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BNY Mellon Global Real Return 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 total return (consisting of capital appreciation and income).
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 and hold shares of the fund. 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 18 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)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Feb. 28, 2021
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 99.45% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 99.45%
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
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Acquired fund fees and expenses are incurred indirectly by the fund as a result of its investments in other investment companies (underlying funds). These fees and expenses are not included in the Financial Highlights tables; accordingly, total annual fund operating expenses do not correlate to the ratio of total expenses to average net assets in the Financial Highlights tables.
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 and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense limitation agreement by BNY Mellon Investment Adviser, Inc. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption You would pay the following expenses if you did not redeem your shares:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategy
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

To pursue its goal, the fund uses an actively-managed multi-asset strategy to produce absolute or real returns with less volatility than major equity markets over a complete market cycle, typically a period of five years. The fund is not managed to a benchmark index. Rather than managing to track a benchmark index, the fund seeks to provide returns that are largely independent of market moves.


The fund allocates its investments among global equities, bonds and cash, and, generally to a lesser extent, other asset classes, including real estate, commodities, currencies and alternative or non-traditional asset classes and strategies, primarily those accessed through derivative instruments. The fund may invest in, or otherwise have investment exposure to, the securities of companies of any market capitalization. The fund obtains investment exposure to these asset classes by investing in securities and through derivative instruments.


The fund's portfolio managers combine a top-down approach, emphasizing economic trends and current investment themes on a global basis, with bottom-up security selection based on fundamental research to allocate the fund's investments among and within asset classes. In choosing investments, the portfolio managers consider: key trends in global economic variables, such as gross domestic product, inflation and interest rates; investment themes, such as changing demographics, the impact of new technologies and the globalization of industries and brands; relative valuations of equity securities, bonds and cash; long-term trends in currency movements; and company fundamentals. Within markets and sectors determined to be attractive in absolute terms, the fund's portfolio managers seek what they believe to be attractively priced companies that possess a sustainable competitive advantage in their market or sector and invest in such companies across their capital structures. The portfolio managers generally will sell investments when themes change or when the portfolio managers determine that a particular market or sector is no longer considered attractive in absolute terms, a company's prospects have changed or the investment is fully valued by the market.


The fund's investments will be focused globally among the developed and emerging capital markets of the world. Under normal market conditions, the fund will invest a substantial portion of its assets in the securities of issuers organized or located outside the United States, whose primary listing exchange for securities is located outside the United States, whose largest amount of revenues are derived from countries outside the United States or whose reporting currencies are other than U.S. dollars, and derivatives which provide exposure to such issuers or foreign markets. The portfolio managers have considerable latitude in allocating the fund's investments and in selecting securities and derivative instruments to implement the fund's investment approach, although the fund must invest at least 10% of the value of its total assets in equity securities and at least 10% of the value of its total assets in fixed-income securities. Subject to such requirements, the fund is not otherwise limited in its ability to use derivative instruments. The fund may invest in bonds and other fixed-income securities of any maturity or duration. A bond's maturity is the length of time until the principal must be fully repaid with interest. Average effective portfolio maturity is an average of the maturities of bonds held by the fund directly and the bonds underlying derivative instruments entered into by the fund, if any, adjusted to reflect provisions or market conditions that may cause a bond's principal to be repaid earlier than at its stated maturity. Duration is an indication of an investment's "interest rate risk," or how sensitive a bond or the fund's portfolio may be to changes in interest rates.


The fund may use to a significant degree derivative instruments as a substitute for investing directly in equities, bonds, currencies and other asset classes in connection with its investment strategy. The fund also may use such derivatives as part of a hedging strategy or for other purposes related to the management of the fund. The derivative instruments in which the fund may invest include principally options, futures and options on futures (including those relating to securities, indices, foreign currencies and interest rates), forward contracts, swap agreements and structured notes. When the fund enters into derivatives transactions, it may be required to segregate liquid assets or enter into offsetting positions, in accordance with applicable regulations.


The fund also may gain investment exposure to global commodity markets through investments in a wholly-owned and controlled subsidiary of the fund that principally invests directly in commodity-related instruments, including futures and options contracts, swap agreements and pooled investment vehicles that invest in commodities. The subsidiary has the same investment objective, investment adviser and sub-investment adviser as the fund.


