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Virtus Duff & Phelps Global Infrastructure Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Virtus Duff & Phelps Global Infrastructure Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The fund has investment objectives of both capital appreciation and current income.
Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

The tables below illustrate the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. 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 professional or other financial intermediary; (ii) under “Sales Charges” on page 122 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 112 of the fund’s 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)
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 year, the fund’s portfolio turnover rate was 26% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 26.00%
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 [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods 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 agreement remains in place for the contractual period. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The fund invests globally in infrastructure companies involved in the energy, utility, transportation, and communications industries. Infrastructure companies are believed by the subadviser to exhibit attractive risk/return characteristics, offer moderate-to-high income and moderate growth, and be defensive in nature.

Under normal market conditions, the fund invests at least 80% of its assets in dividend paying equity securities of infrastructure companies that are located in three or more countries, one of which will be the United States. Under normal market conditions, the fund will invest at least 25% of its assets in securities of U.S. issuers. Although the fund concentrates its investments in infrastructure companies, it may invest up to 20% of its assets in securities of issuers that are not infrastructure companies, including stocks, real estate investment trusts (“REITS”) and similar REIT-like entities, debt obligations, money market securities and money market mutual funds, as well as certain derivative instruments. To the extent the fund purchases non-infrastructure stocks, they may be of issuers of any capitalization. When investing in debt obligations, the fund will invest primarily in investment grade debt obligations, although it may invest in high-yield, high-risk fixed income securities (junk bonds).
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the fund invests at least 80% of its assets in dividend paying equity securities of infrastructure companies that are located in three or more countries, one of which will be the United States.
Risk [Heading] rr_RiskHeading Principal Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

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 fund’s performance from year to year over a 10-year period. The table shows how the fund’s average annual returns compare to those of a broad-based securities market index, and a style-specific index and composite benchmark that reflect the market sectors in which the fund invests. 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 Index (net) is calculated on a total return basis with net dividends reinvested. The index is unmanaged and 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 
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Returns do not reflect sales charges applicable to other share classes and would be lower if they did.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
      

Best Quarter:

2019, Q1:

16.31%

Worst Quarter:

2020, Q1:

-21.89%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads Returns reflect deduction of maximum sales charges and full redemption at end of periods shown.
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged Beginning October 1, 2016, the Global Infrastructure Linked Benchmark consists of the FTSE Developed Core Infrastructure 50/50 Index. For the period September 1, 2008 through September 30, 2016, performance of the Global Infrastructure Linked Benchmark consists of the MSCI World Infrastructure Sector Capped Index. Prior to September 1, 2008, performance of the Global Infrastructure Linked Benchmark represents an allocation consisting of 65% MSCI USA/Utilities Index, 20% MSCI World Telecom Services Index, and 15% MSCI World ex USA/Utilities Index.
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. 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. In certain cases, the Return After Taxes on Distributions and Sale of Fund Shares for a period may be higher than other return figures for the same period. This will occur when a capital loss is realized upon the sale of fund shares and provides an assumed tax benefit that increases the return.
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 Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In certain cases, the Return After Taxes on Distributions and Sale of Fund Shares for a period may be higher than other return figures for the same period. This will occur when a capital loss is realized upon the sale of fund shares and provides an assumed tax benefit that increases the return.
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 Index (net) is calculated on a total return basis with net dividends reinvested. The index is unmanaged and not available for direct investment.

The FTSE Developed Core Infrastructure 50/50 Index (net) is a free float-adjusted market capitalization weighted index that gives participants an industry-defined interpretation of developed market infrastructure companies and adjusts the exposure to certain infrastructure subsectors. The constituent weights are 50% Utilities, 30% Transportation (including capping of 7.5% for railroads/railways), and a 20% mix of other sectors including pipelines, satellites, and telecommunication towers. The FTSE Developed Core Infrastructure 50/50 Index (net) is calculated on a total return basis with net dividends reinvested.

