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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
SEC Form dei_DocumentType 485BPOS
Period end date dei_DocumentPeriodEndDate Sep. 30, 2022
Registrant Name dei_EntityRegistrantName EATON VANCE GROWTH TRUST
Registrant CIK dei_EntityCentralIndexKey 0000102816
Amendment Flag dei_AmendmentFlag false
Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol EAALX
Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol EAGCX
Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol EILGX
Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol ESEAX
Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol ESECX
Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol ESEIX
Class R6  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol ESERX
Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol EAASX
Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol ECASX
Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol EISMX
Class R  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol ERSMX
Class R6  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol ERASX
Eaton Vance Atlanta Capital Focused Growth Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return rr_RiskReturnHeading Eaton Vance Atlanta Capital Focused Growth Fund
Objective rr_ObjectiveHeading Investment Objective
Objective, Primary rr_ObjectivePrimaryTextBlock

The Fund's investment objective is to seek long-term capital growth.

Expense 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, hold and sell shares of the Fund.  Investors may also pay commissions or other fees to their financial intermediary, which are not reflected below.  You may qualify for a reduced sales charge on purchases of Class A shares if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds. Certain financial intermediaries also may offer variations in Fund sales charges to their customers as described in Appendix A – Financial Intermediary Sales Charge Variations in this Prospectus. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 31 of this Prospectus and page 24 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 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  7%  of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 7.00%
Expense Breakpoint Discounts rr_ExpenseBreakpointDiscounts You may qualify for a reduced sales charge on purchases of Class A shares if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds. Certain financial intermediaries also may offer variations in Fund sales charges to their customers as described in Appendix A – Financial Intermediary Sales Charge Variations in this Prospectus. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 31 of this Prospectus and page 24 of the Fund’s Statement of Additional Information.
Expense Breakpoint, Minimum Investment Required rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example 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, that the operating expenses remain the same and that any expense reimbursement arrangement remains in place for the contractual period.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy rr_StrategyHeading Principal Investment Strategies
Strategy Narrative rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests in common stocks of approximately 20 to 35 companies, primarily with large market capitalizations. The Fund will normally invest in common stocks of companies having market capitalizations that rank among the top 1,000 U.S. companies. The Fund may invest in U.S. 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) and in publicly traded real estate investment trusts (“REITs”). The Fund is “non-diversified” and may invest, a greater percentage of its assets in the securities of a single issuer than a “diversified” fund.

Through investment in high quality companies, the portfolio management team seeks to build a portfolio that may participate in rising markets while minimizing participation in declining markets.  Quality is determined by analysis of a company’s financial statements and is measured by a company’s demonstrated ability to consistently grow earnings over the long-term. The portfolio managers believe that high quality companies typically have strong balance sheets, sustainable cash flow, enduring competitive advantages, long product cycles, and stable demand over a business cycle, among other characteristics.  The portfolio managers also may utilize “financial quality rankings” provided by nationally recognized rating services when determining quality.

The portfolio managers are responsible for fundamental analysis and security selection.  They typically favor high quality companies they believe have sustainable above-average earnings growth potential and are trading below intrinsic value. Sustainable earnings growth potential is determined by fundamental analysis of a company’s financial trends; products and services; industry position and conditions; and other factors including portfolio managers’ assessment of company management. The portfolio managers seek to manage individual security risk through analysis of each security’s risk/reward potential and to manage portfolio risk by constructing a portfolio of what they believe to be attractively valued growth companies.  The portfolio managers may sell a security when its fundamentals deteriorate, when its valuation is no longer attractive, or when other securities are identified to displace a current holding.  The portfolio managers may also consider financially material environmental, social and governance (“ESG”) factors in evaluating an issuer.  These considerations may be taken into account alongside other fundamental research in the investment selection process.

Strategy Portfolio Concentration rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests in common stocks of approximately 20 to 35 companies, primarily with large market capitalizations. The Fund will normally invest in common stocks of companies having market capitalizations that rank among the top 1,000 U.S. companies. The Fund may invest in U.S. 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) and in publicly traded real estate investment trusts (“REITs”). The Fund is “non-diversified” and may invest, a greater percentage of its assets in the securities of a single issuer than a “diversified” fund.
Risk rr_RiskHeading Principal Risks
Risk Narrative rr_RiskNarrativeTextBlock

Market Risk.  The value of investments held by the Fund may increase or decrease in response to social, economic, political, financial, public health crises or other disruptive events (whether real, expected or perceived) in the U.S. and global markets and include events such as war, natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest. These events may negatively impact broad segments of businesses and populations and may exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in reaction to changing market conditions.  Monetary and/or fiscal actions taken by U.S. or foreign governments to stimulate or stabilize the global economy may not be effective and could lead to high market volatility.

Equity Securities Risk. The value of equity securities and related instruments 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, which are more significant in a focused fund that invests in a limited number of securities; unexpected trading activity among retail investors; or other factors. Market conditions may affect certain types of stocks to a greater extent than other types of stocks.  If the stock market declines in value, the value of the Fund’s equity securities will also likely decline.  Although prices can rebound, there is no assurance that values will return to previous levels.

Issuer Non-Diversification Risk. The Fund is “non-diversified,” which means it may invest a greater percentage of its assets in the securities of a single issuer than a fund that is “diversified.” Non-diversified funds may focus their investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be, and the value of the Fund's shares may be more volatile than the values of shares of more diversified funds.

Large-Cap Growth Risk. Because the Fund normally invests primarily in stocks of large-cap growth companies, it is subject to the risk of underperforming the overall stock market during periods in which stocks of such companies are out of favor and generate lower returns than the market as a whole.