The fund's portfolio will not have the same characteristics as its designated performance baseline benchmark — USD 1-Month LIBOR — or its designated broad-based securities market index — the FTSE One-Month U.S. Treasury Bill Index. Although the fund is not managed to a benchmark index, the fund seeks to provide a minimum average annual total return of USD 1-Month LIBOR plus 4%, before fees and expenses, over a five-year period. There can be no assurance the fund will be able to provide such returns and you may lose money by investing in the fund.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

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. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.


· Allocation risk. The ability of the fund to achieve its investment goal depends, in part, on the ability of the fund's portfolio managers to allocate effectively the fund's assets among the global equities, bonds and cash, and other asset classes. There can be no assurance that the actual allocations will be effective in achieving the fund's investment goal.


· Correlation risk. Although the prices of equity securities and fixed-income securities often rise and fall at different times so that a fall in the price of one may be offset by a rise in the price of the other, in down markets the prices of these securities can also fall in tandem.


· 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.


· 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. Investments denominated in foreign currencies are subject to the risk that such currencies will decline in value relative to the U.S. dollar and affect the value of these investments held by the fund. To the extent the fund's investments are focused in a limited number of foreign countries, the fund's performance could be more volatile than that of more geographically diversified funds.


· 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. The risks may include less protection of property rights and uncertain 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 by other countries, such as the United States.


· Foreign currency risk. Investments in foreign currencies are subject to the risk that those currencies will decline in value relative to the U.S. dollar or, in the case of hedged positions, that the U.S. dollar will decline relative to the currency being hedged. Foreign currencies, particularly the currencies of emerging market countries, are also subject to risks caused by inflation, interest rates, budget deficits and low savings rates, political factors and government intervention and controls.


· Market capitalization risk (small-, mid- and large-cap stock risk). To the extent the fund emphasizes small-, mid- or large-cap stocks, it will assume the associated risks. At any given time, any of these market capitalizations may be out of favor with investors. Compared to small- and mid-cap companies, large-cap companies may be less responsive to changes and opportunities affecting their business. To the extent the fund invests in small- and mid-cap companies, it will be subject to 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. Smaller companies may have limited product lines, markets or financial resources, or may depend on a limited management group.


· Commodity sector risk. Exposure to the commodities markets may subject the fund to greater volatility than investments in traditional securities. The values of commodities and commodity-linked investments are affected by events that might have less impact on the values of stocks and bonds. Investments linked to the prices of commodities are considered speculative. Because the value of a commodity-linked derivative instrument, such as a structured note, typically is based upon the price movements of physical commodities, the value of these securities will rise or fall in response to changes in the underlying commodities or related index of investment. Prices of commodities and commodity-linked investments may fluctuate significantly over short periods for a variety of factors, including: changes in supply and demand relationships, weather, agriculture, trade, fiscal, monetary and exchange control programs, disease, pestilence, acts of terrorism, embargoes, tariffs and international economic, political, military and regulatory developments.


· Subsidiary risk. To the extent the fund invests in the subsidiary, the fund will be indirectly exposed to the risks associated with the subsidiary's investments. The subsidiary principally invests in commodity-related instruments, including futures and options contracts, swap agreements and pooled investment vehicles that invest in commodities, and the fund's investment in the subsidiary is subject to the same risks that apply to similar investments if held directly by the fund. Changes in applicable laws governing the subsidiary could prevent the fund or the subsidiary from operating as described in the prospectus and could negatively affect the fund and its shareholders. There also may be federal income tax risks associated with the fund's investment in the subsidiary.


· Real estate sector risk. The securities of issuers that are principally engaged in the real estate sector may be subject to risks similar to those associated with the direct ownership of real estate. These include: declines in real estate values; defaults by mortgagors or other borrowers and tenants; increases in property taxes and operating expenses; overbuilding; fluctuations in rental income; changes in interest rates; possible lack of availability of mortgage funds or financing; extended vacancies of properties; changes in tax and regulatory requirements (including zoning laws and environmental restrictions); losses due to costs resulting from the clean-up of environmental problems; liability to third parties for damages resulting from environmental problems; and casualty or condemnation losses. In addition, the performance of the economy in each of the regions and countries in which the real estate owned by a portfolio company is located affects occupancy, market rental rates and expenses and, consequently, has an impact on the income from such properties and their underlying values.


