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Label Element Value
Prospectus: rr_ProspectusTable  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Dec. 31, 2015
Entity Registrant Name dei_EntityRegistrantName CALVERT VARIABLE SERIES INC
Central Index Key dei_EntityCentralIndexKey 0000708950
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate May 01, 2016
Document Effective Date dei_DocumentEffectiveDate May 01, 2016
Prospectus Date rr_ProspectusDate May 01, 2016
Calvert VP SRI Mid Cap Growth Portfolio  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading CALVERT VP SRI MID CAP GROWTH PORTFOLIO   
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Portfolio seeks to provide long-term capital appreciation by investing primarily in a portfolio of the equity securities of mid-sized companies that are undervalued but demonstrate a potential for growth.
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE PORTFOLIO
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you invest in shares of the Portfolio.
The table and the following example do not reflect fees and charges imposed under the variable annuity contracts and life insurance policies (each a “Policy”) through which an investment may be made. If those fees and charges were included, costs would be higher. Please consult the prospectus for your Policy for information regarding those fees and charges.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (“turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the “Example”, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 94% of its portfolio’s average value.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 94.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The example assumes that:
•
you invest $10,000 in the Portfolio for the time periods indicated;
•
your investment has a 5% return each year; and
•
the Portfolio’s operating expenses remain the same.
Although your actual costs may be higher or lower, under these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading INVESTMENTS, RISKS AND PERFORMANCE Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Portfolio normally invests at least 80% of its net assets, including borrowings for investment purposes, in the common stocks of mid-cap companies. The Portfolio will provide shareholders with at least 60 days’ notice before changing this 80% policy. The Portfolio currently defines mid-cap companies as those whose market capitalization falls within the range of the Russell Midcap Growth Index at the time of investment. As of December 31, 2015, the market capitalization of the Russell Midcap Growth Index companies ranged from $718 million to $30.2 billion with a weighted average level of $13.3 billion.
Stocks chosen for the Portfolio combine growth and value characteristics or offer the opportunity to buy growth at a reasonable price. The Portfolio may also invest up to 25% of its net assets in foreign securities.
The Portfolio is “non-diversified,” which means it may hold securities of a smaller number of issuers and invest a greater percentage of its assets in a particular issuer than a “diversified” fund.
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.
Responsible Investing. The Portfolio 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’ 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 Portfolio has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Portfolio seeks to invest and seeks to avoid investing.
Investments are first selected for financial soundness and then evaluated according to the Portfolio’s sustainable and socially responsible investment criteria. Investments must be consistent with the Portfolio’s current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Portfolio and its shareholders.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
You could lose money on your investment in the Portfolio, or the Portfolio could underperform, because of the risks described below. An investment in the Portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Non-Diversification Risk. Because the Portfolio may hold securities of a smaller number of issuers or invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single security may have greater impact on the Portfolio than on a diversified fund.
Management Risk. Individual investments of the Portfolio may not perform as expected, and the portfolio management practices may not achieve the desired result.
Stock Market Risk. The market prices of stocks held by the Portfolio may fall.
Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company’s financial condition, on overall market and economic conditions, and on investors’ perception of a company’s well-being.
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.
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.
Value Stock Risk. Value stocks may perform differently from the market as a whole, which may not recognize a stock's intrinsic value for an unexpectedly long time. In addition, there is a risk that the portfolio manager's calculation of the stock's underlying value will not be reflected in the market price.
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 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.
Responsible Investing Risk. Investing primarily in responsible investment carries the risk that, under certain market conditions, the Portfolio may underperform funds that do not utilize a responsible investment strategy. The application of responsible investment principles may affect the Portfolio’s exposure to certain sectors or types of investments and may impact the Portfolio’s relative investment performance depending on whether such sectors or investments are in or out of favor in the market. A company’s ESG performance or the Advisor’s assessment of a company’s ESG performance may change over time, which could cause the Portfolio to temporarily hold securities that do not comply with the Portfolio’s responsible investment principles. In evaluating a company, the Advisor is dependent upon information and data that may be incomplete, inaccurate or unavailable, which could cause the Advisor to incorrectly assess a company’s ESG performance. Successful application of the Portfolio’s responsible investment strategy will depend on the Advisor’s skill in properly identifying and analyzing material ESG issues.

Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Portfolio, or the Portfolio could underperform, because of the risks described below.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk. Because the Portfolio may hold securities of a smaller number of issuers or invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single security may have greater impact on the Portfolio than on a diversified fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table show the Portfolio’s annual returns and its long-term performance, which give some indication of the risks of investing in the Portfolio. The bar chart shows how the performance has varied from year to year. The table compares the Portfolio’s performance over time with that of a benchmark and a performance average of similar mutual funds. The performance reflected in the bar chart and table assumes the reinvestment of dividends and capital gains distributions, if any.
The Portfolio’s past performance does not necessarily indicate how the Portfolio will perform in the future. For updated performance information, visit www.calvert.com.
The returns shown do not reflect fees and charges imposed under the variable annuity contracts and life insurance policies through which an investment may be made. If those fees and charges were included, they would reduce these returns.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table show the Portfolio’s annual returns and its long-term performance, which give some indication of the risks of investing in the Portfolio. The bar chart shows how the performance has varied from year to year.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.calvert.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Portfolio’s past performance does not necessarily indicate how the Portfolio will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Total Returns
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
 
Quarter
Ended
 
Total
Return
Best Quarter (of periods shown)
12/31/2010
 
17.55
 %
Worst Quarter (of periods shown)
12/31/2008
 
-25.51
 %
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (as of 12/31/15)
Calvert VP SRI Mid Cap Growth Portfolio | Russell Midcap Growth Index (reflects no deduction for fees or expenses)  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees or expenses)
Label rr_AverageAnnualReturnLabel Russell Midcap Growth Index (reflects no deduction for fees or expenses)
1 Year rr_AverageAnnualReturnYear01 (0.20%)
5 Years rr_AverageAnnualReturnYear05 11.54%
10 Years rr_AverageAnnualReturnYear10 8.16%
Calvert VP SRI Mid Cap Growth Portfolio | Lipper VA Mid-Cap Core Funds Average  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Lipper VA Mid-Cap Core Funds Average
1 Year rr_AverageAnnualReturnYear01 (0.30%)
5 Years rr_AverageAnnualReturnYear05 9.93%
10 Years rr_AverageAnnualReturnYear10 7.41%
Calvert VP SRI Mid Cap Growth Portfolio | Single Class  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.77% [1]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.97%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 99
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 309
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 536
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,190
Annual Return 2006 rr_AnnualReturn2006 6.88%
Annual Return 2007 rr_AnnualReturn2007 10.16%
Annual Return 2008 rr_AnnualReturn2008 (37.19%)
Annual Return 2009 rr_AnnualReturn2009 32.02%
Annual Return 2010 rr_AnnualReturn2010 31.47%
Annual Return 2011 rr_AnnualReturn2011 2.33%
Annual Return 2012 rr_AnnualReturn2012 16.75%
Annual Return 2013 rr_AnnualReturn2013 29.90%
Annual Return 2014 rr_AnnualReturn2014 8.09%
Annual Return 2015 rr_AnnualReturn2015 (3.28%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter (of periods shown)
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.55%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter (of periods shown)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (25.51%)
Label rr_AverageAnnualReturnLabel Calvert VP SRI Mid Cap Growth Portfolio
1 Year rr_AverageAnnualReturnYear01 (3.28%)
5 Years rr_AverageAnnualReturnYear05 10.16%
10 Years rr_AverageAnnualReturnYear10 7.61%
CALVERT VARIABLE SERIES INC CLASS F | Calvert VP SRI Balanced Portfolio Series  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading CALVERT VP SRI BALANCED PORTFOLIO Class: F 
