v3.25.4
Expense Example
Oct. 31, 2025
USD ($)
Morgan Stanley Institutional Liquidity Funds - Institutional Class Portfolios | MSILF Prime Portfolio | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 20
Expense Example, with Redemption, 3 Years 69
Expense Example, with Redemption, 5 Years 122
Expense Example, with Redemption, 10 Years 278
Morgan Stanley Institutional Liquidity Funds - Institutional Class Portfolios | MSILF Government Portfolio | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 15
Expense Example, with Redemption, 3 Years 59
Expense Example, with Redemption, 5 Years 108
Expense Example, with Redemption, 10 Years 250
Morgan Stanley Institutional Liquidity Funds - Institutional Class Portfolios | MSILF Government Securities Portfolio | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 71
Expense Example, with Redemption, 5 Years 126
Expense Example, with Redemption, 10 Years 290
Morgan Stanley Institutional Liquidity Funds - Institutional Class Portfolios | MSILF Treasury Portfolio | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 67
Expense Example, with Redemption, 5 Years 117
Expense Example, with Redemption, 10 Years 267
Morgan Stanley Institutional Liquidity Funds - Institutional Class Portfolios | MSILF Treasury Securities Portfolio | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 67
Expense Example, with Redemption, 5 Years 117
Expense Example, with Redemption, 10 Years 267
Morgan Stanley Institutional Liquidity Funds - Institutional Plus Class Portfolios | MSILF Government Portfolio | Institutional Plus Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 17
Expense Example, with Redemption, 3 Years 66
Expense Example, with Redemption, 5 Years 119
Expense Example, with Redemption, 10 Years 275
Morgan Stanley Institutional Liquidity Funds - Institutional Plus Class Portfolios | MSILF Treasury Portfolio | Institutional Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 23
Expense Example, with Redemption, 3 Years 73
Expense Example, with Redemption, 5 Years 129
Expense Example, with Redemption, 10 Years 292
Morgan Stanley Institutional Liquidity Funds - Institutional Plus Class Portfolios | MSILF Treasury Securities Portfolio | Institutional Plus Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 23
Expense Example, with Redemption, 3 Years 73
Expense Example, with Redemption, 5 Years 129
Expense Example, with Redemption, 10 Years 292
Morgan Stanley Institutional Liquidity Funds - Institutional Select Class Portfolios | MSILF Prime Portfolio | Institutional Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 26
Expense Example, with Redemption, 3 Years 85
Expense Example, with Redemption, 5 Years 150
Expense Example, with Redemption, 10 Years 341
Morgan Stanley Institutional Liquidity Funds - Institutional Select Class Portfolios | MSILF Government Portfolio | Institutional Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 75
Expense Example, with Redemption, 5 Years 136
Expense Example, with Redemption, 10 Years 313
Morgan Stanley Institutional Liquidity Funds - Institutional Select Class Portfolios | MSILF Government Securities Portfolio | Institutional Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 26
Expense Example, with Redemption, 3 Years 87
Expense Example, with Redemption, 5 Years 154
Expense Example, with Redemption, 10 Years 353
Morgan Stanley Institutional Liquidity Funds - Institutional Select Class Portfolios | MSILF Treasury Portfolio | Institutional Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 26
Expense Example, with Redemption, 3 Years 83
Expense Example, with Redemption, 5 Years 145
Expense Example, with Redemption, 10 Years 330
Morgan Stanley Institutional Liquidity Funds - Institutional Select Class Portfolios | MSILF Treasury Securities Portfolio | Institutional Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 26
Expense Example, with Redemption, 3 Years 83
Expense Example, with Redemption, 5 Years 145
Expense Example, with Redemption, 10 Years 330
Morgan Stanley Institutional Liquidity Funds - Investor Class Portfolios | MSILF Prime Portfolio | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 101
Expense Example, with Redemption, 5 Years 178
Expense Example, with Redemption, 10 Years 404
Morgan Stanley Institutional Liquidity Funds - Investor Class Portfolios | MSILF Government Portfolio | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 26
Expense Example, with Redemption, 3 Years 91
Expense Example, with Redemption, 5 Years 164
Expense Example, with Redemption, 10 Years 376
Morgan Stanley Institutional Liquidity Funds - Investor Class Portfolios | MSILF Government Securities Portfolio | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 103
Expense Example, with Redemption, 5 Years 182
Expense Example, with Redemption, 10 Years 415
Morgan Stanley Institutional Liquidity Funds - Investor Class Portfolios | MSILF Treasury Portfolio | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 99