· Derivatives risk. A small investment in derivatives could have a potentially large impact on the fund's performance. The use of derivatives involves risks different from, or possibly greater than, the risks associated with investing directly in the underlying assets, and the fund's use of derivatives may result in losses to the fund. Derivatives in which the fund may invest can be highly volatile, illiquid and difficult to value, and there is the risk that changes in the value of a derivative held by the fund will not correlate with the underlying assets or the fund's other investments in the manner intended. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment, and involve greater risks than the underlying assets because, in addition to general market risks, they are subject to liquidity risk, credit and counterparty risk (failure of the counterparty to the derivatives transaction to honor its obligation) and pricing risk (risk that the derivative cannot or will not be accurately valued). Future rules and regulations of the Securities and Exchange Commission (SEC) may require the fund to alter, perhaps materially, its use of derivatives.


· Leverage risk. The use of leverage, such as entering into futures contracts or forward currency contracts and engaging in forward commitment transactions, may magnify the fund's gains or losses. Because many derivatives have a leverage component, adverse changes in the value or level of the underlying asset or reference rate can result in a loss substantially greater than the amount invested in the derivative itself.


· Fixed-income market risk. The market value of a fixed-income security may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. The fixed-income securities market can be susceptible to increases in volatility and decreases in liquidity. Liquidity can decline unpredictably in response to overall economic conditions or credit tightening. Increases in volatility and decreases in liquidity may be caused by a rise in interest rates (or the expectation of a rise in interest rates). An unexpected increase in fund redemption requests, including requests from shareholders who may own a significant percentage of the fund's shares, which may be triggered by market turmoil or an increase in interest rates, could cause the fund to sell its holdings at a loss or at undesirable prices and adversely affect the fund's share price and increase the fund's liquidity risk, fund expenses and/or taxable distributions.


· Interest rate risk. Prices of bonds and other fixed rate fixed-income securities tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect fixed-income securities and, accordingly, will cause the value of the fund's investments in these securities to decline. During periods of very low interest rates, which occur from time to time due to market forces or actions of governments and/or their central banks, including the Board of Governors of the Federal Reserve System in the U.S., the fund may be subject to a greater risk of principal decline from rising interest rates. When interest rates fall, the fund's investments in new securities may be at lower yields and may reduce the fund's income. The magnitude of these fluctuations in the market price of fixed-income securities is generally greater for securities with longer effective maturities and durations because such instruments do not mature, reset interest rates or become callable for longer periods of time.


· Credit risk. Failure of an issuer of a security to make timely interest or principal payments when due, or a decline or perception of a decline in the credit quality of the security, can cause the security's price to fall. The lower a security's credit rating, the greater the chance that the issuer of the security will default or fail to meet its payment obligations.


· 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.


· Issuer risk. A security's market value may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer's products or services, or factors that affect the issuer's industry, such as labor shortages or increased production costs and competitive conditions within an industry.


· Tax risk. As a regulated investment company ("RIC"), the fund must derive at least 90% of its gross income for each taxable year from sources treated as "qualifying income" under the Internal Revenue Code. The fund intends to achieve investment exposure to global commodity markets primarily by investing in the subsidiary and commodity-linked derivative instruments. The tax treatment of the fund's investments in the subsidiary and commodity-linked derivative instruments could affect whether income derived from such investments is "qualifying income" under the Internal Revenue Code, or otherwise affect the character, timing and/or amount of the fund's taxable income or any gains and distributions made by the fund. The Internal Revenue Service has recently adopted regulations that generally treat a fund's inclusion of income with respect to a subsidiary as "qualifying income" if there is a distribution out of the earnings and profits of the subsidiary that are attributable to such income inclusion. If the Internal Revenue Service were able to successfully assert that the fund's income from such investments was not "qualifying income," the fund would fail to qualify as a RIC if over 10% of its gross income was derived from these investments. The fund's failure to qualify as a RIC would significantly adversely affect the returns to, and could cause losses for, fund shareholders.
Risk Lose Money [Text] rr_RiskLoseMoney The fund's share price fluctuates, sometimes dramatically, which means you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution 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.
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 USD 1-Month LIBOR, a widely used benchmark for short-term interest rates, and to the returns of the FTSE One-Month U.S. Treasury Bill Index, a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.bnymellonim.com/us.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table provide some indication of the risks of investing in the fund.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.bnymellonim.com/us
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 (%) Class A
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

Best Quarter
Q3, 2012: 4.84%

Worst Quarter
Q3, 2011: -5.32%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 4.84%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (5.32%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deductions for fees, expenses or taxes
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 the 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 the period.