Foreign Investment Risk. Foreign investments can be adversely affected by political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country against a particular country or countries, organizations, entities and/or individuals. There may be less publicly available information about foreign issuers because they may not be subject to reporting practices, requirements or regulations comparable to those to which United States companies are subject.  Adverse changes in investment regulations, capital requirements or exchange controls could adversely affect the value of the Fund's investments.  Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States and, as a result, Fund share values may be more volatile. Trading in foreign markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country.  Depositary receipts are subject to many of the risks associated with investing directly in foreign instruments.

Currency Risk.  Exchange rates for currencies fluctuate daily.  The value of foreign investments may be affected favorably or unfavorably by changes in currency exchange rates in relation to the U.S. dollar.  Currency markets generally are not as regulated as securities markets and currency transactions are subject to settlement, custodial and other operational risks.

Real Estate Risk. Real estate investments are subject to risks associated with owning real estate, including declines in real estate values, increases in property taxes, fluctuations in interest rates, limited availability of mortgage financing, decreases in revenues from underlying real estate assets, declines in occupancy rates, changes in government regulations affecting zoning, land use, and rents, environmental liabilities, and risks related to the management skill and creditworthiness of the issuer.  Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws, among others.  REITs must satisfy specific requirements for favorable tax treatment and can involve unique risks in addition to the risks generally affecting the real estate industry. Changes in underlying real estate values may have an exaggerated effect to the extent that investments are concentrated in particular geographic regions or property types.

Sector Risk.  Because the Fund may, under certain market conditions,  invest a significant portion of its assets in one or more sectors, the value of Fund shares may be affected by events that adversely affect a particular sector and may fluctuate more than that of a fund that invests more broadly.

Liquidity Risk.  The Fund is exposed to liquidity risk when trading volume, lack of a market maker or trading partner, large position size, market conditions, or legal restrictions impair its ability to sell particular investments or to sell them at advantageous market prices.  Consequently, the Fund may have to accept a lower price to sell an investment or continue to hold it or keep the position open, sell other investments to raise cash or abandon an investment opportunity, any of which could have a negative effect on the Fund’s performance. These effects may be exacerbated during times of financial or political stress.

Risks Associated with Active Management.  The success of the Fund’s investment strategy depends on portfolio management’s successful application of analytical skills and investment judgment.  Active management involves subjective decisions and there is no guarantee that such decisions will produce the desired results or expected returns.

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.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective(s).  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.  The Fund relies on various service providers, including the investment adviser, in its operations and is susceptible to operational, information security and related events (such as public health crises, cyber or hacking attacks) that may affect the service providers or the services that they provide to the Fund.  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.

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.
Risk Nondiversified Status rr_RiskNondiversifiedStatus Issuer Non-Diversification Risk. The Fund is “non-diversified,” which means it may invest a greater percentage of its assets in the securities of a single issuer than a fund that is “diversified.” Non-diversified funds may focus their investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be, and the value of the Fund's shares may be more volatile than the values of shares of more diversified funds.
Bar Chart and Performance Table 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 compare 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 not necessarily an indication of how the Fund will perform in the future. 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 compare 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 not necessarily an indication of how the Fund will perform in the future.
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.
Annual Return Caption rr_AnnualReturnCaption Calendar year-by-year total return
Bar Chart Closing rr_BarChartClosingTextBlock

For the ten years ended December 31, 2022, the highest quarterly total return for Class A was 21.58% for the quarter ended June 30, 2020, and the lowest quarterly return was --13.05% for the quarter ended March 31, 2020.   

Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads These returns reflect a reduction to the Class A front-end sales charge effective April 29, 2022 and any applicable contingent deferred sales charge (“CDSC”) for Class C. Effective November 5, 2020, Class C shares automatically convert to Class A shares eight years after purchase. The average annual total returns listed for Class C reflect conversion to Class A shares after eight years. Prior to November 5, 2020, Class C shares automatically converted to Class A shares ten years after purchase.
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 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 a reduction to the Class A front-end sales charge effective April 29, 2022 and any applicable contingent deferred sales charge (“CDSC”) for Class C. Effective November 5, 2020, Class C shares automatically convert to Class A shares eight years after purchase. The average annual total returns listed for Class C reflect conversion to Class A shares after eight years. Prior to November 5, 2020, Class C shares automatically converted to Class A shares ten years after purchase. 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 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.

