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Virtus SGA Global Growth Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Virtus SGA Global Growth Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The fund has an investment objective of long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
The tables below illustrate all fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts in Class A Shares if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Funds. More information on these and other discounts is available: (i) from your financial advisor or other financial intermediary; (ii) under “Sales Charges” on page 87 of the fund’s prospectus; (iii) with respect to purchase of shares through specific intermediaries, in Appendix A to the fund’s prospectus, entitled “Intermediary Sales Charge Discounts and Waivers;” and (iv) under “Alternative Purchase Arrangements” on page 99 of the fund’s statement of additional information (“SAI”).
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 percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination May 31, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” 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 example, affect the fund’s performance. During the most recent fiscal period, the fund’s portfolio turnover rate was 13% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 13.00%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Estimated for current fiscal year, as annualized.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets appearing in the Financial Highlights tables, which tables reflect only the operating expenses of the fund and do not include acquired fund fees and expenses.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes an investment of  $10,000 in the fund for the time periods indicated. It shows your costs if you sold your shares at the end of the period or continued to hold them. The example also assumes that your investment has a 5% return each year, that the fund’s operating expenses remain the same and that the expense reimbursement arrangement remains in place for the contractual period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Investments, Risks and Performance
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Principal Investment Strategies

The fund will invest in securities of issuers located throughout the world, including the United States (“U.S.”). Under normal circumstances, the fund will invest primarily in equity securities, with at least 40% of the fund’s net assets in issuers organized, headquartered or doing a substantial amount of business outside the U.S. As of the date of this prospectus, the fund’s subadviser, Sustainable Growth Advisers, LP (“SGA”), considers an issuer that has at least 50% of its assets or derives at least 50% of its revenue from business outside the U.S. as doing a substantial amount of business outside the U.S. The fund may invest up to 25% of its net assets in the securities of companies located in countries included in the MSCI Emerging Markets Index.

SGA uses an investment process to identify companies that it believes have a high degree of predictability, strong profitability and above average earnings and cash flow growth. SGA selects investments for the fund’s portfolio that it believes have superior long-term earnings prospects and attractive valuation. The fund’s equity investments may include common stocks, preferred stocks, securities convertible into or exchangeable for common stocks, and depositary receipts. The fund may invest in companies of all market capitalizations, but will generally invest in large and medium capitalization companies and convertible securities of any duration. As of the date of this prospectus, the fund’s subadviser considers large and medium sized companies to be those with market capitalizations over $25 billion and from $5 billion to $25 billion, respectively, at the time of purchase. The fund will allocate its assets among various regions and countries (but no fewer than three non-U.S. countries). From time to time, the fund may have a significant portion of its assets invested in the securities of companies in only a few countries and one or a few regions. Although the fund seeks investments across a number of sectors, from time to time, the fund may have significant positions in particular sectors.

SGA may trade foreign currency forward contracts or currency futures in an attempt to reduce the fund’s risk exposure to adverse fluctuations in currency exchange rates.

SGA will sell a portfolio holding when it believes the security’s fundamentals deteriorate, its valuation is no longer attractive, or a better investment opportunity arises.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The fund may not achieve its objective(s), and it is not intended to be a complete investment program. The value of the fund’s investments that supports your share value may decrease. If between the time you purchase shares and the time you sell shares the value of the fund’s investments decreases, you will lose money. Investment values can decrease for a number of reasons. Conditions affecting the overall economy, specific industries or companies in which the fund invests can be worse than expected, and investments may fail to perform as the subadviser expects. As a result, the value of your shares may decrease. Purchase and redemption activities by fund shareholders may impact the management of the fund and its ability to achieve its investment objective(s). The principal risks of investing in the fund are identified below.

Equity Securities Risk.  The value of the stocks held by the fund may be negatively affected by the financial market, industries in which the fund invests, or issuer-specific events. Focus on a particular style or in small or medium-sized companies may enhance that risk.

Foreign Investing Risk.  Investing in foreign securities subjects the fund to additional risks such as increased volatility; currency fluctuations; less liquidity; and political, regulatory, economic, and market risk.

Emerging Market Risk.  Emerging markets securities may be more volatile, or more greatly affected by negative conditions, than those of their counterparts in more established foreign markets.

Sector Focused Investing Risk.  Events negatively affecting a particular market sector in which the fund focuses its investments may cause the value of the fund’s shares to decrease, perhaps significantly.

Geographic Concentration Risk.  A fund that focuses its investments in a particular geographic location will be sensitive to financial, economic, political and other events negatively affecting that location and may cause the value of the fund to decrease, perhaps significantly.

Convertible Securities Risk.  The value of a convertible security may decline as interest rates rise and/or vary with fluctuations in the market value of the underlying securities. The security will be called for redemption at a time and/or price unfavorable to the fund.

Counterparty Risk.  There is risk that a party upon whom the fund relies to complete a transaction will default.