Expense Example, with Redemption, 5 Years 173
Expense Example, with Redemption, 10 Years 392
Morgan Stanley Institutional Liquidity Funds - Investor Class Portfolios | MSILF Treasury Securities Portfolio | Investor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 99
Expense Example, with Redemption, 5 Years 173
Expense Example, with Redemption, 10 Years 392
Morgan Stanley Institutional Liquidity Funds - Administrative Class Portfolios | MSILF Prime Portfolio | Administrative Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 117
Expense Example, with Redemption, 5 Years 206
Expense Example, with Redemption, 10 Years 466
Morgan Stanley Institutional Liquidity Funds - Administrative Class Portfolios | MSILF Government Portfolio | Administrative Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 107
Expense Example, with Redemption, 5 Years 191
Expense Example, with Redemption, 10 Years 438
Morgan Stanley Institutional Liquidity Funds - Administrative Class Portfolios | MSILF Government Securities Portfolio | Administrative Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 119
Expense Example, with Redemption, 5 Years 210
Expense Example, with Redemption, 10 Years 477
Morgan Stanley Institutional Liquidity Funds - Administrative Class Portfolios | MSILF Treasury Portfolio | Administrative Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 115
Expense Example, with Redemption, 5 Years 201
Expense Example, with Redemption, 10 Years 455
Morgan Stanley Institutional Liquidity Funds - Administrative Class Portfolios | MSILF Treasury Securities Portfolio | Administrative Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 115
Expense Example, with Redemption, 5 Years 201
Expense Example, with Redemption, 10 Years 455
Morgan Stanley Institutional Liquidity Funds - Advisory Class Portfolios | MSILF Prime Portfolio | Advisory Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 149
Expense Example, with Redemption, 5 Years 261
Expense Example, with Redemption, 10 Years 590
Morgan Stanley Institutional Liquidity Funds - Advisory Class Portfolios | MSILF Government Portfolio | Advisory Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 41
Expense Example, with Redemption, 3 Years 139
Expense Example, with Redemption, 5 Years 247
Expense Example, with Redemption, 10 Years 562
Morgan Stanley Institutional Liquidity Funds - Advisory Class Portfolios | MSILF Government Securities Portfolio | Advisory Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 151
Expense Example, with Redemption, 5 Years 266
Expense Example, with Redemption, 10 Years 601
Morgan Stanley Institutional Liquidity Funds - Advisory Class Portfolios | MSILF Treasury Portfolio | Advisory Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 147
Expense Example, with Redemption, 5 Years 257
Expense Example, with Redemption, 10 Years 578
Morgan Stanley Institutional Liquidity Funds - Advisory Class Portfolios | MSILF Treasury Securities Portfolio | Advisory Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 147
Expense Example, with Redemption, 5 Years 257
Expense Example, with Redemption, 10 Years 578
Morgan Stanley Institutional Liquidity Funds - Participant Class Portfolios | MSILF Prime Portfolio | Participant Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 228
Expense Example, with Redemption, 5 Years 399
Expense Example, with Redemption, 10 Years 893
Morgan Stanley Institutional Liquidity Funds - Participant Class Portfolios | MSILF Government Portfolio | Participant Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 66
Expense Example, with Redemption, 3 Years 219
Expense Example, with Redemption, 5 Years 385
Expense Example, with Redemption, 10 Years 866
Morgan Stanley Institutional Liquidity Funds - Participant Class Portfolios | MSILF Government Securities Portfolio | Participant Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 205
Expense Example, with Redemption, 5 Years 378
Expense Example, with Redemption, 10 Years 880
Morgan Stanley Institutional Liquidity Funds - Participant Class Portfolios | MSILF Treasury Portfolio | Participant Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 226
Expense Example, with Redemption, 5 Years 394
Expense Example, with Redemption, 10 Years 882
Morgan Stanley Institutional Liquidity Funds - Participant Class Portfolios | MSILF Treasury Securities Portfolio | Participant Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 226
Expense Example, with Redemption, 5 Years 394
Expense Example, with Redemption, 10 Years 882
Morgan Stanley Institutional Liquidity Funds - Cash Management Class Portfolios | MSILF Prime Portfolio | Cash Management Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 117
Expense Example, with Redemption, 5 Years 206
Expense Example, with Redemption, 10 Years 466
Morgan Stanley Institutional Liquidity Funds - Cash Management Class Portfolios | MSILF Government Portfolio | Cash Management Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 31
