Bar Chart and Performance Table [Heading]

Performance

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 (%)

Performance Table Narrative

After-tax performance is shown only for Class M shares. After-tax performance of the fund's Investor shares will vary. After-tax returns are calculated using the historical highest individual federal marginal 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.

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.

Year-by-Year Total Returns as of 12/31 each year (%)
Class M


	During the periods shown in the chart: Best Quarter 2020, Q2: 31.79 Worst Quarter 2020, Q1: (27.54)

The year-to-date total return of the fund's Class M shares as of September 30, 2025 was 10.76%.

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]

Average Annual Total Returns - BNY Mellon Small Cap Multi-Strategy Fund		12 Months Ended	60 Months Ended	120 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024
Russell 3000® Index reflects no deductions for fees, expenses or taxes \| Average Annual Return, Label [Optional Text]	Russell 3000® Index
Russell 3000® Index reflects no deductions for fees, expenses or taxes \| Average Annual Return, Percent		23.81%	13.86%	12.55%
Russell 2000® Index reflects no deductions for fees, expenses or taxes \| Average Annual Return, Label [Optional Text]	Russell 2000® Index
Russell 2000® Index reflects no deductions for fees, expenses or taxes \| Average Annual Return, Percent		11.54%	7.40%	7.82%
Class M \| Average Annual Return, Label [Optional Text]	returns before taxes
Class M \| Average Annual Return, Percent		8.93%	7.18%	7.93%
Class M \| After Taxes on Distributions \| Average Annual Return, Label [Optional Text]	returns after taxes on distributions
Class M \| After Taxes on Distributions \| Average Annual Return, Percent		6.49%	5.77%	6.35%
Class M \| After Taxes on Distributions and Sales \| Average Annual Return, Label [Optional Text]	returns after taxes on distributions and sale of fund shares
Class M \| After Taxes on Distributions and Sales \| Average Annual Return, Percent		7.16%	5.50%	6.06%
Investor \| Average Annual Return, Label [Optional Text]	returns before taxes
Investor \| Average Annual Return, Percent		8.68%	6.92%	7.67%

Index No Deduction for Fees, Expenses, or Taxes [Text]

reflects no deductions for fees, expenses or taxes

Prospectus [Line Items]

Bar Chart, Year to Date Return

10.76%

Highest Quarterly Return, Label [Optional Text]

Best Quarter

Highest Quarterly Return, Date

Jun. 30, 2020

Lowest Quarterly Return

(27.54%)

Bar Chart and Performance Table [Heading]

Performance

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.

Performance Additional Market Index [Text]

The table compares the average annual total returns of the fund's Class M shares and Investor shares to those of the MSCI EAFE® Index, a broad measure of market performance.

Bar Chart Closing [Text Block]

During the periods shown in the chart:
Best Quarter
2022, Q4: 19.82
Worst Quarter
2020, Q1: (24.00)

The year-to-date total return of the fund's Class M shares as of September 30, 2025 was 24.69%.

Performance Table Uses Highest Federal Rate

After-tax returns are calculated using the historical highest individual federal marginal tax rates, and do not reflect the impact of state and local taxes.

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.

Average Annual Return, Caption [Optional Text]

Average Annual Total Returns as of 12/31/24

Year to Date Return, Label [Optional Text]

The year-to-date total return of the fund's Class M shares as of

Bar Chart, Year to Date Return, Date

Sep. 30, 2025

Highest Quarterly Return

19.82%

Lowest Quarterly Return, Label [Optional Text]

Worst Quarter

Lowest Quarterly Return, Date

Mar. 31, 2020

Prospectus [Line Items]

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 the performance of the fund's Class M shares from year to year. The table compares the average annual total returns of the fund's Class M shares and Investor shares to those of the MSCI Emerging Markets Index, a broad measure of market performance.

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 (%)

Performance Table Narrative

After-tax performance is shown only for Class M shares. After-tax performance of the fund's Investor shares will vary. After-tax returns are calculated using the historical highest individual federal marginal 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.

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.

