Fees and Expenses - Morgan Stanley U.S. Government Money Market Trust - Classes R and S - U.S. Government Money Market Trust |
Jan. 31, 2026 |
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| Prospectus [Line Items] | |||||||||||||||||||||||||
| Expense Heading [Optional Text] | Fees and Expenses | ||||||||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. 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. The Fund is a no-load fund. The Fund does not impose any sales charges and does not charge account or exchange fees. The Fund offers two classes of shares: the R Class and the S Class. Each class has the same fees and expenses.
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| 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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| 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 with the cost of investing in other mutual funds. The example below assumes that you invest $10,000 in the Fund, your investment has a 5% return each year and the Fund’s operating expenses remain the same. 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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