Average Annual Return, Caption rr_AverageAnnualReturnCaption Average Annual Total Return as of December 31, 2022
Eaton Vance Atlanta Capital Focused Growth Fund | Russell 1000® Growth Index  
Prospectus [Line Items] rr_ProspectusLineItems  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
One Year rr_AverageAnnualReturnYear01 (29.14%)
Five Years rr_AverageAnnualReturnYear05 10.95%
Ten Years rr_AverageAnnualReturnYear10 14.09%
Eaton Vance Atlanta Capital Focused Growth Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.25%
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.65%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.13%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.03%
1 Year rr_ExpenseExampleYear01 $ 625
3 Years rr_ExpenseExampleYear03 836
5 Years rr_ExpenseExampleYear05 1,064
10 Years rr_ExpenseExampleYear10 1,718
1 Year rr_ExpenseExampleNoRedemptionYear01 625
3 Years rr_ExpenseExampleNoRedemptionYear03 836
5 Years rr_ExpenseExampleNoRedemptionYear05 1,064
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,718
2013 rr_AnnualReturn2013 26.85%
2014 rr_AnnualReturn2014 8.40%
2015 rr_AnnualReturn2015 2.55%
2016 rr_AnnualReturn2016 3.15%
2017 rr_AnnualReturn2017 27.09%
2018 rr_AnnualReturn2018 8.55%
2019 rr_AnnualReturn2019 38.09%
2020 rr_AnnualReturn2020 26.95%
2021 rr_AnnualReturn2021 30.09%
2022 rr_AnnualReturn2022 (20.43%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest quarterly total return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 21.58%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (13.05%)
One Year rr_AverageAnnualReturnYear01 (24.59%)
Five Years rr_AverageAnnualReturnYear05 13.28%
Ten Years rr_AverageAnnualReturnYear10 13.17%
Eaton Vance Atlanta Capital Focused Growth Fund | Class A | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
One Year rr_AverageAnnualReturnYear01 (24.63%)
Five Years rr_AverageAnnualReturnYear05 12.51%
Ten Years rr_AverageAnnualReturnYear10 10.75%
Eaton Vance Atlanta Capital Focused Growth Fund | Class A | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
One Year rr_AverageAnnualReturnYear01 (14.52%)
Five Years rr_AverageAnnualReturnYear05 10.88%
Ten Years rr_AverageAnnualReturnYear10 10.15%
Eaton Vance Atlanta Capital Focused Growth Fund | Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
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 1.00%
Management Fees rr_ManagementFeesOverAssets 0.65%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.13%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.78%
1 Year rr_ExpenseExampleYear01 $ 281
3 Years rr_ExpenseExampleYear03 560
5 Years rr_ExpenseExampleYear05 964
10 Years rr_ExpenseExampleYear10 1,897
1 Year rr_ExpenseExampleNoRedemptionYear01 181
3 Years rr_ExpenseExampleNoRedemptionYear03 560
5 Years rr_ExpenseExampleNoRedemptionYear05 964
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,897
One Year rr_AverageAnnualReturnYear01 (21.79%)
Five Years rr_AverageAnnualReturnYear05 13.66%
Ten Years rr_AverageAnnualReturnYear10 13.10%
Eaton Vance Atlanta Capital Focused Growth Fund | Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
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 0.65%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.13%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.78%
1 Year rr_ExpenseExampleYear01 $ 80
3 Years rr_ExpenseExampleYear03 249
5 Years rr_ExpenseExampleYear05 433
10 Years rr_ExpenseExampleYear10 966
1 Year rr_ExpenseExampleNoRedemptionYear01 80
3 Years rr_ExpenseExampleNoRedemptionYear03 249
5 Years rr_ExpenseExampleNoRedemptionYear05 433
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 966
One Year rr_AverageAnnualReturnYear01 (20.27%)
Five Years rr_AverageAnnualReturnYear05 14.77%
Ten Years rr_AverageAnnualReturnYear10 14.06%
Eaton Vance Atlanta Capital Select Equity Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return rr_RiskReturnHeading Eaton Vance Atlanta Capital Select Equity Fund
Objective rr_ObjectiveHeading Investment Objective
Objective, Primary rr_ObjectivePrimaryTextBlock

The Fund's investment objective is to seek long-term capital growth.

Expense 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, hold and sell shares of the Fund.  Investors may also pay commissions or other fees to their financial intermediary, which are not reflected below.  You may qualify for a reduced sales charge on purchases of Class A shares if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds. Certain financial intermediaries also may offer variations in Fund sales charges to their customers as described in Appendix A – Financial Intermediary Sales Charge Variations in this Prospectus. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 31 of this Prospectus and page 24 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 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  9%  of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 9.00%
Expense Breakpoint Discounts rr_ExpenseBreakpointDiscounts You may qualify for a reduced sales charge on purchases of Class A shares if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds. Certain financial intermediaries also may offer variations in Fund sales charges to their customers as described in Appendix A – Financial Intermediary Sales Charge Variations in this Prospectus. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 31 of this Prospectus and page 24 of the Fund’s Statement of Additional Information.
Expense Breakpoint, Minimum Investment Required rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example 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, that the operating expenses remain the same and that any expense reimbursement arrangement remains in place for the contractual period.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy rr_StrategyHeading Principal Investment Strategies
Strategy Narrative rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities (the “80% Policy”). The Fund normally invests in approximately 25 to 40 companies. The Fund may invest in companies across a broad capitalization range, including smaller companies, but primarily invests in mid- to large-cap companies with capitalizations comparable to those companies included in the Russell 1000® Index. Although it invests primarily in U.S.-traded securities (including depositary receipts evidencing ownership in underlying foreign stocks), the Fund may invest up to 25% of its total assets in foreign securities, including those trading in developed and emerging markets, and may invest in publicly traded real estate investment trusts (“REITs”). The Fund may invest in exchange-traded funds (“ETFs”), a type of pooled investment vehicle, in order to manage cash positions or seek exposure to certain markets or market sectors. The Fund is “non-diversified” and may invest a greater percentage of its assets in the securities of a single issuer than a “diversified” fund.

Through investment in high quality companies, the portfolio management team seeks to build a portfolio that may participate in rising markets while minimizing participation in declining markets.  Quality is determined by analysis of a company’s financial statements and is measured by a company’s demonstrated ability to consistently grow earnings over the long-term. The portfolio managers believe high quality companies typically have strong balance sheets, sustainable cash flow, enduring competitive advantages, long product cycles, and stable demand over a business cycle, among other characteristics.  The portfolio managers may utilize “financial quality rankings” provided by nationally recognized rating services as additional information.