The fund changed its investment strategy on August 6, 2015. Prior to that date, the fund allocated its assets between a core investment style and a value investment style at the discretion of the fund's investment adviser. In addition, effective October 21, 2022, NIM became the fund's sub-adviser and the fund's investment approach, process and strategy were modified. Different investment strategies may lead to different performance results. The fund's performance for periods prior to August 6, 2015 and October 21, 2022 shown in the bar chart and table reflects the fund's investment strategy in effect prior to those dates.

Year-by-Year Total Returns as of 12/31 each year (%)
Class M


	During the periods shown in the chart: Best Quarter 2020, Q2: 20.19 Worst Quarter 2020, Q1: (26.73)

The year-to-date total return of the fund's Class M shares as of September 30, 2025 was 21.66%.

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.

Average Annual Return, Caption [Optional Text]

Average Annual Total Returns as of 12/31/24

Year to Date Return, Label [Optional Text]

The year-to-date total return of the fund's Class M shares as of

Bar Chart, Year to Date Return, Date

Sep. 30, 2025

Highest Quarterly Return

20.19%

Lowest Quarterly Return, Label [Optional Text]

Worst Quarter

Lowest Quarterly Return, Date

Mar. 31, 2020

Prospectus [Line Items]

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 the performance of the fund's Class M shares from year to year. The table compares the average annual total returns of the fund's Class M shares and Investor shares to those of the Bloomberg U.S. Aggregate Bond Index, a broad measure of market performance.

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 (%)

Performance Table Narrative

After-tax performance is shown only for Class M shares. After-tax performance of the fund's Investor shares will vary. After-tax returns are calculated using the historical highest individual federal marginal 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.

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.

Year-by-Year Total Returns as of 12/31 each year (%)
Class M


	During the periods shown in the chart: Best Quarter 2023, Q4: 6.65 Worst Quarter 2022, Q1: (6.17)

The year-to-date total return of the fund's Class M shares as of September 30, 2025 was 6.21%.

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]

Average Annual Total Returns - BNY Mellon Bond Fund		12 Months Ended	60 Months Ended	120 Months Ended
Average Annual Total Returns - BNY Mellon Bond Fund	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024
Bloomberg U.S. Aggregate Bond Index reflects no deductions for fees, expenses or taxes \| Average Annual Return, Label [Optional Text]	Bloomberg U.S. Aggregate Bond Index
Bloomberg U.S. Aggregate Bond Index reflects no deductions for fees, expenses or taxes \| Average Annual Return, Percent		1.25%	(0.33%)	1.35%
Class M \| Average Annual Return, Label [Optional Text]	returns before taxes
Class M \| Average Annual Return, Percent		1.08%	(0.42%)	1.29%
Class M \| After Taxes on Distributions \| Average Annual Return, Label [Optional Text]	returns after taxes on distributions
Class M \| After Taxes on Distributions \| Average Annual Return, Percent		(0.41%)	(1.70%)	0.03%
Class M \| After Taxes on Distributions and Sales \| Average Annual Return, Label [Optional Text]	returns after taxes on distributions and sale of fund shares
Class M \| After Taxes on Distributions and Sales \| Average Annual Return, Percent		0.64%	(0.80%)	0.47%
Investor \| Average Annual Return, Label [Optional Text]	returns before taxes
Investor \| Average Annual Return, Percent		0.75%	(0.67%)	1.03%

Index No Deduction for Fees, Expenses, or Taxes [Text]

reflects no deductions for fees, expenses or taxes

Prospectus [Line Items]

Bar Chart, Year to Date Return

6.21%

Highest Quarterly Return, Label [Optional Text]

Best Quarter

Highest Quarterly Return, Date

Dec. 31, 2023

Lowest Quarterly Return

(6.17%)

Bar Chart and Performance Table [Heading]

Performance

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 (%)

Performance Table Narrative

After-tax performance is shown only for Class M shares. After-tax performance of the fund's Investor shares will vary. After-tax returns are calculated using the historical highest individual federal marginal 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.

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.

Year-by-Year Total Returns as of 12/31 each year (%)
Class M


	During the periods shown in the chart: Best Quarter 2023, Q4: 6.37 Worst Quarter 2022, Q1: (5.58)

The year-to-date total return of the fund's Class M shares as of September 30, 2025 was 3.11%.

