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Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName EATON VANCE GROWTH TRUST
Prospectus Date rr_ProspectusDate Jul. 01, 2012
Eaton Vance Focused Value Opportunities Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Eaton Vance Focused Value Opportunities Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund’s investment objective is total return.
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 17 of this Prospectus and page 20 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)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination June 30, 2013
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 fiscal period (from the commencement of operations on March 7, 2011 through February 29, 2012), the Fund's portfolio turnover rate was 76% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 76.00%
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 17 of this Prospectus and page 20 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:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Expenses with Redemption
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Expenses without Redemption
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock Under normal market conditions, the Fund invests primarily in large-cap companies, but may invest in common stocks of companies of any market capitalization. The portfolio managers generally consider large-cap companies to be those companies having market capitalizations equal to or greater than the median capitalization of companies included in the Russell 1000 Value Index. The Fund invests primarily in value stocks, which are common stocks that, in the opinion of the investment adviser, are inexpensive or undervalued relative to the overall stock market. The Fund generally expects to hold approximately 25 to 45 stocks. The Fund may invest up to 25% of its total assets in foreign securities and may also invest 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 invest up to 10% of its net assets in real estate investment trusts and may lend its securities.

Investment decisions are made primarily on the basis of fundamental research. The portfolio managers utilize information provided by, and the expertise of the investment adviser’s research staff in making investment decisions. In selecting securities, the portfolio managers consider (among other factors) a company’s earnings or cash flow capabilities, dividend prospects, financial strength, growth potential, the strength of the company’s business franchises and management team, sustainability of a company’s competitiveness, and estimates of the company’s net value. The portfolio managers seek to manage investment risk by utilizing fundamental analysis of risk/return characteristics in securities selection and also by using quantitative tools to assist in portfolio construction, monitoring, and maintaining issuer and industry diversification among the Fund’s holdings. The portfolio managers may sell a security when the investment adviser’s price objective for the security is reached, the fundamentals of the company deteriorate, a security’s price falls below acquisition cost or to pursue more attractive investment options.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund invests primarily in large-cap companies, but may invest in common stocks of companies of any market capitalization. The portfolio managers generally consider large-cap companies to be those companies having market capitalizations equal to or greater than the median capitalization of companies included in the Russell 1000 Value Index. The Fund invests primarily in value stocks, which are common stocks that, in the opinion of the investment adviser, are inexpensive or undervalued relative to the overall stock market. The Fund generally expects to hold approximately 25 to 45 stocks. The Fund may invest up to 25% of its total assets in foreign securities and may also invest 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 invest up to 10% of its net assets in real estate investment trusts and may 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 large-cap or value 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.

Foreign and Emerging Market Investment Risk.   Because the Fund can invest a portion of its assets in foreign instruments, the value of Fund shares can be adversely affected by changes in currency exchange rates and political, economic and market developments abroad. In emerging or less developed countries, these risks can be more significant. Investment markets in emerging market countries are typically substantially smaller, less liquid and more volatile than the major markets in developed countries. As a result, Fund share values may be more volatile than if the Fund invested only in developed markets. Emerging market countries may have relatively unstable governments and economies. Emerging market investments often are subject to speculative trading, which typically contributes to volatility. Trading in foreign and emerging 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. The value of investments denominated in foreign currencies can be adversely affected by changes in foreign currency exchange rates. Depositary receipts are subject to many of the risks associated with investing directly in foreign securities including political, economic and market risks.

Real Estate Investing Risk.  Securities of companies in the real estate industry are sensitive to factors such as changes in real estate values, property taxes, interest rates, cash flow of underlying real estate assets, occupancy rates, government regulations affecting zoning, land use, and rents, and 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 are subject to the special risks associated with investing in the real estate industry. Changes in underlying real estate values may have an exaggerated effect to the extent that REITs concentrate investments in particular geographic regions or property types.

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 investment 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 investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective. Subjective decisions made by the investment 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 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 Performance history will be available for the Fund after the Fund has been in operation for one calendar year.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance history will be available for the Fund after the Fund has been in operation for one calendar year.
Eaton Vance Focused Value Opportunities Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol EAFVX
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 time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.70%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.70%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.45%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.25%
1 Year rr_ExpenseExampleYear01 695
3 Years rr_ExpenseExampleYear03 1,039
5 Years rr_ExpenseExampleYear05 1,405
10 Years rr_ExpenseExampleYear10 2,433
1 Year rr_ExpenseExampleNoRedemptionYear01 695
3 Years rr_ExpenseExampleNoRedemptionYear03 1,039
5 Years rr_ExpenseExampleNoRedemptionYear05 1,405
10 Years rr_ExpenseExampleNoRedemptionYear10 2,433
Eaton Vance Focused Value Opportunities Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol ECFVX
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 time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.70%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.45%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.45%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 2.00%
1 Year rr_ExpenseExampleYear01 303
3 Years rr_ExpenseExampleYear03 721
5 Years rr_ExpenseExampleYear05 1,265
10 Years rr_ExpenseExampleYear10 2,752
1 Year rr_ExpenseExampleNoRedemptionYear01 203
3 Years rr_ExpenseExampleNoRedemptionYear03 721
5 Years rr_ExpenseExampleNoRedemptionYear05 1,265
10 Years rr_ExpenseExampleNoRedemptionYear10 2,752
Eaton Vance Focused Value Opportunities Fund | Class I
  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol EIFVX
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 time of purchase or redemption) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets   
Other Expenses rr_OtherExpensesOverAssets 0.70%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.45%
Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.45%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.00%
1 Year rr_ExpenseExampleYear01 102
3 Years rr_ExpenseExampleYear03 414
5 Years rr_ExpenseExampleYear05 749
10 Years rr_ExpenseExampleYear10 1,697
1 Year rr_ExpenseExampleNoRedemptionYear01 102
3 Years rr_ExpenseExampleNoRedemptionYear03 414
5 Years rr_ExpenseExampleNoRedemptionYear05 749
10 Years rr_ExpenseExampleNoRedemptionYear10 1,697
[1] The investment adviser and administrator have 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 and 1.00% for Class I shares. This expense reimbursement will continue through June 30, 2013. 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 investment adviser and administrator during the Fund's current fiscal year to the extent actual expenses are less than the contractual expense cap during such year.