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  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The Fund seeks to provide long-term capital appreciation by investing primarily in mid-cap stocks that meet the Fund&amp;#8217;s investment criteria, including financial, sustainability and social responsibility factors. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND &lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Calvert mutual funds that are not money market funds. More information about these and other discounts is available from your financial professional and under &amp;#8220;Choosing a Share Class&amp;#8221; on page 89 and &amp;#8220;Reduced Sales Charges&amp;#8221; on page 92 of this Prospectus, and under &amp;#8220;Method of Distribution&amp;#8221; on page 50 of the Fund&amp;#8217;s Statement of Additional Information (&amp;#8220;SAI&amp;#8221;).</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt; (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Annual Fund Operating Expenses&lt;/b&gt; (expenses that you pay each &lt;br/&gt;year as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Example &lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Portfolio Turnover &lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 63% of its portfolio&amp;#8217;s average value.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE &lt;br/&gt;&lt;br/&gt; Principal Investment Strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The Fund invests primarily in the common stocks of mid-size U.S. companies. The Fund currently defines mid-cap companies as those whose market capitalization falls within the range of the Russell Midcap Growth Index. As of December 31, 2012, the market capitalization of the Russell Midcap Growth Index companies ranged from $337 million to $21.2 billion with a weighted median level of $8.8 billion and a weighted average level of $9.3 billion. The Russell Midcap Growth Index is reconstituted annually. The Fund normally seeks to have a weighted average market capitalization between $2 billion and $12 billion. &lt;br /&gt;&lt;br /&gt; Stocks chosen for the Fund combine growth and value characteristics or offer the opportunity to buy growth at a reasonable price. &lt;a name="page_22"&gt;&lt;/a&gt;&lt;br /&gt;&lt;br /&gt; The Fund may also invest up to 25% of its net assets in foreign securities. &lt;br /&gt;&lt;br /&gt; The Fund is &amp;#8220;non-diversified,&amp;#8221; which means it may invest a greater percentage of its assets in a particular issuer than a &amp;#8220;diversified&amp;#8221; fund.. &lt;br /&gt;&lt;br /&gt; The Subadvisor favors companies which have an above market average prospective growth rate, but sell at below market average valuations. The Subadvisor evaluates each stock in terms of its growth potential, the return for risk free investments, and the risk and reward potential for the company to determine a reasonable price for the stock. &lt;br /&gt;&lt;br /&gt; Sustainable and Socially Responsible Investing. The Fund seeks to invest in companies and other enterprises that demonstrate positive environmental, social and governance performance as they address corporate responsibility and sustainability challenges. Calvert believes that there are long-term benefits in an investment philosophy that attaches material weight to the environment, workplace relations, human rights, Indigenous Peoples&amp;#8217; rights, community relations, product safety and impact, and corporate governance and business ethics. Calvert also believes that managing risks and opportunities related to these issues can contribute positively to company performance as well as to investment performance over time. The Fund has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Fund seeks to invest and seeks to avoid investing. &lt;br /&gt;&lt;br /&gt; Investments are first selected for financial soundness and then evaluated according to the Fund&amp;#8217;s sustainable and socially responsible investment criteria. Investments must be consistent with the Fund&amp;#8217;s current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Principal Risks &lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. &lt;br /&gt;&lt;br /&gt; Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund. &lt;br /&gt;&lt;br /&gt; Management Risk. Individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result. &lt;br /&gt;&lt;br /&gt; Stock Market Risk. The market prices of stocks held by the Fund may fall. &lt;br /&gt;&lt;br /&gt; Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being. &lt;br /&gt;&lt;br /&gt; Mid-Cap Company Risk. Prices of mid-cap stocks can be more volatile than those of larger, more established companies. Mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies. &lt;br /&gt;&lt;br /&gt; Growth Company Risk. Prices of growth company securities may fall more than the overall equity markets due to changing economic, political or market conditions or disappointing growth company earnings results. Growth stocks also generally lack the dividends of some value stocks that can cushion stock prices in a falling market. &lt;br /&gt;&lt;br /&gt; Valuation Risk. A stock judged to be undervalued by the Subadvisor may actually be appropriately priced, and it may not appreciate as anticipated. &lt;br /&gt;&lt;br /&gt; Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. &lt;br /&gt;&lt;br /&gt; Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Performance&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The following bar chart and table show the Fund&amp;#8217;s annual returns and its long-term performance, which give some indication of the risks of investing in the Fund. The bar chart shows how the performance of the Class A shares has varied from year to year. The table compares the Fund&amp;#8217;s performance over time with that of an index and an average. &lt;br /&gt;&lt;br /&gt; The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. For updated performance information, visit www.calvert.com. &lt;br /&gt;&lt;br /&gt; Performance results for Class Y shares prior to 1/31/11 (the Class Y shares&amp;#8217; inception date) reflect the performance of Class A shares at net asset value. Actual Class Y share performance would have been higher than Class A share performance because Class Y, unlike Class A, has no Rule 12b-1 fees. &lt;br /&gt;&lt;br /&gt; The return for each of the Fund&amp;#8217;s other Classes of shares will differ from the Class A returns shown in the bar chart, depending upon the expenses of that Class. The bar chart does not reflect any sales charge that you may be required to pay upon purchase or redemption of the Fund&amp;#8217;s shares. Any sales charge will reduce your return.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Calendar Year Total Returns for Class A at NAV&lt;/b&gt;</rr:BarChartHeading>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_2" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_3" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The average total return table shows the Fund&amp;#8217;s returns with the maximum sales charge deducted, and no sales charge has been applied to the indices used for comparison in the table.&lt;br/&gt;&lt;br/&gt;After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account. The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares. After-tax returns are shown only for Class A shares; after-tax returns for other Classes will vary.</rr:PerformanceTableNarrativeTextBlock>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_4" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.05</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_5" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.01</rr:MaximumDeferredSalesChargeOverOther>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;b&gt;Average Annual Total Returns (as&lt;br/&gt;of 12/31/12) (with maximum sales&lt;br/&gt;charge deducted, if any)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.3055</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.085</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">-0.0038</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0614</rr:AnnualReturn2006>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">-0.369</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.3035</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.3002</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.022</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.1583</rr:AnnualReturn2012>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpensesDeferredChargesTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The contingent deferred sales charge reduces over time.</rr:ExpensesDeferredChargesTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;Annual Fund Operating Expenses &lt;/b&gt;(expenses that you pay each year as a &lt;br/&gt;% of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="USD">623</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">783</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">336</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="USD">131</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="USD">935</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">1268</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">727</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="USD">409</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="USD">1270</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">1679</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">1245</rr:ExpenseExampleYear05>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.011</rr:ManagementFeesOverAssets>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="USD">708</rr:ExpenseExampleYear05>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.011</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.011</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0.011</rr:ManagementFeesOverAssets>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="USD">2212</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">2824</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">2666</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="USD">1556</rr:ExpenseExampleYear10>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.01</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.01</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">283</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">236</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">868</rr:ExpenseExampleNoRedemptionYear03>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0049</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">727</rr:ExpenseExampleNoRedemptionYear03>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.0108</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.0062</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">1479</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">1245</rr:ExpenseExampleNoRedemptionYear05>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0.0036</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="USD">2824</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="USD">2666</rr:ExpenseExampleNoRedemptionYear10>
  <rr:AcquiredFundFeesAndExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:AcquiredFundFeesAndExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:AcquiredFundFeesAndExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:AcquiredFundFeesAndExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.1033</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0932</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0806</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.0936</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.1395</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0.1609</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberRussellMidcapGrowthIndex_MemberClassAbcAndY_Member" unitRef="pure">0.1581</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberLipperMidCapCoreFundsAvg_MemberClassAbcAndY_Member" unitRef="pure">0.1559</rr:AverageAnnualReturnYear01>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0186</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.032</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.0274</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0.0148</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0381</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0342</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0326</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.0348</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.0398</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0.049</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberRussellMidcapGrowthIndex_MemberClassAbcAndY_Member" unitRef="pure">0.0323</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberLipperMidCapCoreFundsAvg_MemberClassAbcAndY_Member" unitRef="pure">0.0223</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberLipperMidCapCoreFundsAvg_MemberClassAbcAndY_Member" unitRef="pure">0.0889</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberRussellMidcapGrowthIndex_MemberClassAbcAndY_Member" unitRef="pure">0.1032</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0.0762</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.0672</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.065</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0623</rr:AverageAnnualReturnYear10>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_6" xsi:nil="true" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure" />
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0706</rr:AverageAnnualReturnYear10>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_7" xsi:nil="true" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure" />
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_8" xsi:nil="true" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure" />
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_9" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">-0.0007</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets xsi:nil="true" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure" />
  <rr:NetExpensesOverAssets xsi:nil="true" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure" />
  <rr:NetExpensesOverAssets xsi:nil="true" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure" />