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]

Average Annual Total Returns - BNY Mellon Massachusetts Intermediate Municipal Bond Fund			12 Months Ended	60 Months Ended	120 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024
Bloomberg US Municipal Bond Index* (reflects no deductions for fees, expenses or taxes) \| Average Annual Return, Label [Optional Text]	^[1]	Bloomberg US Municipal Bond Index*
Bloomberg US Municipal Bond Index* (reflects no deductions for fees, expenses or taxes) \| Average Annual Return, Percent	^[1]		1.05%	0.99%	2.25%
S&P Municipal Bond Index† reflects no deductions for fees, expenses or taxes \| Average Annual Return, Label [Optional Text]	^[2]	S&P Municipal Bond Index†
S&P Municipal Bond Index† reflects no deductions for fees, expenses or taxes \| Average Annual Return, Percent	^[2]		1.90%	1.20%	2.34%
Bloomberg Muni 3-15 Years Blend Index* (reflects no deductions for fees, expenses or taxes) \| Average Annual Return, Label [Optional Text]	^[1]	Bloomberg Muni 3-15 Years Blend Index*
Bloomberg Muni 3-15 Years Blend Index* (reflects no deductions for fees, expenses or taxes) \| Average Annual Return, Percent	^[1]		0.48%	1.02%	2.13%
S&P Municipal Bond Investment Grade Intermediate Index† reflects no deductions for fees, expenses or taxes \| Average Annual Return, Label [Optional Text]	^[2]	S&P Municipal Bond Investment Grade Intermediate Index†
S&P Municipal Bond Investment Grade Intermediate Index† reflects no deductions for fees, expenses or taxes \| Average Annual Return, Percent	^[2]		0.89%	1.03%	2.13%
Class M \| Average Annual Return, Label [Optional Text]		returns before taxes
Class M \| Average Annual Return, Percent			1.08%	0.91%	1.82%
Class M \| After Taxes on Distributions \| Average Annual Return, Label [Optional Text]		returns after taxes on distributions
Class M \| After Taxes on Distributions \| Average Annual Return, Percent			1.08%	0.91%	1.79%
Class M \| After Taxes on Distributions and Sales \| Average Annual Return, Label [Optional Text]		returns after taxes on distributions and sale of fund shares
Class M \| After Taxes on Distributions and Sales \| Average Annual Return, Percent			1.61%	1.19%	1.92%
Investor \| Average Annual Return, Label [Optional Text]		returns before taxes
Investor \| Average Annual Return, Percent			0.82%	0.66%	1.55%

[1]	Unlike the fund, the index is not limited to obligations issued by a single state or municipalities in that state.
[2]	Effective as of February 2, 2026, the Bloomberg indices are the fund's benchmarks. Performance of the S&P indices will not be shown in the future.

Index No Deduction for Fees, Expenses, or Taxes [Text]

reflects no deductions for fees, expenses or taxes

^[1]

Prospectus [Line Items]

Bar Chart, Year to Date Return

3.11%

Highest Quarterly Return, Label [Optional Text]

Best Quarter

Highest Quarterly Return, Date

Dec. 31, 2023

Lowest Quarterly Return

(5.58%)

Bar Chart and Performance Table [Heading]

Performance

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 (%)

Performance Table Narrative

After-tax performance is shown only for Class M shares. After-tax performance of the fund's Investor shares will vary. After-tax returns are calculated using the historical highest individual federal marginal 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.

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.

Year-by-Year Total Returns as of 12/31 each year (%)
Class M


	During the periods shown in the chart: Best Quarter 2020, Q2: 15.93 Worst Quarter 2020, Q1: (16.45)

The year-to-date total return of the fund's Class M shares as of September 30, 2025 was 12.47%.

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.

Average Annual Return, Caption [Optional Text]

Average Annual Total Returns as of 12/31/24

Year to Date Return, Label [Optional Text]

The year-to-date total return of the fund's Class M shares as of

Bar Chart, Year to Date Return, Date

Sep. 30, 2025

Highest Quarterly Return

15.93%

Lowest Quarterly Return, Label [Optional Text]

Worst Quarter

Lowest Quarterly Return, Date

Mar. 31, 2020