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BNY Mellon Natural Resources Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund Summary
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The fund seeks long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or shares of other funds in the BNY Mellon Family of Funds that are subject to a sales charge. More information about sales charges, including these and other discounts and waivers, is available from your financial professional and in the Shareholder Guide section beginning on page 11 of the prospectus, in the Appendix on page A-1 of the prospectus and in the How to Buy Shares section and the Additional Information About How to Buy Shares section beginning on page II-1 and page III-1, respectively, of the fund's Statement of Additional Information.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held

in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 103.94% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 103.94%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or shares of other funds in the BNY Mellon Family of Funds that are subject to a sales charge.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated. The Example also assumes that your investment has a 5% return each year and that 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:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategy
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in stocks of companies in the natural resources and natural resources related sectors. Generally, these are companies principally engaged in owning or developing natural resources, or supplying goods, technology and services relating to natural resources. The fund invests in growth and value stocks and typically will maintain exposure to the major natural resources sectors. Using fundamental research and direct management contact, the fund's sub-adviser, Newton Investment Management North America, LLC, an affiliate of BNY Mellon Investment Adviser, Inc., seeks stocks of companies with strong positions in their natural resources sector, sustained achievement records and strong financial condition. Although the fund has no limits on the weightings of securities in any particular natural resources sector or in any individual company, the fund's sub-adviser typically does not intend to invest more than 5% of the fund's net assets in any individual company. The fund may invest in companies of any market capitalization. The fund may invest in foreign securities, including emerging markets securities, without limitation.

The fund typically sells a stock when, in the sub-adviser's view, the reasons for buying it no longer apply or when the company begins to show deteriorating fundamentals or poor relative performance or when a stock is fully valued by the market. The fund may also sell a stock to secure gains, limit losses or redeploy assets into more promising opportunities.
Risk [Heading] rr_RiskHeading Principal Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

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 A shares from year to year. Sales charges, if any, are not reflected in the bar chart, and, if those charges were included, returns would have been less than those shown. The table compares the average annual total returns of the fund's shares to those of the S&P 500® Index, a broad measure of market performance, and the S&P Global Natural Resources 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 Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.bny.com/investments
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture 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] rr_BarChartHeading Year-by-Year Total Returns as of 12/31 each year (%)
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Sales charges, if any, are not reflected in the bar chart, and, if those charges were included, returns would have been less than those shown.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

During the periods shown in the chart:
Best Quarter
2022, Q1: 34.53
Worst Quarter
2020, Q1: (36.04)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate 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 rr_PerformanceTableNotRelevantToTaxDeferred 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 One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax performance is shown only for Class A shares. After-tax performance of the fund's other share classes will vary.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher 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 a period.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

After-tax performance is shown only for Class A 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 a period.

For the fund's Class Y shares, periods prior to the inception date reflect the performance of the fund's Class I shares. Such performance figures have not been adjusted to reflect applicable class expenses of Class Y shares. Each share class is invested in the same portfolio of securities, and the annual returns would have differed only to the extent that the classes have different expenses.
Average Annual Return, Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (as of 12/31/24)
BNY Mellon Natural Resources Fund | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock The fund's share price fluctuates, sometimes dramatically, which means you could lose money.
BNY Mellon Natural Resources Fund | Risk Not Insured [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.
BNY Mellon Natural Resources Fund | · Natural resources sector risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Natural resources sector risk: Investments in the natural resources and related sectors may be affected by numerous factors, including events occurring in nature, inflationary pressures and domestic and international politics. For example, events occurring in nature (such as earthquakes or fires in prime natural resource areas) and political events (such as coups or military confrontations) can affect the overall supply of a natural resource and the value of companies involved in such natural resource. Political risks and other risks to which foreign securities are subject also may affect domestic companies in which the fund invests if they have significant operations or investments in foreign countries. In addition, interest rates, prices of raw materials and other commodities, international economic developments, energy conservation, tax and other government regulations (both domestic and foreign) may affect the supply of and demand for natural resources, which can affect the profitability and value of securities issued by companies in the natural resources sectors.

Securities of companies within specific natural resources sectors can perform differently than the overall market. This may be due to changes in such things as the regulatory or competitive environment or to changes in investor perceptions regarding a sector. Because the fund may allocate relatively more assets to certain natural resources sectors than others, the fund's performance may be more sensitive to developments which affect those sectors emphasized by the fund.
BNY Mellon Natural Resources Fund | · Risks of stock investing  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Risks of stock investing: Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general market conditions or because of factors that affect the particular company or the company's industry.
BNY Mellon Natural Resources Fund | · Growth and value stock risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Growth and value stock risk: By investing in a mix of growth and value companies, the fund assumes the risks of both. Investors often expect growth companies to increase their earnings at a certain rate. If these expectations are not met, investors can punish the stocks inordinately, even if earnings do increase. Value stocks involve the risk that they may never reach their expected full market value, either because the market fails to recognize the stock's intrinsic worth or the expected value was misgauged.