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Portfolio seeks to achieve a competitive total return through an actively managed portfolio of stocks, bonds, and money market instruments which offer income and capital growth opportunity.
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE PORTFOLIO
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you invest in shares of the Portfolio.
The table and the following example do not reflect fees and charges imposed under the variable annuity contracts and life insurance policies (each a “Policy”) through which an investment may be made. If those fees and charges were included, costs would be higher. Please consult the prospectus for your Policy for information regarding those fees and charges.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (“turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the “Example”, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 90% of its portfolio’s average value.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 90.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The example assumes that:
•
you invest $10,000 in the Portfolio for the time periods indicated;
•
your investment has a 5% return each year;
•
the Portfolio’s operating expenses remain the same; and
•
any Calvert expense limitation and/or fee waiver is in effect for the period indicated in the fee table above.
Although your actual costs may be higher or lower, under these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading INVESTMENTS, RISKS AND PERFORMANCE Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Portfolio typically invests about 60% of its net assets in stocks and 40% in bonds or other fixed-income investments. Stock investments are primarily common stock in large-cap companies. Fixed-income investments are primarily a wide variety of investment grade debt securities, such as corporate debt securities, mortgage-backed securities (including commercial mortgage-backed securities and collateralized mortgage obligations (“CMOs”)) and other asset-backed securities (“ABS”). The Portfolio invests in debt and mortgage-backed securities issued by government-sponsored enterprises (“GSEs”) such as the Federal National Mortgage Association (“FNMA”) and the Federal Home Loan Mortgage Corporation (“FHLMC”). The Portfolio may invest up to 25% of its net assets in foreign securities and may also invest in unrated debt securities.
An investment grade debt security is rated BBB- or higher by a nationally recognized statistical rating organization (“NRSRO”), or is an unrated debt security determined by the Advisor to be of comparable credit quality.
The Portfolio is “non-diversified,” which means it may hold securities of a smaller number of issuers and invest a greater percentage of its assets in a particular issuer than a “diversified” fund.
The Portfolio invests in a combination of stocks, bonds and money market instruments in an attempt to provide a complete investment portfolio in a single product. The Advisor monitors the Portfolio’s allocation and may rebalance or reallocate the Portfolio’s assets based on its view of economic and market factors and events. The equity portion of the Portfolio is primarily a large cap core U.S. domestic portfolio, although the Portfolio may also invest in foreign stocks and mid-cap stocks. The equity portion of the Portfolio seeks companies that have the potential to outperform the market through exceptional growth and/or valuation improvement. The fixed-income portion of the Portfolio reflects an active trading strategy, seeking total return.
The Portfolio uses a hedging technique that includes the purchase and sale of U.S. Treasury securities and related futures contracts to manage the duration of the Portfolio and hedge interest rate risk.
Incidental to its main investment strategy, the Portfolio may also use futures contracts as a substitute for direct investment in a particular asset class, in order to facilitate the periodic rebalancing of the Portfolio to maintain its target asset allocation, to make tactical asset allocations and to assist in managing cash.
Responsible Investing. In conjunction with Calvert’s financial analysis, Calvert’s comprehensive responsible investment principles guide our investment research processes and decision-making. The principles, which include the Advisor’s proprietary assessment of critical environmental, social and governance (“ESG”) issues, are applied across industries and to specific companies in order to inform our view of risk and opportunity factors that may affect investment performance.

Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
You could lose money on your investment in the Portfolio, or the Portfolio could underperform, because of the risks described below. An investment in the Portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Non-Diversification Risk. Because the Portfolio may hold securities of a smaller number of issuers or invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single security may have greater impact on the Portfolio than on a diversified fund.
Management Risk. Individual investments of the Portfolio may not perform as expected, and the portfolio management practices may not achieve the desired result. There is a risk that the Advisor may allocate assets to an asset class that underperforms other asset classes.
Stock Market Risk. The market prices of stocks held by the Portfolio may fall.
Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company’s financial condition, on overall market and economic conditions, and on investors’ perception of a company’s well-being.
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.
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.
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 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.
Bond Market Risk. The market prices of bonds held by the Portfolio may fall.
Interest Rate Risk. A change in interest rates may adversely affect the value of fixed-income securities. When interest rates rise, the value of fixed-income securities will generally fall. Longer-term securities are subject to greater interest rate risk.
Credit Risk. The credit quality of fixed-income securities may deteriorate, which could lead to default or bankruptcy of the issuer where the issuer becomes unable to pay its obligations when due.
Mortgage-Backed and Asset-Backed Securities Risk. The value of investments in mortgage-backed and asset-backed securities is subject to interest rate risk and credit risk. These securities are also subject to the risk that borrowers will prepay the principal on their loans more quickly than expected (prepayment risk) or more slowly than expected (extension risk), which will affect the yield, average life and price of the securities. In addition, faster-than-expected prepayments may cause the Portfolio to invest the prepaid principal in lower yielding securities and slower than expected prepayments may reduce the potential for the Portfolio to invest in higher yielding securities.
Mortgage-Backed Security Risk (Government-Sponsored Enterprises).  Debt and mortgage-backed securities issued by GSEs such as FNMA and FHLMC are neither insured nor guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. government. Such securities are only supported by the credit of the applicable GSE. The U.S. government has provided financial support to FNMA and FHLMC, but there can be no assurance that it will support these or other GSEs in the future.
Collateralized Mortgage Obligation and Structured Asset-Backed Securities Risk. A CMO is a multiclass bond that is backed by a pool of mortgage loans or mortgage-backed securities. A structured ABS is a multiclass bond that is typically backed by a pool of auto loans, credit card receivables, home equity loans or student loans. A CMO or structured ABS is subject to interest rate risk, credit risk, prepayment risk and extension risk. In addition, if the Portfolio holds a class of a CMO or a structured ABS that is subordinated to other classes backed by the same pool of collateral, the likelihood that the Portfolio will receive payments of principal may be substantially limited.
Below-Investment Grade, High-Yield Debt Securities Risk. Investments in below-investment grade, high-yield debt securities (commonly known as “junk bonds”) can involve a substantial risk of loss. Junk bonds are considered to be speculative with respect to the issuer’s ability to pay interest and principal. These securities, which are rated below investment grade, have a higher risk of issuer default, are subject to greater price volatility than investment grade securities and may be illiquid.
Unrated Security Risk. Unrated securities may be less liquid than rated securities determined to be of comparable quality. The Portfolio’s purchase of unrated securities depends on the Advisor’s analysis of credit risk without the assessment of an NRSRO.
Active Trading Strategy Risk. The fixed-income portion of the Portfolio employs an active style that seeks to position the Portfolio with securities that offer the greatest price appreciation while minimizing risk. This style can result in higher turnover (exceeding 100%) and may translate to higher transaction costs.
Futures Contracts Risk. The value of a futures contract tends to increase and decrease in tandem with the value of the underlying instrument. The price of futures can be highly volatile; using them could lower total return, and the potential loss from futures can exceed the Portfolio’s initial investment in such contracts. Futures contracts may not provide an effective hedge of the underlying securities or indexes because changes in the prices of futures contracts may not track those of the securities or indexes that they are intended to hedge.
Responsible Investing Risk. Investing primarily in responsible investments carries the risk that, under certain market conditions, the Portfolio may underperform funds that do not utilize a responsible investment strategy. The application of responsible investment principles may affect the Portfolio’s exposure to certain sectors or types of investments and may impact the Portfolio’s relative investment performance depending on whether such sectors or investments are in or out of favor in the market. A company’s ESG performance or the Advisor’s assessment of a company’s ESG performance may change over time, which could cause the Portfolio to temporarily hold securities that do not comply with the Portfolio’s responsible investment principles. In evaluating a company, the Advisor is dependent upon information and data that may be incomplete, inaccurate or unavailable, which could cause the Advisor to incorrectly assess a company’s ESG performance. Successful application of the Portfolio’s responsible investment strategy will depend on the Advisor’s skill in properly identifying and analyzing material ESG issues.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Portfolio, or the Portfolio could underperform, because of the risks described below.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk. Because the Portfolio may hold securities of a smaller number of issuers or invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single security may have greater impact on the Portfolio than on a diversified fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table show the Portfolio’s annual returns and its long-term performance, which give some indication of the risks of investing in the Portfolio. The bar chart shows how the performance has varied from year to year. The table compares the Portfolio’s performance over time with that of a benchmark index, a composite index and a performance average of similar mutual funds. The performance reflected in the bar chart and table assumes the reinvestment of dividends and capital gains distributions, if any.
Investors should note that the performance presented in the bar chart and table below for periods prior to the inception date of the Class F shares on October 18, 2013 is that of the Portfolio’s Class I shares. Both classes of shares of the Portfolio will have substantially similar annual returns because all classes of shares of the Portfolio invest in the same pool of investments, although Class F shares’ performance will be lower than the performance of the Class I shares of the Portfolio because Class F shares have higher operating expenses due to the Class F shares’ Rule 12b-1 fees.
The table below shows the Balanced Composite because it is more consistent with the Portfolio’s portfolio construction process and represents a more accurate reflection of the Portfolio’s anticipated risk and return patterns. The Balanced Composite Benchmark is an internally constructed benchmark comprised of a blend of 60% Russell 1000 Index and 40% Barclays U.S. Aggregate Bond Index. Returns of the fixed-income component prior to 11/1/15 reflect the performance of the Barclays U.S. Credit Index.
The Portfolio’s past performance does not necessarily indicate how the Portfolio will perform in the future. For updated performance information, visit www.calvert.com.
The returns shown do not reflect fees and charges imposed under the variable annuity contracts and life insurance policies through which an investment may be made. If those fees and charges were included, they would reduce these returns.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table show the Portfolio’s annual returns and its long-term performance, which give some indication of the risks of investing in the Portfolio. The bar chart shows how the performance has varied from year to year.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.calvert.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Portfolio’s past performance does not necessarily indicate how the Portfolio will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Total Returns
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
 