Credit Risk.   If the issuer of a debt instrument fails to pay interest or principal in a timely manner, or negative perceptions of the issuer’s ability to make such payments, the price of the security may decline.

Currency Rate Risk.  Fluctuations in the exchange rates between the U.S. dollar and foreign currencies may negatively affect the value of the fund’s shares.

Depositary Receipts Risk.  Investments in foreign companies through depositary receipts may expose the fund to the same risks as direct investments in securities of foreign issuers.

Derivatives Risk.  Derivatives may include, among other things, futures, options, forwards and swap agreements and may be used in order to hedge portfolio risks, create leverage or attempt to increase returns. Investments in derivatives may result in increased volatility and the fund may incur a loss greater than its principal investment.

Foreign Currency Transactions Risk.  The fund’s transactions with respect to foreign currency may not be successful or have the effect of limiting gains from favorable market movements.

Growth Stocks Risk.  The fund’s investments in growth stocks may be more volatile than investments in other types of stocks, or may perform differently from the market as a whole and from other types of stocks.

Large Market Capitalization Companies Risk.  The value of investments in larger companies may not rise as much as smaller companies, or larger companies may be unable to respond quickly to competitive challenges, such as changes in technology and consumer tastes.

Market Volatility Risk.  The value of the securities in the fund may go up or down in response to the prospects of individual companies and/or general economic conditions. Price changes may be short- or long-term.

Medium Market Capitalization Companies Risk.  The fund’s investments in medium market capitalization companies may increase the volatility and risk of loss to the fund, as compared with investments in larger, more established companies.

Preferred Stocks Risk.  Prreferred stocks may decline in price, fail to pay dividends when expected, or be illiquid.

Redemption Risk.  One or more large shareholders or groups of shareholders may redeem their holdings in the fund, resulting in an adverse impact on remaining shareholders in the fund by causing the fund to take actions it would not otherwise have taken.
Risk Lose Money [Text] rr_RiskLoseMoney If between the time you purchase shares and the time you sell shares the value of the fund’s investments decreases, you will lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The fund is the successor of American Beacon SGA Global Growth Fund, a series of American Beacon Funds (“Predecessor Fund”), resulting from a reorganization of the Predecessor Fund with and into the fund, which occurred on May 3, 2019. The fund has adopted the past performance of the Predecessor Fund as its own. The performance shown below represents the performance of the Predecessor Fund directly since October 4, 2013, and the returns of an earlier predecessor from December 31, 2011 to October 4, 2013 that was adopted by the Predecessor Fund. The Predecessor Fund and the fund have identical investment objectives and strategies.

The bar chart and table below provide some indication of the potential risks of investing in the fund. The fund’s past performance, before and after taxes, is not necessarily an indication of how the fund will perform in the future.

The bar chart shows changes in the Predecessor Fund’s performance from year to year over the life of the fund. The table shows how the Predecessor Fund’s average annual returns compare to those of two broad-based securities market indexes. Updated performance information is available at virtus.com or by calling 800-243-1574.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide some indication of the potential risks of investing in the fund.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The MSCI All-Country World Index (net) is a free float-adjusted market capitalization-weighted index that measures equity performance of developed and emerging markets. The MSCI All Country World Growth Index (net) is designed to measure the equity market performance of companies with higher growth values in developed and emerging markets. The indexes are calculated on a total return basis with net dividends reinvested. The indexes are unmanaged, and are not available for direct investment.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800-243-1574
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress virtus.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The fund’s past performance, before and after taxes, is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar year total returns for Class I Shares (includes returns of a predecessor fund)
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock
Returns do not reflect sales charges and would be lower if they did.

Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges and would be lower if they did.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
​ ​
Best Quarter:
 ​ ​
Q1/2019:
 ​ ​
17.32%
 ​ ​
Worst Quarter:
 ​ ​
Q4/2018:
 ​ ​
-11.43%
 ​ ​
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.32%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.43%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended 12/31/19)
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads Returns reflect deduction of maximum sales charges and full redemption at end of periods shown.
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate 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.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold fund shares in tax-deferred accounts or to shares held by non-taxable entities.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Class I Shares; after-tax returns for other classes will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
Returns reflect deduction of maximum sales charges and full redemption at end of periods shown.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
The MSCI All-Country World Index (net) is a free float-adjusted market capitalization-weighted index that measures equity performance of developed and emerging markets. The MSCI All Country World Growth Index (net) is designed to measure the equity market performance of companies with higher growth values in developed and emerging markets. The indexes are calculated on a total return basis with net dividends reinvested. The indexes are unmanaged, and are not available for direct investment.

