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 54 of this Prospectus and page 25 of the Fund’s Statement of Additional Information.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example.

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

Under normal market conditions, the Fund invests at least 80% of its net assets in dividend-paying common stocks and dividend-paying or interest-bearing securities that are convertible into common stock (the “80% Policy”). The Fund may invest up to 20% of its net assets in fixed-income securities, including (with respect to up to 10% of its net assets) securities rated BBB by Standard & Poor’s Ratings Services (“S&P”) or Baa by Moody’s Investors Service, Inc. (“Moody’s”) or below and unrated securities determined by the investment adviser to be of comparable quality. For purposes of rating restrictions, if securities are rated differently by the rating agencies, the higher rating is used. The Fund may also invest in non-income producing securities. The Fund may invest up to 35% of its total assets in foreign securities, some of which may be located in emerging market countries. As an alternative to holding foreign stocks directly, the Fund may invest in dollar-denominated securities of foreign companies that trade on U.S. exchanges or in the over-the-counter market (including depositary receipts that 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 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 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.

Income Risk. The Fund’s ability to distribute income to shareholders will depend on the yield available on the common stocks and convertible securities and fixed-income securities held by the Fund. Changes in the dividend policies of companies held by the Fund could make it difficult for the Fund to provide a predictable level of income.

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.

Fixed-Income and Convertible Security Risk. If the Fund invests in fixed-income securities or convertible securities, the Fund’s shares may be sensitive to increases in prevailing interest rates and the creditworthiness of issuers. An imbalance in supply and demand in the fixed-income market may result in valuation uncertainties and greater volatility, less liquidity, widening credit spreads and a lack of price transparency in the market. Fixed-income securities and convertible securities rated below investment grade and comparable unrated securities have speculative characteristics because of the credit risk associated with their issuers. Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments. An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs. Lower rated investments generally are subject to greater price volatility and illiquidity than higher rated investments. Fixed-income markets have recently experienced a period of relatively high volatility. If the Federal Reserve continues to taper or reverse its quantitative easing stimulus program and/or increases interest rates, fixed-income markets could experience continuing high volatility.

Real Estate Investment Trust Risk. Real estate investment trusts (“REITs”) are subject to special risks associated with real estate. 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. 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.

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

Derivatives Risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints. Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund. When derivatives are used to gain or limit exposure to a particular market or market segment, their performance may not correlate as expected to the performance of such market, thereby causing the Fund to fail to achieve its original purpose for using such derivatives. A decision as to whether, when and how to use derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. Derivative instruments traded in over-the-counter markets may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument. If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty. The loss on derivative transactions may substantially exceed the initial investment.

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 ability of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective. Subjective decisions may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized. The investment adviser also uses quantitative portfolio optimization and risk management techniques in making investment decisions for the Fund. There can be no assurance that these techniques will achieve the desired results.

General Fund Investing Risks. The Fund is not a complete investment program and 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 effect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

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.

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

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

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

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

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

For the ten years ended December 31, 2013 , the highest quarterly total return for Class A was

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.52%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

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

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 Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

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

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (5.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C. The Class I performance shown above for the period prior to June 20, 2005 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. If adjusted for other expenses, returns would be different. Investors cannot invest directly in an Index.

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown. After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities. After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and the Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Management Fees

rr_ManagementFeesOverAssets

0.63%

Other Expenses

rr_OtherExpensesOverAssets

0.18%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

677

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,126

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

677

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,126

Annual Return 2004

rr_AnnualReturn2004

25.11%

Annual Return 2006

rr_AnnualReturn2006

28.51%

Annual Return 2008

rr_AnnualReturn2008

(37.56%)

Annual Return 2010

rr_AnnualReturn2010

9.02%

Annual Return 2012

rr_AnnualReturn2012

13.50%

1 Year

rr_AverageAnnualReturnYear01

18.22%

10 Years

rr_AverageAnnualReturnYear10

9.48%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.63%

Other Expenses

rr_OtherExpensesOverAssets

0.18%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

684

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,180

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

184

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

980

1 Year

rr_AverageAnnualReturnYear01

19.46%

10 Years

rr_AverageAnnualReturnYear10

9.31%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.63%

Other Expenses

rr_OtherExpensesOverAssets

0.18%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

284

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

980

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

184

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

980

1 Year

rr_AverageAnnualReturnYear01

23.47%

10 Years

rr_AverageAnnualReturnYear10

9.31%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.63%

Other Expenses

rr_OtherExpensesOverAssets

0.18%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

83

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

450

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

83

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

450

1 Year

rr_AverageAnnualReturnYear01

25.72%

10 Years

rr_AverageAnnualReturnYear10

10.37%

[RiskReturnAbstract]

rr_RiskReturnAbstract

5 Years

rr_AverageAnnualReturnYear05

10.20%

1 Year

rr_AverageAnnualReturnYear01

10.60%

10 Years

rr_AverageAnnualReturnYear10

7.92%

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

32.39%

10 Years

rr_AverageAnnualReturnYear10

7.40%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to achieve long-term capital appreciation by investing in a diversified portfolio of equity securities.