For the fund's Class Y shares, periods prior to the inception date reflect the performance of the fund's Class A shares, without reflecting any applicable sales charges for Class A shares. Such performance figures have not been adjusted to reflect applicable class expenses. 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 12/31/19)
BNY Mellon Global Real Return Fund | FTSE One-Month U.S. Treasury Bill Index reflects no deductions for fees, expenses or taxes  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 2.20%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.01%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.55% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Apr. 30, 2010
BNY Mellon Global Real Return Fund | USD 1-Month LIBOR reflects no deductions for fees, expenses or taxes  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 2.34%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.21%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.73% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Apr. 30, 2010
BNY Mellon Global Real Return Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
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
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets 0.25%
Other expenses - Fees and expenses of the fund's subsidiary rr_Component2OtherExpensesOverAssets 0.08%
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.11%
Total other expenses rr_OtherExpensesOverAssets 0.44%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 1.20%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [4]
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 1.12%
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.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 683
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 927
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,189
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,939
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 683
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 927
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,189
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,939
Annual Return 2011 rr_AnnualReturn2011 (0.22%)
Annual Return 2012 rr_AnnualReturn2012 4.01%
Annual Return 2013 rr_AnnualReturn2013 6.65%
Annual Return 2014 rr_AnnualReturn2014 4.10%
Annual Return 2015 rr_AnnualReturn2015 (0.22%)
Annual Return 2016 rr_AnnualReturn2016 2.41%
Annual Return 2017 rr_AnnualReturn2017 3.84%
Annual Return 2018 rr_AnnualReturn2018 0.94%
Annual Return 2019 rr_AnnualReturn2019 11.49%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 5.11%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.39%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.60%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate May 12, 2010
BNY Mellon Global Real Return Fund | Class A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.30%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.52%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.94%
BNY Mellon Global Real Return Fund | Class A | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 3.12%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.53%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.62%
BNY Mellon Global Real Return Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
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%
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets 0.25%
Other expenses - Fees and expenses of the fund's subsidiary rr_Component2OtherExpensesOverAssets 0.08%
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.15%
Total other expenses rr_OtherExpensesOverAssets 0.48%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 1.99%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [4]
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 1.91%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 294
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 617
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,065
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,310
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 194
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 617
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,065
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,310
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 9.70%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 2.85%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.47%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate May 12, 2010
BNY Mellon Global Real Return Fund | Class I  
Risk/Return: rr_RiskReturnAbstract  
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
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets none
Other expenses - Fees and expenses of the fund's subsidiary rr_Component2OtherExpensesOverAssets 0.08%
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.16%
Total other expenses rr_OtherExpensesOverAssets 0.24%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 1.00%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [4]
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 0.91%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 93
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 309
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 544
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,216
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 93
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 309
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 544
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,216
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.74%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.88%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 4.52%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate May 12, 2010
BNY Mellon Global Real Return Fund | Class Y  
Risk/Return: rr_RiskReturnAbstract  
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
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets none
Other expenses - Fees and expenses of the fund's subsidiary rr_Component2OtherExpensesOverAssets 0.08%
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.05%
Total other expenses rr_OtherExpensesOverAssets 0.13%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 0.89%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [4]
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 276
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 485
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,089
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 83
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 276
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 485
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,089
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 11.82%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.95%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 4.49%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jul. 01, 2013
[1] For comparative purposes, the value of the indices on April 30, 2010 is used as the beginning value on May 12, 2010.
[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.
[3] Acquired fund fees and expenses are incurred indirectly by the fund as a result of its investments in other investment companies (underlying funds). These fees and expenses are not included in the Financial Highlights tables; accordingly, total annual fund operating expenses do not correlate to the ratio of total expenses to average net assets in the Financial Highlights tables.
[4] The fund's investment adviser, BNY Mellon Investment Adviser, Inc., has contractually agreed, for so long as the fund invests in the subsidiary, to waive the management fee it receives from the fund in the amount equal to the management fee paid to BNY Mellon Investment Adviser, Inc. by the subsidiary. The amount of the waiver shown reflects the management fee paid by the subsidiary based on the fund's current allocation to the subsidiary. In addition, BNY Mellon Investment Adviser, Inc., has also contractually agreed, until February 28, 2021, to waive receipt of its fees and/or assume the direct expenses of the fund so that the direct expenses of none of the classes (excluding Rule 12b-1 fees, shareholder services fees, taxes, interest, brokerage commissions, commitment fees on borrowings and extraordinary expenses) exceed .90%. On or after February 28, 2021, BNY Mellon Investment Adviser, Inc. may terminate this expense limitation agreement at any time.