Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Voya MUTUAL FUNDS
Prospectus Date	rr_ProspectusDate	Feb. 27, 2015
Voya International Real Estate Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Voya International Real Estate Fund  (formerly, ING International Real Estate Fund)
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund seeks to provide investors with high total return.
Expense [Heading]	rr_ExpenseHeading	FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	These tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Voya mutual funds. More information about these and other discounts is available from your financial professional and in the discussion in the Sales Charges section of the Prospectus (page 92) or the Purchase, Exchange, and Redemption of Shares section of the Statement of Additional Information (page 134).
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 you pay each year as a % of the value of your investment
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	March 1, 2016
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 mean higher taxes if you are investing in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Expense Examples, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 67% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	67.00%
Expenses Deferred Charges [Text Block]	rr_ExpensesDeferredChargesTextBlock	A contingent deferred sales charge of 1.00% is assessed on certain redemptions of Class A shares made within 18 months after purchase where no initial sales charge was paid at the time of purchase as part of an investment of $1 million or more.
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Voya mutual funds.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	50,000
Expense Example [Heading]	rr_ExpenseExampleHeading	Expense Examples
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The Examples are intended to help you compare the cost of investing in shares of the Fund with the costs of investing in other mutual funds. The Examples assume that you invest $10,000 in the Fund for the time periods indicated. The Examples show costs if you sold (redeemed) your shares at the end of the period or continued to hold them. The Examples also assume that your investment had a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example Closing [Text Block]	rr_ExpenseExampleClosingTextBlock	The Examples reflect applicable expense limitation agreements and/or waivers in effect, if any, for the one-year period and the first year of the three-, five-, and ten-year periods.
Strategy [Heading]	rr_StrategyHeading	PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Under normal market conditions, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in a portfolio of equity securities of companies that are principally engaged in the real estate industry. The Fund will provide shareholders with at least 60 days' prior notice of any change in this investment policy. At least 65% of the Fund's assets will normally be invested in companies located in a number of different countries other than the United States. These companies may have investments that provide exposure to the U.S. real estate industry. The sub-adviser ("Sub-Adviser") defines a real estate company as a company that: (i) derives at least 50% of its total revenue or earnings from owning, operating, developing, constructing, financing, managing and/or selling commercial, industrial, or residential real estate; or (ii) has at least 50% of its assets invested in real estate. As a general matter, the Fund expects these investments to be in common stocks of companies of any market capitalization, including real estate investment trusts. The Fund may invest in companies located in countries with emerging securities markets. The Fund may also invest in convertible securities, initial public offerings, and Rule 144A securities. The Fund may invest in other investment companies, including exchange-traded funds, to the extent permitted under the Investment Company Act of 1940, as amended, and the rules, regulations, and exemptive orders thereunder ("1940 Act"). The Sub-Adviser uses a multi-step investment process for constructing the Fund's investment portfolio that combines top-down region and sector allocation with bottom-up individual stock selection. First, the Sub-Adviser selects sectors and geographic regions in which to invest and determines the degree of representation of such sectors and regions through a systematic evaluation of public and private property market trends and conditions. Second, the Sub-Adviser uses an in-house valuation process to identify investments with superior current income and growth potential relative to their peers. This in-house valuation process examines several factors including: value and property; capital structure; and management and strategy. The Sub-Adviser may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into opportunities believed to be more promising, among others. The Fund may lend portfolio securities on a short-term or long-term basis, up to 33 1⁄3% of its total assets.
Strategy Portfolio Concentration [Text]	rr_StrategyPortfolioConcentration	Under normal market conditions, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in a portfolio of equity securities of companies that are principally engaged in the real estate industry. The Fund will provide shareholders with at least 60 days' prior notice of any change in this investment policy.