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0.0141</rr:NetExpensesOverAssets>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0475</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_10" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_11" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.05</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_12" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.01</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_13" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.009</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.009</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.009</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0.009</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.01</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.01</rr:DistributionAndService12b1FeesOverAssets>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;Example &lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0038</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.009</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.0043</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0.0039</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">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:&lt;ul type="square"&gt;&lt;li&gt;you invest $10,000 in the Fund for the time periods indicated and then either redeem or hold your shares at the end of those periods;&lt;/li&gt;&lt;li&gt;your investment has a 5% return each year;&lt;/li&gt;&lt;li&gt; the Fund&amp;#8217;s operating expenses remain the same; and&lt;/li&gt;&lt;li&gt;any Calvert expense limitation is in effect for the period indicated in the fee table above.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0153</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023781_MemberClassAbcAndY_Member" unitRef="pure">0.028</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023782_MemberClassAbcAndY_Member" unitRef="pure">0.0233</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000099329_MemberClassAbcAndY_Member" unitRef="pure">0.0129</rr:ExpensesOverAssets>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="USD">655</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">823</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="USD">144</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="USD">1032</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">1386</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="USD">461</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="USD">1433</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">1874</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="USD">801</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="USD">2551</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">3194</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="USD">1762</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">323</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">277</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">986</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">850</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">1674</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">1450</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="USD">3194</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">3070</rr:ExpenseExampleNoRedemptionYear10>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;Portfolio Turnover&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 43% of its portfolio&amp;#8217;s average value.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member" unitRef="pure">0.43</rr:PortfolioTurnoverRate>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE &lt;br&gt;&lt;br/&gt;Principal Investment Strategies&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The Fund normally invests at least 80% of its net assets, including borrowings for investment purposes, in equity securities of foreign companies (common and preferred stock and the depositary receipts on such stock). The Fund will provide shareholders with at least 60 days&amp;#8217; notice before changing this 80% policy. Using a core investment approach, the Fund invests primarily in common and preferred stocks of non-U.S. large-cap companies. The Fund defines non-U.S. large-cap companies as those whose market capitalization falls within the range of the Morgan Stanley Capital International (&amp;#8220;MSCI&amp;#8221;) Europe, Australasia and Far East (&amp;#8220;EAFE&amp;#8221;) Global Investable Market Index (&amp;#8220;IMI&amp;#8221;). As of December 31, 2012, the market capitalization of the MSCI EAFE IMI companies ranged from $47 million to $225 billion with a weighted median level of $28.3 billion an a weighted average level of $51.5 billion. MSCI Barra reassesses the MSCI EAFE IMI quarterly and conducts full updating reviews twice per year and partial reviews in the other two quarters. The Fund normally seeks to have a weighted average market capitalization of at least $10 billion.&lt;br/&gt;&lt;br/&gt;The Fund generally holds stocks of companies from the constituent countries of the MSCI EAFE IMI, but may invest in other countries, including emerging markets stocks. The Fund will invest in at least three different countries. The Advisor and the Subadvisors focus on deriving returns from individual stock selection (bottom-up). The Advisor and the Subadvisors utilize fundamental insights arrived at through qualitative and quantitative analysis of a broad range of non-U.S. securities to identify stocks expected to provide returns superior to that of the benchmark. The Advisor attempts to control the portfolio&amp;#8217;s risk level and maximize the Fund&amp;#8217;s return potential relative to the MSCI EAFE IMI benchmark by balancing the risks and opportunities among the portions of the portfolio managed by the Advisor and each Subadvisor. The Advisor may shift allocations among the Advisor and the Subadvisors depending on market conditions, the Advisor's or Subadvisors' respective style biases, and performance opportunities.&lt;br/&gt;&lt;br/&gt;The Fund invests no more than 5% of its net assets in U.S. companies (excluding High Social Impact and Special Equities investments). See &amp;#8220;Special Investment Programs&amp;#8221; in this Prospectus.&lt;br/&gt;&lt;br/&gt;The Fund may invest in American Depositary Receipts (&amp;#8220;ADRs&amp;#8221;), which may be sponsored or unsponsored, and Global Depositary Receipts (&amp;#8220;GDRs&amp;#8221;).&lt;br/&gt;&lt;br/&gt;Sustainable and Socially Responsible Investing. The Fund seeks to invest in companies and other enterprises that demonstrate positive environmental, social and governance performance as they address corporate responsibility and sustainability challenges. Calvert believes that there are long-term benefits in an investment philosophy that attaches material weight to the environment, workplace relations, human rights, Indigenous Peoples&amp;#8217; rights, community relations, product safety and impact, and corporate governance and business ethics. Calvert also believes that managing risks and opportunities related to these issues can contribute positively to company performance as well as to investment performance over time. The Fund has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Fund seeks to invest and seeks to avoid investing.&lt;br/&gt;&lt;br/&gt;Investments are first selected for financial soundness and then evaluated according to the Fund&amp;#8217;s sustainable and socially responsible investment criteria. Investments must be consistent with the Fund&amp;#8217;s current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;Principal Risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;br/&gt;&lt;br/&gt;Management Risk. Individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result. The Advisor&amp;#8217;s allocation of Fund assets among the portions of the portfolio managed by the Advisor and each Subadvisor may cause the Fund to under-perform.&lt;br/&gt;&lt;br/&gt;Stock Market Risk. The market prices of stocks held by the Fund may fall.&lt;br/&gt;&lt;br/&gt;Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being.&lt;br/&gt;&lt;br/&gt;Preferred Stock Risk. The market value of preferred stock generally decreases when interest rates rise and is affected by the issuer&amp;#8217;s ability to make payments on the preferred stock.&lt;br/&gt;&lt;br/&gt;Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. Foreign securities include ADRs and GDRs. Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends.&lt;br/&gt;&lt;br/&gt;Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall. GDRs can involve direct currency risk since, unlike ADRs, they may not be U.S. dollar-denominated. ADRs indirectly bear currency risk because they represent an interest in securities that are not denominated in U.S. dollars.&lt;br/&gt;&lt;br/&gt;Foreign Currency Transactions Risk. Transactions in foreign currency in connection with the purchase and sale of investments in foreign markets may result in foreign currency exposure and the potential for losses due to fluctuations in currency exchange rates.&lt;br/&gt;&lt;br/&gt;These losses may occur without regard to the quality or performance of the investment itself. Foreign currency transactions may also prevent the Fund from realizing profits on favorable movements in exchange rates.&lt;br/&gt;&lt;br/&gt;Large-Cap Company Risk. Large-cap companies may be unable to respond quickly to new competitive challenges such as changes in technology, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.&lt;br/&gt;&lt;br/&gt;Emerging Markets Risk. The risks of investing in emerging market securities are greater than those of investing in securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.&lt;br/&gt;&lt;br/&gt;Multi-Manager Risk. While the Advisor monitors the overall management of the Fund, the Advisor and the Subadvisors make investment decisions independently from each other. It is possible that the Advisor's and each Subadvisor's investment styles may not always be complementary, which could affect the performance and transaction costs of the Fund.</rr:RiskNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;Performance &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The following bar chart and table show the Fund&amp;#8217;s annual returns and its long-term performance, which give some indication of the risks of investing in the Fund. The bar chart shows how the performance of the Class A shares has varied from year to year. The table compares the Fund&amp;#8217;s performance over time to that of an index and an average.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. For updated performance information, visit www.calvert.com.&lt;br/&gt;&lt;br/&gt;Performance results for Class Y shares prior to 10/31/08 (the Class Y shares&amp;#8217; inception date) reflect the performance of Class A shares at net asset value. Actual Class Y share performance would have been higher than Class A share performance because Class Y, unlike Class A, has no Rule 12b-1 fees.&lt;br/&gt;&lt;br/&gt;The return for each of the Fund&amp;#8217;s other Classes of shares will differ from the Class A returns shown in the bar chart, depending upon the expenses of that Class. The bar chart does not reflect any sales charge that you may be required to pay upon purchase or redemption of the Fund&amp;#8217;s shares. Any sales charge will reduce your return.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The bar chart shows how the performance of the Class A shares has varied from year to year.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">www.calvert.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartDoesNotReflectSalesLoads contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The bar chart does not reflect any sales charge that you may be required to pay upon purchase or redemption of the Fund&amp;#8217;s shares. Any sales charge will reduce your return.</rr:BarChartDoesNotReflectSalesLoads>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;Calendar Year Total Returns for Class A at NAV&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;table style="WIDTH: 6in;" border="0" cellspacing="0"&gt;&lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="TEXT-INDENT: 0.225pt" align="right"&gt;&lt;b&gt;Quarter&lt;/b&gt;&lt;/td&gt;  &lt;td align="right"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/td&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="right"&gt;&lt;b&gt;Ended&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-INDENT: 2.438pt" align="right"&gt;&lt;b&gt;Return&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Best Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;6/30/09&lt;/td&gt;  &lt;td align="right"&gt;23.55&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Worst Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/08&lt;/td&gt;  &lt;td align="right"&gt;-24.02&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.29</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.1725</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.1109</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.266</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.019</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">-0.4632</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.2174</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0582</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">-0.1391</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.1761</rr:AnnualReturn2012>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member">Best Quarter (of periods shown)</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.2355</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member">Worst Quarter (of periods shown)</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">-0.2402</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The average total return table shows the Fund&amp;#8217;s returns with the maximum sales charge deducted, and no sales charge has been applied to the indices used for comparison in the table. &lt;br/&gt;&lt;br/&gt;After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account. The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares. After-tax returns are shown only for Class A shares; after-tax returns for other Classes will vary.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableDoesReflectSalesLoads contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The average total return table shows the Fund&amp;#8217;s returns with the maximum sales charge deducted, and no sales charge has been applied to the indices used for comparison in the table.</rr:PerformanceTableDoesReflectSalesLoads>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;b&gt;Average Annual Total Returns &lt;br/&gt;(as of 12/31/12) (with maximum sales &lt;br/&gt;charge deducted, if any)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.1199</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.1199</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.081</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.1121</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.1556</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0.1804</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberMsciEafeImi_MemberClassAbcAndY_Member" unitRef="pure">0.182</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberLipperInternationalMultiCapGrowthFundsAvg_MemberClassAbcAndY_Member" unitRef="pure">0.1803</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">-0.0775</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">-0.0626</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">-0.0815</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">-0.0771</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">-0.0655</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberMsciEafeImi_MemberClassAbcAndY_Member" unitRef="pure">-0.029</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberLipperInternationalMultiCapGrowthFundsAvg_MemberClassAbcAndY_Member" unitRef="pure">-0.0303</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0375</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0335</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">0.0342</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023777_MemberClassAbcAndY_Member" unitRef="pure">0.0309</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="pure">0.0335</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000073560_MemberClassAbcAndY_Member" unitRef="pure">0.0444</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberMsciEafeImi_MemberClassAbcAndY_Member" unitRef="pure">0.0908</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberLipperInternationalMultiCapGrowthFundsAvg_MemberClassAbcAndY_Member" unitRef="pure">0.0872</rr:AverageAnnualReturnYear10>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member" unitRef="pure">0.63</rr:PortfolioTurnoverRate>
  <rr:ExpenseBreakpointDiscounts contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Calvert mutual funds that are not money market funds.</rr:ExpenseBreakpointDiscounts>