Expense Example, with Redemption, 3 Years 107
Expense Example, with Redemption, 5 Years 191
Expense Example, with Redemption, 10 Years 438
Morgan Stanley Institutional Liquidity Funds - Cash Management Class Portfolios | MSILF Government Securities Portfolio | Cash Management Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 119
Expense Example, with Redemption, 5 Years 210
Expense Example, with Redemption, 10 Years 477
Morgan Stanley Institutional Liquidity Funds - Cash Management Class Portfolios | MSILF Treasury Portfolio | Cash Management Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 115
Expense Example, with Redemption, 5 Years 201
Expense Example, with Redemption, 10 Years 455
Morgan Stanley Institutional Liquidity Funds - Cash Management Class Portfolios | MSILF Treasury Securities Portfolio | Cash Management Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 115
Expense Example, with Redemption, 5 Years 201
Expense Example, with Redemption, 10 Years 455
Morgan Stanley Institutional Liquidity Funds - Select Class Portfolios | MSILF Government Portfolio | Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 97
Expense Example, with Redemption, 3 Years 313
Expense Example, with Redemption, 5 Years 548
Expense Example, with Redemption, 10 Years 1,220
Morgan Stanley Institutional Liquidity Funds - Select Class Portfolios | MSILF Treasury Portfolio | Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 102
Expense Example, with Redemption, 3 Years 321
Expense Example, with Redemption, 5 Years 557
Expense Example, with Redemption, 10 Years 1,235
Morgan Stanley Institutional Liquidity Funds - Select Class Portfolios | MSILF Treasury Securities Portfolio | Select Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 102
Expense Example, with Redemption, 3 Years 321
Expense Example, with Redemption, 5 Years 557
Expense Example, with Redemption, 10 Years 1,235
Morgan Stanley Institutional Liquidity Funds - CastleOak Share Class | MSILF Prime Portfolio | CastleOak Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 69
Expense Example, with Redemption, 5 Years 122
Expense Example, with Redemption, 10 Years 278
Morgan Stanley Institutional Liquidity Funds - CastleOak Share Class | MSILF Government Portfolio | CastleOak Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 15
Expense Example, with Redemption, 3 Years 59
Expense Example, with Redemption, 5 Years 108
Expense Example, with Redemption, 10 Years 250
Morgan Stanley Institutional Liquidity Funds - Impact Class Portfolios | MSILF Prime Portfolio | Impact Share Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 69
Expense Example, with Redemption, 5 Years 122
Expense Example, with Redemption, 10 Years 278
Morgan Stanley Institutional Liquidity Funds - Impact Class Portfolios | MSILF Government Portfolio | Impact Share Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 15
Expense Example, with Redemption, 3 Years 59
Expense Example, with Redemption, 5 Years 108
Expense Example, with Redemption, 10 Years 250
Morgan Stanley Institutional Liquidity Funds - Impact Class Portfolios | MSILF Treasury Securities Portfolio | Impact Share Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 67
Expense Example, with Redemption, 5 Years 117
Expense Example, with Redemption, 10 Years 267
Morgan Stanley Institutional Liquidity Funds - Impact Partner Class Portfolios | MSILF Prime Portfolio | Impact Partner Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 69
Expense Example, with Redemption, 5 Years 122
Expense Example, with Redemption, 10 Years 278
Morgan Stanley Institutional Liquidity Funds - Impact Partner Class Portfolios | MSILF Government Portfolio | Impact Partner Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 15
Expense Example, with Redemption, 3 Years 59
Expense Example, with Redemption, 5 Years 108
Expense Example, with Redemption, 10 Years 250
Morgan Stanley Institutional Liquidity Funds - Impact Partner Class Portfolios | MSILF Treasury Securities Portfolio | Impact Partner Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 67
Expense Example, with Redemption, 5 Years 117
Expense Example, with Redemption, 10 Years 267
Morgan Stanley Institutional Liquidity Funds - Advisor Class Portfolios | MSILF Government Portfolio | Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 15
Expense Example, with Redemption, 3 Years 59
Expense Example, with Redemption, 5 Years 108
Expense Example, with Redemption, 10 Years 250
Morgan Stanley Institutional Liquidity Funds - Advisor Class Portfolios | MSILF Treasury Portfolio | Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 67
Expense Example, with Redemption, 5 Years 117
Expense Example, with Redemption, 10 Years 267
Morgan Stanley Institutional Liquidity Funds - Advisor Class Portfolios | MSILF Treasury Securities Portfolio | Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 67
Expense Example, with Redemption, 5 Years 117
Expense Example, with Redemption, 10 Years $ 267