 30 false false R31.htm 9955515 - Disclosure - NET ASSETS (Tables) Sheet http://www.morganstanley.com/role/NETASSETSTables NET ASSETS (Tables) Tables http://www.morganstanley.com/role/NETASSETS 31 false false R32.htm 9955516 - Disclosure - EARNINGS (LOSS) PER SHARE (Tables) Sheet http://www.morganstanley.com/role/EARNINGSLOSSPERSHARETables EARNINGS (LOSS) PER SHARE (Tables) Tables http://www.morganstanley.com/role/EARNINGSLOSSPERSHARE 32 false false R33.htm 9955517 - Disclosure - INCOME TAXES (Tables) Sheet http://www.morganstanley.com/role/INCOMETAXESTables INCOME TAXES (Tables) Tables http://www.morganstanley.com/role/INCOMETAXES 33 false false R34.htm 9955518 - Disclosure - CONSOLIDATED FINANCIAL HIGHLIGHTS (Tables) Sheet http://www.morganstanley.com/role/CONSOLIDATEDFINANCIALHIGHLIGHTSTables CONSOLIDATED FINANCIAL HIGHLIGHTS (Tables) Tables http://www.morganstanley.com/role/CONSOLIDATEDFINANCIALHIGHLIGHTS 34 false false R35.htm 9955519 - Disclosure - ORGANIZATION (Details) Sheet http://www.morganstanley.com/role/ORGANIZATIONDetails ORGANIZATION (Details) Details http://www.morganstanley.com/role/ORGANIZATION 35 false false R36.htm 9955520 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) Sheet http://www.morganstanley.com/role/SIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) Details 36 false false R37.htm 9955521 - Disclosure - SIGNIFICANT AGREEMENTS AND RELATED PARTY TRANSACTIONS (Details) Sheet http://www.morganstanley.com/role/SIGNIFICANTAGREEMENTSANDRELATEDPARTYTRANSACTIONSDetails SIGNIFICANT AGREEMENTS AND RELATED PARTY TRANSACTIONS (Details) Details http://www.morganstanley.com/role/SIGNIFICANTAGREEMENTSANDRELATEDPARTYTRANSACTIONS 37 false false R38.htm 9955522 - Disclosure - INVESTMENTS - Composition of Investments at Fair Value (Details) Sheet http://www.morganstanley.com/role/INVESTMENTSCompositionofInvestmentsatFairValueDetails INVESTMENTS - Composition of Investments at Fair Value (Details) Details 38 false false R39.htm 9955523 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value Levels (Details) Sheet http://www.morganstanley.com/role/FAIRVALUEMEASUREMENTSFairValueLevelsDetails FAIR VALUE MEASUREMENTS - Fair Value Levels (Details) Details 39 false false R40.htm 9955524 - Disclosure - FAIR VALUE MEASUREMENTS - Level III Rollforward (Details) Sheet http://www.morganstanley.com/role/FAIRVALUEMEASUREMENTSLevelIIIRollforwardDetails FAIR VALUE MEASUREMENTS - Level III Rollforward (Details) Details 40 false false R41.htm 9955525 - Disclosure - FAIR VALUE MEASUREMENTS - Unobservable Inputs (Details) Sheet http://www.morganstanley.com/role/FAIRVALUEMEASUREMENTSUnobservableInputsDetails FAIR VALUE MEASUREMENTS - Unobservable Inputs (Details) Details 41 false false R42.htm 9955526 - Disclosure - FAIR VALUE MEASUREMENTS - Carrying Value and Fair Value of Debt (Details) Sheet http://www.morganstanley.com/role/FAIRVALUEMEASUREMENTSCarryingValueandFairValueofDebtDetails FAIR VALUE MEASUREMENTS - Carrying Value and Fair Value of Debt (Details) Details 42 false false R43.htm 9955527 - Disclosure - DEBT - Schedule of Debt Obligations (Details) Sheet http://www.morganstanley.com/role/DEBTScheduleofDebtObligationsDetails DEBT - Schedule of Debt Obligations (Details) Details 43 false false R44.htm 9955528 - Disclosure - DEBT - Summary Information of Debt Obligations (Details) Sheet http://www.morganstanley.com/role/DEBTSummaryInformationofDebtObligationsDetails DEBT - Summary Information of Debt Obligations (Details) Details 44 false false R45.htm 9955529 - Disclosure - DEBT - Narrative (Details) Sheet http://www.morganstanley.com/role/DEBTNarrativeDetails DEBT - Narrative (Details) Details 45 false false R46.htm 9955530 - Disclosure - DEBT - Schedule of Long-Term Debt (Details) Sheet http://www.morganstanley.com/role/DEBTScheduleofLongTermDebtDetails DEBT - Schedule