Quarter Ended
 
Total Return
Best Quarter (of periods shown)
12/31/2014
 
3.77
%
Worst Quarter (of periods shown)
9/30/2015
 
-6.10
%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (as of 12/31/15)
CALVERT VARIABLE SERIES INC CLASS F | Calvert VP SRI Balanced Portfolio Series | Russell 1000 Index  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell 1000 Index (reflects no deduction for fees or expenses)
1 Year rr_AverageAnnualReturnYear01 0.92%
5 Years rr_AverageAnnualReturnYear05 12.44%
10 Years rr_AverageAnnualReturnYear10 7.40%
CALVERT VARIABLE SERIES INC CLASS F | Calvert VP SRI Balanced Portfolio Series | Balanced Composite Benchmark (reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees or expenses)
Label rr_AverageAnnualReturnLabel Balanced Composite Benchmark (reflects no deduction for fees or expenses)
1 Year rr_AverageAnnualReturnYear01 0.75%
5 Years rr_AverageAnnualReturnYear05 9.59%
10 Years rr_AverageAnnualReturnYear10 7.79%
CALVERT VARIABLE SERIES INC CLASS F | Calvert VP SRI Balanced Portfolio Series | Lipper VA Mixed-Asset Target Allocation Growth Funds Average  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Lipper VA Mixed-Asset Target Allocation Growth Funds Average
1 Year rr_AverageAnnualReturnYear01 (1.29%)
5 Years rr_AverageAnnualReturnYear05 7.29%
10 Years rr_AverageAnnualReturnYear10 5.78%
CALVERT VARIABLE SERIES INC CLASS F | Calvert VP SRI Balanced Portfolio Series | Class F  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.53% [2]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.81%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.59%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.49%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.10%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 112
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 454
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 819
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,848
Annual Return 2006 rr_AnnualReturn2006 8.77%
Annual Return 2007 rr_AnnualReturn2007 2.76%
Annual Return 2008 rr_AnnualReturn2008 (31.32%)
Annual Return 2009 rr_AnnualReturn2009 25.29%
Annual Return 2010 rr_AnnualReturn2010 12.10%
Annual Return 2011 rr_AnnualReturn2011 4.56%
Annual Return 2012 rr_AnnualReturn2012 10.51%
Annual Return 2013 rr_AnnualReturn2013 17.97%
Annual Return 2014 rr_AnnualReturn2014 9.18%
Annual Return 2015 rr_AnnualReturn2015 (2.51%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter (of periods shown)
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2014
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.77%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter (of periods shown)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.10%)
Label rr_AverageAnnualReturnLabel Calvert VP SRI Balanced Portfolio – Class F
1 Year rr_AverageAnnualReturnYear01 (2.51%)
5 Years rr_AverageAnnualReturnYear05 7.73%
10 Years rr_AverageAnnualReturnYear10 4.58%
CALVERT VARIABLE SERIES INC CLASS I | Calvert VP SRI Balanced Portfolio Series  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading CALVERT VP SRI BALANCED PORTFOLIO Class: I 
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Portfolio seeks to achieve a competitive total return through an actively managed portfolio of stocks, bonds, and money market instruments which offer income and capital growth opportunity.
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE PORTFOLIO
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you invest in shares of the Portfolio.
The table and the following example do not reflect fees and charges imposed under the variable annuity contracts and life insurance policies (each a “Policy”) through which an investment may be made. If those fees and charges were included, costs would be higher. Please consult the prospectus for your Policy for information regarding those fees and charges.

Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (“turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the “Example”, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 90% of its portfolio’s average value.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 90.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The example assumes that:
•
you invest $10,000 in the Portfolio for the time periods indicated;
•
your investment has a 5% return each year; and
•
the Portfolio’s operating expenses remain the same.
Although your actual costs may be higher or lower, under these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading INVESTMENTS, RISKS AND PERFORMANCE Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Portfolio typically invests about 60% of its net assets in stocks and 40% in bonds or other fixed-income investments. Stock investments are primarily common stock in large-cap companies. Fixed-income investments are primarily a wide variety of investment grade debt securities, such as corporate debt securities, mortgage-backed securities (including commercial mortgage-backed securities and collateralized mortgage obligations (“CMOs”)) and other asset-backed securities (“ABS”). The Portfolio invests in debt and mortgage-backed securities issued by government-sponsored enterprises (“GSEs”) such as the Federal National Mortgage Association (“FNMA”) and the Federal Home Loan Mortgage Corporation (“FHLMC”). The Portfolio may invest up to 25% of its net assets in foreign securities and may also invest in unrated debt securities.
An investment grade debt security is rated BBB- or higher by a nationally recognized statistical rating organization (“NRSRO”), or is an unrated debt security determined by the Advisor to be of comparable credit quality.
The Portfolio is “non-diversified,” which means it may hold securities of a smaller number of issuers and invest a greater percentage of its assets in a particular issuer than a “diversified” fund.
The Portfolio invests in a combination of stocks, bonds and money market instruments in an attempt to provide a complete investment portfolio in a single product. The Advisor monitors the Portfolio’s allocation and may rebalance or reallocate the Portfolio’s assets based on its view of economic and market factors and events. The equity portion of the Portfolio is primarily a large cap core U.S. domestic portfolio, although the Portfolio may also invest in foreign stocks and mid-cap stocks. The equity portion of the Portfolio seeks companies that have the potential to outperform the market through exceptional growth and/or valuation improvement. The fixed-income portion of the Portfolio reflects an active trading strategy, seeking total return.
The Portfolio uses a hedging technique that includes the purchase and sale of U.S. Treasury securities and related futures contracts to manage the duration of the Portfolio and hedge interest rate risk.
Incidental to its main investment strategy, the Portfolio may also use futures contracts as a substitute for direct investment in a particular asset class, in order to facilitate the periodic rebalancing of the Portfolio to maintain its target asset allocation, to make tactical asset allocations and to assist in managing cash.
Responsible Investing. In conjunction with Calvert’s financial analysis, Calvert’s comprehensive responsible investment principles guide our investment research processes and decision-making. The principles, which include the Advisor’s proprietary assessment of critical environmental, social and governance (“ESG”) issues, are applied across industries and to specific companies in order to inform our view of risk and opportunity factors that may affect investment performance.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
You could lose money on your investment in the Portfolio, or the Portfolio could underperform, because of the risks described below. An investment in the Portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Non-Diversification Risk. Because the Portfolio may hold securities of a smaller number of issuers or invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single security may have greater impact on the Portfolio than on a diversified fund.
Management Risk. Individual investments of the Portfolio may not perform as expected, and the portfolio management practices may not achieve the desired result. There is a risk that the Advisor may allocate assets to an asset class that underperforms other asset classes.
Stock Market Risk. The market prices of stocks held by the Portfolio may fall.
Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company’s financial condition, on overall market and economic conditions, and on investors’ perception of a company’s well-being.
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.
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.
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 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.
Bond Market Risk. The market prices of bonds held by the Portfolio may fall.
Interest Rate Risk. A change in interest rates may adversely affect the value of fixed-income securities. When interest rates rise, the value of fixed-income securities will generally fall. Longer-term securities are subject to greater interest rate risk.
Credit Risk. The credit quality of fixed-income securities may deteriorate, which could lead to default or bankruptcy of the issuer where the issuer becomes unable to pay its obligations when due.
Mortgage-Backed and Asset-Backed Securities Risk. The value of investments in mortgage-backed and asset-backed securities is subject to interest rate risk and credit risk. These securities are also subject to the risk that borrowers will prepay the principal on their loans more quickly than expected (prepayment risk) or more slowly than expected (extension risk), which will affect the yield, average life and price of the securities. In addition, faster-than-expected prepayments may cause the Portfolio to invest the prepaid principal in lower yielding securities and slower than expected prepayments may reduce the potential for the Portfolio to invest in higher yielding securities.