The portfolio managers are responsible for fundamental analysis and security selection.  They typically seek to purchase stocks of companies they believe are capable of sustaining consistent earnings and operating cash flow growth while maintaining a strong financial condition.  Portfolio managers tend to favor companies with shareholder-oriented management teams and business models that may provide consistent demand over a business cycle along with high barriers to entry. Investments are determined based primarily on fundamental analysis of a company’s financial trends, products and services and other factors including portfolio managers’ assessment of company management. The portfolio managers seek to manage portfolio risk by constructing a diversified portfolio of what they believe to be attractively valued companies.  The portfolio managers may sell a security when its fundamentals deteriorate, when it is no longer attractively valued, or when other securities are identified to displace a current holding.

Strategy Portfolio Concentration rr_StrategyPortfolioConcentration Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities (the “80% Policy”). The Fund normally invests in approximately 25 to 40 companies. The Fund may invest in companies across a broad capitalization range, including smaller companies, but primarily invests in mid- to large-cap companies with capitalizations comparable to those companies included in the Russell 1000® Index. Although it invests primarily in U.S.-traded securities (including depositary receipts evidencing ownership in underlying foreign stocks), the Fund may invest up to 25% of its total assets in foreign securities, including those trading in developed and emerging markets, and may invest in publicly traded real estate investment trusts (“REITs”). The Fund may invest in exchange-traded funds (“ETFs”), a type of pooled investment vehicle, in order to manage cash positions or seek exposure to certain markets or market sectors. The Fund is “non-diversified” and may invest a greater percentage of its assets in the securities of a single issuer than a “diversified” fund.
Risk rr_RiskHeading Principal Risks
Risk Narrative rr_RiskNarrativeTextBlock

Market Risk.  The value of investments held by the Fund may increase or decrease in response to social, economic, political, financial, public health crises or other disruptive events (whether real, expected or perceived) in the U.S. and global markets and include events such as war, natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest. These events may negatively impact broad segments of businesses and populations and may exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in reaction to changing market conditions.  Monetary and/or fiscal actions taken by U.S. or foreign governments to stimulate or stabilize the global economy may not be effective and could lead to high market volatility.

Equity Securities Risk. The value of equity securities and related instruments 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, which are more significant in a focused fund that invests in a limited number of securities; unexpected trading activity among retail investors; or other factors. Market conditions may affect certain types of stocks to a greater extent than other types of stocks.  If the stock market declines in value, the value of the Fund’s equity securities will also likely decline.  Although prices can rebound, there is no assurance that values will return to previous levels.

Issuer Non-Diversification Risk. The Fund is “non-diversified,” which means it may invest a greater percentage of its assets in the securities of a single issuer than a fund that is “diversified.” Non-diversified funds may focus their investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be, and the value of the Fund's shares may be more volatile than the values of shares of more diversified funds.

Smaller and Mid-Sized Company Risk.  The stocks of smaller and mid-sized 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. Such 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.  Stocks of these companies frequently have lower trading volumes making them more volatile and potentially less liquid and more difficult to value.

Foreign Investment Risk. Foreign investments can be adversely affected by political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country against a particular country or countries, organizations, entities and/or individuals. There may be less publicly available information about foreign issuers because they may not be subject to reporting practices, requirements or regulations comparable to those to which United States companies are subject.  Adverse changes in investment regulations, capital requirements or exchange controls could adversely affect the value of the Fund's investments.  Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States and, as a result, Fund share values may be more volatile. Trading in foreign markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country.  Depositary receipts are subject to many of the risks associated with investing directly in foreign instruments.

Emerging Markets Investment Risk.  Investment markets within emerging market countries are typically smaller, less liquid, less developed and more volatile than those in more developed markets like the United States, and may be focused in certain sectors.  Emerging market securities often involve greater risks than developed market securities. The information available about an emerging market issuer may be less reliable than for comparable issuers in more developed capital markets.

Currency Risk.  Exchange rates for currencies fluctuate daily.  The value of foreign investments may be affected favorably or unfavorably by changes in currency exchange rates in relation to the U.S. dollar.  Currency markets generally are not as regulated as securities markets and currency transactions are subject to settlement, custodial and other operational risks.

Real Estate Risk. Real estate investments are subject to risks associated with owning real estate, including declines in real estate values, increases in property taxes, fluctuations in interest rates, limited availability of mortgage financing, decreases in revenues from underlying real estate assets, declines in occupancy rates, changes in government regulations affecting zoning, land use, and rents, environmental liabilities, and risks related to the management skill and creditworthiness of the issuer.  Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws, among others.  REITs must satisfy specific requirements for favorable tax treatment and can involve unique risks in addition to the risks generally affecting the real estate industry. Changes in underlying real estate values may have an exaggerated effect to the extent that investments are concentrated in particular geographic regions or property types.

Sector Risk.  Because the Fund may, under certain market conditions,  invest a significant portion of its assets in one or more sectors, the value of Fund shares may be affected by events that adversely affect a particular sector and may fluctuate more than that of a fund that invests more broadly.

ETF Risk.  ETFs are subject to the risks of investing in the underlying securities or other investments. 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 a possible delay in recovery of the loaned securities or a possible loss of rights in the collateral if the borrower fails financially.  The Fund could also lose money if the value of the collateral decreases.

Liquidity Risk.  The Fund is exposed to liquidity risk when trading volume, lack of a market maker or trading partner, large position size, market conditions, or legal restrictions impair its ability to sell particular investments or to sell them at advantageous market prices.  Consequently, the Fund may have to accept a lower price to sell an investment or continue to hold it or keep the position open, sell other investments to raise cash or abandon an investment opportunity, any of which could have a negative effect on the Fund’s performance. These effects may be exacerbated during times of financial or political stress.

Risks Associated with Active Management.  The success of the Fund’s investment strategy depends on portfolio management’s successful application of analytical skills and investment judgment.  Active management involves subjective decisions and there is no guarantee that such decisions will produce the desired results or expected returns.

