MSILF Prime Portfolio MSILF Prime Portfolio MSILF Government Portfolio MSILF Government Portfolio MSILF Government Securities Portfolio MSILF Government Securities Portfolio MSILF Treasury Portfolio MSILF Treasury Portfolio MSILF Treasury Securities Portfolio MSILF Treasury Securities Portfolio MSILF Tax-Exempt Portfolio MSILF Tax-Exempt Portfolio MSILF Money Market Portfolio MSILF Money Market Portfolio Dmsilfinstitutionalclassportfolioscpspfebruary_17133 Morgan Stanley Institutional Liquidity Funds - Institutional Class Portfolios Dmsilfinstitutionalinstplusclassportfoliosbpspjuly_17130 Morgan Stanley Institutional Liquidity Funds - Institutional Plus Class Portfolios Dmsilfinstitutionalinstselectclassportfolioscpspfebruary_17177 Morgan Stanley Institutional Liquidity Funds - Institutional Select Class Portfolios Dmsilfinstitutionalinvestorclassportfolioscpspfebruary_17176 Morgan Stanley Institutional Liquidity Funds - Investor Class Portfolios Dmsilfinstitutionaladminclassportfoliosbpspfebruary_17179 Morgan Stanley Institutional Liquidity Funds - Administrative Class Portfolios Dmsilfinstitutionaladvisoryclassportfolioscpspfebruary_17136 Morgan Stanley Institutional Liquidity Funds - Advisory Class Portfolios Dmsilfinstitutionalparticipantclassportfolioscpspfebruary_17138 Morgan Stanley Institutional Liquidity Funds - Participant Class Portfolios Dmsilfinstitutionalcashmanagementclassportfolioscpspfebruary_17137 Morgan Stanley Institutional Liquidity Funds - Cash Management Class Portfolios Dmsilfinstitutionalselectclassportfolioscpspfebruary_17178 Morgan Stanley Institutional Liquidity Funds - Select Class Portfolios Dmsilfcastleoaksharescpspfebruary_17131 Morgan Stanley Institutional Liquidity Funds - CastleOak Share Class Dmsilfinstitutionalimpactclassportfolioscpspfebruary_17134 Morgan Stanley Institutional Liquidity Funds - Impact Class Portfolios Dmsilfinstitutionalimpactpartnerclassportfolioscpspfebruary_17135 Morgan Stanley Institutional Liquidity Funds - Impact Partner Class Portfolios Dmsilfinstitutionaladvisorclassprospectuscfebruary_17132 Morgan Stanley Institutional Liquidity Funds - Advisor Class Portfolios Dmsilfinstitutionalsaibjuly_17019 MSILF Institutional SAI 485B_July 2025 Class Administrative - C000011672 Administrative Class Class Advisory - C000011673 Advisory Class Class Institutional - C000011674 Institutional Class Class Participant - C000011675 Participant Class Class Investor - C000011676 Investor Class Class Institutional Select - C000011677 Institutional Select Class Class Cash Management - C000017910 Cash Management Class Impact Share Class - C000234746 Impact Share Class Class CastleOak - C000238341 CastleOak Class Impact Partner Class - C000248674 Impact Partner Class Class Administrative - C000011654 Administrative Class Class Advisory - C000011655 Advisory Class Class Institutional - C000011656 Institutional Class Class Investor - C000011657 Investor Class Class Participant - C000011658 Participant Class Class Institutional Select - C000011659 Institutional Select Class Class Cash Management - C000017907 Cash Management Class Class Select - C000167931 Select Class Class CastleOak - C000227505 CastleOak Class Impact Share Class - C000234745 Impact Share Class Impact Partner Class - C000248673 Impact Partner Class Class Advisor - C000248991 Advisor Class Class Institutional Plus - C000263898 Institutional Plus Class Class Administrative - C000011660 Administrative Class Class Advisory - C000011661 Advisory Class Class Institutional - C000011662 Institutional Class Class Investor - C000011663 Investor Class Class Participant - C000011664 Participant Class Class Institutional Select - C000011665 Institutional Select Class Class Cash Management - C000017908 Cash Management Class Class Administrative - C000011684 Administrative Class Class Advisory - C000011685 Advisory Class Class Institutional - C000011686 Institutional Class Class Investor - C000011687 Investor Class Class Participant - C000011688 Participant Class Class Institutional Select - C000011689 Institutional Select Class Class Cash Management - C000017912 Cash Management Class Class Select - C000167932 Select Class Class Advisor - C000248994 Advisor Class Class Institutional Plus - C000263899 Institutional Plus Class Class Administrative - C000011690 Administrative Class Class Advisory - C000011691 Advisory Class Class Institutional - C000011692 Institutional Class Class Investor - C000011693 Investor Class Class Participant - C000011694 Participant Class Class Institutional Select - C000011695 Institutional Select Class Class Cash Management - C000017913 Cash Management Class Class Select - C000167933 Select Class Impact Share Class - C000248675 Impact Share Class Impact Partner Class - C000248676 Impact Partner Class Class Advisor - C000251131 Advisor Class Class Institutional Plus - C000263900 Institutional Plus Class Class DAP - C000271635 DAP Class Class Administrative - C000011678 Administrative Class Class Advisory - C000011679 Advisory Class Class Institutional - C000011680 Institutional Class Class Investor - C000011681 Investor Class Class Participant - C000011682 Participant Class Class Institutional Select - C000011683 Institutional Select Class Class Cash Management - C000017911 Cash Management Class Class Wealth - C000248682 Wealth Class Class Select - C000248683 Select Class Wealth S Class - C000248684 Wealth S Class Class Advisor - C000248993 Advisor Class Class Administrative - C000011666 Administrative Class Class Advisory - C000011667 Advisory Class Class Wealth - C000011668 Wealth Class Class Investor - C000011669 Investor Class Class Participant - C000011670 Participant Class Class Wealth S - C000011671 Wealth S Class Class Cash Management - C000017909 Cash Management Class Class CastleOak - C000227506 CastleOak Class Class Select - C000240958 Select Class Impact Partner Class - C000248681 Impact Partner Class Class Advisor - C000248992 Advisor Class Bank Obligations Bank Obligations [Member] Commercial Paper Commercial Paper [Member] Asset-Backed Securities Asset-Backed Securities [Member] Foreign Securities Foreign Securities [Member] Municipal Obligations Municipal Obligations [Member] Floating NAV Risk Floating NAV Risk [Member] Discretionary Liquidity Fee Risk Discretionary Liquidity Fee Risk [Member] Mandatory Liquidity Fee Risk Mandatory Liquidity Fee Risk [Member] Repurchase Agreements Repurchase Agreements [Member] Credit and Interest Rate Risk Credit and Interest Rate Risk [Member] Fixed-Income Securities Fixed-Income Securities [Member] U.S. Treasury Obligations U.S. Treasury Obligations [Member] U.S. Government Securities U.S. Government Securities [Member] Market and Geopolitical Risk Market and Geopolitical Risk [Member] Large Transactions Risk Large Transactions Risk [Member] Stable NAV Risk Stable NAV Risk [Member] Active Management Risk Active Management Risk [Member]