  <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member" unitRef="USD">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The bar chart shows how the performance of the Class A shares has varied from year to year.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">www.calvert.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartDoesNotReflectSalesLoads contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The bar chart does not reflect any sales charge that you may be required to pay upon purchase or redemption of the Fund&amp;#8217;s shares. Any sales charge will reduce your return.</rr:BarChartDoesNotReflectSalesLoads>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member">Best Quarter (of periods shown)</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member">2010-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.1697</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member">Worst Quarter (of periods shown)</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">-0.2522</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0956</rr:AnnualReturn2007>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023776_MemberClassAbcAndY_Member" unitRef="pure">-0.0779</rr:AverageAnnualReturnYear05>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">377</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">850</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">1450</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023778_MemberClassAbcAndY_Member" unitRef="USD">3070</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertCapitalAccumulationFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertCapitalAccumulationFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertCapitalAccumulationFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleNoRedemptionTransposedCalvertCapitalAccumulationFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualTotalReturnsCalvertCapitalAccumulationFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAverageAnnualTotalReturnsTransposedCalvertCapitalAccumulationFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpensesDeferredChargesTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The contingent deferred sales charge reduces over time.</rr:ExpensesDeferredChargesTextBlock>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008725_MemberC000023780_MemberClassAbcAndY_Member" unitRef="pure">0.0683</rr:AverageAnnualReturnYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;CALVERT INTERNATIONAL OPPORTUNITIES FUND&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Class&lt;/b&gt;&amp;nbsp;(Ticker):&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;A&lt;/b&gt; (CIOAX)&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;C&lt;/b&gt; (COICX)&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;Y&lt;/b&gt; (CWVYX)</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Calvert mutual funds that are not money market funds. More information about these and other discounts is available from your financial professional and under &amp;#8220;Choosing a Share Class&amp;#8221; on page 89 and &amp;#8220;Reduced Sales Charges&amp;#8221; on page 92 of this Prospectus, and under &amp;#8220;Method of Distribution&amp;#8221; on page 50 of the Fund&amp;#8217;s Statement of Additional Information (&amp;#8220;SAI&amp;#8221;).</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseBreakpointDiscounts contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Calvert mutual funds that are not money market funds.</rr:ExpenseBreakpointDiscounts>
  <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member" unitRef="USD">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt; (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.0475</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_14" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_15" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0.01</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_16" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Annual Fund Operating Expenses &lt;/b&gt;(expenses that you pay each year as &lt;br/&gt;a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.0115</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0.0115</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0.0115</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0.01</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.0095</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0.015</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0.0134</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.0235</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0.0365</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0.0249</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_17" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.0069</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_18" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">-0.0115</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_19" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">-0.0108</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.0166</rr:NetExpensesOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0.025</rr:NetExpensesOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0.0141</rr:NetExpensesOverAssets>
  <rr:ExpensesDeferredChargesTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The contingent deferred sales charge reduces over time.</rr:ExpensesDeferredChargesTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Example &lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">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:&lt;ul type="square"&gt;&lt;li&gt;you invest $10,000 in the Fund for the time periods indicated and then either redeem or hold your shares at the end of those periods;&lt;/li&gt;&lt;li&gt;your investment has a 5% return each year;&lt;/li&gt;&lt;li&gt;the Fund&amp;#8217;s operating expenses remain the same; and&lt;/li&gt;&lt;li&gt; any Calvert expense limitation is in effect for the period indicated in the fee table above.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="USD">636</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">353</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="USD">144</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="USD">1111</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">1012</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="USD">672</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="USD">1611</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">1791</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="USD">1228</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="USD">2983</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">3832</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="USD">2744</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">253</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">1012</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">1791</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="USD">3832</rr:ExpenseExampleNoRedemptionYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;CALVERT EMERGING MARKETS EQUITY FUND &lt;/b&gt;&lt;br/&gt;&lt;b&gt;Class&lt;/b&gt;&amp;nbsp;&amp;nbsp;(Ticker):&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;A&lt;/b&gt; (CVMAX)&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;C&lt;/b&gt; (CVMCX)&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;Y&lt;/b&gt; (CVMYX)</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">The Fund seeks long-term capital appreciation by investing primarily in equity securities of companies located in emerging market countries, in accordance with the Fund&amp;#8217;s sustainability and corporate responsibility criteria. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Calvert mutual funds that are not money market funds. More information about these and other discounts is available from your financial professional and under &amp;#8220;Choosing a Share Class&amp;#8221; on page 89 and &amp;#8220;Reduced Sales Charges&amp;#8221; on page 92 of this Prospectus, and under &amp;#8220;Method of Distribution&amp;#8221; on page 50 of the Fund&amp;#8217;s Statement of Additional Information (&amp;#8220;SAI&amp;#8221;).</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseBreakpointDiscounts contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Calvert mutual funds that are not money market funds.</rr:ExpenseBreakpointDiscounts>
  <rr:ExpenseBreakpointMinimumInvestmentRequiredAmount decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member" unitRef="USD">50000</rr:ExpenseBreakpointMinimumInvestmentRequiredAmount>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt; (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">0.0475</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_20" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_21" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">0.01</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther id="Item_22" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;Annual Fund Operating Expenses&lt;/b&gt; (expenses that you pay each year as&lt;br/&gt;a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">0.013</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">0.013</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">0.013</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">0.01</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">0.014</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">0.0281</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">0.0358</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">0.0295</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">0.0511</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">0.0488</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_23" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">-0.0117</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_24" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">-0.0233</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_25" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">-0.0335</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="pure">0.0178</rr:NetExpensesOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="pure">0.0278</rr:NetExpensesOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="pure">0.0153</rr:NetExpensesOverAssets>
  <rr:ExpensesDeferredChargesTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">The contingent deferred sales charge reduces over time.</rr:ExpensesDeferredChargesTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;Example&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">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:&lt;ul type="square"&gt;&lt;li&gt;you invest $10,000 in the Fund for the time periods indicated and then either redeem or hold your shares at the end of those periods;&lt;/li&gt;&lt;li&gt;your investment has a 5% return each year;&lt;/li&gt;&lt;li&gt;the Fund&amp;#8217;s operating expenses remain the same; and&lt;/li&gt;&lt;li&gt;any Calvert expense limitation is in effect for the period indicated in the fee table above.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;Portfolio Turnover&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. Because the Fund has less than a full fiscal year of investment operations, no portfolio turnover rate is provided for the Fund at this time.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE&lt;br/&gt;&lt;br/&gt;Principal Investment Strategies&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">The Fund normally invests at least 80% of its assets, including borrowings for investment purposes, in equity securities of companies located in emerging market countries. The Fund will provide shareholders with at least 60 days&amp;#8217; notice before changing this 80% policy. &lt;br/&gt;&lt;br/&gt;Equity securities held by the Fund will primarily include common stock, preferred stock, depositary receipts, options on securities, and equity-equivalent securities, such as participatory notes (&amp;#8220;P-notes&amp;#8221;). Derivatives, such as futures, options on futures, and swaps, may also be held by the Fund incidental to its main investment strategy.&lt;br/&gt;&lt;br/&gt;The Subadvisor considers emerging market countries to be those included in the Fund&amp;#8217;s benchmark index, the MSCI Emerging Markets Index; countries determined by the World Bank to have a low to middle income economy; and other countries or markets with similar emerging market characteristics as determined by the Subadvisor. A company is considered to be located in an emerging market country if it has a class of securities whose principal securities market is in an emerging market country; is organized under the laws of, or has a principal office in, an emerging market country; derives 50% or more of its total revenues or earnings from goods produced, sales made, or services provided in one or more emerging market countries; or maintains 50% or more of its assets in one or more emerging market countries. &lt;br/&gt;&lt;br/&gt;The Fund may invest in companies of any market capitalization size but seeks to have market capitalization size characteristics similar to that of the MSCI Emerging Markets Index. As of December 31, 2012, the market capitalization of the MSCI Emerging Markets Index companies ranged from $727 million to $259 billion, with a weighted median level of $18.2 billion and a weighted average level of $48.1 billion. The Fund is expected to invest its assets among companies located in emerging markets throughout the world. The Fund may also invest in securities denominated in foreign currencies and may engage in foreign currency transactions. &lt;br/&gt;&lt;br/&gt;The Fund is &amp;#8220;non-diversified,&amp;#8221; which means it may invest a greater percentage of its assets in a particular issuer than a &amp;#8220;diversified&amp;#8221; fund. &lt;br/&gt;&lt;br/&gt;The Subadvisor seeks to identify companies located in emerging market countries that are trading at a discount to what the Subadvisor believes to be their intrinsic value but have the potential to increase their book value. To this end, the Subadvisor combines a top-down approach to country analysis with a bottom-up approach to fundamental company research. The country analysis includes an assessment of the risks and opportunities for each emerging market country through in-depth quantitative and qualitative analysis. In addition, the country research process produces a ranking of emerging markets countries based on expected returns with greater active weights allocated to higher-ranking countries. The fundamental company research also utilizes a number of qualitative and quantitative methods. Portfolio construction is determined by the Subadvisor based on its level of conviction in the country and company with input from proprietary risk models. &lt;br/&gt;&lt;br/&gt;The Fund may sell a security when it no longer appears attractive by the Subadvisor or does not meet the Fund&amp;#8217;s sustainability and corporate responsibility criteria. &lt;br/&gt;&lt;br/&gt;Sustainable and Responsible Investing. The Fund seeks to invest in emerging market companies whose products/services or industrial/ business practices contribute towards addressing one or more global sustainability challenges in their local and/or international markets, including development, poverty and health; environment and climate change; and rights and governance. &lt;br/&gt;&lt;br/&gt;Investments are first selected for financial soundness and then evaluated according to these sustainability and corporate responsibility criteria, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;Principal Risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;br/&gt;&lt;br/&gt;Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund. &lt;br /&gt;&lt;br /&gt;Management Risk. The individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result.&lt;br/&gt;&lt;br/&gt;Stock Market Risk. The market prices of stocks held by the Fund may fall. &lt;br/&gt;&lt;br/&gt;Market Capitalization Risks. Large-cap companies may be unable to respond quickly to new competitive challenges such as changes in technology, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. Prices of small-cap and mid-cap stocks can be more volatile than those of larger, more established companies. Small-cap and mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies. Prices of microcap securities are generally even more volatile and their markets are even less liquid relative to small-cap, mid-cap and large-cap securities.&lt;br/&gt;&lt;br/&gt;Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being.&lt;br/&gt;&lt;br/&gt;Preferred Stock Risk. The market value of preferred stock generally decreases when interest rates rise and is affected by the issuer&amp;#8217;s ability to make payments on the preferred stock.&lt;br/&gt;&lt;br/&gt;Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. Foreign securities include American Depositary Receipts (&amp;#8220;ADRs&amp;#8221;) and Global Depositary Receipts (&amp;#8220;GDRs&amp;#8221;). Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends.&lt;br/&gt;&lt;br/&gt;P-Note Risk. To the extent the Fund invests in P-notes, it is subject to certain risks in addition to the risks normally associated with a direct investment in the underlying foreign securities the P-note seeks to replicate. As the purchaser of a P-note, the Fund is relying on the creditworthiness of the counterparty issuing the P-note and does not have the same rights under a P-note as it would as a shareholder of the underlying issuer. Therefore, if a counterparty becomes insolvent, the Fund could lose the total value of its investment in the P-note. In addition, there is no assurance that there will be a trading market for a P-note or that the trading price of a P-note will equal the value of the underlying security.&lt;br/&gt;&lt;br/&gt;Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall. GDRs can involve direct currency risk since, unlike ADRs, they may not be U.S. dollar-denominated. ADRs indirectly bear currency risk because they represent an interest in securities that are not denominated in U.S. dollars.&lt;br/&gt;&lt;br/&gt;Foreign Currency Transactions Risk. Transactions in foreign currency in connection with the purchase and sale of investments in foreign markets may result in foreign currency exposure and the potential for losses due to fluctuations in currency exchange rates. These losses may occur without regard to the quality or performance of the investment itself. Foreign currency transactions may also prevent the Fund from realizing profits on favorable movements in exchange rates.&lt;br/&gt;&lt;br/&gt;Emerging Markets Risk. The risks of investing in emerging market securities are greater than those of investing in securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.&lt;br/&gt;&lt;br/&gt;Valuation Risk. A stock judged to be undervalued by the Subadvisor may actually be appropriately priced, and it may not appreciate as anticipated.&lt;br/&gt;&lt;br/&gt;Derivatives Risk. In general, a derivative is a financial contract whose value is based on the value of a financial asset (such as a stock, bond, or currency), a physical asset (such as gold), or a market index (such as the S&amp;amp;P 500 Index). Derivative instruments are subject to a number of risks, including the risk of changes in the market price of the underlying asset, credit risk with respect to the counterparty, and liquidity risk. The Fund&amp;#8217;s use of certain derivatives may also have a leveraging effect, which may increase the volatility of the Fund and reduce its returns.</rr:RiskNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;b&gt;Performance&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">Because the Fund has less than a full calendar year of investment operations, no performance information is presented for the Fund at this time.</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="USD">647</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="USD">381</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="USD">156</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118372_MemberClassAcy_Member" unitRef="USD">1239</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="USD">1325</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118375_MemberClassAcy_Member" unitRef="USD">789</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="USD">281</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118373_MemberClassAcy_Member" unitRef="USD">1325</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertEmergingMarketsEquityFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertEmergingMarketsEquityFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertEmergingMarketsEquityFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleNoRedemptionTransposedCalvertEmergingMarketsEquityFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The Fund seeks to provide long-term capital appreciation by investing primarily in mid-cap stocks that meet the Fund&amp;#8217;s investment criteria, including financial, sustainability and social responsibility factors. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;CALVERT CAPITAL ACCUMULATION FUND&lt;/b&gt;&lt;br/&gt;&lt;b&gt;Class&lt;/b&gt;&amp;nbsp;&amp;nbsp;(Ticker):&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;I&lt;/b&gt;&amp;nbsp;(CCPIX)</rr:RiskReturnHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt; (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Annual Fund Operating Expenses&lt;/b&gt; (expenses that you pay each year as a &lt;br/&gt;% of the value of your investment)
</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0075</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0013</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0088</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_26" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">-0.0002</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0086</rr:NetExpensesOverAssets>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="USD">8778</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="USD">27870</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="USD">48567</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="USD">108248</rr:ExpenseExampleYear10>
  <rr:PerformanceOneYearOrLess contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">Because the Fund has less than a full calendar year of investment operations, no performance information is presented for the Fund at this time.</rr:PerformanceOneYearOrLess>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.3126</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.094</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0054</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0698</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.1042</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">-0.3637</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.3171</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.3114</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0289</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.166</rr:AnnualReturn2012>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;table style="WIDTH: 6in;" border="0" cellspacing="0"&gt;&lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="TEXT-INDENT: 0.225pt" align="right"&gt;&lt;b&gt;Quarter&lt;/b&gt;&lt;/td&gt;  &lt;td align="right"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/td&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="right"&gt;&lt;b&gt;Ended&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-INDENT: 2.438pt" align="right"&gt;&lt;b&gt;Return&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Best Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/10&lt;/td&gt;  &lt;td align="right"&gt;17.19&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Worst Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/08&lt;/td&gt;  &lt;td align="right"&gt;-25.02&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member">Best Quarter (of periods shown)</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member">Worst Quarter (of periods shown)</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member">2010-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.1719</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">-0.2502</rr:BarChartLowestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.166</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.1561</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.121</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberRussellMidcapGrowthIndex_MemberClassI_Member" unitRef="pure">0.1581</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberLipperMidCapCoreFundsAvg_MemberClassI_Member" unitRef="pure">0.1559</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0532</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.049</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberRussellMidcapGrowthIndex_MemberClassI_Member" unitRef="pure">0.0323</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberLipperMidCapCoreFundsAvg_MemberClassI_Member" unitRef="pure">0.0223</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0569</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0844</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0823</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008725_MemberC000023783_MemberClassI_Member" unitRef="pure">0.0749</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberRussellMidcapGrowthIndex_MemberClassI_Member" unitRef="pure">0.1032</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberLipperMidCapCoreFundsAvg_MemberClassI_Member" unitRef="pure">0.0889</rr:AverageAnnualReturnYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;CALVERT EMERGING MARKETS EQUITY FUND &lt;/b&gt;&lt;br/&gt;&lt;b&gt;Class&lt;/b&gt;&amp;nbsp;&amp;nbsp;(Ticker):&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;I&lt;/b&gt; (CVMIX)</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">The Fund seeks long-term capital appreciation by investing primarily in equity securities of companies located in emerging market countries, in accordance with the Fund&amp;#8217;s sustainability and corporate responsibility criteria. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account. The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Average Annual Total Returns&lt;br/&gt;(as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt; (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">www.calvert.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The bar chart shows how the performance of the Class I shares has varied from year to year.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Example&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Portfolio Turnover&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;Annual Fund Operating Expenses&lt;/b&gt; (expenses that you pay each year as&lt;br/&gt;a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 63% of its portfolio&amp;#8217;s average value.</rr:PortfolioTurnoverTextBlock>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="pure">0.0105</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE&lt;br /&gt;&lt;br /&gt;Principal Investment Strategies&lt;/b&gt;
</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The Fund invests primarily in the common stocks of mid-size U.S. companies. The Fund currently defines mid-cap companies as those whose market capitalization falls within the range of the Russell Midcap Growth Index. As of December 31, 2012, the market capitalization of the Russell Midcap Growth Index companies ranged from $337 million to $21.2 billion with a weighted median level of $8.8 billion and a weighted average level of $9.3 billion. The Russell Midcap Growth Index is reconstituted annually. The Fund normally seeks to have a weighted average market capitalization between $2 billion and $12 billion.&lt;br /&gt;&lt;br /&gt;Stocks chosen for the Fund combine growth and value characteristics or offer the opportunity to buy growth at a reasonable price. The Fund may also invest up to 25% of its net assets in foreign securities.&lt;br /&gt;&lt;br /&gt;The Fund is &amp;#8220;non-diversified,&amp;#8221; which means it may invest a greater percentage of its assets in a particular issuer than a &amp;#8220;diversified&amp;#8221; fund.&lt;br /&gt;&lt;br /&gt;The Subadvisor favors companies which have an above market average prospective growth rate, but sell at below market average valuations. The Subadvisor evaluates each stock in terms of its growth potential, the return for risk free investments, and the risk and reward potential for the company to determine a reasonable price for the stock.&lt;br /&gt;&lt;br /&gt;Sustainable and Socially Responsible Investing. The Fund seeks to invest in companies and other enterprises that demonstrate positive environmental, social and governance performance as they address corporate responsibility and sustainability challenges. Calvert believes that there are long-term benefits in an investment philosophy that attaches material weight to the environment, workplace relations, human rights, Indigenous Peoples&amp;#8217; rights, community relations, product safety and impact, and corporate governance and business ethics. Calvert also believes that managing risks and opportunities related to these issues can contribute positively to company performance as well as to investment performance over time. The Fund has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Fund seeks to invest and seeks to avoid investing.&lt;br /&gt;&lt;br /&gt;Investments are first selected for financial soundness and then evaluated according to the Fund&amp;#8217;s sustainable and socially responsible investment criteria. Investments must be consistent with the Fund&amp;#8217;s current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="pure">0.0079</rr:OtherExpensesOverAssets>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">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: &lt;ul type="square"&gt;&lt;li&gt;you invest $1,000,000 in the Fund for the time periods indicated; &lt;/li&gt;&lt;li&gt;your investment has a 5% return each year;&lt;/li&gt;&lt;li&gt;the Fund&amp;#8217;s operating expenses remain the same; and&lt;/li&gt;&lt;li&gt;any Calvert expense limitation is in effect for the period indicated in the fee table above.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member" unitRef="pure">0.63</rr:PortfolioTurnoverRate>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Performance&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">The following bar chart and table show the Fund&amp;#8217;s annual returns and its long-term performance, which give some indication of the risks of investing in the Fund. The bar chart shows how the performance of the Class I shares has varied from year to year. The table compares the Fund&amp;#8217;s performance over time with that of an index and an average. &lt;br /&gt;&lt;br /&gt;The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. For updated performance information, visit www.calvert.com. &lt;br /&gt;&lt;br /&gt;No shareholders held Class I shares for the period from January 18, 2002 through June 3, 2003. Performance results for Class I shares for this period reflect the performance of Class A shares at net asset value. Actual Class I share performance would have been higher than Class A share performance because Class I, unlike Class A, has no Rule 12b-1 fees.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Calendar Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="pure">0.0184</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_27" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="pure">-0.0041</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="pure">0.0143</rr:NetExpensesOverAssets>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;b&gt;Principal Risks&lt;/b&gt;</rr:RiskHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertCapitalAccumulationFundClassI column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertCapitalAccumulationFundClassI column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;Example&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">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:&lt;ul type="square"&gt;&lt;li&gt;you invest $1,000,000 in the Fund for the time periods indicated;&lt;/li&gt;&lt;li&gt;your investment has a 5% return each year;&lt;/li&gt;&lt;li&gt;the Fund&amp;#8217;s operating expenses remain the same; and&lt;/li&gt;&lt;li&gt;any Calvert expense limitation is in effect for the period indicated in the fee table above.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertCapitalAccumulationFundClassI column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="USD">14555</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberC000118374_MemberClassI_Member" unitRef="USD">54001</rr:ExpenseExampleYear03>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualTotalReturnsCalvertCapitalAccumulationFundClassIBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;Portfolio Turnover&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. Because the Fund has less than a full fiscal year of investment operations, no portfolio turnover rate is provided for the Fund at this time.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE&lt;br/&gt;&lt;br/&gt;Principal Investment Strategies&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">The Fund normally invests at least 80% of its assets, including borrowings for investment purposes, in equity securities of companies located in emerging market countries. The Fund will provide shareholders with at least 60 days&amp;#8217; notice before changing this 80% policy.