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.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective(s).  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.  The Fund relies on various service providers, including the investment adviser, in its operations and is susceptible to operational, information security and related

events (such as public health crises, cyber or hacking attacks) that may affect the service providers or .the services that they provide to the Fund.  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.

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.
Risk Nondiversified Status rr_RiskNondiversifiedStatus Issuer Non-Diversification Risk. The Fund is “non-diversified,” which means it may invest a greater percentage of its assets in the securities of a single issuer than a fund that is “diversified.” Non-diversified funds may focus their investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be, and the value of the Fund's shares may be more volatile than the values of shares of more diversified funds.
Bar Chart and Performance Table 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 compare 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 not necessarily an indication of how the Fund will perform in the future. 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 compare 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 not necessarily an indication of how the Fund will perform in the future.
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.
Annual Return Caption rr_AnnualReturnCaption Calendar year-by-year total return
Bar Chart Closing rr_BarChartClosingTextBlock

For the ten years ended December 31, 2022, the highest quarterly total return for Class A was 16.18% for the quarter ended March 31, 2019, and the lowest quarterly return was -17.51% for the quarter ended March 31, 2020.

Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads These returns reflect a reduction to the Class A front-end sales charge effective April 29, 2022 and any applicable contingent deferred sales charge (“CDSC”) for Class C. Effective November 5, 2020, Class C shares automatically convert to Class A shares eight years after purchase. The average annual total returns listed for Class C reflect conversion to Class A shares after eight years. Prior to November 5, 2020, Class C shares automatically converted to Class A shares ten years after purchase.
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 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 rr_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod The Class C performance shown above for the period prior to March 19, 2013 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in expenses of the two classes. The Class R6 performance shown above for the period prior to February 1, 2017 (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 rr_PerformanceTableClosingTextBlock

These returns reflect a reduction to the Class A front-end sales charge effective April 29, 2022 and any applicable contingent deferred sales charge (“CDSC”) for Class C. Effective November 5, 2020, Class C shares automatically convert to Class A shares eight years after purchase. The average annual total returns listed for Class C reflect conversion to Class A shares after eight years. Prior to November 5, 2020, Class C shares automatically converted to Class A shares ten years after purchase. Class A and Class I commenced operations on January 3, 2012 and Class R6 commenced operations on February 1, 2017.  The Class C performance shown above for the period prior to March 19, 2013 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in expenses of the two classes. The Class R6 performance shown above for the period prior to February 1, 2017 (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 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.

Average Annual Return, Caption rr_AverageAnnualReturnCaption Average Annual Total Return as of December 31, 2022
Eaton Vance Atlanta Capital Select Equity Fund | Russell 1000® Index  
Prospectus [Line Items] rr_ProspectusLineItems  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
One Year rr_AverageAnnualReturnYear01 (19.13%)
Five Years rr_AverageAnnualReturnYear05 9.13%
Ten Years Ten Years rr_AverageAnnualReturnSinceInception 12.37%
Eaton Vance Atlanta Capital Select Equity Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.25%
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOfferingPrice none [2]
Management Fees rr_ManagementFeesOverAssets 0.69%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.04%
1 Year rr_ExpenseExampleYear01 $ 625
3 Years rr_ExpenseExampleYear03 839
5 Years rr_ExpenseExampleYear05 1,069
10 Years rr_ExpenseExampleYear10 1,729
1 Year rr_ExpenseExampleNoRedemptionYear01 625
3 Years rr_ExpenseExampleNoRedemptionYear03 839
5 Years rr_ExpenseExampleNoRedemptionYear05 1,069
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,729
2013 rr_AnnualReturn2013 29.30%
2014 rr_AnnualReturn2014 11.35%
2015 rr_AnnualReturn2015 2.57%
2016 rr_AnnualReturn2016 5.61%
2017 rr_AnnualReturn2017 38.13%
2018 rr_AnnualReturn2018 (0.63%)
2019 rr_AnnualReturn2019 38.13%
2020 rr_AnnualReturn2020 15.54%
2021 rr_AnnualReturn2021 15.22%
2022 rr_AnnualReturn2022 (12.28%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest quarterly total return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.51%)
One Year rr_AverageAnnualReturnYear01 (16.88%)
Five Years rr_AverageAnnualReturnYear05 8.72%
Ten Years Ten Years rr_AverageAnnualReturnSinceInception 10.96%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 03, 2012
Eaton Vance Atlanta Capital Select Equity Fund | Class A | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
One Year rr_AverageAnnualReturnYear01 (17.88%)
Five Years rr_AverageAnnualReturnYear05 7.76%
Ten Years Ten Years rr_AverageAnnualReturnSinceInception 10.30%
Eaton Vance Atlanta Capital Select Equity Fund | Class A | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
One Year rr_AverageAnnualReturnYear01 (8.91%)
Five Years rr_AverageAnnualReturnYear05 7.09%
Ten Years Ten Years rr_AverageAnnualReturnSinceInception 9.29%
Eaton Vance Atlanta Capital Select Equity Fund | Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
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 1.00%
Management Fees rr_ManagementFeesOverAssets 0.69%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.79%
1 Year rr_ExpenseExampleYear01 $ 282
3 Years rr_ExpenseExampleYear03 563
5 Years rr_ExpenseExampleYear05 970
10 Years rr_ExpenseExampleYear10 1,908
1 Year rr_ExpenseExampleNoRedemptionYear01 182
3 Years rr_ExpenseExampleNoRedemptionYear03 563
5 Years rr_ExpenseExampleNoRedemptionYear05 970
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,908
One Year rr_AverageAnnualReturnYear01 (13.75%)
Five Years rr_AverageAnnualReturnYear05 9.07%
Ten Years Ten Years rr_AverageAnnualReturnSinceInception 10.13%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 19, 2013
Eaton Vance Atlanta Capital Select Equity Fund | Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
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 0.69%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.79%
1 Year rr_ExpenseExampleYear01 $ 81
3 Years rr_ExpenseExampleYear03 252
5 Years rr_ExpenseExampleYear05 439
10 Years rr_ExpenseExampleYear10 978
1 Year rr_ExpenseExampleNoRedemptionYear01 81
3 Years rr_ExpenseExampleNoRedemptionYear03 252
5 Years rr_ExpenseExampleNoRedemptionYear05 439
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 978
One Year rr_AverageAnnualReturnYear01 (12.08%)
Five Years rr_AverageAnnualReturnYear05 10.17%
Ten Years Ten Years rr_AverageAnnualReturnSinceInception 11.84%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 03, 2012
Eaton Vance Atlanta Capital Select Equity Fund | Class R6  
Prospectus [Line Items] rr_ProspectusLineItems  
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 0.69%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.05%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.74%
1 Year rr_ExpenseExampleYear01 $ 76
3 Years rr_ExpenseExampleYear03 237
5 Years rr_ExpenseExampleYear05 411
10 Years rr_ExpenseExampleYear10 918
1 Year rr_ExpenseExampleNoRedemptionYear01 76
3 Years rr_ExpenseExampleNoRedemptionYear03 237
5 Years rr_ExpenseExampleNoRedemptionYear05 411
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 918
One Year rr_AverageAnnualReturnYear01 (12.02%)
Five Years rr_AverageAnnualReturnYear05 10.22%
Ten Years Ten Years rr_AverageAnnualReturnSinceInception 11.87%
Inception Date rr_AverageAnnualReturnInceptionDate Feb. 01, 2017
Eaton Vance Atlanta Capital SMID-Cap Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return rr_RiskReturnHeading Eaton Vance Atlanta Capital SMID-Cap Fund
Objective rr_ObjectiveHeading Investment Objective
Objective, Primary rr_ObjectivePrimaryTextBlock