Mortgage-Backed Security Risk (Government-Sponsored Enterprises).  Debt and mortgage-backed securities issued by GSEs such as FNMA and FHLMC are neither insured nor guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. government. Such securities are only supported by the credit of the applicable GSE. The U.S. government has provided financial support to FNMA and FHLMC, but there can be no assurance that it will support these or other GSEs in the future.
Collateralized Mortgage Obligation and Structured Asset-Backed Securities Risk. A CMO is a multiclass bond that is backed by a pool of mortgage loans or mortgage-backed securities. A structured ABS is a multiclass bond that is typically backed by a pool of auto loans, credit card receivables, home equity loans or student loans. A CMO or structured ABS is subject to interest rate risk, credit risk, prepayment risk and extension risk. In addition, if the Portfolio holds a class of a CMO or a structured ABS that is subordinated to other classes backed by the same pool of collateral, the likelihood that the Portfolio will receive payments of principal may be substantially limited.
Below-Investment Grade, High-Yield Debt Securities Risk. Investments in below-investment grade, high-yield debt securities (commonly known as “junk bonds”) can involve a substantial risk of loss. Junk bonds are considered to be speculative with respect to the issuer’s ability to pay interest and principal. These securities, which are rated below investment grade, have a higher risk of issuer default, are subject to greater price volatility than investment grade securities and may be illiquid.
Unrated Security Risk. Unrated securities may be less liquid than rated securities determined to be of comparable quality. The Portfolio’s purchase of unrated securities depends on the Advisor’s analysis of credit risk without the assessment of an NRSRO.
Active Trading Strategy Risk. The fixed-income portion of the Portfolio employs an active style that seeks to position the Portfolio with securities that offer the greatest price appreciation while minimizing risk. This style can result in higher turnover (exceeding 100%) and may translate to higher transaction costs.
Futures Contracts Risk. The value of a futures contract tends to increase and decrease in tandem with the value of the underlying instrument. The price of futures can be highly volatile; using them could lower total return, and the potential loss from futures can exceed the Portfolio’s initial investment in such contracts. Futures contracts may not provide an effective hedge of the underlying securities or indexes because changes in the prices of futures contracts may not track those of the securities or indexes that they are intended to hedge.
Responsible Investing Risk. Investing primarily in responsible investments carries the risk that, under certain market conditions, the Portfolio may underperform funds that do not utilize a responsible investment strategy. The application of responsible investment principles may affect the Portfolio’s exposure to certain sectors or types of investments and may impact the Portfolio’s relative investment performance depending on whether such sectors or investments are in or out of favor in the market. A company’s ESG performance or the Advisor’s assessment of a company’s ESG performance may change over time, which could cause the Portfolio to temporarily hold securities that do not comply with the Portfolio’s responsible investment principles. In evaluating a company, the Advisor is dependent upon information and data that may be incomplete, inaccurate or unavailable, which could cause the Advisor to incorrectly assess a company’s ESG performance. Successful application of the Portfolio’s responsible investment strategy will depend on the Advisor’s skill in properly identifying and analyzing material ESG issues.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Portfolio, or the Portfolio could underperform, because of the risks described below.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk. Because the Portfolio may hold securities of a smaller number of issuers or invest a greater percentage of its assets in a particular issuer than a diversified fund, the gains or losses on a single security may have greater impact on the Portfolio than on a diversified fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table show the Portfolio’s annual returns and its long-term performance, which give some indication of the risks of investing in the Portfolio. The bar chart shows how the performance has varied from year to year. The table compares the Portfolio’s performance over time with that of a benchmark index, a composite index and a performance average of similar mutual funds. The performance reflected in the bar chart and table assumes the reinvestment of dividends and capital gains distributions, if any.
The table below shows the Balanced Composite because it is more consistent with the Portfolio’s portfolio construction process and represents a more accurate reflection of the Portfolio’s anticipated risk and return patterns. The Balanced Composite Benchmark is an internally constructed benchmark comprised of a blend of 60% Russell 1000 Index and 40% Barclays U.S. Aggregate Bond Index. Returns of the fixed-income component prior to 11/1/15 reflect the performance of the Barclays U.S. Credit Index.
The Portfolio’s past performance does not necessarily indicate how the Portfolio will perform in the future. For updated performance information, visit www.calvert.com.
The returns shown do not reflect fees and charges imposed under the variable annuity contracts and life insurance policies through which an investment may be made. If those fees and charges were included, they would reduce these return
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table show the Portfolio’s annual returns and its long-term performance, which give some indication of the risks of investing in the Portfolio. The bar chart shows how the performance has varied from year to year.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.calvert.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Portfolio’s past performance does not necessarily indicate how the Portfolio will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Total Returns
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
 
