Performance Management - Dreyfus Treasury and Agency Liquidity Money Market Fund |
Nov. 30, 2025 |
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| Prospectus [Line Items] | ||||||||||||||||
| Bar Chart and Performance Table [Heading] | Performance | |||||||||||||||
| Performance Narrative [Text Block] | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's shares from year to year. The table shows the average annual total returns of the fund's shares over time. The fund's past performance is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com. |
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| Performance Past Does Not Indicate Future [Text] | The fund's past performance is not necessarily an indication of how the fund will perform in the future. | |||||||||||||||
| Performance Information Illustrates Variability of Returns [Text] | The following bar chart and table provide some indication of the risks of investing in the fund. | |||||||||||||||
| Bar Chart [Heading] | Year-by-Year Total Returns as of 12/31 each year (%) | |||||||||||||||
| Bar Chart Closing [Text Block] | During the periods shown in the chart: |
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| Performance [Table] |
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| Average Annual Return, Caption [Optional Text] | Average Annual Total Returns (as of 12/31/25) | |||||||||||||||
| Performance Table Closing [Text Block] | Institutions may call toll-free 1-800-373-9387 (inside the U.S. only) for the current yield of the fund's shares. | |||||||||||||||
| Money Market Seven Day Yield Phone | 1-800-373-9387 | |||||||||||||||
| Performance Availability Website Address [Text] | www.dreyfus.com | |||||||||||||||
| Single Share | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Highest Quarterly Return, Label [Optional Text] | Best Quarter | |||||||||||||||
| Highest Quarterly Return | 1.34% | |||||||||||||||
| Highest Quarterly Return, Date | Dec. 31, 2023 | |||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | Worst Quarter | |||||||||||||||
| Lowest Quarterly Return | none | |||||||||||||||
| Lowest Quarterly Return, Date | Dec. 31, 2021 |