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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Central Index Key dei_EntityCentralIndexKey 0000102816
Eaton Vance Hexavest International Equity Fund  
Risk/Return: rr_RiskReturnAbstract  
Investment Objective, Heading rr_ObjectiveHeading

Investment Objective
Investment Objective, Primary rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is long-term capital appreciation.
Expense, Heading rr_ExpenseHeading

Fees and Expenses of the Fund
Expense, Narrative 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 a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance funds. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 24 of this Prospectus and page 21 of the Fund’s Statement of Additional Information.
Shareholder Fees, Caption rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)
Operating Expenses, Caption rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Heading rr_PortfolioTurnoverHeading

Portfolio Turnover
Portfolio Turnover rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio). A higher portfolio turnover rate 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 88 % of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 88.00%
Expense Breakpoint, Discounts rr_ExpenseBreakpointDiscounts

You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance funds. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 24 of this Prospectus and page 21 of the Fund’s Statement of Additional Information.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example, Heading rr_ExpenseExampleHeading

Example.
Expense Example, Narrative rr_ExpenseExampleNarrativeTextBlock

This 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 operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading rr_StrategyHeading

Principal Investment Strategies
Investment Strategy, Narrative rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of foreign companies (the “80% Policy”). A company will be considered a foreign company if it is domiciled in and tied economically to one or more countries represented in the MSCI Europe, Australasia, Far East Index (“MSCI EAFE Index”) and may include stocks of companies that trade in the form of depositary receipts. The MSCI EAFE Index is an unmanaged index of approximately 900 companies located in 21 countries. The Fund may also invest in securities issued by companies domiciled in emerging market countries .

 

The Fund may invest in securities issued by companies with a broad range of market capitalizations, including smaller companies. The Fund may invest in exchange-traded funds (“ETFs”), a type of pooled investment vehicle, in order to equitize cash positions or seek exposure to certain markets or markets sectors. The Fund may also lend its securities. The Fund will actively manage its exposure to foreign currencies and may seek to enhance return by increasing or decreasing its exposure to foreign currencies. The Fund expects to increase or decrease its foreign currency exposure primarily by entering into forward foreign currency exchange contracts. The Fund may also invest in futures contracts to enable changes in macroeconomic strategies to be efficiently and cost-effectively implemented, as well as to manage cash flows. Both forward foreign currency exchange contracts and futures contracts are types of derivative instruments. The Fund may use derivatives consistent with its 80% Policy.

 

The Fund is managed using a predominately top-down investment style that incorporates proprietary fundamental research and quantitative models. The regional, country, currency, sector, and industry allocations of the portfolio are based primarily on the sub-adviser’s analysis of the macroeconomic environment, valuations of markets and the sentiment of investors (which often results in a contrarian view and value bias). Individual stock selection is based on fundamental research, optimization and quantitative screening to achieve desired market exposures and to emphasize stocks identified as having higher return potential. At the top-down level, sell decisions will be based on a significant deterioration in the macroeconomic environment, valuation and/or sentiment. At the individual security level, sell decisions are based on a change in strategy at the top-down level or on a significant change in fundamentals or relative valuation of the security. The portfolio managers seek to manage investment risk by using quantitative tools to assist in portfolio construction and monitoring and maintaining desired market exposures across the Fund’s holdings.
Strategy Portfolio Concentration rr_StrategyPortfolioConcentration

Under normal market conditions, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of foreign companies (the “80% Policy”). A company will be considered a foreign company if it is domiciled in and tied economically to one or more countries represented in the MSCI Europe, Australasia, Far East Index (“MSCI EAFE Index”) and may include stocks of companies that trade in the form of depositary receipts. The MSCI EAFE Index is an unmanaged index of approximately 900 companies located in 21 countries. The Fund may also invest in securities issued by companies domiciled in emerging market countries.
Risk, Heading rr_RiskHeading

Principal Risks
Risk, Narrative rr_RiskNarrativeTextBlock

Equity Investing Risk. Fund performance is sensitive to stock market volatility. Stock prices may decline in response to adverse changes in the economy or the economic outlook; deterioration in investor sentiment; interest rate, currency, and commodity price fluctuations; adverse geopolitical, social or environmental developments; issuer- and sector-specific considerations; and other factors. Market conditions may affect certain types of stocks to a greater extent than other types of stocks. If the stock market declines, the value of Fund shares will also likely decline. Although stock prices can rebound, there is no assurance that values will return to previous levels.