Risk [Heading]	rr_RiskHeading	PRINCIPAL RISKS
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	You could lose money on an investment in the Fund. Any of the following risks, among others, could affect Fund performance or cause the Fund to lose money or to underperform market averages of other funds. Company    The price of a given company's stock could decline or underperform for many reasons including, among others, poor management, financial problems, or business challenges. If a company declares bankruptcy or becomes insolvent, its stock could become worthless. Concentration    As a result of the Fund "concentrating," as that term is defined in the 1940 Act, its assets in the securities of a particular industry or group of industries or single country or region, the Fund may be subject to greater market fluctuations than a fund that has securities representing a broader range of investment alternatives. If securities in which the Fund concentrates fall out of favor, the Fund could underperform funds that have greater diversification. Convertible Securities    Convertible securities are securities that are convertible into or exercisable for common stocks at a stated price or rate. Convertible securities are subject to the usual risks associated with debt securities, such as interest rate and credit risk. In addition, because convertible securities react to changes in the value of the stocks into which they convert, they are subject to market risk. Credit    Prices of bonds and other debt instruments can fall if the issuer's actual or perceived financial health deteriorates, whether because of broad economic or issuer-specific reasons. In certain cases, the issuer could be late in paying interest or principal, or could fail to pay altogether. Currency    To the extent that the Fund invests directly in foreign (non-U.S.) currencies or in securities denominated in, or that trade in, foreign (non-U.S.) currencies, it is subject to the risk that those foreign (non-U.S.) currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency being hedged. Foreign Investments/Developing and Emerging Markets    Investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies due to: smaller markets; differing reporting, accounting, and auditing standards; nationalization, expropriation, or confiscatory taxation; foreign currency fluctuations, currency blockage, or replacement; potential for default on sovereign debt; or political changes or diplomatic developments. Markets and economies throughout the world are becoming increasingly interconnected, and conditions or events in one market, country or region may adversely impact investments or issuers in another market, country or region. Foreign investment risks may be greater in developing and emerging markets than in developed markets. Initial Public Offerings    Initial Public Offerings ("IPOs") and companies that have recently gone public have the potential to produce substantial gains for the Fund. However, there is no assurance that the Fund will have access to profitable IPOs or that IPOs in which the Fund invests will rise in value. Furthermore, the value of securities of newly public companies may decline in value shortly after the IPO. When the Fund's asset base is small, the impact of such investments on the Fund's return will be magnified. If the Fund's assets grow, it is likely that the effect of the Fund's investment in IPOs on the Fund's return will decline. Interest Rate    With bonds and other fixed rate debt instruments, a rise in interest rates generally causes values to fall; conversely, values generally rise as interest rates fall. The higher the credit quality of the instrument, and the longer its maturity or duration, the more sensitive it is likely to be to interest rate risk. In the case of inverse securities, the interest rate generally will decrease when the market rate of interest to which the inverse security is indexed increases. As of the date of this Prospectus, interest rates in the United States are at or near historic lows, which may increase the Fund's exposure to risks associated with rising interest rates. Rising interest rates could have unpredictable effects on the markets and may expose fixed-income and related markets to heightened volatility. For fixed-income securities, an increase in interest rates may lead to increased redemptions and increased portfolio turnover, which could reduce liquidity for certain Fund investments, adversely affect values, and increase a Fund's costs. If dealer capacity in fixed-income markets is insufficient for market conditions, it may further inhibit liquidity and increase volatility in the fixed-income markets. Investment Model    The manager's proprietary model may not adequately allow for existing or unforeseen market factors or the interplay between such factors. Liquidity    If a security is illiquid, the Fund might be unable to sell the security at a time when the Fund's manager might wish to sell, and the security could have the effect of decreasing the overall level of the Fund's liquidity. Further, the lack of an established secondary market may make it more difficult to value illiquid securities, which could vary from the amount the Fund could realize upon disposition. The Fund may make investments that become less liquid in response to market developments or adverse investor perception. The Fund could lose money if it cannot sell a security at the time and price that would be most beneficial to the Fund. Market    Stock prices may be volatile and are affected by the real or perceived impacts of such factors as economic conditions and political events. Stock markets tend to be cyclical, with periods when stock prices generally rise and periods when stock prices generally decline. Any given stock market segment may remain out of favor with investors for a short or long period of time, and stocks as an asset class may underperform bonds or other asset classes