BNY Mellon Natural Resources Fund | · Foreign investment risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Foreign investment risk: To the extent the fund invests in foreign securities, the fund's performance will be influenced by political, social and economic factors affecting investments in foreign issuers. Special risks associated with investments in foreign issuers include exposure to currency fluctuations, less liquidity, less developed or less efficient trading markets, lack of comprehensive company information, political and economic instability and differing auditing and legal standards.

BNY Mellon Natural Resources Fund | · Emerging market risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Emerging market risk: The securities of issuers located or doing substantial business in emerging market countries tend to be more volatile and less liquid than the securities of issuers located in countries with more mature economies. Emerging markets generally have less diverse and less mature economic structures and less stable political systems than those of developed countries. Investments in these countries may be subject to political, economic, legal, market and currency risks. Special risks associated with investments in emerging market issuers may include a lack of publicly available information, a lack of uniform disclosure, accounting and financial reporting and recordkeeping standards and limited investor protections applicable in developed economies. The risks also may include unpredictable political and economic policies, the imposition of capital controls and/or foreign investment limitations by a country, nationalization of businesses and the imposition of sanctions or restrictions on certain investments by other countries, such as the United States.

BNY Mellon Natural Resources Fund | · Small and midsize company risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Small and midsize company risk: Small and midsize companies carry additional risks because the operating histories of these companies tend to be more limited, their earnings and revenues less predictable (and some companies may be experiencing significant losses), and their share prices more volatile than those of larger, more established companies. The shares of smaller companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the fund's ability to sell these securities.
BNY Mellon Natural Resources Fund | · Liquidity risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Liquidity risk: When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities in a timely manner at or near their perceived value. In such a market, the value of such securities and the fund's share price may fall dramatically. Investments that are illiquid or that trade in lower volumes may be more difficult to value. Investments in foreign securities, particularly those of issuers located in emerging markets, tend to have greater exposure to liquidity risk than domestic securities.

BNY Mellon Natural Resources Fund | · Market risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Market risk: The value of the securities in which the fund invests may be affected by political, regulatory, economic and social developments, and developments that impact specific economic sectors, industries or segments of the market.  In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed-income markets may negatively affect many issuers, which could adversely affect the fund.  Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.  These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies world-wide. 

BNY Mellon Natural Resources Fund | · Management risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

· Management risk: The investment process used by the fund's sub-adviser could fail to achieve the fund's investment goal and cause your fund investment to lose value.

