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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 growth of capital.

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 10 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)
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 55.27% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 55.27%
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. 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 common stocks or securities convertible into common stocks of foreign companies and depositary receipts evidencing ownership in such securities. At least 75% of the fund's net assets will be invested in countries represented in the Morgan Stanley Capital International Europe, Australasia and Far East (MSCI EAFE®) Index. The fund may invest up to 25% of its net assets in stock of companies located in countries (other than the United States) not represented in the MSCI EAFE Index, including up to 20% in emerging market countries.


The core of the investment philosophy of Newton Capital Management Limited (Newton), an affiliate of The Dreyfus Corporation and the fund's sub-investment adviser, is the belief that no company, market or economy can be considered in isolation; each must be understood within a global context. Newton believes that a global comparison of companies is the most effective method of stock analysis, and Newton's global analysts research investment opportunities by global sector rather than by region. The process begins by identifying a core list of investment themes that Newton believes will positively or negatively affect certain sectors or industries and cause stocks within these sectors or industries to outperform or underperform others. Newton then identifies specific companies using these investment themes to help focus on areas where thematic and strategic research indicates superior returns are likely to be achieved.


Sell decisions for individual stocks will typically be a result of one or more of the following:


· A change in investment theme or strategy


· Profit-taking


· A significant change in the prospects of a company


· Price movement and market activity have created an extreme valuation


· The valuation of a company has become expensive against its peers


The fund may, but is not required to, use derivatives, such as futures, options and forward contracts, as a substitute for investing directly in an underlying asset or currency, to increase returns, to manage currency risk, or as part of a hedging strategy.

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 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.


· 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. Emerging markets tend to be more volatile and less liquid than the markets of more mature economies, and generally have less diverse and less mature economic structures and less stable political systems than those of developed countries. To the extent the fund's investments are concentrated in one or a limited number of foreign countries, the fund's performance could be more volatile than that of more geographically diversified funds.


· 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.


· 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. Derivatives can be highly volatile, illiquid and difficult to value. Certain types of derivatives, including forward contracts and other over-the-counter transactions, involve greater risks than the underlying obligations because, in addition to general market risks, they are subject to illiquidity risk, counterparty risk, credit risk and pricing risk.


· 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.

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 I 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 I
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
Q2, 2009: 18.01%


Worst Quarter
Q3, 2008: -21.85%

Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.01%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.85%)
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 I 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 I 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.


For the fund's Class A, C and Y shares, periods prior to the inception date reflect the performance of the fund's Class I shares adjusted to reflect any applicable sales charges. Such performance figures have not been adjusted to reflect applicable class fees and expenses; if such fees and expenses had been reflected, the performance shown for Class A and C shares for such periods would have been lower. For comparative purposes, the value of the MSCI EAFE Index on December 31, 2005 is used as the beginning value on December 21, 2005.

Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (as of 12/31/13)
MSCI EAFE Index reflects no deduction for fees, expenses or taxes
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 22.78%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 12.44%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 4.56%
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]
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses (including shareholder services fees) rr_OtherExpensesOverAssets 0.54%
Total annual fund operating expenses rr_ExpensesOverAssets 1.34%
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 704
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 975
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,267
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,095
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 704
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 975
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,267
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,095
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 10.61%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 8.91%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 2.78%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2008
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%
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other expenses (including shareholder services fees) rr_OtherExpensesOverAssets 0.58%
Total annual fund operating expenses rr_ExpensesOverAssets 2.13%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 316
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 667
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,144
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,462
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 216
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 667
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,144
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,462
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 15.43%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 9.44%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.04%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2008
Dreyfus/Newton International Equity 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_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses (including shareholder services fees) rr_OtherExpensesOverAssets 0.21%
Total annual fund operating expenses rr_ExpensesOverAssets 1.01%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 103
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 322
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 558
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,236
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 103
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 322
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 558
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,236
Annual Return 2006 rr_AnnualReturn2006 20.62%
Annual Return 2007 rr_AnnualReturn2007 17.70%
Annual Return 2008 rr_AnnualReturn2008 (42.46%)
Annual Return 2009 rr_AnnualReturn2009 21.92%
Annual Return 2010 rr_AnnualReturn2010 9.33%
Annual Return 2011 rr_AnnualReturn2011 (14.57%)
Annual Return 2012 rr_AnnualReturn2012 22.90%
Annual Return 2013 rr_AnnualReturn2013 17.74%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 17.74%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 10.51%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.73%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Dec. 21, 2005
Dreyfus/Newton International Equity Fund - Class I | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 17.38%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 10.26%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.23%
Dreyfus/Newton International Equity Fund - Class I | After Taxes on Distributions and Sale of Fund Shares
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 10.59%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 9.22%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.18%
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_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses (including shareholder services fees) rr_OtherExpensesOverAssets 0.14%
Total annual fund operating expenses rr_ExpensesOverAssets 0.94%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 96
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 300
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 520
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,155
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 96
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 300
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 520
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,155
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 17.72%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 10.50%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.73%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Jul. 01, 2013
[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.