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Virtus Duff & Phelps Real Asset Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Virtus Duff & Phelps Real Asset 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 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 129 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 109 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 17% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 17.00%
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 seeks to achieve its objective by investing its assets in a mix of underlying affiliated and unaffiliated mutual funds and exchange-traded funds (“ETFs”) (collectively, “underlying funds”) representing a broad universe of real assets. The fund’s subadviser expects that over the long term, a multi-strategy real asset portfolio will mitigate the impact of inflation on the fund’s assets. Real assets are securities whose underlying value is tied to a tangible asset or are linked or correlated to the rate of inflation. Under normal circumstances, the fund will invest at least 80% of its net assets in underlying funds which substantially invest directly and indirectly in real assets. Real assets are broadly defined by the fund and include: global real estate (including real estate investment trusts (“REITs”) and real estate operating companies); natural resources; commodities; global infrastructure (sectors such as utilities, telecommunications and industrials); energy midstream Master Limited Partnerships (“MLPs”), General Partners (“GPs”) and C-corporations that own midstream oil and natural gas assets; floating rate instruments (including loans) and global inflation-linked debt securities. Among the underlying funds in which the fund invests are funds that invest principally in equity securities of issuers of any capitalization, including those of foreign issuers, including emerging markets issuers, and funds that invest principally in debt instruments of any credit quality and maturity designation. Under normal circumstances, the Fund will generally invest in affiliated mutual funds where available to represent the desired asset classes, and unaffiliated mutual funds and/or ETFs to represent the desired asset classes for which affiliated mutual funds are unavailable or deemed not to be appropriate for the Fund. The affiliated mutual funds in which the fund may invest include funds subadvised by the fund’s subadviser, Duff & Phelps Investment Management Co. The Fund’s policy of investing at least 80% of its assets in underlying funds which substantially invest in real assets may be changed only upon 60 days’ written notice to shareholders. The fund is non-diversified under federal securities laws.
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.

> Industry/Sector Concentration Risk. A fund that focuses its investments in a particular industry or sector will be more sensitive to conditions that affect that industry or sector than a non-concentrated fund. Such a focus may cause a decrease in the fund’s value, perhaps significantly.

> 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.

 

> 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.

> Natural Resources Risk. Investments in natural resources industries may be significantly affected by events relating to international political and economic developments, energy conservation, the success of exploration projects, commodity prices, taxes and other governmental regulations.

> 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.

> 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.

> 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.

> Allocation Risk. If the fund’s exposure to equities and fixed income securities, or to other asset classes, deviates from the intended allocation, or if the fund’s allocation is not optimal for market conditions at a given time, the fund’s performance may suffer.

> 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.

> Bank Loan Risk. In addition to the risks typically associated with high-yield fixed income securities, bank loans may be unsecured or not fully collateralized, may be subject to restrictions on resale, may be less liquid and may trade infrequently on the secondary market. Bank loans settle on a delayed basis; thus, sale proceeds may not be available to meet redemptions for a substantial period of time after the sale of the loan.

> Inflation-Linked Investments Risk. Inflation-linked securities may react differently from other fixed income securities to changes in interest rates and that interest and/or principal payments on an inflation-protected security may be irregular. While inflation-protected securities are expected to be protected from long-term inflationary trends, short-term increases in inflation may lead to a decline in their value. In addition, positive adjustments to principal in inflation-protected securities generally can be expected to result in taxable income to the Underlying Fund at the time of such adjustments, even though the principal amount is not paid until maturity.

> Master Limited Partnership (MLP) Risk. Investments in MLPs may be negatively impacted by tax law changes, changes in interest rates, the failure of the MLP’s parent or sponsor to make payments as expected, regulatory developments or other factors affecting the MLP’s underlying assets, which are typically in the natural resources and energy sectors.

> Exchange-Traded Funds (ETFs) Risk. The value of an ETF may be more volatile than the underlying portfolio of securities the ETF is designed to track. The costs to the fund of owning shares of an ETF may exceed the cost of investing directly in the underlying securities.

> Fund of Funds Risk. Because the fund can invest in other funds, it bears its proportionate share of the operating expenses and management fees of, and may be adversely affected by, the underlying fund(s). The expenses associated with the fund’s investment in other funds will cost shareholders more than direct investments would have cost.

> Affiliated Fund Risk. The fund’s adviser may select and substitute affiliated and/or unaffiliated mutual funds which may create a conflict of interest.

> 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.

> 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.

The principal risks attributable to the Underlying Funds in which the fund invests are identified below:

> 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.

> 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.

> Commodity and Commodity-linked Instruments Risk. Commodities and commodity-linked instruments will subject the fund’s portfolio to greater volatility than investments in traditional securities.Commodity-linked instruments may experience returns different than the commodity they attempt to track and may also be exposed to counterparty risk.

> High-Yield Fixed Income Securities (Junk Bonds) Risk. There is a greater risk of issuer default, less liquidity, and increased price volatility related to high-yield securities than investment grade securities.

> 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.

> 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.

> Leverage Risk. When a fund leverages its portfolio by borrowing or certain types of transactions or instruments, including derivatives, fund may be less liquid, may liquidate positions at an unfavorable time, and the volatility of the fund’s value may increase.

> Liquidity Risk. Certain instruments may be difficult or impossible to sell at a time and price beneficial to the fund.

 

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

> Short Sales Risk. The fund may engage in short sales and may incur a loss if the price of a borrowed security increases between the date of a short sale and the date on which the fund replaces the security.

