Fees and Expenses - Morgan Stanley Institutional Liquidity Funds - MSILF Treasury Securities Portfolio |
Oct. 31, 2025 |
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| Prospectus [Line Items] | ||||||||||||||||||||
| Expense Heading [Optional Text] | Fees and Expenses | |||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the expenses that you may pay if you buy, hold and sell DAP Class shares of the Fund. The Fund does not charge any sales loads or other fees when you purchase or redeem shares. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries, which are not reflected in the tables and examples below.
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| Other Expenses, New Fund, Based on Estimates [Text] | Other Expenses have been estimated for the current fiscal year. | |||||||||||||||||||
| Operating Expenses Caption [Optional Text] | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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[1],[2] | ||||||||||||||||||
| Expense Example [Heading] | Example | |||||||||||||||||||
| Expense Example Narrative [Text Block] | The example below is intended to help you compare the cost of investing in the Fund’s DAP Class with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund’s DAP Class for the time periods indicated and then redeem all of your shares at the end of those periods, your investment has a 5% return each year and that the Fund’s operating expenses remain the same (except that the example incorporates the fee waiver and/or expense reimbursement arrangement for only the first year). Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, With Redemption [Table] |
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