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. After-tax returns are shown only for Class I Shares; after-tax returns for other classes will vary. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold fund shares in tax-deferred accounts or to shares held by non-taxable entities.
Virtus SGA Global Growth Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.40% [1]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.46% [2]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.07%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.39% [2],[3]
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts in Class A Shares if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 708
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 997
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,314
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,209
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 708
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 997
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,314
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,209
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 24.56%
5 Years rr_AverageAnnualReturnYear05 12.42%
Since Inception rr_AverageAnnualReturnSinceInception 11.03%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class A | MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 26.60%
5 Years rr_AverageAnnualReturnYear05 8.41%
Since Inception rr_AverageAnnualReturnSinceInception 8.52%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class A | MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 32.72%
5 Years rr_AverageAnnualReturnYear05 10.70%
Since Inception rr_AverageAnnualReturnSinceInception 10.61%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00% [4]
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.36% [1]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.17% [2]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.03%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 2.14% [2],[3]
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock The deferred sales charge is imposed on Class C Shares redeemed during the first year only.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 317
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 673
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,159
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,498
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 217
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 673
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,159
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,498
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 31.15%
5 Years rr_AverageAnnualReturnYear05 12.93%
Since Inception rr_AverageAnnualReturnSinceInception 11.25%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class C | MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 26.60%
5 Years rr_AverageAnnualReturnYear05 8.41%
Since Inception rr_AverageAnnualReturnSinceInception 8.52%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class C | MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 32.72%
5 Years rr_AverageAnnualReturnYear05 10.70%
Since Inception rr_AverageAnnualReturnSinceInception 10.61%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class I  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.44% [1]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.25% [2]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.11%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.14% [2],[3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 116
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 374
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 665
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,491
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 116
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 374
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 665
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,491
Annual Return 2014 rr_AnnualReturn2014 1.05%
Annual Return 2015 rr_AnnualReturn2015 7.71%
Annual Return 2016 rr_AnnualReturn2016 4.07%
Annual Return 2017 rr_AnnualReturn2017 32.77%
Annual Return 2018 rr_AnnualReturn2018 (3.13%)
Annual Return 2019 rr_AnnualReturn2019 32.44%
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 32.44%
5 Years rr_AverageAnnualReturnYear05 13.81%
Since Inception rr_AverageAnnualReturnSinceInception 12.14%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class I | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 32.43%
5 Years rr_AverageAnnualReturnYear05 13.02%
Since Inception rr_AverageAnnualReturnSinceInception 11.31%
Virtus SGA Global Growth Fund | Class I | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 19.21%
5 Years rr_AverageAnnualReturnYear05 10.83%
Since Inception rr_AverageAnnualReturnSinceInception 9.54%
Virtus SGA Global Growth Fund | Class I | MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 26.60%
5 Years rr_AverageAnnualReturnYear05 8.41%
Since Inception rr_AverageAnnualReturnSinceInception 8.52%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class I | MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 32.72%
5 Years rr_AverageAnnualReturnYear05 10.70%
Since Inception rr_AverageAnnualReturnSinceInception 10.61%
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 04, 2013
Virtus SGA Global Growth Fund | Class R6  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.33% [1]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.14% [2]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.23%) [3]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.91% [2],[3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 93
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 315
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 582
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,344
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 93
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 315
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 582
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,344
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 32.80%
5 Years rr_AverageAnnualReturnYear05 14.24%
Since Inception rr_AverageAnnualReturnSinceInception 12.21%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 31, 2010
Virtus SGA Global Growth Fund | Class R6 | MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 26.60%
5 Years rr_AverageAnnualReturnYear05 8.41%
Since Inception rr_AverageAnnualReturnSinceInception 8.36%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 31, 2010
Virtus SGA Global Growth Fund | Class R6 | MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Growth Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 32.72%
5 Years rr_AverageAnnualReturnYear05 10.70%
Since Inception rr_AverageAnnualReturnSinceInception 9.87%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 31, 2010
[1] Estimated for current fiscal year, as annualized.
[2] The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets appearing in the Financial Highlights tables, which tables reflect only the operating expenses of the fund and do not include acquired fund fees and expenses.
[3] The fund's investment adviser has contractually agreed to limit the fund's total operating expenses (excluding certain expenses, such as front-end or contingent deferred sales charges, taxes, leverage and borrowing expenses (such as commitment, amendment and renewal expenses on credit or redemption facilities), interest, brokerage commissions, expenses incurred in connection with any merger or reorganization, unusual or infrequently occurring expenses (such as litigation), acquired fund fees and expenses, and dividend expenses, if any) so that such expenses do not exceed 1.38% for Class A Shares, 2.13% for Class C Shares, 1.13% for Class I Shares and 0.90% for Class R6 Shares through May 31, 2021. Following the contractual period, the adviser may discontinue these expense reimbursement arrangements at any time. Under certain conditions, the adviser may recapture operating expenses reimbursed and/or fees waived under these arrangements for a period of three years following the date such waiver or reimbursement occurred, provided that the recapture does not cause the fund to exceed its expense limit in effect at the time of the waiver or reimbursement, or at the time of recapture.
[4] The deferred sales charge is imposed on Class C Shares redeemed during the first year only.