The Fund's investment objective is to seek long-term capital growth.

Expense 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, hold and sell shares of the Fund.  Investors may also pay commissions or other fees to their financial intermediary, which are not reflected below.  You may qualify for a reduced sales charge on purchases of Class A shares if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds. Certain financial intermediaries also may offer variations in Fund sales charges to their customers as described in Appendix A – Financial Intermediary Sales Charge Variations in this Prospectus. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 31 of this Prospectus and page 24 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 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  7%  of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 7.00%
Expense Breakpoint Discounts rr_ExpenseBreakpointDiscounts You may qualify for a reduced sales charge on purchases of Class A shares if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds. Certain financial intermediaries also may offer variations in Fund sales charges to their customers as described in Appendix A – Financial Intermediary Sales Charge Variations in this Prospectus. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 31 of this Prospectus and page 24 of the Fund’s Statement of Additional Information.
Expense Breakpoint, Minimum Investment Required rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example 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, that the operating expenses remain the same and that any expense reimbursement arrangement remains in place for the contractual period.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy rr_StrategyHeading Principal Investment Strategies
Strategy Narrative rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in small- to mid-cap stocks (the “80% Policy”). The portfolio managers generally consider small- to mid-cap companies to be those companies having market capitalizations within the range of companies comprising the Russell 2500TM Index. The Fund may also invest in larger companies, U.S. 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) and publicly traded real estate investment trusts (“REITs”). The Fund may invest in exchange traded funds (“ETFs”), a type of pooled investment vehicle, in order to manage cash positions or seek exposure to certain markets or market sectors.

Through investment in high quality companies, the portfolio management team seeks to build a portfolio that may participate in rising markets while minimizing participation in declining markets.  Quality is determined by analysis of a company’s financial statements and is measured by a company’s demonstrated ability to consistently grow earnings over the long-term. The portfolio managers believe high quality companies typically have strong balance sheets, sustainable cash flow, enduring competitive advantages, long product cycles, and stable demand over a business cycle, among other characteristics.  The portfolio managers also may utilize “financial quality rankings” provided by nationally recognized rating services when determining quality.

The portfolio managers are responsible for fundamental analysis and security selection.  They typically seek to purchase stocks of companies they believe are capable of sustaining consistent earnings and operating cash flow growth while maintaining a strong financial condition.  Portfolio managers tend to favor companies with shareholder-oriented management teams and business models that may provide consistent demand over a business cycle along with high barriers to entry. Investments are determined based primarily on fundamental analysis of a company’s financial trends, products and services and other factors including portfolio managers’ assessment of company management. The portfolio managers seek to manage portfolio risk by constructing a diversified portfolio of what they believe to be attractively valued companies.  The portfolio managers may sell a security when its fundamentals deteriorate or when it is no longer attractively valued, or when other securities are identified to displace a current holding.

Strategy Portfolio Concentration rr_StrategyPortfolioConcentration Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in small- to mid-cap stocks (the “80% Policy”). The portfolio managers generally consider small- to mid-cap companies to be those companies having market capitalizations within the range of companies comprising the Russell 2500TM Index. The Fund may also invest in larger companies, U.S. 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) and publicly traded real estate investment trusts (“REITs”). The Fund may invest in exchange traded funds (“ETFs”), a type of pooled investment vehicle, in order to manage cash positions or seek exposure to certain markets or market sectors.
Risk rr_RiskHeading Principal Risks
Risk Narrative rr_RiskNarrativeTextBlock

Market Risk.  The value of investments held by the Fund may increase or decrease in response to social, economic, political, financial, public health crises or other disruptive events (whether real, expected or perceived) in the U.S. and global markets and include events such as war, natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest. These events may negatively impact broad segments of businesses and populations and may exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in reaction to changing market conditions.  Monetary and/or fiscal actions taken by U.S. or foreign governments to stimulate or stabilize the global economy may not be effective and could lead to high market volatility.