&lt;br/&gt;&lt;br/&gt;Equity securities held by the Fund will primarily include common stock, preferred stock, depositary receipts, options on securities, and equity-equivalent securities, such as participatory notes (&amp;#8220;P-notes&amp;#8221;). Derivatives, such as futures, options on futures and swaps, may also be held by the Fund incidental to its main investment strategy.&lt;br/&gt;&lt;br/&gt;The Subadvisor considers emerging market countries to be those included in the Fund&amp;#8217;s benchmark index, the MSCI Emerging Markets Index; countries determined by the World Bank to have a low to middle income economy; and other countries or markets with similar emerging market characteristics as determined by the Subadvisor. A company is considered to be located in an emerging market country if it has a class of securities whose principal securities market is in an emerging market country; is organized under the laws of, or has a principal office in, an emerging market country; derives 50% or more of its total revenues or earnings from goods produced, sales made, or services provided in one or more emerging market countries; or maintains 50% or more of its assets in one or more emerging market countries.&lt;br/&gt;&lt;br/&gt;The Fund may invest in companies of any market capitalization size but seeks to have market capitalization size characteristics similar to that of the MSCI Emerging Markets Index. As of December 31, 2012, the market capitalization of the MSCI Emerging Markets Index companies ranged from $727 million to $259 billion with a weighted median level of $18.2 billion and a weighted average level of $48.1 billion. The Fund is expected to invest its assets among companies located in emerging markets throughout the world. The Fund may also invest in securities denominated in foreign currencies and may engage in foreign currency transactions.&lt;br/&gt;&lt;br/&gt;The Fund is &amp;#8220;non-diversified,&amp;#8221; which means it may invest a greater percentage of its assets in a particular issuer than a &amp;#8220;diversified&amp;#8221; fund.&lt;br/&gt;&lt;br/&gt;The Subadvisor seeks to identify companies located in emerging market countries that are trading at a discount to what the Subadvisor believes to be their intrinsic value but have the potential to increase their book value. To this end, the Subadvisor combines a top-down approach to country analysis with a bottom-up approach to fundamental company research. The country analysis includes an assessment of the risks and opportunities for each emerging market country through in-depth quantitative and qualitative analysis. In addition, the country research process produces a ranking of emerging markets countries based on expected returns with greater active weights allocated to higher-ranking countries. The fundamental company research also utilizes a number of qualitative and quantitative methods. Portfolio construction is determined by the Subadvisor based on its level of conviction in the country and company with input from proprietary risk models.&lt;br/&gt;&lt;br/&gt;The Fund may sell a security when it no longer appears attractive by the Subadvisor or does not meet the Fund&amp;#8217;s sustainability and corporate responsibility criteria.&lt;br/&gt;&lt;br/&gt;Sustainable and Responsible Investing. The Fund seeks to invest in emerging market companies whose products/services or industrial/ business practices contribute towards addressing one or more global sustainability challenges in their local and/or international markets, including development, poverty and health; environment and climate change; and rights and governance.&lt;br/&gt;&lt;br/&gt;Investments are first selected for financial soundness and then evaluated according to these sustainability and corporate responsibility criteria, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;Principal Risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;br/&gt;&lt;br/&gt;Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund.&lt;br/&gt;&lt;br/&gt;Management Risk. The individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result.&lt;br/&gt;&lt;br/&gt;Stock Market Risk. The market prices of stocks held by the Fund may fall.&lt;br/&gt;&lt;br/&gt;Market Capitalization Risks. Large-cap companies may be unable to respond quickly to new competitive challenges such as changes in technology, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. Prices of small-cap and mid-cap stocks can be more volatile than those of larger, more established companies. Small-cap and mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies. Prices of microcap securities are generally even more volatile and their markets are even less liquid relative to small-cap, mid-cap and large-cap securities.&lt;br/&gt;&lt;br/&gt;Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being.&lt;br/&gt;&lt;br/&gt;Preferred Stock Risk. The market value of preferred stock generally decreases when interest rates rise and is affected by the issuer&amp;#8217;s ability to make payments on the preferred stock.&lt;br/&gt;&lt;br/&gt;Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. Foreign securities include American Depositary Receipts (&amp;#8220;ADRs&amp;#8221;) and Global Depositary Receipts (&amp;#8220;GDRs&amp;#8221;). Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends.&lt;br/&gt;&lt;br/&gt;P-Note Risk. To the extent the Fund invests in P-notes, it is subject to certain risks in addition to the risks normally associated with a direct investment in the underlying foreign securities the P-note seeks to replicate. As the purchaser of a P-note, the Fund is relying on the creditworthiness of the counterparty issuing the P-note and does not have the same rights under a P-note as it would as a shareholder of the underlying issuer. Therefore, if a counterparty becomes insolvent, the Fund could lose the total value of its investment in the P-note. In addition, there is no assurance that there will be a trading market for a P-note or that the trading price of a P-note will equal the value of the underlying security.&lt;br/&gt;&lt;br/&gt;Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall. GDRs can involve direct currency risk since, unlike ADRs, they may not be U.S. dollar-denominated. ADRs indirectly bear currency risk because they represent an interest in securities that are not denominated in U.S. dollars.&lt;br/&gt;&lt;br/&gt;Foreign Currency Transactions Risk. Transactions in foreign currency in connection with the purchase and sale of investments in foreign markets may result in foreign currency exposure and the potential for losses due to fluctuations in currency exchange rates. These losses may occur without regard to the quality or performance of the investment itself. Foreign currency transactions may also prevent the Fund from realizing profits on favorable movements in exchange rates.&lt;br/&gt;&lt;br/&gt;Emerging Markets Risk. The risks of investing in emerging market securities are greater than those of investing in securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.&lt;br/&gt;&lt;br/&gt;Valuation Risk. A stock judged to be undervalued by the Subadvisor may actually be appropriately priced, and it may not appreciate as anticipated.&lt;br/&gt;&lt;br/&gt;Derivatives Risk. In general, a derivative is a financial contract whose value is based on the value of a financial asset (such as a stock, bond, or currency), a physical asset (such as gold), or a market index (such as the S&amp;amp;P 500 Index). Derivative instruments are subject to a number of risks, including the risk of changes in the market price of the underlying asset, credit risk with respect to the counterparty, and liquidity risk. The Fund&amp;#8217;s use of certain derivatives may also have a leveraging effect, which may increase the volatility of the Fund and reduce its returns.</rr:RiskNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;b&gt;Performance&lt;b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">Because the Fund has less than a full calendar year of investment operations, no performance information is presented for the Fund at this time.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceOneYearOrLess contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">Because the Fund has less than a full calendar year of investment operations, no performance information is presented for the Fund at this time.</rr:PerformanceOneYearOrLess>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAverageAnnualTotalReturnsTransposedCalvertCapitalAccumulationFundClassI column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;br /&gt;&lt;br /&gt;Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund.&lt;br /&gt;&lt;br /&gt;Management Risk. Individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result.&lt;br /&gt;&lt;br /&gt;Stock Market Risk. The market prices of stocks held by the Fund may fall.&lt;br /&gt;&lt;br /&gt;Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being.&lt;br /&gt;&lt;br /&gt;Mid-Cap Company Risk. Prices of mid-cap stocks can be more volatile than those of larger, more established companies. Mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies.&lt;br /&gt;&lt;br /&gt;Growth Company Risk. Prices of growth company securities may fall more than the overall equity markets due to changing economic, political or market conditions or disappointing growth company earnings results. Growth stocks also generally lack the dividends of some value stocks that can cushion stock prices in a falling market.&lt;br /&gt;&lt;br /&gt;Valuation Risk. A stock judged to be undervalued by the Subadvisor may actually be appropriately priced, and it may not appreciate as anticipated.&lt;br /&gt;&lt;br /&gt;Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets.&lt;br /&gt;&lt;br /&gt;Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall.</rr:RiskNarrativeTextBlock>
  <rr:RiskNondiversifiedStatus contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">Non-diversification Risk. Because the Fund may invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single stock may have greater impact on the Fund than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;CALVERT INTERNATIONAL EQUITY FUND &lt;/b&gt;&lt;br/&gt;&lt;b&gt;Class&lt;/b&gt;&amp;nbsp;&amp;nbsp;(Ticker):&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;I&lt;/b&gt; (CWVIX)</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The Fund seeks to provide a high total return consistent with reasonable risk by investing primarily in a diversified portfolio of stocks that meet the Fund&amp;#8217;s investment criteria, including financial, sustainability and social responsibility factors. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt; (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Annual Fund Operating Expenses&lt;/b&gt; (expenses that you pay each year as a&lt;br/&gt;% of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.009</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0019</rr:OtherExpensesOverAssets>
  <rr:AcquiredFundFeesAndExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0111</rr:ExpensesOverAssets>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Example&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertEmergingMarketsEquityFundClassI column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;CALVERT INTERNATIONAL OPPORTUNITIES FUND&lt;/b&gt; &lt;br/&gt;&lt;b&gt;Class&lt;/b&gt; (Ticker):&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;b&gt;I&lt;/b&gt; (COIIX)</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;INVESTMENT OBJECTIVE&lt;/b&gt;</rr:ObjectiveHeading>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertEmergingMarketsEquityFundClassI column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The Fund seeks long-term capital appreciation through holdings that meet the Fund&amp;#8217;s investment criteria, including financial, sustainability and social responsibility factors. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">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:&lt;ul type="square"&gt;&lt;li&gt;you invest $1,000,000 in the Fund for the time periods indicated;&lt;/li&gt;&lt;li&gt;your investment has a 5% return each year; and&lt;/li&gt;&lt;li&gt;the Fund&amp;#8217;s operating expenses remain the same.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;FEES AND EXPENSES OF THE FUND&lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="USD">11316</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="USD">35285</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="USD">61156</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="USD">135169</rr:ExpenseExampleYear10>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Portfolio Turnover&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 43% of its portfolio&amp;#8217;s average value.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member" unitRef="pure">0.43</rr:PortfolioTurnoverRate>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE&lt;/b&gt;&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Principal Investment Strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertEmergingMarketsEquityFundClassI column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The Fund normally invests at least 80% of its net assets, including borrowings for investment purposes, in equity securities of foreign companies (common and preferred stock and the depositary receipts on such stock). The Fund will provide shareholders with at least 60 days&amp;#8217; notice before changing this 80% policy. Using a core investment approach, the Fund invests primarily in common and preferred stocks of non-U.S. large-cap companies. The Fund defines non-U.S. large-cap companies as those whose market capitalization falls within the range of the Morgan Stanley Capital International (&amp;#8220;MSCI&amp;#8221;) Europe, Australasia and Far East (&amp;#8220;EAFE&amp;#8221;) Global Investable Market Index (&amp;#8220;IMI&amp;#8221;). As of December 31, 2012, the market capitalization of the MSCI EAFE IMI companies ranged from $47 million to $225 billion with a weighted median level of $28.3 billion and a weighted average level of $51.5 billion. MSCI Barra reassesses the MSCI EAFE IMI quarterly and conducts full updating reviews twice per year and partial reviews in the other two quarters. The Fund normally seeks to have a weighted average market capitalization of at least $10 billion.&lt;br/&gt;&lt;br/&gt;The Fund generally holds stocks of companies from the constituent countries of the MSCI EAFE IMI, but may invest in other countries, including emerging markets stocks. The Fund will invest in at least three different countries. The Advisor and the Subadvisors focus on deriving returns from individual stock selection (bottom-up). The Advisor and the Subadvisors utilize fundamental insights arrived at through qualitative and quantitative analysis of a broad range of non-U.S. securities to identify stocks expected to provide returns superior to that of the benchmark. The Advisor attempts to control the portfolio&amp;#8217;s risk level and maximize the Fund&amp;#8217;s return potential relative to the MSCI EAFE IMI benchmark by balancing the risks and opportunities among the portions of the portfolio managed by the Advisor and each Subadvisor. The Advisor may shift allocations among the Advisor and the Subadvisors depending on market conditions, the Advisor&amp;#8217;s or Subadvisors&amp;#8217; respective style biases, and performance opportunities.&lt;br/&gt;&lt;br/&gt;The Fund invests no more than 5% of its net assets in U.S. companies (excluding High Social Impact and Special Equities investments). See &amp;#8220;Special Investment Programs&amp;#8221; in this Prospectus.&lt;br/&gt;&lt;br/&gt;The Fund may invest in American Depositary Receipts (&amp;#8220;ADRs&amp;#8221;), which may be sponsored or unsponsored, and Global Depositary Receipts (&amp;#8220;GDRs&amp;#8221;).