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 54 of this Prospectus and page 25 of the Fund’s Statement of Additional Information.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)*

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” the portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 90% of the average value of its portfolio.

Expense Footnotes [Text Block]

rr_ExpenseFootnotesTextBlock

* Expenses in the table above and the Example below reflect the expenses of the Fund and the Large-Cap Core Research Portfolio (the “Portfolio”), the Fund’s master Portfolio.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests at least 80% of its net assets in stocks of large-cap companies (the “80% Policy”). Large-cap companies are companies having market capitalizations above the 20^th percentile of all companies included in the S&P 500 Index. The Fund generally intends to maintain investments in all or substantially all of the market sectors represented in the S&P 500 Index. Particular stocks owned will not mirror the S&P 500 Index. The Fund may invest up to 25% of its assets in foreign securities located in developed or emerging market countries. As an alternative to holding foreign stocks directly, the Fund may 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 also invest in other pooled investment vehicles and may lend its securities.

The Fund may engage in derivative transactions to seek return, to hedge against fluctuations in securities prices or as a substitute for the purchase or sale of securities or currencies. The Fund expects to use derivatives principally when seeking to gain exposure to equity securities by writing put options or to generate income by writing covered call options or put options. The Fund may also enter into a combination of option transactions on individual securities. Permitted derivatives include: the purchase or sale of forward or futures contracts; options on futures contracts; exchange-traded and over-the-counter options; equity collars and equity swap agreements.

The portfolio of securities is selected primarily on the basis of fundamental research. The portfolio manager utilizes information provided by, and the expertise of, the investment adviser’s research staff in making investment decisions. In selecting securities, the portfolio manager seeks companies that have sustainable earnings and cash flow, a strong and durable financial profile, secular and cyclical growth prospects, and the ability to maintain a competitive position within its industry. In addition, the portfolio manager employs a portfolio construction process that seeks to manage investment risk. This process includes the use of portfolio optimization tools and risk management techniques to assist in portfolio construction and monitoring and maintaining issuer and industry diversification among portfolio holdings. The portfolio manager may sell a security when he believes it is fully valued, the fundamentals of a company deteriorate, or to pursue alternative investment options.

The Fund currently invests its assets in the Portfolio, a separate registered investment company with the same investment objective and policies as the Fund.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Lose Money [Text]

rr_RiskLoseMoney

The Fund is not a complete investment program and you may lose money by investing in the Fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

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

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

Past performance (both before and after taxes) is no guarantee of future results.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

For the ten years ended December 31, 2013, the highest quarterly total return for Class A was 14.17% for the quarter ended September 30, 2009, and the lowest quarterly return was –18.04% for the quarter ended December 31, 2008.

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

and the lowest quarterly return was

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(18.04%)

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 One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares.

Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text]

rr_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod

The Class C performance shown above for the period prior to October 1, 2009 (commencement of operations) is the performance of Class A shares, adjusted for any applicable sales charge that applies to Class C shares (but not adjusted for any other differences in the expenses of the two classes) and the Class I performance shown above for the period prior to September 3, 2008 (commencement of operations) is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the two classes. If adjusted for other expenses, returns would be different.

Trading Symbol

dei_TradingSymbol

EAERX

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.44%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_NetExpensesOverAssets

1.25%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

987

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,185

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

987

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,185

Annual Return 2005

rr_AnnualReturn2005

9.29%

Annual Return 2007

rr_AnnualReturn2007

13.36%

Annual Return 2009

rr_AnnualReturn2009

24.57%

Annual Return 2011

rr_AnnualReturn2011

(2.06%)

Annual Return 2013

rr_AnnualReturn2013

32.83%

5 Years

rr_AverageAnnualReturnYear05

14.21%

Trading Symbol

dei_TradingSymbol

ECERX

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.19%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_NetExpensesOverAssets

2.00%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

667

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,509

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

667

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,509

5 Years

rr_AverageAnnualReturnYear05

14.86%

Trading Symbol

dei_TradingSymbol

EIERX

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.19%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_NetExpensesOverAssets

1.00%

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

359

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,426

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

359

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,426

5 Years

rr_AverageAnnualReturnYear05

15.86%

1 Year

rr_AverageAnnualReturnYear01

21.52%

10 Years

rr_AverageAnnualReturnYear10

6.92%

[RiskReturnAbstract]

rr_RiskReturnAbstract

5 Years

rr_AverageAnnualReturnYear05

11.41%

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deductions for fees, expenses or taxes)

5 Years

rr_AverageAnnualReturnYear05

17.93%

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

49.00%

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 54 of this Prospectus and page 25 of the Fund’s Statement of Additional Information.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example.

