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Label Element Value
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 growth.

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 certain funds in the Dreyfus Family of Funds. More information about these and other discounts is available from your financial professional and in the Shareholder Guide section beginning on page 11 of this 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 2015-01-01
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 31.53% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 31.53%
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 certain funds in the Dreyfus Family of Funds.
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 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 by The Dreyfus Corporation. 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 equity securities of companies: (i) that have their registered office in Brazil; (ii) whose principal trading market is in Brazil; or (iii) that have a majority of their assets, or that derive a significant portion of their revenue or profits from businesses, investments or sales, in Brazil. The fund may invest in the stocks of companies of any size, although it focuses on large and mid-cap companies (generally, with market capitalizations of $2 billion or more at the time of purchase). The fund's sub-investment adviser seeks investment opportunities in companies with sustainable earnings, attractive valuations and high dividend yields that indicate the potential for strong sustainable capital growth. The sub-adviser constructs the fund's portfolio through a combination of quantitative and fundamental bottom-up research, and an understanding of local/regional macroeconomic trends. In selecting securities, the fund's portfolio managers use a three-step investment process consisting of: (1) quantitative analysis, (2) fundamental analysis and (3) portfolio construction.

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.


· Risks of concentrating investments in Brazil. The fund's performance will be influenced by political, social and economic factors affecting Brazil. Special risks include exposure to currency fluctuations, less liquidity, less developed or efficient trading markets, lack of comprehensive company information, political instability and differing accounting and legal standards. Because the fund's investments are concentrated in Brazil, the fund's performance could be more volatile than that of more geographically diversified funds.


As an emerging market, the Brazilian market tends to be more volatile than the markets of more mature economies, and generally has a less diverse and less mature economic structure and a less stable political system than those of developed countries. Certain political, economic, legal and currency risks have contributed to a high level of price volatility in the Brazilian equity and currency markets and could adversely affect investments in the fund. Brazil has historically experienced high rates of inflation and may continue to do so. Inflationary pressures may slow the rate of growth of the Brazilian economy and may lead to further government intervention in the economy, which could adversely affect the fund's investments. Brazil continues to suffer from chronic structural public sector deficits. Unanticipated political or social developments may result in increased volatility in the fund's share price and sudden and significant investment losses.


· Emerging market risk. The securities of issuers located in emerging markets tend to be more volatile and less liquid than the securities of issuers located in more mature economies, and emerging markets generally have less diverse and less mature economic structures and less stable political systems than those of developed countries. The securities of issuers located or doing substantial business in emerging markets are often subject to rapid and large changes in price.


· 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. Currency exchange rates may fluctuate significantly over short periods of time. Foreign currencies are also subject to risks caused by inflation, interest rates, budget deficits and low savings rates, political factors and government intervention and controls.


· 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 weakness in the stock market or because of factors that affect the company or its particular industry.


· 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 in foreign securities, particularly those of issuers located in emerging markets, tend to have greater exposure to liquidity risk than domestic securities.


· 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.

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. 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. 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. More recent performance information may be available at www.dreyfus.com.

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.dreyfus.com
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, 2010: 19.19%


Worst Quarter
Q3, 2011: -25.57%


The year-to-date total return of the fund's Class A shares as of September 30, 2013 was -10.37%.

Year to Date Return, Label rr_YearToDateReturnLabel The year-to-date total return of the fund's Class A shares
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2013
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (10.37%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 19.19%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.57%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction 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 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 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 tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (as of 12/31/12)
Morgan Stanley Capital International® 10/40 Brazil NR Index reflects no deduction for fees, expenses or taxes
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 2.33%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.74%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 2009
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_MaximumDeferredSalesChargeOverOther none [1]
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 1.25%
Distribution (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses (including shareholder services fees) rr_OtherExpensesOverAssets 1.09%
Total annual fund operating expenses rr_ExpensesOverAssets 2.34%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.34%)
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 2.00% [2]
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 766
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,233
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,724
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,073
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 766
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 1,233
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,724
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 3,073
Annual Return 2010 rr_AnnualReturn2010 10.17%
Annual Return 2011 rr_AnnualReturn2011 (16.14%)
Annual Return 2012 rr_AnnualReturn2012 6.69%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.54%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.99%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 2009
Class A | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 (0.40%)
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.56%
Class A | After Taxes on Distributions and Sale of Fund Shares
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 0.58%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.71%
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_MaximumDeferredSalesChargeOverOther 1.00%
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 1.25%
Distribution (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other expenses (including shareholder services fees) rr_OtherExpensesOverAssets 1.16%
Total annual fund operating expenses rr_ExpensesOverAssets 3.16%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.41%)
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 2.75% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 378
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 936
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,619
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,438
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 278
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 936
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,619
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 3,438
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 4.86%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.15%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 2009
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_MaximumDeferredSalesChargeOverOther none
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Management fees rr_ManagementFeesOverAssets 1.25%
Distribution (Rule 12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses (including shareholder services fees) rr_OtherExpensesOverAssets 1.15%
Total annual fund operating expenses rr_ExpensesOverAssets 2.40%
Fee waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.65%)
Total annual fund operating expenses (after fee waiver and/or expense reimbursement) rr_NetExpensesOverAssets 1.75% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 178
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 686
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,222
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,687
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 178
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 686
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,222
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,687
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 6.91%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.10%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 2009
[1] 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.
[2] The Dreyfus Corporation has contractually agreed, until January 1, 2015, to waive receipt of its fees and/or assume the direct expenses of the fund so that the 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 1.75%. On or after January 1, 2015, The Dreyfus Corporation may terminate this expense limitation at any time.