during some periods. Additionally, legislative, regulatory or tax policies or developments in these areas may adversely impact the investment techniques available to a manager, add to Fund costs and impair the ability of the Fund to achieve its investment objectives. Market Capitalization    Stocks fall into three broad market capitalization categories - large, mid, and small. Investing primarily in one category carries the risk that, due to current market conditions, that category may be out of favor with investors. If valuations of large-capitalization companies appear to be greatly out of proportion to the valuations of mid- or small-capitalization companies, investors may migrate to the stocks of mid- and small-sized companies causing the Fund that invests in these companies to increase in value more rapidly than a fund that invests in larger, fully-valued companies. Investing in mid- and small-capitalization companies may be subject to special risks associated with narrower product lines, more limited financial resources, smaller management groups, and a more limited trading market for their stocks as compared with larger companies. As a result, stocks of mid- and small-capitalization companies may decline significantly in market downturns. Other Investment Companies    The main risk of investing in other investment companies, including exchange-traded funds, is the risk that the value of the securities underlying an investment company might decrease. Because the Fund may invest in other investment companies, you will pay a proportionate share of the expenses of those other investment companies (including management fees, administration fees, and custodial fees) in addition to the expenses of the Fund. Real Estate Companies and Real Estate Investment Trusts ("REITs")    Investing in real estate companies and REITs may subject the Fund to risks similar to those associated with the direct ownership of real estate, including losses from casualty or condemnation, changes in local and general economic conditions, supply and demand, interest rates, zoning laws, regulatory limitations on rents, property taxes, and operating expenses in addition to terrorist attacks, war, or other acts that destroy real property. Securities Lending    Securities lending involves two primary risks: "investment risk" and "borrower default risk." Investment risk is the risk that the Fund will lose money from the investment of the cash collateral received from the borrower. Borrower default risk is the risk that the Fund will lose money due to the failure of a borrower to return a borrowed security in a timely manner. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	You could lose money on an investment in the Fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	PERFORMANCE INFORMATION
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following information is intended to help you understand the risks of investing in the Fund. The following bar chart shows the changes in the Fund's performance from year to year, and the table compares the Fund's performance to the performance of a broad-based securities market index/indices for the same period. The Fund's performance information reflects applicable fee waivers and/or expense limitations in effect during the period presented. Absent such fee waivers/expense limitations, if any, performance would have been lower. The bar chart shows the performance of the Fund's Class A shares. Sales charges are not reflected in the bar chart. If they were, returns would be less than those shown. However, the table includes all applicable fees and sales charges. Other class shares' performance would be higher or lower than Class A shares' performance because of the higher or lower expenses paid by Class A shares. The Fund's past performance (before and after taxes) is no guarantee of future results. For the most recent performance figures, go to www.voyainvestments.com/literature or call 1-800-992-0180.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following bar chart shows the changes in the Fund's performance from year to year, and the table compares the Fund's performance to the performance of a broad-based securities market index/indices for the same period.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-800-992-0180
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.voyainvestments.com/literature
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The Fund's past performance (before and after taxes) is no guarantee of future results.
Bar Chart [Heading]	rr_BarChartHeading	Calendar Year Total Returns Class A (as of December 31 of each year)
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	Sales charges are not reflected in the bar chart. If they were, returns would be less than those shown.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Best quarter: 2nd, 2009, 32.42% and Worst quarter: 4th, 2008, -23.95%
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns % (for the periods ended December 31, 2014)
Performance Table Does Reflect Sales Loads	rr_PerformanceTableDoesReflectSalesLoads	However, the table includes all applicable fees and sales charges.
Performance Table Market Index Changed	rr_PerformanceTableMarketIndexChanged	On July 31, 2014, the Fund changed its primary benchmark from the S&P Developed ex-U.S. Property Index to the FTSE EPRA/NAREIT Developed ex U.S. Index because the FTSE EPRA/NAREIT Developed ex U.S. Index is considered by the Adviser to be a more appropriate benchmark reflecting the types of securities in which the Fund invests.
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	The index returns do not reflect deductions for fees, expenses, or taxes.
Index No Deduction for Fees Expenses Taxes Two [Text]	vmf_IndexNoDeductionForFeesExpensesTaxesTwo	The index returns include the reinvestment of dividends and distributions net of withholding taxes, but do not reflect fees, brokerage commissions, or other expenses.
