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BNY Mellon Global Dynamic Bond Income 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 income and 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 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 15 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 83.73% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 83.73%
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 normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in bonds and other instruments that provide investment exposure to global bond markets. The fund normally invests opportunistically in bonds and derivatives and other instruments that provide investment exposure to global bond and currency markets in seeking to produce positive returns across economic cycles. The fund seeks to provide a minimum average annual total return of US Dollar 1-Month LIBOR plus 3%, before fees and expenses, over a five-year period. There can be no guarantee that the fund will be able to provide such returns and you may lose money by investing in the fund.


The fund's investments are focused globally among the developed and emerging capital markets of the world. The fund's portfolio managers employ a dynamic approach in allocating the fund's assets globally, principally among government bonds, foreign country sovereign debt, debt obligations of supranational entities, emerging market sovereign debt, investment grade and high yield ("junk") corporate instruments, and currencies. Under normal market conditions, the fund invests significantly (at least 40% of its net assets) in 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.


The fund's 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. The fund, however, normally invests at least 10% of its net assets in each of government bonds, emerging market sovereign debt, and investment grade and high yield corporate instruments.


The fund may invest in bonds 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 in connection with its investment strategy, including as a substitute for investing directly in bonds and currencies, to increase returns, to manage credit, interest rate or currency risk, or to manage the effective maturity or duration of the fund's portfolio. 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 and swap agreements. 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.
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.


· 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. Unlike investment grade bonds, however, the prices of high yield ("junk") bonds may fluctuate unpredictably and not necessarily inversely with changes in interest rates. Interest rate changes may have different effects on the values of mortgage-related securities because of prepayment and extension risks.


· 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.


· Foreign government obligations and securities of supranational entities risk. Investing in foreign government obligations, debt obligations of supranational entities and the sovereign debt of foreign countries, including emerging market countries, creates exposure to the direct or indirect consequences of political, social or economic changes in the countries that issue the securities or in which the issuers are located. A governmental obligor may default on its obligations. Some sovereign obligors have been among the world's largest debtors to commercial banks, other governments, international financial organizations and other financial institutions. These obligors, in the past, have experienced substantial difficulties in servicing their external debt obligations, which led to defaults on certain obligations and the restructuring of certain indebtedness.


· 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.


· 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.


· 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. The market for below investment grade securities may be less liquid and therefore these securities may be harder to value or sell at an acceptable price, especially during times of market volatility or decline. Investments in foreign securities, particularly those of issuers located in emerging markets, tend to have greater exposure to liquidity risk than domestic securities.


· 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.


· High yield securities risk. High yield ("junk") securities involve greater credit risk, including the risk of default, than investment grade securities, and are considered predominantly speculative with respect to the issuer's ability to make principal and interest payments. The prices of high yield securities can fall in response to bad news about the issuer or its industry, or the economy in general, to a greater extent than those of higher rated securities.


· Market sector risk. The fund may significantly overweight or underweight certain countries, companies, industries or market sectors, which may cause the fund's performance to be more or less sensitive to developments affecting those countries, companies, industries or sectors.


· 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.


· European issuer risk. Decreasing imports or exports, changes in governmental or European Union (EU) regulations on trade, changes in the exchange rate of the euro, the default or threat of default by an EU member country on its sovereign debt, and/or an economic recession in an EU member country may have a significant adverse effect on the securities of EU issuers. The European financial markets have recently experienced volatility and adversity due to concerns about economic downturns, or rising government debt levels, in several European countries. These events have adversely affected the exchange rate of the euro and may continue to significantly affect every country in Europe. The risk of investing in Europe may be heightened due to the withdrawal of the United Kingdom from membership in the EU (known as "Brexit"). The terms of the United Kingdom's exit from the EU are not clear and the shape of the regulatory landscape is not yet defined. The current uncertainty and related future developments could have a negative impact on both the United Kingdom's economy and the economies of the other countries in Europe, as well as greater volatility in the global financial and currency markets.


· Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity.


· Non-diversification risk. The fund is non-diversified, which means that the fund may invest a relatively high percentage of its assets in a limited number of issuers. Therefore, the fund's performance may be more vulnerable to changes in the market value of a single issuer or group of issuers and more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.


· Management risk. The investment process used by the fund's portfolio managers could fail to achieve the fund's investment goal and cause your fund investment to lose value.

Risk Lose Money [Text] rr_RiskLoseMoney The fund's share price fluctuates, sometimes dramatically, which means you could lose money.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus The fund is non-diversified, which means that the fund may invest a relatively high percentage of its assets in a limited number of issuers. Therefore, the fund's performance may be more vulnerable to changes in the market value of a single issuer or group of issuers and more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.
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 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: 3.32%

Worst Quarter
Q2, 2015: -1.69%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.32%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (1.69%)
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 Dynamic Bond Income 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 0.59% [1]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2011
BNY Mellon Global Dynamic Bond Income Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [2]
Management fees rr_ManagementFeesOverAssets 0.40%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets 0.25%
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.42%
Total other expenses rr_OtherExpensesOverAssets 0.67%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 1.10%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [4]
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 1.08%
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 $ 555
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 782
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,027
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,728
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 555
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 782
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,027
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,728
Annual Return 2012 rr_AnnualReturn2012 10.01%
Annual Return 2013 rr_AnnualReturn2013 0.60%
Annual Return 2014 rr_AnnualReturn2014 2.54%
Annual Return 2015 rr_AnnualReturn2015 (1.05%)
Annual Return 2016 rr_AnnualReturn2016 3.33%
Annual Return 2017 rr_AnnualReturn2017 2.75%
Annual Return 2018 rr_AnnualReturn2018 0.58%
Annual Return 2019 rr_AnnualReturn2019 8.42%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 3.56%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.82%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.65%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 25, 2011
BNY Mellon Global Dynamic Bond Income Fund | Class A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 1.94%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 0.60%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.30%
BNY Mellon Global Dynamic Bond Income Fund | Class A | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 2.11%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 0.85%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 1.46%
BNY Mellon Global Dynamic Bond Income 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 0.40%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets 0.25%
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.45%
Total other expenses rr_OtherExpensesOverAssets 0.70%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 1.88%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [4]
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 1.83%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 286
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 586
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,011
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,197
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 186
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 586
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,011
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,197
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.54%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.99%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.41%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 25, 2011
BNY Mellon Global Dynamic Bond Income 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 0.40%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets none
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.38%
Total other expenses rr_OtherExpensesOverAssets 0.38%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 0.81%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets [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 259
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 450
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,002
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 83
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 259
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 450
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,002
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 8.71%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.00%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.44%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 25, 2011
BNY Mellon Global Dynamic Bond Income 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 0.40%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses - Shareholder services fees rr_Component1OtherExpensesOverAssets none
Other expenses - Miscellaneous other expenses rr_Component3OtherExpensesOverAssets 0.28%
Total other expenses rr_OtherExpensesOverAssets 0.28%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [3]
Total annual fund operating expenses rr_ExpensesOverAssets 0.71%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets [4]
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 0.71%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 73
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 227
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 395
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 883
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 73
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 227
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 395
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 883
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 8.71%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 3.03%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.40%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jul. 01, 2013
[1] For comparative purposes, the value of the index on March 31, 2011 is used as the beginning value on March 25, 2011.
[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, 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 0.80%. On or after February 28, 2021, BNY Mellon Investment Adviser, Inc. may terminate this expense limitation agreement at any time.