&lt;br/&gt;&lt;br/&gt;Sustainable and Socially Responsible Investing. The Fund seeks to invest in companies and other enterprises that demonstrate positive environmental, social and governance performance as they address corporate responsibility and sustainability challenges. Calvert believes that there are long-term benefits in an investment philosophy that attaches material weight to the environment, workplace relations, human rights, Indigenous Peoples&amp;#8217; rights, community relations, product safety and impact, and corporate governance and business ethics. Calvert also believes that managing risks and opportunities related to these issues can contribute positively to company performance as well as to investment performance over time. The Fund has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Fund seeks to invest and seeks to avoid investing.&lt;br/&gt;&lt;br/&gt;Investments are first selected for financial soundness and then evaluated according to the Fund&amp;#8217;s sustainable and socially responsible investment criteria. Investments must be consistent with the Fund&amp;#8217;s current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Principal Risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.02</rr:RedemptionFeeOverRedemption>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;br/&gt;&lt;br/&gt;Management Risk. Individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result. The Advisor&amp;#8217;s allocation of Fund assets among the portions of the portfolio managed by the Advisor and each Subadvisor may cause the Fund to underperform.&lt;br/&gt;&lt;br/&gt;Stock Market Risk. The market prices of stocks held by the Fund may fall.&lt;br/&gt;&lt;br/&gt;Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being.&lt;br/&gt;&lt;br/&gt;Preferred Stock Risk. The market value of preferred stock generally decreases when interest rates rise and is affected by the issuer&amp;#8217;s ability to make payments on the preferred stock.&lt;br/&gt;&lt;br/&gt;Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. Foreign securities include ADRs and GDRs. Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends.&lt;br/&gt;&lt;br/&gt;Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall. GDRs can involve direct currency risk since, unlike ADRs, they may not be U.S. dollar-denominated. ADRs indirectly bear currency risk because they represent an interest in securities that are not denominated in U.S. dollars.&lt;br/&gt;&lt;br/&gt;Foreign Currency Transactions Risk. Transactions in foreign currency in connection with the purchase and sale of investments in foreign markets may result in foreign currency exposure and the potential for losses due to fluctuations in currency exchange rates. These losses may occur without regard to the quality or performance of the investment itself. Foreign currency transactions may also prevent the Fund from realizing profits on favorable movements in exchange rates.&lt;br/&gt;&lt;br/&gt;Large-Cap Company Risk. Large-cap companies may be unable to respond quickly to new competitive challenges such as changes in technology, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.&lt;br/&gt;&lt;br/&gt;Emerging Markets Risk. The risks of investing in emerging market securities are greater than those of investing in securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.&lt;br/&gt;&lt;br/&gt;Multi-Manager Risk. While the Advisor monitors the overall management of the Fund, the Advisor and the Subadvisors make investment decisions independently from each other. It is possible that the Advisor&amp;#8217;s and each Subadvisor&amp;#8217;s investment styles may not always be complementary, which could affect the performance and transaction costs of the Fund.</rr:RiskNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Performance&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The following bar chart and table show the Fund&amp;#8217;s annual returns and its long-term performance, which give some indication of the risks of investing in the Fund. The bar chart shows how the performance of the Class I shares has varied from year to year. The table compares the Fund&amp;#8217;s performance over time with that of an index and an average.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. For updated performance information, visit www.calvert.com.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The bar chart shows how the performance of the Class I shares has varied from year to year.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">www.calvert.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Calendar Year Total Return&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;table style="WIDTH: 6in; FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 11pt" border="0" cellspacing="0"&gt;&lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="TEXT-INDENT: 0.225pt" align="right"&gt;&lt;b&gt;Quarter&lt;/b&gt;&lt;/td&gt;  &lt;td align="right"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/td&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="right"&gt;&lt;b&gt;Ended&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-INDENT: 2.438pt" align="right"&gt;&lt;b&gt;Return&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Best Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;6/30/09&lt;/td&gt;  &lt;td align="right"&gt;23.79 &lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Worst Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/08&lt;/td&gt;  &lt;td align="right"&gt;-23.93&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.3011</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.1829</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.1188</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.2747</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0252</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">-0.4598</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.2288</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0662</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">-0.1331</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.1849</rr:AnnualReturn2012>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member">Best Quarter (of periods shown)</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.2379</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member">Worst Quarter (of periods shown)</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">-0.2393</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account. The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;b&gt;Average Annual Total Returns&lt;/b&gt;&lt;br/&gt;&lt;b&gt;(as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.1849</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.1266</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.1849</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberMsciEafeImi_MemberClassI_Member" unitRef="pure">0.182</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberLipperInternationalMultiCapGrowthFundsAvg_MemberClassI_Member" unitRef="pure">0.1803</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">-0.0618</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">-0.061</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">-0.0485</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberMsciEafeImi_MemberClassI_Member" unitRef="pure">-0.029</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberLipperInternationalMultiCapGrowthFundsAvg_MemberClassI_Member" unitRef="pure">-0.0303</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0505</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0464</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000008724_MemberC000023779_MemberClassI_Member" unitRef="pure">0.0463</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberMsciEafeImi_MemberClassI_Member" unitRef="pure">0.0908</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberLipperInternationalMultiCapGrowthFundsAvg_MemberClassI_Member" unitRef="pure">0.0872</rr:AverageAnnualReturnYear10>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.0095</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.0075</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.017</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_28" decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.005</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.012</rr:NetExpensesOverAssets>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertInternationalEquityFundClassI column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertInternationalEquityFundClassI column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertInternationalEquityFundClassI column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Example&lt;/b&gt;</rr:ExpenseExampleHeading>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualTotalReturnsCalvertInternationalEquityFundClassIBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAverageAnnualTotalReturnsTransposedCalvertInternationalEquityFundClassI column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="USD">12228</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="USD">48694</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="USD">87607</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="USD">196697</rr:ExpenseExampleYear10>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Portfolio Turnover&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 56% of its portfolio&amp;#8217;s average value.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE&lt;/b&gt;&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Principal Investment Strategies&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The Fund invests primarily in common and preferred stocks of non-U.S. small-cap to mid-cap companies, which the Fund defines as companies whose market capitalization falls within the range of the Morgan Stanley Capital International (&amp;#8220;MSCI&amp;#8221;) Europe, Australasia and Far East (&amp;#8220;EAFE&amp;#8221;) Small-Mid (&amp;#8220;SMID&amp;#8221;) Index. As of December 31, 2012, the market capitalization of the MSCI EAFE SMID companies ranged from $43 million to $41 billion with a weighted median level of $3.6 billion and a weighted average level of $4.6 billion. MSCI Barra reassesses the MSCI EAFE SMID Index quarterly and conducts full updating reviews twice per year and partial reviews in the other two quarters.&lt;br/&gt;&lt;br/&gt;The Fund normally seeks to have a weighted average market capitalization between $2 billion and $5 billion.&lt;br/&gt;&lt;br/&gt;The Fund invests no more than 10% of its net assets in U.S. companies (excluding High Social Impact and Special Equities investments). See &amp;#8220;Special Investment Programs&amp;#8221; in this Prospectus.&lt;br/&gt;&lt;br/&gt;The Fund primarily holds stocks of companies in developed countries but as an internationally diverse fund, it may invest in any geographic region of the world (at least three different countries) if a Subadvisor deems the company attractive. The stock selection process of each Subadvisor does not utilize a predetermined geographic allocation, and each Subadvisor primarily uses a bottom-up approach focused on fundamental analysis of stocks of individual companies across all geographic regions. The Advisor attempts to control the portfolio&amp;#8217;s risk level and maximize the Fund&amp;#8217;s return potential relative to the MSCI EAFE SMID benchmark by balancing the risks and opportunities between the portion of the portfolio managed by each Subadvisor. The Advisor may shift allocations between the Subadvisors depending on market conditions, the Subadvisors&amp;#8217; respective style biases, and performance opportunities. The Fund may invest up to 20% of its assets in securities of issuers in emerging market countries. The securities in which the Fund invests are often denominated and traded in foreign currencies.&lt;br/&gt;&lt;br/&gt;Attractive companies are identified through a combination of valuation and growth metrics that seeks to identify companies with a sustainable competitive advantage. Stocks chosen for the Fund combine growth and value characteristics or offer the opportunity to buy growth at a reasonable price.&lt;br/&gt;&lt;br/&gt;The Fund may invest in American Depositary Receipts (&amp;#8220;ADRs&amp;#8221;), which may be sponsored or unsponsored, and Global Depositary Receipts (&amp;#8220;GDRs&amp;#8221;).&lt;br/&gt;&lt;br/&gt;Sustainable and Socially Responsible Investing. The Fund seeks to invest in companies and other enterprises that demonstrate positive environmental, social and governance performance as they address corporate responsibility and sustainability challenges. Calvert believes that there are long-term benefits in an investment philosophy that attaches material weight to the environment, workplace relations, human rights, Indigenous Peoples&amp;#8217; rights, community relations, product safety and impact, and corporate governance and business ethics. Calvert also believes that managing risks and opportunities related to these issues can contribute positively to company performance as well as to investment performance over time. The Fund has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Fund seeks to invest and seeks to avoid investing.&lt;br/&gt;&lt;br/&gt;Investments are first selected for financial soundness and then evaluated according to the Fund&amp;#8217;s sustainable and socially responsible investment criteria. Investments must be consistent with the Fund&amp;#8217;s current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Principal Risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;br/&gt;&lt;br/&gt;Management Risk. Individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result. The Advisor&amp;#8217;s allocation of Fund assets between the portion of the portfolio managed by each Subadvisor may cause the Fund to underperform.&lt;br/&gt;&lt;br/&gt;Stock Market Risk. The market prices of stocks held by the Fund may fall.&lt;br/&gt;&lt;br/&gt;Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being.&lt;br/&gt;&lt;br/&gt;Preferred Stock Risk. The market value of preferred stock generally decreases when interest rates rise and is affected by the issuer&amp;#8217;s ability to make payments on the preferred stock.&lt;br/&gt;&lt;br/&gt;Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. Foreign securities include ADRs and GDRs. Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends.&lt;br/&gt;&lt;br/&gt;Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall. GDRs can involve direct currency risk since, unlike ADRs, they may not be U.S. dollar-denominated. ADRs indirectly bear currency risk because they represent an interest in securities that are not denominated in U.S. dollars.&lt;br/&gt;&lt;br/&gt;Foreign Currency Transactions Risk. Transactions in foreign currency in connection with the purchase and sale of investments in foreign markets may result in foreign currency exposure and the potential for losses due to fluctuations in currency exchange rates. These losses may occur without regard to the quality or performance of the investment itself. Foreign currency transactions may also prevent the Fund from realizing profits on favorable movements in exchange rates.&lt;br/&gt;&lt;br/&gt;Emerging Markets Risk. The risks of investing in emerging market securities are greater than those of investing in securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.&lt;br/&gt;&lt;br/&gt;Small-Cap and Mid-Cap Company Risk. Prices of small-cap and mid-cap stocks can be more volatile than those of larger, more established companies. Small-cap and mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies.&lt;br/&gt;&lt;br/&gt;Growth Company Risk. Prices of growth company securities may fall more than the overall equity markets due to changing economic, political or market conditions or disappointing growth company earnings results. Growth stocks also generally lack the dividends of some value stocks that can cushion stock prices in a falling market.&lt;br/&gt;&lt;br/&gt;Valuation Risk. A stock judged to be undervalued by a Subadvisor may actually be appropriately priced, and it may not appreciate as anticipated.&lt;br/&gt;&lt;br/&gt;Multi-Manager Risk. While the Advisor monitors the overall management of the Fund, the Subadvisors make investment decisions independently from each other. It is possible that the Subadvisors&amp;#8217; investment styles may not always be complementary, which could affect the performance and transaction costs of the Fund.