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Label Element Value
[RiskReturnAbstract] rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Jul. 14, 2014
Registrant Name dei_EntityRegistrantName Eaton Vance Growth Trust
Central Index Key dei_EntityCentralIndexKey 0000102816
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jun. 26, 2014
Document Effective Date dei_DocumentEffectiveDate Jul. 01, 2014
Prospectus Date rr_ProspectusDate Feb. 01, 2014
Eaton Vance Atlanta Capital SMID-Cap Fund
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Objective [Heading] rr_ObjectiveHeading

Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to seek long-term capital growth.
Expense [Heading] rr_ExpenseHeading

Fees and Expenses of the Fund
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 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 29 of this Prospectus and page 23 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 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” 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 9 % of the average value of its portfolio.
Expense Footnotes [Text Block] rr_ExpenseFootnotesTextBlock * Expenses in the table above and the Example below reflect the expenses of the Fund and the SMID-Cap Portfolio (the "Portfolio"), the Fund's master Portfolio.
Expense Breakpoint Discounts [Text] 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 28 of this Prospectus and page 22 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 [Text Block] 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:
Strategy [Heading] rr_StrategyHeading

Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund invests primarily in common stocks of companies with small to mid-sized market capitalizations (“small- to mid-cap stocks”). The Fund will normally invest in common stocks of companies having market capitalizations within the range of companies comprising the Russell 2500 Index. Under normal circumstances, the Fund invests at least 80% of its net assets in small- to mid-cap stocks (the “80% Policy”). The Fund may also invest in larger companies and in dollar-denominated securities of foreign companies that trade on U.S. exchanges or in the over-the-counter market (including depositary receipts which evidence ownership in underlying foreign stocks). The Fund may also lend its securities.

The portfolio managers seek to invest in quality companies with a demonstrated history of consistent growth and stability in earnings that they believe are attractively valued relative to earnings and cash flow per share. Financial quality is measured by a company’s demonstrated ability to consistently grow earnings. Other characteristics of quality companies include a history of sustained growth in earnings and operating cash flow; high returns on capital; attractive profit margins; and leading industry positions. The portfolio managers seek to purchase stocks of companies capable of sustaining consistent earnings growth while maintaining a strong financial condition. Investments are determined based primarily on fundamental analysis of a company’s financial trends, products and services and other factors. The portfolio managers may utilize “financial quality rankings” provided by nationally recognized rating services as part of their investment analysis but do not rely solely upon such rankings in making investment decisions. The portfolio managers may sell a security when its fundamentals deteriorate or when it is no longer attractively valued in relation to the market as a whole or other potential investments. The portfolio managers seek to manage portfolio risk by constructing a diversified portfolio of undervalued companies and favoring companies with a history of consistent sustained growth and stability in earnings and operating cash flow.

The Fund currently invests its assets in the Portfolio, a separate registered investment company with the same objective and policies as the Fund.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration

The Fund invests primarily in common stocks of companies with small to mid-sized market capitalizations (“small- to mid-cap stocks”). The Fund will normally invest in common stocks of companies having market capitalizations within the range of companies comprising the Russell 2500 Index. Under normal circumstances, the Fund invests at least 80% of its net assets in small- to mid-cap stocks (the “80% Policy”). The Fund may also invest in larger companies and in dollar-denominated securities of foreign companies that trade on U.S. exchanges or in the over-the-counter market (including depositary receipts which evidence ownership in underlying foreign stocks). The Fund may also lend its securities .
Risk [Heading] rr_RiskHeading

Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

Equity Investing Risk. The Fund’s shares are sensitive to stock market volatility and the stocks in which the Fund invests may be more volatile than the stock market as a whole. The prices of stocks may decline in response to conditions affecting the general economy; overall market changes; local, regional or global political, social or economic instability; and currency, interest rate and commodity price fluctuations, as well as issuer or sector specific events. Market conditions may affect certain types of stocks (such as small-cap or mid-cap stocks) to a greater extent than other types of stocks. If the stock market declines, the value of Fund shares will also likely decline and, although stock values can rebound, there is no assurance that values will return to previous levels. Depositary receipts are subject to many of the risks associated with investing in foreign securities including political and economic risks.