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 an investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns are shown for Class A shares only. After-tax returns for other classes will vary.
Performance Table Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	In some cases the after-tax returns may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period.
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. In some cases the after-tax returns may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. After-tax returns are shown for Class A shares only. After-tax returns for other classes will vary.
Voya International Real Estate Fund | Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) as a % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%
Maximum deferred sales charge as a % of purchase or sales price, whichever is less	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Management Fees	rr_ManagementFeesOverAssets	0.93%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.14%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.42%
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	none	[2]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	1.42%
1 Yr	rr_ExpenseExampleYear01	711
3 Yrs	rr_ExpenseExampleYear03	998
5 Yrs	rr_ExpenseExampleYear05	1,307
10 Yrs	rr_ExpenseExampleYear10	2,179
1 Yr	rr_ExpenseExampleNoRedemptionYear01	711
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	998
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	1,307
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	2,179
2005	rr_AnnualReturn2005
2006	rr_AnnualReturn2006
2007	rr_AnnualReturn2007	0.61%
2008	rr_AnnualReturn2008	(45.95%)
2009	rr_AnnualReturn2009	35.21%
2010	rr_AnnualReturn2010	11.42%
2011	rr_AnnualReturn2011	(15.56%)
2012	rr_AnnualReturn2012	36.79%
2013	rr_AnnualReturn2013	5.97%
2014	rr_AnnualReturn2014	2.46%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	32.42%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(23.95%)
1 Yr	rr_AverageAnnualReturnYear01	(3.46%)
5 Yrs	rr_AverageAnnualReturnYear05	5.66%
10 Yrs	rr_AverageAnnualReturnYear10
Since Inception	rr_AverageAnnualReturnSinceInception	2.70%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 28, 2006
Voya International Real Estate Fund | Class B
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) as a % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge as a % of purchase or sales price, whichever is less	rr_MaximumDeferredSalesChargeOverOther	5.00%
Management Fees	rr_ManagementFeesOverAssets	0.93%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.14%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.17%
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	none	[2]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	2.17%
1 Yr	rr_ExpenseExampleYear01	720
3 Yrs	rr_ExpenseExampleYear03	979
5 Yrs	rr_ExpenseExampleYear05	1,364
10 Yrs	rr_ExpenseExampleYear10	2,313
1 Yr	rr_ExpenseExampleNoRedemptionYear01	220
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	679
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	1,164
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	2,313
1 Yr	rr_AverageAnnualReturnYear01	(3.25%)
5 Yrs	rr_AverageAnnualReturnYear05	5.79%
10 Yrs	rr_AverageAnnualReturnYear10
Since Inception	rr_AverageAnnualReturnSinceInception	2.62%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 28, 2006
Voya International Real Estate Fund | Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) as a % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge as a % of purchase or sales price, whichever is less	rr_MaximumDeferredSalesChargeOverOther	1.00%
Management Fees	rr_ManagementFeesOverAssets	0.93%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.14%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.17%
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	none	[2]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	2.17%
1 Yr	rr_ExpenseExampleYear01	320
3 Yrs	rr_ExpenseExampleYear03	679
5 Yrs	rr_ExpenseExampleYear05	1,164
10 Yrs	rr_ExpenseExampleYear10	2,503
1 Yr	rr_ExpenseExampleNoRedemptionYear01	220
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	679
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	1,164
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	2,503
1 Yr	rr_AverageAnnualReturnYear01	0.71%
5 Yrs	rr_AverageAnnualReturnYear05	6.14%
10 Yrs	rr_AverageAnnualReturnYear10
Since Inception	rr_AverageAnnualReturnSinceInception	2.61%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 28, 2006
Voya International Real Estate Fund | Class I