BNY Mellon Natural Resources Fund | S&P 1500 Index*  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 23.95% [1]
5 Years rr_AverageAnnualReturnYear05 14.13% [1]
10 Years rr_AverageAnnualReturnYear10 12.79% [1]
BNY Mellon Natural Resources Fund | S&P Global Natural Resources Indexreflects no deductions for fees, expenses or taxes  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deductions for fees, expenses or taxes [1]
1 Year rr_AverageAnnualReturnYear01 (8.30%) [1]
5 Years rr_AverageAnnualReturnYear05 5.83% [1]
10 Years rr_AverageAnnualReturnYear10 5.31% [1]
BNY Mellon Natural Resources Fund | A  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol DNLAX
Maximum sales charge (load) imposed on purchases(as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [2]
Management fees rr_ManagementFeesOverAssets 0.75%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder services fees rr_Component2OtherExpensesOverAssets 0.25%
Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.16%
Total other expenses rr_OtherExpensesOverAssets 0.41%
Total annual fund operating expenses rr_ExpensesOverAssets 1.16%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year.
1 Year rr_ExpenseExampleYear01 $ 686
3 Years rr_ExpenseExampleYear03 922
5 Years rr_ExpenseExampleYear05 1,177
10 Years rr_ExpenseExampleYear10 1,903
1 Year rr_ExpenseExampleNoRedemptionYear01 686
3 Years rr_ExpenseExampleNoRedemptionYear03 922
5 Years rr_ExpenseExampleNoRedemptionYear05 1,177
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,903
Annual Return 2015 rr_AnnualReturn2015 (22.89%)
Annual Return 2016 rr_AnnualReturn2016 27.75%
Annual Return 2017 rr_AnnualReturn2017 13.69%
Annual Return 2018 rr_AnnualReturn2018 (17.81%)
Annual Return 2019 rr_AnnualReturn2019 16.36%
Annual Return 2020 rr_AnnualReturn2020 6.28%
Annual Return 2021 rr_AnnualReturn2021 38.16%
Annual Return 2022 rr_AnnualReturn2022 34.25%
Annual Return 2023 rr_AnnualReturn2023 1.56%
Annual Return 2024 rr_AnnualReturn2024 0.70%
Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2022
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 34.53%
Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (36.04%)
Label rr_AverageAnnualReturnLabel returns before taxes [1]
1 Year rr_AverageAnnualReturnYear01 (5.09%) [1]
5 Years rr_AverageAnnualReturnYear05 13.70% [1]
10 Years rr_AverageAnnualReturnYear10 7.37% [1]
BNY Mellon Natural Resources Fund | A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel returns after taxes on distributions [1]
1 Year rr_AverageAnnualReturnYear01 (6.69%) [1]
5 Years rr_AverageAnnualReturnYear05 11.86% [1]
10 Years rr_AverageAnnualReturnYear10 6.34% [1]
BNY Mellon Natural Resources Fund | A | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel returns after taxes on distributions and sale of fund shares [1]
1 Year rr_AverageAnnualReturnYear01 (1.94%) [1]
5 Years rr_AverageAnnualReturnYear05 10.86% [1]
10 Years rr_AverageAnnualReturnYear10 5.84% [1]
BNY Mellon Natural Resources Fund | C  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol DLDCX
Maximum sales charge (load) imposed on purchases(as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Management fees rr_ManagementFeesOverAssets 0.75%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Shareholder services fees rr_Component2OtherExpensesOverAssets 0.25%
Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.12%
Total other expenses rr_OtherExpensesOverAssets 0.37%
Total annual fund operating expenses rr_ExpensesOverAssets 1.87%
1 Year rr_ExpenseExampleYear01 $ 290
3 Years rr_ExpenseExampleYear03 588
5 Years rr_ExpenseExampleYear05 1,011
10 Years rr_ExpenseExampleYear10 2,190
1 Year rr_ExpenseExampleNoRedemptionYear01 190
3 Years rr_ExpenseExampleNoRedemptionYear03 588
5 Years rr_ExpenseExampleNoRedemptionYear05 1,011
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,190
Label rr_AverageAnnualReturnLabel returns before taxes [1]
1 Year rr_AverageAnnualReturnYear01 (0.95%) [1]
5 Years rr_AverageAnnualReturnYear05 14.23% [1]
10 Years rr_AverageAnnualReturnYear10 7.23% [1]
BNY Mellon Natural Resources Fund | I  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol DLDRX
Maximum sales charge (load) imposed on purchases(as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.75%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder services fees rr_Component2OtherExpensesOverAssets none
Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.14%
Total other expenses rr_OtherExpensesOverAssets 0.14%
Total annual fund operating expenses rr_ExpensesOverAssets 0.89%
1 Year rr_ExpenseExampleYear01 $ 91
3 Years rr_ExpenseExampleYear03 284
5 Years rr_ExpenseExampleYear05 493
10 Years rr_ExpenseExampleYear10 1,096
1 Year rr_ExpenseExampleNoRedemptionYear01 91
3 Years rr_ExpenseExampleNoRedemptionYear03 284
5 Years rr_ExpenseExampleNoRedemptionYear05 493
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,096
Label rr_AverageAnnualReturnLabel returns before taxes [1]
1 Year rr_AverageAnnualReturnYear01 0.94% [1]
5 Years rr_AverageAnnualReturnYear05 15.34% [1]
10 Years rr_AverageAnnualReturnYear10 8.28% [1]
BNY Mellon Natural Resources Fund | Y  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol DLDYX
Maximum sales charge (load) imposed on purchases(as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management fees rr_ManagementFeesOverAssets 0.75%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Shareholder services fees rr_Component2OtherExpensesOverAssets none
Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.05%
Total other expenses rr_OtherExpensesOverAssets 0.05%
Total annual fund operating expenses rr_ExpensesOverAssets 0.80%
1 Year rr_ExpenseExampleYear01 $ 82
3 Years rr_ExpenseExampleYear03 255
5 Years rr_ExpenseExampleYear05 444
10 Years rr_ExpenseExampleYear10 990
1 Year rr_ExpenseExampleNoRedemptionYear01 82
3 Years rr_ExpenseExampleNoRedemptionYear03 255
5 Years rr_ExpenseExampleNoRedemptionYear05 444
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 990
Label rr_AverageAnnualReturnLabel returns before taxes [1]
1 Year rr_AverageAnnualReturnYear01 1.06% [1]
5 Years rr_AverageAnnualReturnYear05 15.46% [1]
10 Years rr_AverageAnnualReturnYear10 8.39% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2015 [1]
[1] In accordance with regulatory changes requiring the Fund's primary benchmark to represent the overall applicable market, the Fund's primary prospectus benchmark changed to the indicated benchmark effective as of September 30, 2024.
[2] Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year.