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Portfolio Concentration [Text]

rr_StrategyPortfolioConcentration

Under normal market conditions, the Fund invests primarily in value stocks of large-cap companies. Value stocks are common stocks that, in the opinion of the investment adviser, are inexpensive or undervalued relative to the overall stock market. 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 normally invests at least 80% of its net assets in equity securities of large-cap companies (the “80% Policy”). The Fund primarily invests in dividend-paying stocks, but also may invest in non-income producing stocks. The Fund may invest in convertible debt securities of any credit quality (including securities rated below investment grade (so-called “junk bonds”)). The Fund may invest up to 25% of its total assets in foreign securities, some of which may be located in emerging market countries. As an alternative to holding foreign stocks directly, the Fund may invest in dollar-denominated securities of foreign companies that trade on U.S. exchanges or in the over-the-counter market (including depositary receipts that 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 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 Investment Trust Risk. Real estate investment trusts (“REITs”) are subject to special risks associated with real estate. 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. 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 effect on securities markets and market participants, as well as on the Fund’s ability to execute its investment strategy.

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.

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

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

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.eatonvance.com

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

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

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

For the ten years ended December 31, 2013 , the highest quarterly total return for Class A was

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.09%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

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

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 Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

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

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

These returns reflect the maximum sales charge for Class A (5.75%) and any applicable contingent deferred sales charge (“CDSC”) for Class B and Class C. The Class I and R performance shown above for the periods prior to December 28, 2004 and February 18, 2004 (commencement of operations for such class, respectively), is the performance of Class A shares at net asset value without adjustment for any differences in the expenses of the classes. The Class R6 performance shown above for the period prior to July 1, 2014 (commencement of operations) is the performance of Class I shares at net asset value without adjustment for any differences in the expenses of the two classes. If adjusted for such differences, returns would be different. Investors cannot invest directly in an Index.

After-tax returns are calculated using the highest historical individual federal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and the actual characterization of distributions, and may differ from those shown. After-tax returns are not relevant to shareholders who hold shares in tax-deferred accounts or to shares held by non-taxable entities. After-tax returns for other Classes of shares will vary from the after-tax returns presented for Class A shares. Return After Taxes on Distributions for a period may be the same as Return Before Taxes for that period because no taxable distributions were made during that period. Also, Return After Taxes on Distributions and the Sale of Fund Shares for a period may be greater than or equal to Return After Taxes on Distributions for the same period because of losses realized on the sale of Fund shares.

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Management Fees

rr_ManagementFeesOverAssets

0.60%

Other Expenses

rr_OtherExpensesOverAssets

0.14%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

670

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,091

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

670

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,091

Annual Return 2004

rr_AnnualReturn2004

15.68%

Annual Return 2006

rr_AnnualReturn2006

18.81%

Annual Return 2008

rr_AnnualReturn2008

(34.47%)

Annual Return 2010

rr_AnnualReturn2010

10.05%

Annual Return 2012

rr_AnnualReturn2012

15.77%

1 Year

rr_AverageAnnualReturnYear01

21.91%

10 Years

rr_AverageAnnualReturnYear10

6.72%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.60%

Other Expenses

rr_OtherExpensesOverAssets

0.14%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

277

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

944

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

177

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

944

1 Year

rr_AverageAnnualReturnYear01

27.37%

10 Years

rr_AverageAnnualReturnYear10

6.55%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.60%

Other Expenses

rr_OtherExpensesOverAssets

0.14%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

76

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

411

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

76

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

411

1 Year

rr_AverageAnnualReturnYear01

29.65%

10 Years

rr_AverageAnnualReturnYear10

7.58%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.60%

Other Expenses

rr_OtherExpensesOverAssets

0.14%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

126

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

681

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

126

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

681

1 Year

rr_AverageAnnualReturnYear01

29.01%

10 Years

rr_AverageAnnualReturnYear10

7.09%

[RiskReturnAbstract]

rr_RiskReturnAbstract

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

0.60%

Other Expenses

rr_OtherExpensesOverAssets

0.03%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

64

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

351

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

64

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

351

1 Year

rr_AverageAnnualReturnYear01

29.65%

10 Years

rr_AverageAnnualReturnYear10

7.58%

[RiskReturnAbstract]

rr_RiskReturnAbstract

5 Years

rr_AverageAnnualReturnYear05

11.17%

1 Year

rr_AverageAnnualReturnYear01

13.56%

10 Years

rr_AverageAnnualReturnYear10

5.47%

[RiskReturnAbstract]

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

32.53%

10 Years

rr_AverageAnnualReturnYear10

7.58%