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Performance&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The following bar chart and table show the Fund&amp;#8217;s annual returns and its long-term performance, which give some indication of the risks of investing in the Fund. The bar chart shows how the performance of the Class I shares has varied from year to year. The table compares the Fund&amp;#8217;s performance over time with that of an index and an average.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. For updated performance information, visit www.calvert.com.&lt;br/&gt;&lt;br/&gt;After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account. The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;table style="WIDTH: 6in; FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 11pt" border="0" cellspacing="0"&gt;&lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="TEXT-INDENT: 0.225pt" align="right"&gt;&lt;b&gt;Quarter&lt;/b&gt;&lt;/td&gt;  &lt;td align="right"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/td&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="right"&gt;&lt;b&gt;Ended&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-INDENT: 2.438pt" align="right"&gt;&lt;b&gt;Return&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Best Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;6/30/09&lt;/td&gt;  &lt;td align="right"&gt;24.14&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Worst Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/08&lt;/td&gt;  &lt;td align="right"&gt;-24.10&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Calendar Year Total Returns&lt;/b&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Average Annual Total Returns&lt;/b&gt;&lt;br/&gt;&lt;b&gt;(as of 12/31/12)&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.2553</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.2545</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.1713</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberMsciEafeSmidIndex_Member" unitRef="pure">0.1943</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">0.1982</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.0216</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.0164</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.0218</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberMsciEafeSmidIndex_Member" unitRef="pure">-0.0171</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">-0.0154</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.013</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.0128</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.0091</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberMsciEafeSmidIndex_Member" unitRef="pure">-0.0289</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">-0.0262</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047592_MemberClassI_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047592_MemberClassI_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:ShareholderFeesCaption contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Shareholder Fees&lt;/b&gt; (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;b&gt;Annual Fund Operating Expenses&lt;/b&gt; (expenses that you pay each year as a&lt;br/&gt; % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member">Best Quarter (of periods shown)</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.2414</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member">Worst Quarter (of periods shown)</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.241</rr:BarChartLowestQuarterlyReturn>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member" unitRef="pure">0.56</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The bar chart shows how the performance of the Class I shares has varied from year to year.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">www.calvert.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertInternationalOpportunitiesFundClassI column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertInternationalOpportunitiesFundClassI column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertInternationalOpportunitiesFundClassI column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAverageAnnualTotalReturnsTransposedCalvertInternationalOpportunitiesFundClassI column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualTotalReturnsCalvertInternationalOpportunitiesFundClassIBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.4355</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.3539</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.1319</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">-0.1755</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047592_MemberClassI_Member" unitRef="pure">0.2553</rr:AnnualReturn2012>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_Member">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:&lt;ul type="square"&gt;&lt;li&gt;you invest $1,000,000 in the Fund for the time periods indicated;&lt;/li&gt;&lt;li&gt;your investment has a 5% return each year;&lt;/li&gt;&lt;li&gt;the Fund&amp;#8217;s operating expenses remain the same; and&lt;/li&gt;&lt;li&gt;any Calvert expense limitation is in effect for the period indicated in the fee table above.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberMsciEafeSmidIndex_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassI_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassI_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000038363_MemberClassAcy_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The Fund seeks long-term capital appreciation through holdings that meet the Fund&amp;#8217;s investment criteria, including financial, sustainability and social responsibility factors. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Portfolio Turnover&lt;/b&gt;</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The Fund pays transaction costs, such as commissions, when it buys and sells securities (&amp;#8220;turns over&amp;#8221; its 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 &amp;#8220;Example&amp;#8221;, affect the Fund&amp;#8217;s performance. During the most recent fiscal year, the Fund&amp;#8217;s portfolio turnover rate was 56% of its portfolio&amp;#8217;s average value.</rr:PortfolioTurnoverTextBlock>
  <rr:PortfolioTurnoverRate decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member" unitRef="pure">0.56</rr:PortfolioTurnoverRate>
  <rr:StrategyHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;INVESTMENTS, RISKS AND PERFORMANCE&lt;br/&gt;&lt;br/&gt;Principal Investment Strategies&lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The Fund invests primarily in common and preferred stocks of non-U.S. small-cap to mid-cap companies, which the Fund defines as companies whose market capitalization falls within the range of the Morgan Stanley Capital International (&amp;#8220;MSCI&amp;#8221;) Europe, Australasia and Far East (&amp;#8220;EAFE&amp;#8221;) Small-Mid (&amp;#8220;SMID&amp;#8221;) Index. As of December 31, 2012, the market capitalization of the MSCI EAFE SMID companies ranged from $43 million to $41 billion with a weighted median level of $3.6 billion and a weighted average level of $4.6 billion. MSCI Barra reassesses the MSCI EAFE SMID Index quarterly and conducts full updating reviews twice per year and partial reviews in the other two quarters. The Fund normally seeks to have a weighted average market capitalization between $2 billion and $5 billion.&lt;br/&gt;&lt;br/&gt;The Fund invests no more than 10% of its net assets in U.S. companies (excluding High Social Impact and Special Equities investments). See &amp;#8220;Special Investment Programs&amp;#8221; in this Prospectus.&lt;br/&gt;&lt;br/&gt;The Fund primarily holds stocks of companies in developed countries but as an internationally diverse fund, it may invest in any geographic region of the world (at least three different countries) if a Subadvisor deems the company attractive. The stock selection process of each Subadvisor does not utilize a predetermined geographic allocation, and each Subadvisor primarily uses a bottom-up approach focused on fundamental analysis of stocks of individual companies across all geographic regions. The Advisor attempts to control the portfolio&amp;#8217;s risk level and maximize the Fund&amp;#8217;s return potential relative to the MSCI EAFE SMID benchmark by balancing the risks and opportunities between the portion of the portfolio managed by each Subadvisor. The Advisor may shift allocations between the Subadvisors depending on market conditions, the Subadvisors' respective style biases, and performance opportunities. The Fund may invest up to 20% of its assets in securities of issuers in emerging market countries. The securities in which the Fund invests are often denominated and traded in foreign currencies.&lt;br/&gt;&lt;br/&gt;Attractive companies are identified through a combination of valuation and growth metrics that seeks to identify companies with a sustainable competitive advantage. Stocks chosen for the Fund combine growth and value characteristics or offer the opportunity to buy growth at a reasonable price.&lt;br/&gt;&lt;br/&gt;The Fund may invest in American Depositary Receipts (&amp;#8220;ADRs&amp;#8221;), which may be sponsored or unsponsored, and Global Depositary Receipts (&amp;#8220;GDRs&amp;#8221;).&lt;br/&gt;&lt;br/&gt;Sustainable and Socially Responsible Investing. The Fund seeks to invest in companies and other enterprises that demonstrate positive environmental, social and governance performance as they address corporate responsibility and sustainability challenges. Calvert believes that there are long-term benefits in an investment philosophy that attaches material weight to the environment, workplace relations, human rights, Indigenous Peoples&amp;#8217; rights, community relations, product safety and impact, and corporate governance and business ethics. Calvert also believes that managing risks and opportunities related to these issues can contribute positively to company performance as well as to investment performance over time. The Fund has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Fund seeks to invest and seeks to avoid investing.&lt;br/&gt;&lt;br/&gt;Investments are first selected for financial soundness and then evaluated according to the Fund&amp;#8217;s sustainable and socially responsible investment criteria. Investments must be consistent with the Fund&amp;#8217;s current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Fund and its shareholders.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Principal Risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;br/&gt;&lt;br/&gt;Management Risk. Individual investments of the Fund may not perform as expected, and the Fund&amp;#8217;s portfolio management practices may not achieve the desired result. The Advisor&amp;#8217;s allocation of Fund assets between the portion of the portfolio managed by each Subadvisor may cause the Fund to underperform.&lt;br/&gt;&lt;br/&gt;Stock Market Risk. The market prices of stocks held by the Fund may fall.&lt;br/&gt;&lt;br/&gt;Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company&amp;#8217;s financial condition, on overall market and economic conditions, and on investors&amp;#8217; perception of a company&amp;#8217;s well-being.&lt;br/&gt;&lt;br/&gt;Preferred Stock Risk. The market value of preferred stock generally decreases when interest rates rise and is affected by the issuer&amp;#8217;s ability to make payments on the preferred stock.&lt;br/&gt;&lt;br/&gt;Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets. Foreign securities include ADRs and GDRs. Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends.&lt;br/&gt;&lt;br/&gt;Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall. GDRs can involve direct currency risk since, unlike ADRs, they may not be U.S. dollar-denominated. ADRs indirectly bear currency risk because they represent an interest in securities that are not denominated in U.S. dollars.&lt;br/&gt;&lt;br/&gt;Foreign Currency Transactions Risk. Transactions in foreign currency in connection with the purchase and sale of investments in foreign markets may result in foreign currency exposure and the potential for losses due to fluctuations in currency exchange rates. These losses may occur without regard to the quality or performance of the investment itself. Foreign currency transactions may also prevent the Fund from realizing profits on favorable movements in exchange rates.&lt;br/&gt;&lt;br/&gt;Emerging Markets Risk. The risks of investing in emerging market securities are greater than those of investing in securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.&lt;br/&gt;&lt;br/&gt;Small-Cap and Mid-Cap Company Risk. Prices of small-cap and mid-cap stocks can be more volatile than those of larger, more established companies. Small-cap and mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies.&lt;br/&gt;&lt;br/&gt;Growth Company Risk. Prices of growth company securities may fall more than the overall equity markets due to changing economic, political or market conditions or disappointing growth company earnings results. Growth stocks also generally lack the dividends of some value stocks that can cushion stock prices in a falling market.&lt;br/&gt;&lt;br/&gt;Valuation Risk. A stock judged to be undervalued by a Subadvisor may actually be appropriately priced, and it may not appreciate as anticipated.&lt;br/&gt;&lt;br/&gt;Multi-Manager Risk. While the Advisor monitors the overall management of the Fund, the Subadvisors make investment decisions independently from each other. It is possible that the Subadvisors' investment styles may not always be complementary, which could affect the performance and transaction costs of the Fund.</rr:RiskNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Performance&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The following bar chart and table show the Fund&amp;#8217;s annual returns and its long-term performance, which give some indication of the risks of investing in the Fund. The bar chart shows how the performance of the Class A shares has varied from year to year. The table compares the Fund&amp;#8217;s performance over time with that of an index and an average.&lt;br/&gt;&lt;br/&gt;The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. For updated performance information, visit www.calvert.com.&lt;br/&gt;&lt;br/&gt;Performance results for Class Y shares prior to 10/31/08 (the Class Y shares&amp;#8217; inception date) reflect the performance of Class A shares at net asset value. Actual Class Y share performance would have been higher than Class A share performance because Class Y, unlike Class A, has no Rule 12b-1 fees.&lt;br/&gt;&lt;br/&gt;The return for each of the Fund&amp;#8217;s other Classes of shares will differ from the Class A returns shown in the bar chart, depending upon the expenses of that Class. The bar chart does not reflect any sales charge that you may be required to pay upon purchase or redemption of the Fund&amp;#8217;s shares. Any sales charge will reduce your return.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The bar chart shows how the performance of the Class A shares has varied from year to year.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">www.calvert.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The Fund&amp;#8217;s past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Calendar Year Total Returns for Class A at NAV&lt;/b&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;table style="WIDTH: 6in;" border="0" cellspacing="0"&gt;&lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="TEXT-INDENT: 0.225pt" align="right"&gt;&lt;b&gt;Quarter&lt;/b&gt;&lt;/td&gt;  &lt;td align="right"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/td&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="right"&gt;&lt;b&gt;Ended&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-INDENT: 2.438pt" align="right"&gt;&lt;b&gt;Return&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Best Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;6/30/09&lt;/td&gt;  &lt;td align="right"&gt;24.05&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Worst Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/08&lt;/td&gt;  &lt;td align="right"&gt;-24.15&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The average total return table shows the Fund&amp;#8217;s returns with the maximum sales charge deducted, and no sales charge has been applied to the indices used for comparison in the table.