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

> Unrated Fixed Income Securities Risk. If the subadviser is unable to accurately assess the quality of an unrated fixed income security, the fund may invest in a security with greater risk than intended, or the securities may be more difficult to sell than anticipated.
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 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 current subadviser commenced providing services for the fund in February 2020 and therefore the returns shown in the table for periods prior to that date reflect the performance of other investment professionals.

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. 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:

2020, Q2:

12.64%

Worst Quarter:

2020, Q1:

-23.12%
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 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.

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 Real Asset 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 (18.36%)
5 Years rr_AverageAnnualReturnYear05 5.23%
10 Years rr_AverageAnnualReturnYear10 7.98%
Virtus Duff & Phelps Real Asset Fund | Class A Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PDPAX
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 none
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.55%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.80%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.60% [1]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.30%) [2]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.30% [1],[2],[3]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 31, 2024
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. -
1 Year rr_ExpenseExampleYear01 $ 675
3 Years rr_ExpenseExampleYear03 999
5 Years rr_ExpenseExampleYear05 1,346
10 Years rr_ExpenseExampleYear10 2,322
1 Year rr_ExpenseExampleNoRedemptionYear01 675
3 Years rr_ExpenseExampleNoRedemptionYear03 999
5 Years rr_ExpenseExampleNoRedemptionYear05 1,346
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,322
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (8.03%)
5 Years rr_AverageAnnualReturnYear05 2.70%
10 Years rr_AverageAnnualReturnYear10 2.39%
Virtus Duff & Phelps Real Asset Fund | Class C Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol PDPCX
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% [4]
Management Fees rr_ManagementFeesOverAssets none
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.55%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.80%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.35% [1]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.30%) [2]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 2.05% [1],[2],[3]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 31, 2024
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock The deferred sales charge is imposed on Class C Shares redeemed during the first year only.
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.
1 Year rr_ExpenseExampleYear01 $ 308
3 Years rr_ExpenseExampleYear03 705
5 Years rr_ExpenseExampleYear05 1,228
10 Years rr_ExpenseExampleYear10 2,663
1 Year rr_ExpenseExampleNoRedemptionYear01 208
3 Years rr_ExpenseExampleNoRedemptionYear03 705
5 Years rr_ExpenseExampleNoRedemptionYear05 1,228
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,663
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (3.40%)
5 Years rr_AverageAnnualReturnYear05 3.06%
10 Years rr_AverageAnnualReturnYear10 2.18%
Virtus Duff & Phelps Real Asset Fund | Class I Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol VADIX
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 none
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.55%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.80%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.35% [1]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.30%) [2]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.05% [1],[2],[3]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 31, 2024
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. -
1 Year rr_ExpenseExampleYear01 $ 107
3 Years rr_ExpenseExampleYear03 398
5 Years rr_ExpenseExampleYear05 711
10 Years rr_ExpenseExampleYear10 1,598
1 Year rr_ExpenseExampleNoRedemptionYear01 107
3 Years rr_ExpenseExampleNoRedemptionYear03 398
5 Years rr_ExpenseExampleNoRedemptionYear05 711
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,598
Annual Return 2013 rr_AnnualReturn2013 1.30%
Annual Return 2014 rr_AnnualReturn2014 2.22%
Annual Return 2015 rr_AnnualReturn2015 (9.61%)
Annual Return 2016 rr_AnnualReturn2016 10.62%
Annual Return 2017 rr_AnnualReturn2017 8.38%
Annual Return 2018 rr_AnnualReturn2018 (9.16%)
Annual Return 2019 rr_AnnualReturn2019 17.19%
Annual Return 2020 rr_AnnualReturn2020 (2.71%)
Annual Return 2021 rr_AnnualReturn2021 21.17%
Annual Return 2022 rr_AnnualReturn2022 (2.42%)
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn none
Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 12.64%
Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (23.12%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (2.42%)
5 Years rr_AverageAnnualReturnYear05 4.13%
10 Years rr_AverageAnnualReturnYear10 3.23%
Virtus Duff & Phelps Real Asset Fund | Class I Shares | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (2.92%)
5 Years rr_AverageAnnualReturnYear05 3.56%
10 Years rr_AverageAnnualReturnYear10 2.75%
Virtus Duff & Phelps Real Asset 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 (1.44%)
5 Years rr_AverageAnnualReturnYear05 3.03%
10 Years rr_AverageAnnualReturnYear10 2.41%
Virtus Duff & Phelps Real Asset Fund | Class R6 Shares  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol VAABX
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 none
Distribution and Shareholder Servicing (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.52%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.80%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.32% [1]
Less: Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%) [2]
Total Annual Fund Operating Expenses After Expense Reimbursement rr_NetExpensesOverAssets 1.00% [1],[2],[3]
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 31, 2024
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. -
1 Year rr_ExpenseExampleYear01 $ 102
3 Years rr_ExpenseExampleYear03 387
5 Years rr_ExpenseExampleYear05 693
10 Years rr_ExpenseExampleYear10 1,562
1 Year rr_ExpenseExampleNoRedemptionYear01 102
3 Years rr_ExpenseExampleNoRedemptionYear03 387
5 Years rr_ExpenseExampleNoRedemptionYear05 693
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,562
[1]

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.
[2]

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 0.50% for Class A Shares, 1.25% for Class C Shares, 0.25% for Class I Shares and 0.20% for Class R6 Shares through January 31, 2024. 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.
[3]

Not included in the table are extraordinary proxy expenses. If such amounts were reflected in this table, the Total Annual Fund Operating Expenses After Expense Reduction/Reimbursement would have been 1.31% for Class A Shares, 2.07% for Class C Shares, 1.07% for Class I Shares and 1.02% for Class R6 Shares.
[4]

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