Quarter
Ended
 
Total
Return
Best Quarter (of periods shown)
9/30/2009
 
12.29
 %
Worst Quarter (of periods shown)
12/31/2008
 
-19.63
 %
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (as of 12/31/15)
CALVERT VARIABLE SERIES INC CLASS I | Calvert VP SRI Balanced Portfolio Series | Russell 1000 Index  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell 1000 Index
1 Year rr_AverageAnnualReturnYear01 0.92%
5 Years rr_AverageAnnualReturnYear05 12.44%
10 Years rr_AverageAnnualReturnYear10 7.40%
CALVERT VARIABLE SERIES INC CLASS I | Calvert VP SRI Balanced Portfolio Series | Balanced Composite Benchmark (reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees or expenses)
Label rr_AverageAnnualReturnLabel Balanced Composite Benchmark (reflects no deduction for fees or expenses)
1 Year rr_AverageAnnualReturnYear01 0.75%
5 Years rr_AverageAnnualReturnYear05 9.59%
10 Years rr_AverageAnnualReturnYear10 7.79%
CALVERT VARIABLE SERIES INC CLASS I | Calvert VP SRI Balanced Portfolio Series | Lipper VA Mixed-Asset Target Allocation Growth Funds Average  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Lipper VA Mixed-Asset Target Allocation Growth Funds Average
1 Year rr_AverageAnnualReturnYear01 (1.29%)
5 Years rr_AverageAnnualReturnYear05 7.29%
10 Years rr_AverageAnnualReturnYear10 5.78%
CALVERT VARIABLE SERIES INC CLASS I | Calvert VP SRI Balanced Portfolio Series | Class I  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage) rr_MaximumDeferredSalesChargeOverOther none
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.53% [4]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.17%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.70%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 72
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 224
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 390
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 871
Annual Return 2006 rr_AnnualReturn2006 8.77%
Annual Return 2007 rr_AnnualReturn2007 2.76%
Annual Return 2008 rr_AnnualReturn2008 (31.32%)
Annual Return 2009 rr_AnnualReturn2009 25.29%
Annual Return 2010 rr_AnnualReturn2010 12.10%
Annual Return 2011 rr_AnnualReturn2011 4.56%
Annual Return 2012 rr_AnnualReturn2012 10.51%
Annual Return 2013 rr_AnnualReturn2013 18.00%
Annual Return 2014 rr_AnnualReturn2014 9.60%
Annual Return 2015 rr_AnnualReturn2015 (2.19%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter (of periods shown)
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 12.29%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter (of periods shown)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.63%)
Label rr_AverageAnnualReturnLabel Calvert VP SRI Balanced Portfolio - Class I
1 Year rr_AverageAnnualReturnYear01 (2.19%)
5 Years rr_AverageAnnualReturnYear05 7.89%
10 Years rr_AverageAnnualReturnYear10 4.65%
[1] Management fees are restated to reflect current contractual fees rather than the fees paid during the previous fiscal year.
[2] Management fees are restated to reflect current contractual fees rather than the fees paid during the previous fiscal year.
[3] The investment advisor has agreed to contractually limit direct net annual fund operating expenses to 1.10% through April 30, 2017. Only the Board of Directors of the Portfolio may terminate the Portfolio’s expense limitation before the contractual period expires, upon 60 days' prior notice to shareholders.
[4] Management fees are restated to reflect current contractual fees rather than the fees paid during the previous fiscal year.