&lt;br/&gt;&lt;br/&gt;After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account. The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares. After-tax returns are shown only for Class A shares; after-tax returns for other Classes will vary.</rr:PerformanceTableNarrativeTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member">Best Quarter (of periods shown)</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member">2009-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.2405</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member">Worst Quarter (of periods shown)</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.2415</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">After-tax returns are shown only for Class A shares; after-tax returns for other Classes will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassI_Member">January 31, 2014</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.1905</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.1899</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.1282</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">0.2525</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberMsciEafeSmidIndex_Member" unitRef="pure">0.1943</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">0.1982</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.0355</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.0358</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.0293</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">-0.0244</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberMsciEafeSmidIndex_Member" unitRef="pure">-0.0171</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">-0.0154</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.026</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.0262</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.0213</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member" unitRef="pure">-0.0159</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberMsciEafeSmidIndex_Member" unitRef="pure">-0.0289</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">-0.0262</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributions_MemberS000017170_MemberC000047589_MemberClassAcy_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013AfterTaxesOnDistributionsAndSales_MemberS000017170_MemberC000047589_MemberClassAcy_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberMsciEafeSmidIndex_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000073561_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member">2007-05-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">0.2283</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberMsciEafeSmidIndex_Member" unitRef="pure">0.1943</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">0.1982</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">-0.0342</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberMsciEafeSmidIndex_Member" unitRef="pure">-0.0171</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">-0.0154</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member" unitRef="pure">-0.0229</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberMsciEafeSmidIndex_Member" unitRef="pure">-0.0262</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member" unitRef="pure">-0.0275</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_Member">2007-07-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberMsciEafeSmidIndex_Member">2007-07-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047591_MemberClassAcy_MemberLipperInternationalSmallMidCapCoreFundsAvg_Member">2007-07-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.438</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.3487</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.1258</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">-0.1787</rr:AnnualReturn2011>
  <rr:AnnualReturn2012 decimals="4" contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberC000047589_MemberClassAcy_Member" unitRef="pure">0.2498</rr:AnnualReturn2012>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertInternationalEquityFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertInternationalEquityFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertInternationalEquityFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;b&gt;Average Annual Total Returns Since&lt;br/&gt;(as of 12/31/12) (with maximum&lt;br/&gt;sales charge deducted, if any&lt;/b&gt;</rr:PerformanceTableHeading>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleNoRedemptionTransposedCalvertInternationalEquityFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">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: &lt;ul type="square"&gt;&lt;li&gt;you invest $10,000 in the Fund for the time periods indicated and then either redeem or hold your shares at the end of those periods;  &lt;/li&gt;&lt;li&gt;your investment has a 5% return each year; and&lt;/li&gt;&lt;li&gt;the Fund&amp;#8217;s operating expenses remain the same.&lt;/li&gt;&lt;/ul&gt;Although your actual costs may be higher or lower, under these assumptions your costs would be:</rr:ExpenseExampleNarrativeTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualTotalReturnsCalvertInternationalEquityFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAverageAnnualTotalReturnsTransposedCalvertInternationalEquityFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleShareholderFeesCalvertInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualFundOperatingExpensesCalvertInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleTransposedCalvertInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleExpenseExampleNoRedemptionTransposedCalvertInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">The Fund seeks to provide a high total return consistent with reasonable risk by investing primarily in a diversified portfolio of stocks that meet the Fund&amp;#8217;s investment criteria, including financial, sustainability and social responsibility factors. This objective may be changed by the Fund&amp;#8217;s Board of Directors without shareholder approval.</rr:ObjectivePrimaryTextBlock>
  <rr:PerformanceTableExplanationAfterTaxHigher contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.</rr:PerformanceTableExplanationAfterTaxHigher>
  <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">After-tax returns are shown only for Class A shares; after-tax returns for other Classes will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Calvert mutual funds that are not money market funds. More information about these and other discounts is available from your financial professional and under &amp;#8220;Choosing a Share Class&amp;#8221; on page 89 and &amp;#8220;Reduced Sales Charges&amp;#8221; on page 92 of this Prospectus, and under &amp;#8220;Method of Distribution&amp;#8221; on page 50 of the Fund&amp;#8217;s Statement of Additional Information (&amp;#8220;SAI&amp;#8221;).</rr:ExpenseNarrativeTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAnnualTotalReturnsCalvertInternationalOpportunitiesFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">&lt;div style="display:none"&gt;~ http://www.calvert.com/role/ScheduleAverageAnnualTotalReturnsTransposedCalvertInternationalOpportunitiesFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">&lt;table style="WIDTH: 6in;" border="0" cellspacing="0"&gt;&lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="TEXT-INDENT: 0.225pt" align="right"&gt;&lt;b&gt;Quarter&lt;/b&gt;&lt;/td&gt;  &lt;td align="right"&gt;&lt;b&gt;Total&lt;/b&gt;&lt;/td&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;&amp;nbsp;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="right"&gt;&lt;b&gt;Ended&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid; TEXT-INDENT: 2.438pt" align="right"&gt;&lt;b&gt;Return&lt;/b&gt;&lt;/td&gt;  &lt;td style="BORDER-BOTTOM: #000000 1px solid" align="left"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Best Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/10&lt;/td&gt;  &lt;td align="right"&gt;16.97&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;  &lt;tr valign="bottom"&gt;  &lt;td align="left"&gt;Worst Quarter (of periods shown)&lt;/td&gt;  &lt;td align="right"&gt;12/31/08&lt;/td&gt;  &lt;td align="right"&gt;-25.22&lt;/td&gt;  &lt;td align="left"&gt;%&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</rr:BarChartClosingTextBlock>
  <rr:BarChartDoesNotReflectSalesLoads contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The bar chart does not reflect any sales charge that you may be required to pay upon purchase or redemption of the Fund&amp;#8217;s shares. Any sales charge will reduce your return.</rr:BarChartDoesNotReflectSalesLoads>
  <rr:PerformanceTableDoesReflectSalesLoads contextRef="Duration_01Feb2012_31Jan2013S000017170_MemberClassAcy_Member">The average total return table shows the Fund&amp;#8217;s returns with the maximum sales charge deducted, and no sales charge has been applied to the indices used for comparison in the table.</rr:PerformanceTableDoesReflectSalesLoads>
  <rr:PerformanceTableDoesReflectSalesLoads contextRef="Duration_01Feb2012_31Jan2013S000008725_MemberClassAbcAndY_Member">The average total return table shows the Fund&amp;#8217;s returns with the maximum sales charge deducted, and no sales charge has been applied to the indices used for comparison in the table.</rr:PerformanceTableDoesReflectSalesLoads>
  <rr:PerformanceTableOneClassOfAfterTaxShown contextRef="Duration_01Feb2012_31Jan2013S000008724_MemberClassAbcAndY_Member">After-tax returns are shown only for Class A shares; after-tax returns for other Classes will vary.</rr:PerformanceTableOneClassOfAfterTaxShown>
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    <link:loc xlink:type="locator" xlink:href="#Item_2" xlink:label="MaximumDeferredSalesChargeOverOther" />
    <link:footnote xlink:type="resource" xlink:label="footnote_MaximumDeferredSalesChargeOverOther" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_MaximumDeferredSalesChargeOverOther">The contingent deferred sales charge reduces over time. </link:footnote>
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    <link:loc xlink:type="locator" xlink:href="#Item_5" xlink:label="Item_5_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_10" xlink:label="Item_10_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_14" xlink:label="Item_14_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_15" xlink:label="Item_15_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_16" xlink:label="Item_16_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_20" xlink:label="Item_20_lbl" />
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    <link:loc xlink:type="locator" xlink:href="#Item_21" xlink:label="Item_21_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_21_lbl" xlink:to="footnote_MaximumDeferredSalesChargeOverOther" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_22" xlink:label="Item_22_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_22_lbl" xlink:to="footnote_MaximumDeferredSalesChargeOverOther" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_6" xlink:label="FeeWaiverOrReimbursementOverAssets" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets">The investment advisor has agreed to contractually limit direct net annual fund operating expenses for Class Y to 1.39% through January 31, 2014. These expense limitations do not limit the acquired fund fees and expenses paid indirectly by a shareholder. Only the Board of Directors of the Fund may terminate the Fund's expense limitation before the contractual period expires. </link:footnote>
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    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_9_lbl" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_17" xlink:label="FeeWaiverOrReimbursementOverAssets_2" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets_2" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets_2">The investment advisor has agreed to contractually limit direct net annual fund operating expenses for Class A, Class C, and Class Y through January 31, 2014. Direct net operating expenses will not exceed 1.66% for Class A, 2.50% for Class C, and 1.41% for Class Y. Calvert has further agreed to contractually limit direct net actual fund operating expenses for Class Y to 3.00% through January 31, 2023. Only the Board of Directors of the Fund may terminate the Fund's expense limitation before the contractual period expires. </link:footnote>
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    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_18_lbl" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_2" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_19" xlink:label="Item_19_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_19_lbl" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_2" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_23" xlink:label="FeeWaiverOrReimbursementOverAssets_3" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets_3" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets_3">The investment advisor has agreed to contractually limit direct net annual fund operating expenses for Class A, Class C and Class Y through January 31, 2014. Direct net operating expenses will not exceed 1.78% for Class A, 2.78% for Class C and 1.53% for Class Y. Calvert has further agreed to contractually limit direct net annual fund operating expenses for Class Y to 3.00% through January 31, 2023. Only the Board of Directors of the Fund may terminate the Fund's expense limitation before the contractual period expires. </link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="FeeWaiverOrReimbursementOverAssets_3" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_3" />
    <link:loc xlink:type="locator" xlink:href="#Item_24" xlink:label="Item_24_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_24_lbl" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_3" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_25" xlink:label="Item_25_lbl" />
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_25_lbl" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_3" use="optional" priority="0" order="1.0" />
    <link:loc xlink:type="locator" xlink:href="#Item_27" xlink:label="FeeWaiverOrReimbursementOverAssets_4" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets_4" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets_4">The investment advisor has agreed to contractually limit direct net annual fund operating expenses to 1.43% through January 31, 2014. Only the Board of Directors of the Fund may terminate the Fund's expense limitation before the contractual period expires. </link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="FeeWaiverOrReimbursementOverAssets_4" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_4" />
    <link:loc xlink:type="locator" xlink:href="#Item_26" xlink:label="FeeWaiverOrReimbursementOverAssets_5" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets_5" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets_5">The investment advisor has agreed to contractually limit direct net annual fund operating expenses to 0.86% through January 31, 2014. Only the Board of Directors of the Fund may terminate the Fund's expense limitation before the contractual period expires.</link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="FeeWaiverOrReimbursementOverAssets_5" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_5" />
    <link:loc xlink:type="locator" xlink:href="#Item_28" xlink:label="FeeWaiverOrReimbursementOverAssets_6" />
    <link:footnote xlink:type="resource" xlink:label="footnote_FeeWaiverOrReimbursementOverAssets_6" xlink:role="http://www.xbrl.org/2003/role/footnote" xml:lang="en-US" id="footnote_FeeWaiverOrReimbursementOverAssets_6">The investment advisor has agreed to contractually limit direct net annual fund operating expenses to 1.20% through January 31, 2014. Only the Board of Directors of the Fund may terminate the Fund's expense limitation before the contractual period expires. </link:footnote>
    <link:footnoteArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="FeeWaiverOrReimbursementOverAssets_6" xlink:to="footnote_FeeWaiverOrReimbursementOverAssets_6" />
  </link:footnoteLink>
</xbrl>