Equity Securities Risk. The value of equity securities and related instruments 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; unexpected trading activity among retail investors; or other factors. Market conditions may affect certain types of stocks to a greater extent than other types of stocks.  If the stock market declines in value, the value of the Fund’s equity securities will also likely decline.  Although prices can rebound, there is no assurance that values will return to previous levels.

Smaller and Mid-Sized Company Risk.  The stocks of smaller and mid-sized 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. Such 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.  Stocks of these companies frequently have lower trading volumes making them more volatile and potentially less liquid and more difficult to value.

Foreign Investment Risk. Foreign investments can be adversely affected by political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country against a particular country or countries, organizations, entities and/or individuals. There may be less publicly available information about foreign issuers because they may not be subject to reporting practices, requirements or regulations comparable to those to which United States companies are subject.  Adverse changes in investment regulations, capital

requirements or exchange controls could adversely affect the value of the Fund's investments.  Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States and, as a result, Fund share values may be more volatile. Trading in foreign markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country.  Depositary receipts are subject to many of the risks associated with investing directly in foreign instruments.

ETF Risk.  ETFs are subject to the risks of investing in the underlying securities or other investments. 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.  

Real Estate Risk. Real estate investments are subject to risks associated with owning real estate, including declines in real estate values, increases in property taxes, fluctuations in interest rates, limited availability of mortgage financing, decreases in revenues from underlying real estate assets, declines in occupancy rates, changes in government regulations affecting zoning, land use, and rents, environmental liabilities, and risks related to the management skill and creditworthiness of the issuer.  Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws, among others.  REITs must satisfy specific requirements for favorable tax treatment and can involve unique risks in addition to the risks generally affecting the real estate industry. Changes in underlying real estate values may have an exaggerated effect to the extent that investments are concentrated in particular geographic regions or property types.

Sector Risk.  Because the Fund may, under certain market conditions, invest a significant portion of its assets in one or more sectors, the value of Fund shares may be affected by events that adversely affect a particular sector and may fluctuate more than that of a fund that invests more broadly.

Securities Lending Risk. Securities lending involves a possible delay in recovery of the loaned securities or a possible loss of rights in the collateral if the borrower fails financially.  The Fund could also lose money if the value of the collateral decreases.

Liquidity Risk.  The Fund is exposed to liquidity risk when trading volume, lack of a market maker or trading partner, large position size, market conditions, or legal restrictions impair its ability to sell particular investments or to sell them at advantageous market prices.  Consequently, the Fund may have to accept a lower price to sell an investment or continue to hold it or keep the position open, sell other investments to raise cash or abandon an investment opportunity, any of which could have a negative effect on the Fund’s performance. These effects may be exacerbated during times of financial or political stress.

Risks Associated with Active Management.  The success of the Fund’s investment strategy depends on portfolio management’s successful application of analytical skills and investment judgment.  Active management involves subjective decisions and there is no guarantee that such decisions will produce the desired results or expected returns.

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.  Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective(s).  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.  The Fund relies on various service providers, including the investment adviser, in its operations and is susceptible to operational, information security and related events (such as public health crises, cyber or hacking attacks) that may affect the service providers or the services that they provide to the Fund.  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.

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.
Bar Chart and Performance Table 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 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 not necessarily an indication of how the Fund will perform in the future. The Fund’s performance reflects the effects of expense reductions for certain periods.  Absent these reductions, performance for certain periods 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 compare with those of two broad-based securities market indices.
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 not necessarily an indication of how the Fund will perform in the future.
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.
Annual Return Caption rr_AnnualReturnCaption Calendar year-by-year total return
Bar Chart Closing rr_BarChartClosingTextBlock

For the ten years ended December 31, 2022, the highest quarterly total return for Class A was 22.17% for the quarter ended June 30, 2020, and the lowest quarterly return was -27.33% for the quarter ended March 31, 2020.

Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads These returns reflect a reduction to the Class A front-end sales charge effective April 29, 2022 and any applicable contingent deferred sales charge (“CDSC”) for Class C. Effective November 5, 2020, Class C shares automatically convert to Class A shares eight years after purchase. The average annual total returns listed for Class C reflect conversion to Class A shares after eight years. Prior to November 5, 2020, Class C shares automatically converted to Class A shares ten years after purchase.
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 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 rr_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod 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 rr_PerformanceTableClosingTextBlock

These returns reflect a reduction to the Class A front-end sales charge effective April 29, 2022 and any applicable contingent deferred sales charge (“CDSC”) for Class C. Effective November 5, 2020, Class C shares automatically convert to Class A shares eight years after purchase. The average annual total returns listed for Class C reflect conversion to Class A shares after eight years. Prior to November 5, 2020, Class C shares automatically converted to Class A shares ten years after purchase. 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 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.