Beginning October 1, 2016, the Global Infrastructure Linked Benchmark consists of the FTSE Developed Core Infrastructure 50/50 Index. For the period September 1, 2008 through September 30, 2016, performance of the Global Infrastructure Linked Benchmark consists of the MSCI World Infrastructure Sector Capped Index. Prior to September 1, 2008, performance of the Global Infrastructure Linked Benchmark represents an allocation consisting of 65% MSCI USA/Utilities Index, 20% MSCI World Telecom Services Index, and 15% MSCI World ex USA/Utilities Index. The indexes are calculated on a total return basis.The indexes are unmanaged and 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. In certain cases, the Return After Taxes on Distributions and Sale of Fund Shares for a period may be higher than other return figures for the same period. This will occur when a capital loss is realized upon the sale of fund shares and provides an assumed tax benefit that increases the return.
Virtus Duff & Phelps Global Infrastructure Fund | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock 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.
Virtus Duff & Phelps Global Infrastructure Fund | Equity Securities Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> 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.
Virtus Duff & Phelps Global Infrastructure Fund | Industry/Sector Concentration Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Industry/Sector Concentration Risk: Events negatively affecting infrastructure companies may cause the value of the fund’s shares to decrease, perhaps significantly. Since the fund concentrates its assets in infrastructure companies, the fund is more vulnerable to conditions that negatively affect infrastructure companies as compared to a fund that does not concentrate holdings in such companies.
Virtus Duff & Phelps Global Infrastructure Fund | Foreign Investing Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Foreign Investing Risk: Investing in foreign securities subjects the fund to additional risks such as increased volatility; currency fluctuations; less liquidity; less publicly available information about the foreign investment; and political, regulatory, economic, and market risk.
Virtus Duff & Phelps Global Infrastructure Fund | Income Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Income Risk: Income received from the fund may vary widely over the short- and long-term and/or be less than anticipated if the proceeds from maturing securities in the fund are reinvested in lower-yielding securities.
Virtus Duff & Phelps Global Infrastructure Fund | Market Volatility Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> 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. Local, regional or global events such as war or military conflict (e.g., Russia’s invasion of Ukraine), acts of terrorism, the spread of infectious illness or other public health issue, recessions, or other events could have a significant impact on the fund and its investments, including hampering the ability of the fund’s portfolio manager(s) to invest the fund’s assets as intended.
Virtus Duff & Phelps Global Infrastructure Fund | Credit Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Credit Risk: If the issuer of a debt instrument fails to pay interest or principal in a timely manner, or negative perceptions exist in the market of the issuer’s ability to make such payments, the price of the security may decline.
Virtus Duff & Phelps Global Infrastructure Fund | Derivatives Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Derivatives Risk: Derivatives and other similar instruments (collectively referred to in this section as “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.
Virtus Duff & Phelps Global Infrastructure Fund | Real Estate Investment Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Real Estate Investment Risk: The fund may be negatively affected by changes in real estate values or economic conditions, credit risk and interest rate fluctuations, changes in the value of the underlying real estate and defaults by lessees and/or borrowers.
Virtus Duff & Phelps Global Infrastructure Fund | Currency Rate Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> 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.
Virtus Duff & Phelps Global Infrastructure Fund | Equity Real Estate Investment Trust (REIT) Securities Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Equity Real Estate Investment Trust (REIT) Securities Risk: The fund’s value may be negatively affected by factors specific to the real estate market such as interest rates, leverage, property, and management. The fund’s value may also be negatively affected by factors specific to investing through a pooled vehicle, such as poor management, concentration risk, or other risks typically associated with investing in small or medium market capitalization companies.
Virtus Duff & Phelps Global Infrastructure Fund | Geographic Investment Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Geographic Investment Risk: To the extent the fund invests a significant portion of its assets in the securities of companies of a single country or region, it is more likely to be impacted by events or conditions affecting that country or region.
Virtus Duff & Phelps Global Infrastructure Fund | Geopolitical Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Geopolitical Risk: Some countries and regions in which the fund invests have experienced security concerns, war or threats of war and aggression, terrorism, economic uncertainty, natural and environmental disasters and/or systemic market dislocations that have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S.and world economies and markets generally, each of which may negatively impact the fund’s investments.
Virtus Duff & Phelps Global Infrastructure Fund | High-Yield/High-Risk Fixed Income Securities (Junk Bonds) Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> High-Yield/High-Risk Fixed Income Securities (Junk Bonds) Risk: There is a greater risk of issuer default, less liquidity, and increased price volatility related to high-yield/high-risk securities than investment grade securities.
Virtus Duff & Phelps Global Infrastructure Fund | Infrastructure-Related Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Infrastructure-Related Risk: A fund that focuses its investments in infrastructure-related companies will be more sensitive to conditions affecting their business or operations such as local economic and political conditions, regulatory changes, and environmental issues. Such a focus may cause a decrease in the fund’s value, perhaps significantly.
Virtus Duff & Phelps Global Infrastructure Fund | Interest Rate Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> Interest Rate Risk: The values of debt instruments may rise or fall in response to changes in interest rates, and this risk may be enhanced for securities with longer maturities.
Virtus Duff & Phelps Global Infrastructure Fund | Redemption Risk  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock

> 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.
Virtus Duff & Phelps Global Infrastructure Fund | MSCI All Country World Index (net)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (net) (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel MSCI All Country World Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 22.20%
5 Years rr_AverageAnnualReturnYear05 11.72%
10 Years rr_AverageAnnualReturnYear10 7.92%
Since Inception rr_AverageAnnualReturnSinceInception 7.01%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 30, 2018
Virtus Duff & Phelps Global Infrastructure Fund | FTSE Developed Core Infrastructure 50/50 Index (net)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (net) (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel FTSE Developed Core Infrastructure 50/50 Index (net) (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 2.23%
5 Years rr_AverageAnnualReturnYear05 5.93%
10 Years rr_AverageAnnualReturnYear10 5.96%
Since Inception rr_AverageAnnualReturnSinceInception 4.31%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 30, 2018
Virtus Duff & Phelps Global Infrastructure Fund | Virtus Global Infrastructure Linked Benchmark  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Label rr_AverageAnnualReturnLabel Virtus Global Infrastructure Linked Benchmark (reflects no deduction for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 2.23%
5 Years rr_AverageAnnualReturnYear05 5.93%
10 Years rr_AverageAnnualReturnYear10 4.90%
Since Inception rr_AverageAnnualReturnSinceInception 4.31%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 30, 2018
Virtus Duff & Phelps Global Infrastructure Fund | Class A Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PGUAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.65%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.40%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.30%
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.30% [1]
1 Year rr_ExpenseExampleYear01 $ 675
3 Years rr_ExpenseExampleYear03 939
5 Years rr_ExpenseExampleYear05 1,224
10 Years rr_ExpenseExampleYear10 2,032
1 Year rr_ExpenseExampleNoRedemptionYear01 675
3 Years rr_ExpenseExampleNoRedemptionYear03 939
5 Years rr_ExpenseExampleNoRedemptionYear05 1,224
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,032
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (4.61%)
5 Years rr_AverageAnnualReturnYear05 4.94%
10 Years rr_AverageAnnualReturnYear10 4.38%
Virtus Duff & Phelps Global Infrastructure Fund | Class C Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PGUCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [2]
Management Fees rr_ManagementFeesOverAssets 0.65%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.43%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.08%
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 2.08% [1]
1 Year rr_ExpenseExampleYear01 $ 311
3 Years rr_ExpenseExampleYear03 652
5 Years rr_ExpenseExampleYear05 1,119
10 Years rr_ExpenseExampleYear10 2,410
1 Year rr_ExpenseExampleNoRedemptionYear01 211
3 Years rr_ExpenseExampleNoRedemptionYear03 652
5 Years rr_ExpenseExampleNoRedemptionYear05 1,119
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,410
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 0.15%
5 Years rr_AverageAnnualReturnYear05 5.32%
10 Years rr_AverageAnnualReturnYear10 4.18%
Virtus Duff & Phelps Global Infrastructure Fund | Class I Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PGIUX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.65%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.40%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.05%
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.05% [1]
1 Year rr_ExpenseExampleYear01 $ 107
3 Years rr_ExpenseExampleYear03 334
5 Years rr_ExpenseExampleYear05 579
10 Years rr_ExpenseExampleYear10 1,283
1 Year rr_ExpenseExampleNoRedemptionYear01 107
3 Years rr_ExpenseExampleNoRedemptionYear03 334
5 Years rr_ExpenseExampleNoRedemptionYear05 579
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,283
Annual Return 2014 rr_AnnualReturn2014 9.89%
Annual Return 2015 rr_AnnualReturn2015 (10.04%)
Annual Return 2016 rr_AnnualReturn2016 11.66%
Annual Return 2017 rr_AnnualReturn2017 18.11%
Annual Return 2018 rr_AnnualReturn2018 (6.29%)
Annual Return 2019 rr_AnnualReturn2019 28.20%
Annual Return 2020 rr_AnnualReturn2020 (0.32%)
Annual Return 2021 rr_AnnualReturn2021 13.93%
Annual Return 2022 rr_AnnualReturn2022 (7.53%)
Annual Return 2023 rr_AnnualReturn2023 1.23%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn none
Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.31%
Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.89%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 1.23%
5 Years rr_AverageAnnualReturnYear05 6.39%
10 Years rr_AverageAnnualReturnYear10 5.23%
Virtus Duff & Phelps Global Infrastructure Fund | Class I Shares | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 0.59%
5 Years rr_AverageAnnualReturnYear05 5.02%
10 Years rr_AverageAnnualReturnYear10 3.82%
Virtus Duff & Phelps Global Infrastructure Fund | Class I Shares | After Taxes on Distributions and Sales  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 1.17%
5 Years rr_AverageAnnualReturnYear05 4.97%
10 Years rr_AverageAnnualReturnYear10 3.97%
Virtus Duff & Phelps Global Infrastructure Fund | Class R6 Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol VGIRX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.65%
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.29%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.94%
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 0.85% [1]
1 Year rr_ExpenseExampleYear01 $ 87
3 Years rr_ExpenseExampleYear03 291
5 Years rr_ExpenseExampleYear05 511
10 Years rr_ExpenseExampleYear10 1,146
1 Year rr_ExpenseExampleNoRedemptionYear01 87
3 Years rr_ExpenseExampleNoRedemptionYear03 291
5 Years rr_ExpenseExampleNoRedemptionYear05 511
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,146
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 1.42%
5 Years rr_AverageAnnualReturnYear05 6.57%
Since Inception rr_AverageAnnualReturnSinceInception 4.48%
Inception Date rr_AverageAnnualReturnInceptionDate Jan. 30, 2018
[1]

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 0.85% for Class R6 Shares through January 31, 2025. Prior to January 31, 2025, only the fund’s Board may modify or terminate the expense limitation agreement. 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, and any in effect at the time of recapture, after repayment is taken into account.
[2]

The deferred sales charge is imposed on Class C Shares redeemed during the first year only.