of Long-Term Debt (Details) Details 46 false false R47.htm 9955531 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) Sheet http://www.morganstanley.com/role/COMMITMENTSANDCONTINGENCIESDetails COMMITMENTS AND CONTINGENCIES (Details) Details http://www.morganstanley.com/role/COMMITMENTSANDCONTINGENCIES 47 false false R48.htm 9955532 - Disclosure - NET ASSETS - Schedule of Distributable Earnings (Details) Sheet http://www.morganstanley.com/role/NETASSETSScheduleofDistributableEarningsDetails NET ASSETS - Schedule of Distributable Earnings (Details) Details 48 false false R49.htm 9955533 - Disclosure - NET ASSETS - Narrative (Details) Sheet http://www.morganstanley.com/role/NETASSETSNarrativeDetails NET ASSETS - Narrative (Details) Details 49 false false R50.htm 9955534 - Disclosure - NET ASSETS - Shares Issued From Capital Drawdowns (Details) Sheet http://www.morganstanley.com/role/NETASSETSSharesIssuedFromCapitalDrawdownsDetails NET ASSETS - Shares Issued From Capital Drawdowns (Details) Details 50 false false R51.htm 9955535 - Disclosure - NET ASSETS - Distributions Declared and Payable (Details) Sheet http://www.morganstanley.com/role/NETASSETSDistributionsDeclaredandPayableDetails NET ASSETS - Distributions Declared and Payable (Details) Details 51 false false R52.htm 9955536 - Disclosure - NET ASSETS - Summary of Shares Repurchased (Details) Sheet http://www.morganstanley.com/role/NETASSETSSummaryofSharesRepurchasedDetails NET ASSETS - Summary of Shares Repurchased (Details) Details 52 false false R53.htm 9955537 - Disclosure - EARNINGS (LOSS) PER SHARE (Details) Sheet http://www.morganstanley.com/role/EARNINGSLOSSPERSHAREDetails EARNINGS (LOSS) PER SHARE (Details) Details http://www.morganstanley.com/role/EARNINGSLOSSPERSHARETables 53 false false R54.htm 9955538 - Disclosure - INCOME TAXES - Schedule of Tax Character of Distributions (Details) Sheet http://www.morganstanley.com/role/INCOMETAXESScheduleofTaxCharacterofDistributionsDetails INCOME TAXES - Schedule of Tax Character of Distributions (Details) Details 54 false false R55.htm 9955539 - Disclosure - INCOME TAXES - Narrative (Details) Sheet http://www.morganstanley.com/role/INCOMETAXESNarrativeDetails INCOME TAXES - Narrative (Details) Details 55 false false R56.htm 9955540 - Disclosure - INCOME TAXES - Schedule of Book-to-Tax Distributions (Details) Sheet http://www.morganstanley.com/role/INCOMETAXESScheduleofBooktoTaxDistributionsDetails INCOME TAXES - Schedule of Book-to-Tax Distributions (Details) Details 56 false false R57.htm 9955541 - Disclosure - INCOME TAXES - Schedule of Cost of Investments (Details) Sheet http://www.morganstanley.com/role/INCOMETAXESScheduleofCostofInvestmentsDetails INCOME TAXES - Schedule of Cost of Investments (Details) Details 57 false false R58.htm 9955542 - Disclosure - CONSOLIDATED FINANCIAL HIGHLIGHTS (Details) Sheet http://www.morganstanley.com/role/CONSOLIDATEDFINANCIALHIGHLIGHTSDetails CONSOLIDATED FINANCIAL HIGHLIGHTS (Details) Details http://www.morganstanley.com/role/CONSOLIDATEDFINANCIALHIGHLIGHTSTables 58 false false R59.htm 9955543 - Disclosure - Segment Reporting (Details) Sheet http://www.morganstanley.com/role/SegmentReportingDetails Segment Reporting (Details) Details 59 false false R60.htm 9955544 - Disclosure - SUBSEQUENT EVENTS - Narrative (Details) Sheet http://www.morganstanley.com/role/SUBSEQUENTEVENTSNarrativeDetails SUBSEQUENT EVENTS - Narrative (Details) Details 60 false false All Reports Book All Reports msdlf-20241231.htm msdlf-20241231.xsd msdlf-20241231_cal.xml msdlf-20241231_def.xml msdlf-20241231_lab.xml msdlf-20241231_pre.xml msdlf-20241231_g1.jpg msdlf-20241231_g2.jpg http://fasb.org/srt/2024 http://fasb.org/us-gaap/2024 http://xbrl.sec.gov/cef/2024 http://xbrl.sec.gov/cyd/2024 http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/ecd/2024 true true