 

Foreign and Emerging Market Investment Risk. Because the Fund invests a significant portion of its assets in foreign instruments, the value of shares may be adversely affected by changes in currency exchange rates and political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country. Investment markets in emerging market countries are typically smaller, less liquid and more volatile than developed markets, and emerging market securities often involve higher risk than developed market securities . Trading in foreign markets often involves higher expense than trading in the United States. The value of investments denominated in foreign currencies can be adversely affected by changes in foreign currency exchange rates. Depositary receipts are subject to many of the risks associated with investing directly in foreign instruments.

 

Derivatives Risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints. Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund .  A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. Changes in the value of a derivative may not correlate perfectly with the underlying asset, rate or index . Derivative instruments traded in over-the-counter markets may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument. If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty. The loss on derivative transactions may substantially exceed the initial investment , particularly when there is no stated limit on the Fund’s use of derivatives .

 

Currency Risk. In general, fluctuations in foreign currency values will result in fluctuations in the U.S. dollar value of Fund securities denominated in that foreign currency. If the U.S. dollar rises in value relative to a foreign currency, a security denominated in that foreign currency will be worth less in U.S. dollars. If the U.S. dollar decreases in value relative to a foreign currency, a security denominated in that foreign currency will be worth more in U.S. dollars. The value of foreign currencies as measured in U.S. dollars may be unpredictably affected by changes in foreign currency rates and exchange control regulations, application of foreign tax laws (including withholding tax), governmental administration of economic or monetary policies (in the U.S. or abroad), intervention (or the failure to intervene) by U.S. or foreign governments or central banks, and relations between nations. A devaluation of a currency by a country’s government or banking authority will have a significant impact on the value of any investments denominated in that currency. Currency markets generally are not as regulated as securities markets and currency transactions are subject to settlement, custodial and other operational risks. Exposure to foreign currencies through derivative instruments will be subject to derivative risks described herein.

 

Smaller Company Equity Risk. The stocks of smaller, less seasoned companies are generally subject to greater price fluctuations, limited liquidity, higher transaction costs and higher investment risk than the stocks of larger, more established companies. Smaller, less seasoned companies may have limited product lines, markets or financial resources, may be dependent on a limited management group, and may lack substantial capital reserves or an established performance record. There may be generally less publicly available information about such companies than for larger, more established companies.

 

ETF Risk.  ETFs are subject to the risks of investing in the underlying securities. ETF shares may trade at a premium or discount to net asset value and are subject to secondary market trading risks. In addition, the Fund will bear a pro rata portion of the operating expenses of an ETF in which it invests .

 

Securities Lending Risk. Securities lending involves possible delay in recovery of the loaned securities or possible loss of rights in the collateral if the borrower fails financially.

 

Risks Associated with Active and Quantitative Management. The success of the Fund’s investment program depends on portfolio management’s successful application of analytical skills and investment judgment. Active management involves subjective decisions. The portfolio managers also use quantitative investment techniques and analyses in making investment decisions for the Fund. There can be no assurance that these techniques will achieve the desired results.

 

General Fund Investing Risks. The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. The Fund is designed to be a long-term investment vehicle and is not suited for short-term trading. Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.
Risk, Lose Money rr_RiskLoseMoney

The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund.
Risk, Not Insured Depository Institution rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.
Bar Chart and Performance Table, Heading rr_BarChartAndPerformanceTableHeading

Performance
Performance, Narrative rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compares with those of a broad-based securities market index. The returns in the bar chart are for Class A shares and do not reflect a sales charge. If the sales charge was reflected, the returns would be lower. Past performance (both before and after taxes) is no guarantee of future results. The Fund’s performance reflects the effects of expense reductions. Absent these reductions, performance would have been lower. Updated Fund performance information can be obtained by visiting www.eatonvance.com.
Performance, Information Illustrates Variability of Returns rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and how the Fund’s average annual returns over time compares with those of a broad-based securities market index.
Performance Availability Website Address rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com
Performance Past Does Not Indicate Future rr_PerformancePastDoesNotIndicateFuture

Past performance (both before and after taxes) is no guarantee of future results.
Bar Chart Does Not Reflect Sales Loads rr_BarChartDoesNotReflectSalesLoads

The returns in the bar chart are for Class A shares and do not reflect a sales charge. If the sales charge was reflected, the returns would be lower.

