Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	EATON VANCE GROWTH TRUST
Prospectus Date	rr_ProspectusDate	Jul. 01, 2012
Eaton Vance Focused Growth Opportunities Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summaries Eaton Vance Focused Growth Opportunities Fund
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund’s investment objective is to seek long-term capital growth.
Expense [Heading]	rr_ExpenseHeading	Fees and Expenses of the Fund
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds. More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 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 118% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	118.00%
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 Growth Index. 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 lend its securities. Investment decisions are made primarily on the basis of fundamental research. The Fund employs a “growth at a reasonable price” investing style, seeking to acquire growing companies that the portfolio managers believe are reasonably priced in relation to their fundamental value. The portfolio managers may seek to capitalize on market volatility and the actions of short-term investors. The portfolio managers utilize information provided by, and the expertise of the investment adviser’s research staff in making investment decisions. In selecting stocks, the portfolio managers will consider (among other factors) a company’s earnings or cash flow capabilities, 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 they believe it is fully valued, the fundamentals of a company deteriorate, a stock’s price falls below its acquisition cost, management fails to execute its strategy 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 Growth Index. 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 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 growth 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. Smaller Company Equity Risk.   The stocks of smaller, less seasoned companies are generally subject to greater price fluctuations, limited liquidity, higher transaction costs and higher investment risk. Smaller companies may have limited product lines, markets or financial resources, may be dependent on a limited management group, and may lack substantial capital reserves or an established performance record. There may be generally less publicly available information about such companies than for larger, more established companies. Securities Lending Risk.  Securities lending involves possible delay in recovery of the securities or possible loss of rights in the collateral should the borrower fail financially. As a result, the value of Fund shares may fall and there may be a delay in recovering the loaned securities. The value of Fund shares could also fall if a loan is called and the Fund is required to liquidate reinvested collateral at a loss or if the 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 Growth Opportunities Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	EAFGX
Maximum Sales Charge (Load) (as a percentage of offering price)	rr_MaximumCumulativeSalesChargeOverOfferingPrice	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	0.72%
Total Annual Fund Offering Expenses	rr_ExpensesOverAssets	1.72%
Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.47%)	[1]
Total Annual Fund Operating Expenses After Expense Reimbursement	rr_NetExpensesOverAssets	1.25%
1 Year	rr_ExpenseExampleYear01	695
3 Years	rr_ExpenseExampleYear03	1,043
5 Years	rr_ExpenseExampleYear05	1,413
10 Years	rr_ExpenseExampleYear10	2,452
1 Year	rr_ExpenseExampleNoRedemptionYear01	695
3 Years	rr_ExpenseExampleNoRedemptionYear03	1,043
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,413
10 Years	rr_ExpenseExampleNoRedemptionYear10	2,452
Eaton Vance Focused Growth Opportunities Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	ECFGX
Maximum Sales Charge (Load) (as a percentage of offering price)	rr_MaximumCumulativeSalesChargeOverOfferingPrice	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	0.72%
Total Annual Fund Offering Expenses	rr_ExpensesOverAssets	2.47%
Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.47%)	[1]
Total Annual Fund Operating Expenses After Expense Reimbursement	rr_NetExpensesOverAssets	2.00%
1 Year	rr_ExpenseExampleYear01	303
3 Years	rr_ExpenseExampleYear03	725
5 Years	rr_ExpenseExampleYear05	1,273
10 Years	rr_ExpenseExampleYear10	2,771
1 Year	rr_ExpenseExampleNoRedemptionYear01	203
3 Years	rr_ExpenseExampleNoRedemptionYear03	725
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,273
10 Years	rr_ExpenseExampleNoRedemptionYear10	2,771
Eaton Vance Focused Growth Opportunities Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	EIFGX
Maximum Sales Charge (Load) (as a percentage of offering price)	rr_MaximumCumulativeSalesChargeOverOfferingPrice	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	0.72%
Total Annual Fund Offering Expenses	rr_ExpensesOverAssets	1.47%
Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.47%)	[1]
Total Annual Fund Operating Expenses After Expense Reimbursement	rr_NetExpensesOverAssets	1.00%
1 Year	rr_ExpenseExampleYear01	102
3 Years	rr_ExpenseExampleYear03	419
5 Years	rr_ExpenseExampleYear05	758
10 Years	rr_ExpenseExampleYear10	1,717
1 Year	rr_ExpenseExampleNoRedemptionYear01	102
3 Years	rr_ExpenseExampleNoRedemptionYear03	419
5 Years	rr_ExpenseExampleNoRedemptionYear05	758
10 Years	rr_ExpenseExampleNoRedemptionYear10	1,717

[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.