Average Annual Return, Caption rr_AverageAnnualReturnCaption Average Annual Total Return as of December 31, 2022
Eaton Vance Atlanta Capital SMID-Cap Fund | Russell 2500TM Index  
Prospectus [Line Items] rr_ProspectusLineItems  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
One Year rr_AverageAnnualReturnYear01 (18.37%)
Five Years rr_AverageAnnualReturnYear05 5.88%
Ten Years rr_AverageAnnualReturnYear10 10.02%
Eaton Vance Atlanta Capital SMID-Cap Fund | Russell 2000® Index  
Prospectus [Line Items] rr_ProspectusLineItems  
Index No Deduction for Fees, Expenses, Taxes rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
One Year rr_AverageAnnualReturnYear01 (20.44%)
Five Years rr_AverageAnnualReturnYear05 4.12%
Ten Years rr_AverageAnnualReturnYear10 9.01%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.25%
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOfferingPrice none [3]
Management Fees rr_ManagementFeesOverAssets 0.79%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.14%
1 Year rr_ExpenseExampleYear01 $ 635
3 Years rr_ExpenseExampleYear03 868
5 Years rr_ExpenseExampleYear05 1,120
10 Years rr_ExpenseExampleYear10 1,838
1 Year rr_ExpenseExampleNoRedemptionYear01 635
3 Years rr_ExpenseExampleNoRedemptionYear03 868
5 Years rr_ExpenseExampleNoRedemptionYear05 1,120
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,838
2013 rr_AnnualReturn2013 35.72%
2014 rr_AnnualReturn2014 4.90%
2015 rr_AnnualReturn2015 9.46%
2016 rr_AnnualReturn2016 10.96%
2017 rr_AnnualReturn2017 24.42%
2018 rr_AnnualReturn2018 (5.57%)
2019 rr_AnnualReturn2019 34.10%
2020 rr_AnnualReturn2020 10.95%
2021 rr_AnnualReturn2021 21.92%
2022 rr_AnnualReturn2022 (9.03%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest quarterly total return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 22.17%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (27.33%)
One Year rr_AverageAnnualReturnYear01 (13.81%)
Five Years rr_AverageAnnualReturnYear05 8.10%
Ten Years rr_AverageAnnualReturnYear10 12.25%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class A | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
One Year rr_AverageAnnualReturnYear01 (15.65%)
Five Years rr_AverageAnnualReturnYear05 6.05%
Ten Years rr_AverageAnnualReturnYear10 10.70%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class A | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
One Year rr_AverageAnnualReturnYear01 (6.18%)
Five Years rr_AverageAnnualReturnYear05 6.47%
Ten Years rr_AverageAnnualReturnYear10 10.23%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
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 1.00%
Management Fees rr_ManagementFeesOverAssets 0.79%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.89%
1 Year rr_ExpenseExampleYear01 $ 292
3 Years rr_ExpenseExampleYear03 594
5 Years rr_ExpenseExampleYear05 1,021
10 Years rr_ExpenseExampleYear10 2,016
1 Year rr_ExpenseExampleNoRedemptionYear01 192
3 Years rr_ExpenseExampleNoRedemptionYear03 594
5 Years rr_ExpenseExampleNoRedemptionYear05 1,021
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,016
One Year rr_AverageAnnualReturnYear01 (10.50%)
Five Years rr_AverageAnnualReturnYear05 8.46%
Ten Years rr_AverageAnnualReturnYear10 12.18%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
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 0.79%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.09%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.88%
1 Year rr_ExpenseExampleYear01 $ 90
3 Years rr_ExpenseExampleYear03 281
5 Years rr_ExpenseExampleYear05 488
10 Years rr_ExpenseExampleYear10 1,084
1 Year rr_ExpenseExampleNoRedemptionYear01 90
3 Years rr_ExpenseExampleNoRedemptionYear03 281
5 Years rr_ExpenseExampleNoRedemptionYear05 488
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,084
One Year rr_AverageAnnualReturnYear01 (8.81%)
Five Years rr_AverageAnnualReturnYear05 9.54%
Ten Years rr_AverageAnnualReturnYear10 13.13%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class R  
Prospectus [Line Items] rr_ProspectusLineItems  
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 0.79%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.39%
1 Year rr_ExpenseExampleYear01 $ 142
3 Years rr_ExpenseExampleYear03 440
5 Years rr_ExpenseExampleYear05 761
10 Years rr_ExpenseExampleYear10 1,669
1 Year rr_ExpenseExampleNoRedemptionYear01 142
3 Years rr_ExpenseExampleNoRedemptionYear03 440
5 Years rr_ExpenseExampleNoRedemptionYear05 761
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,669
One Year rr_AverageAnnualReturnYear01 (9.26%)
Five Years rr_AverageAnnualReturnYear05 9.00%
Ten Years rr_AverageAnnualReturnYear10 12.57%
Eaton Vance Atlanta Capital SMID-Cap Fund | Class R6  
Prospectus [Line Items] rr_ProspectusLineItems  
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 0.79%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.82%
1 Year rr_ExpenseExampleYear01 $ 84
3 Years rr_ExpenseExampleYear03 262
5 Years rr_ExpenseExampleYear05 455
10 Years rr_ExpenseExampleYear10 1,014
1 Year rr_ExpenseExampleNoRedemptionYear01 84
3 Years rr_ExpenseExampleNoRedemptionYear03 262
5 Years rr_ExpenseExampleNoRedemptionYear05 455
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,014
One Year rr_AverageAnnualReturnYear01 (8.76%)
Five Years rr_AverageAnnualReturnYear05 9.63%
Ten Years rr_AverageAnnualReturnYear10 13.22%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 01, 2014
[1] Class A shares purchased at net asset value in amounts of $1 million or more are subject to a 1.00% contingent deferred sales charge if redeemed within 12 months of purchase.
[2] Class A shares purchased at net asset value in amounts of $1 million or more are subject to a 1.00% contingent deferred sales charge if redeemed within 12 months of purchase.
[3] Class A shares purchased at net asset value in amounts of $1 million or more are subject to a 1.00% contingent deferred sales charge if redeemed within 12 months of purchase.