Bar Chart, Closing rr_BarChartClosingTextBlock

During the period from December 31, 2012 to December 31, 201 5 , the highest quarterly total return for Class A was 9.39% for the quarter ended September 30, 2013, and the lowest quarterly return was - 7.01 % for the quarter ended September 30, 2015 . The year-to-date total return through the end of the most recent calendar quarter (December 31, 201 5 to September 30, 201 6 ) was 4.80 %.
Year to Date Return, Label rr_YearToDateReturnLabel

The year-to-date total return through the end of the most recent calendar quarter (December 31, 201 5 to September 30, 201 6 ) was
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 4.80%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel

During the period from December 31, 2012 to December 31, 201 5 , the highest quarterly total return for Class A was
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.39%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (7.01%)
Performance Table Heading rr_PerformanceTableHeading

Average Annual Total Return as of December 31, 2015
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads

These returns reflect the maximum sales charge for Class A (5.75%).
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes.  Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities.
Performance Table, One Class of after Tax Shown rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher

Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period.  Also, Return After Taxes on Distributions and the Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.
Performance Table, Closing rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (5.75%). Class A and Class I commenced operations on August 29, 2012. (Source for the MSCI EAFE Index: MSCI.) MSCI data may not be reproduced or used for any other purpose. MSCI provides no warranties, has not prepared or approved this report, and has no liability hereunder. Investors cannot invest directly in an Index.

 

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown. After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities. After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and the Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.
Eaton Vance Hexavest International Equity Fund | MSCI EAFE Index (reflects net dividends, which reflects the deduction of withholding taxes)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes

(reflects net dividends, which reflects the deduction of withholding taxes)
One Year rr_AverageAnnualReturnYear01 (0.81%)
Life of Fund rr_AverageAnnualReturnSinceInception 7.32%
Eaton Vance Hexavest International Equity 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 the lower of net asset value at time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 2.03%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.08%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 3.16%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.88%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.28%
1 Year rr_ExpenseExampleYear01 $ 698
3 Years rr_ExpenseExampleYear03 1,327
5 Years rr_ExpenseExampleYear05 1,980
10 Years rr_ExpenseExampleYear10 $ 3,719
2013 rr_AnnualReturn2013 19.12%
2014 rr_AnnualReturn2014 (6.00%)
2015 rr_AnnualReturn2015 (1.40%)
One Year rr_AverageAnnualReturnYear01 (7.05%)
Life of Fund rr_AverageAnnualReturnSinceInception 2.61%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 29, 2012
Eaton Vance Hexavest International Equity Fund | Class A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (7.27%)
Life of Fund rr_AverageAnnualReturnSinceInception 1.68%
Eaton Vance Hexavest International Equity Fund | Class A | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
One Year rr_AverageAnnualReturnYear01 (3.58%)
Life of Fund rr_AverageAnnualReturnSinceInception 1.98%
Eaton Vance Hexavest 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 the lower of net asset value at time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 2.03%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.08%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.91%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.88%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.03%
1 Year rr_ExpenseExampleYear01 $ 105
3 Years rr_ExpenseExampleYear03 723
5 Years rr_ExpenseExampleYear05 1,367
10 Years rr_ExpenseExampleYear10 $ 3,098
One Year rr_AverageAnnualReturnYear01 (1.14%)
Life of Fund rr_AverageAnnualReturnSinceInception 4.73%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 29, 2012
[1] The investment adviser and administrator and the sub-adviser have agreed to reimburse the Fund's expenses to the extent that Total Annual Fund Operating Expenses exceed 1.20% for Class A shares and 0.95% for Class I shares. This expense reimbursement will continue through November 30, 201 7 . Any amendment to or termination of this reimbursement would require approval of the Board of Trustees. The expense reimbursement relates to ordinary operating expenses only and does not include expenses such as: brokerage commissions, acquired fund fees and expenses of unaffiliated funds, interest expense, taxes or litigation expenses. Amounts reimbursed may be recouped by the investment adviser and administrator and the sub-adviser during the same fiscal year to the extent actual expenses are less than the contractual expense cap during such year.