Performance Management - BNY Mellon Short Term Municipal Bond Fund |
Mar. 31, 2025 |
|---|---|
| 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 Class D shares from year to year. The table compares the average annual total returns of the fund's shares to those of the Bloomberg U.S. Municipal Bond Index, a broad measure of market performance, and the Bloomberg Municipal Bond 1-3 Year Blend Index. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Performance for each share class will vary due to differences in expenses. More recent performance information may be available at www.bny.com/investments. |
| Performance Past Does Not Indicate Future [Text] | The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. |
| 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: The year-to-date total return of the fund's Class D shares as of June 30, 2025 was 1.83%. |
| Performance Table Narrative | After-tax performance is shown only for Class D shares. After-tax performance of the fund's other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through U.S. tax-deferred arrangements such as 401(k) plans or individual retirement accounts. Returns after taxes on distributions and sale of fund shares may be higher than returns before taxes or returns after taxes on distributions due to an assumed tax benefit from losses on a sale of the fund's shares at the end of the period. |
| Performance Table Uses Highest Federal Rate | After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. |
| Performance Table Not Relevant to Tax Deferred | Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through U.S. tax-deferred arrangements such as 401(k) plans or individual retirement accounts. |
| Performance Table Explanation after Tax Higher | Returns after taxes on distributions and sale of fund shares may be higher than returns before taxes or returns after taxes on distributions due to an assumed tax benefit from losses on a sale of the fund's shares at the end of the period. |
| Performance [Table] | |
| Average Annual Return, Caption [Optional Text] | Average Annual Total Returns (as of 12/31/24) |
| Performance Table One Class of after Tax Shown [Text] | After-tax performance is shown only for Class D shares. After-tax performance of the fund's other share classes will vary. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | reflects no deductions for fees, expenses or taxes |
| Performance Availability Website Address [Text] | www.bny.com/investments |
| D | |
| Prospectus [Line Items] | |
| Year to Date Return, Label [Optional Text] | The year-to-date total return of the fund's Class D shares as of |
| Bar Chart, Year to Date Return | 1.83% |
| Bar Chart, Year to Date Return, Date | Jun. 30, 2025 |
| Highest Quarterly Return, Label [Optional Text] | Best Quarter |
| Highest Quarterly Return | 2.86% |
| Highest Quarterly Return, Date | Dec. 31, 2023 |
| Lowest Quarterly Return, Label [Optional Text] | Worst Quarter |
| Lowest Quarterly Return | (3.45%) |
| Lowest Quarterly Return, Date | Mar. 31, 2022 |