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 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.

Securities Lending Risk. Securities lending involves possible delay in recovery of the securities or possible loss of rights in the collateral should the borrower fail financially. As a result, the value of Fund shares may fall and there may be a delay in recovering the loaned securities. The value of Fund shares could also fall if a loan is called and the Fund is required to liquidate reinvested collateral at a loss or if the sub- adviser is unable to reinvest cash collateral at rates that exceed the costs involved.

Risks Associated with Active Management. The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the sub-adviser to develop and effectively implement strategies to achieve the Fund’s investment objective. Subjective decisions made by the sub-adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks. The Fund is not a complete investment program and you may lose money by investing in the Fund. All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective. Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and Annual Fund Operating Expenses may differ in the future. Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective. In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. 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. Mutual funds, investment advisers, other market participants and many securities markets are subject to rules and regulations and the jurisdiction of one or more regulators. Changes to applicable rules and regulations could have an adverse affect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.
Risk Lose Money [Text] rr_RiskLoseMoney

 The Fund is not a complete investment program and you may lose money by investing in the Fund.
Risk Not Insured Depository Institution [Text] 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 [Text Block] 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 compare with those of two broad-based securities market indices. 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 [Text] 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 compare with those of two broad-based securities market indices.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (both before and after taxes) is no guarantee of future results.
Bar Chart Does Not Reflect Sales Loads [Text] 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 [Text Block] rr_BarChartClosingTextBlock

For the ten years ended December 31, 2013, the highest quarterly total return for Class A was 17.65 % for the quarter ended June 30, 2009, and the lowest quarterly return was –19. 71 % for the quarter ended December 31, 2008.
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel

For the ten years ended December 31, 2013 , the highest quarterly total return for Class A was
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.67%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.66%)
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads

These returns reflect the maximum sales charge for Class A (5.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C.

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 [Text] 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 a period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and 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 Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text] rr_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod

The Class C performance shown above for the period prior to October 1, 2009 (commencement of operations) is the performance of Class A shares, adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in expenses of the two classes). The Class R performance shown above for the period between August 3, 2009 (re-commencement of operations) and September 11, 2004 (date of closing of Class R) is the performance of Class A shares, adjusted for the sales charge that applies to Class A shares (but not adjusted for any other differences in expenses of the two classes). The Class R6 performance shown above for the period prior to July 1, 2014 (commencement of operations) is the performance of Class I shares at net asset value without adjustment for any differences in the expenses of the two classes. If adjusted for such differences, returns would be different.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (5.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class C. The Class C performance shown above for the period prior to October 1, 2009 (commencement of operations) is the performance of Class A shares, adjusted for the sales charge that applies to Class C shares (but not adjusted for any other differences in expenses of the two classes). The Class R performance shown above for the period between August 3, 2009 (re-commencement of operations) and September 11, 2004 (date of closing of Class R) is the performance of Class A shares, adjusted for the sales charge that applies to Class A shares (but not adjusted for any other differences in expenses of the two classes). The Class R6 performance shown above for the period prior to July 1, 2014 (commencement of operations) is the performance of Class I shares at net asset value without adjustment for any differences in the expenses of the two classes. If adjusted for such differences, returns would be different. 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 Atlanta Capital SMID-Cap Fund | Class A
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol EAASX
Maximum Sales Charge (Load) (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 purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.87%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.14%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.26%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.25%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 695
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 951
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,226
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,009
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 695
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 951
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,226
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,009
Annual Return 2004 rr_AnnualReturn2004 18.55%
Annual Return 2005 rr_AnnualReturn2005 4.51%
Annual Return 2006 rr_AnnualReturn2006 14.43%
Annual Return 2007 rr_AnnualReturn2007 11.74%
Annual Return 2008 rr_AnnualReturn2008 (26.20%)
Annual Return 2009 rr_AnnualReturn2009 34.94%
Annual Return 2010 rr_AnnualReturn2010 25.53%
Annual Return 2011 rr_AnnualReturn2011 5.44%
Annual Return 2012 rr_AnnualReturn2012 13.91%
Annual Return 2013 rr_AnnualReturn2013 35.72%
1 Year rr_AverageAnnualReturnYear01 27.91%
5 Years rr_AverageAnnualReturnYear05 21.06%
10 Years rr_AverageAnnualReturnYear10 11.76%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class C
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol ECASX
Maximum Sales Charge (Load) (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 purchase or redemption) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.87%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.14%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.01%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 2.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 303
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 630
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,082
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,337
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 203
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 630
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,082
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 2,337
1 Year rr_AverageAnnualReturnYear01 33.76%
5 Years rr_AverageAnnualReturnYear05 21.73%
10 Years rr_AverageAnnualReturnYear10 12.07%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class I
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol EISMX
Maximum Sales Charge (Load) (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 purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.87%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.14%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.01%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 321
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 557
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,235
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 102
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 321
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 557
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,235
1 Year rr_AverageAnnualReturnYear01 36.06%
5 Years rr_AverageAnnualReturnYear05 22.80%
10 Years rr_AverageAnnualReturnYear10 12.70%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class R
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol ERSMX
Maximum Sales Charge (Load) (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 purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.87%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses rr_OtherExpensesOverAssets 0.14%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.51%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.50%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 153
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 476
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 823
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,801
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 153
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 476
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 823
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 1,801
1 Year rr_AverageAnnualReturnYear01 35.43%
5 Years rr_AverageAnnualReturnYear05 22.26%
10 Years rr_AverageAnnualReturnYear10 12.28%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class R6
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol ERASX
Maximum Sales Charge (Load) (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 purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.87%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.06%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.93%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 295
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 514
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,142
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 94
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 295
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 514
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,142
1 Year rr_AverageAnnualReturnYear01 36.06%
5 Years rr_AverageAnnualReturnYear05 22.80%
10 Years rr_AverageAnnualReturnYear10 12.70%
Eaton Vance Atlanta Capital SMID-Cap Fund | After Taxes on Distributions | Class A
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 27.71%
5 Years rr_AverageAnnualReturnYear05 20.97%
10 Years rr_AverageAnnualReturnYear10 11.12%
Eaton Vance Atlanta Capital SMID-Cap Fund | After Taxes on Distributions and Sales | Class A
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.95%
5 Years rr_AverageAnnualReturnYear05 17.29%
10 Years rr_AverageAnnualReturnYear10 9.67%
Eaton Vance Atlanta Capital SMID-Cap Fund | Russell 2500 Index
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 36.80%
5 Years rr_AverageAnnualReturnYear05 21.75%
10 Years rr_AverageAnnualReturnYear10 9.80%
Eaton Vance Atlanta Capital SMID-Cap Fund | Russell 2000 Index
  
[RiskReturnAbstract] rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 38.82%
5 Years rr_AverageAnnualReturnYear05 20.07%
10 Years rr_AverageAnnualReturnYear10 9.06%
[1] The sub-adviser has agreed to reimburse the Fund's expenses to the extent that Total Annual Fund Operating Expenses exceed 1.25% for Class A shares, 2.00% for Class C shares, 1.00% for Class I shares, 1.50% for Class R shares and 0.92% for Class R6 shares. This expense reimbursement will continue through January 31, 2016. Any amendment to or a termination of this reimbursement would require written 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, interest expense, taxes or litigation expenses. Amounts reimbursed may be recouped by the sub-adviser during the Fund's current fiscal year to the extent actual expenses are less than the contractual expense cap during such year.