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) as a % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge as a % of purchase or sales price, whichever is less	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.93%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.09%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.12%
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	none	[2]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	1.12%
1 Yr	rr_ExpenseExampleYear01	114
3 Yrs	rr_ExpenseExampleYear03	356
5 Yrs	rr_ExpenseExampleYear05	617
10 Yrs	rr_ExpenseExampleYear10	1,363
1 Yr	rr_ExpenseExampleNoRedemptionYear01	114
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	356
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	617
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	1,363
1 Yr	rr_AverageAnnualReturnYear01	2.77%
5 Yrs	rr_AverageAnnualReturnYear05	7.23%
10 Yrs	rr_AverageAnnualReturnYear10
Since Inception	rr_AverageAnnualReturnSinceInception	3.70%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 28, 2006
Voya International Real Estate Fund | Class W
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) as a % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge as a % of purchase or sales price, whichever is less	rr_MaximumDeferredSalesChargeOverOther	none
Management Fees	rr_ManagementFeesOverAssets	0.93%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.14%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.17%
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	none	[2]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	1.17%
1 Yr	rr_ExpenseExampleYear01	119
3 Yrs	rr_ExpenseExampleYear03	372
5 Yrs	rr_ExpenseExampleYear05	644
10 Yrs	rr_ExpenseExampleYear10	1,420
1 Yr	rr_ExpenseExampleNoRedemptionYear01	119
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	372
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	644
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	1,420
1 Yr	rr_AverageAnnualReturnYear01	2.71%
5 Yrs	rr_AverageAnnualReturnYear05	7.18%
10 Yrs	rr_AverageAnnualReturnYear10
Since Inception	rr_AverageAnnualReturnSinceInception	1.65%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 12, 2008
Voya International Real Estate Fund | After tax on distributions | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	(5.05%)
5 Yrs	rr_AverageAnnualReturnYear05	4.08%
10 Yrs	rr_AverageAnnualReturnYear10
Since Inception	rr_AverageAnnualReturnSinceInception	1.32%
Voya International Real Estate Fund | After tax on distributions with sale | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	(1.68%)
5 Yrs	rr_AverageAnnualReturnYear05	3.94%
10 Yrs	rr_AverageAnnualReturnYear10
Since Inception	rr_AverageAnnualReturnSinceInception	1.71%
Voya International Real Estate Fund | FTSE EPRA/NAREIT Developed ex U.S. Index | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	2.84%	[3],[4]
5 Yrs	rr_AverageAnnualReturnYear05	7.93%	[3],[4]
10 Yrs	rr_AverageAnnualReturnYear10		[3],[4]
Since Inception	rr_AverageAnnualReturnSinceInception	3.37%	[3],[4]
Voya International Real Estate Fund | FTSE EPRA/NAREIT Developed ex U.S. Index | Class B
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	2.84%	[3],[4]
5 Yrs	rr_AverageAnnualReturnYear05	7.93%	[3],[4]
10 Yrs	rr_AverageAnnualReturnYear10		[3],[4]
Since Inception	rr_AverageAnnualReturnSinceInception	3.37%	[3],[4]
Voya International Real Estate Fund | FTSE EPRA/NAREIT Developed ex U.S. Index | Class C
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	2.84%	[3],[4]
5 Yrs	rr_AverageAnnualReturnYear05	7.93%	[3],[4]
10 Yrs	rr_AverageAnnualReturnYear10		[3],[4]
Since Inception	rr_AverageAnnualReturnSinceInception	3.37%	[3],[4]
Voya International Real Estate Fund | FTSE EPRA/NAREIT Developed ex U.S. Index | Class I
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	2.84%	[3],[4]
5 Yrs	rr_AverageAnnualReturnYear05	7.93%	[3],[4]
10 Yrs	rr_AverageAnnualReturnYear10		[3],[4]
Since Inception	rr_AverageAnnualReturnSinceInception	3.37%	[3],[4]
Voya International Real Estate Fund | FTSE EPRA/NAREIT Developed ex U.S. Index | Class W
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	2.84%	[3],[4]
5 Yrs	rr_AverageAnnualReturnYear05	7.93%	[3],[4]
10 Yrs	rr_AverageAnnualReturnYear10		[3],[4]
Since Inception	rr_AverageAnnualReturnSinceInception	1.50%	[3],[4]
Voya International Real Estate Fund | S&P 500® Index | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	13.69%	[5]
5 Yrs	rr_AverageAnnualReturnYear05	15.45%	[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
Since Inception	rr_AverageAnnualReturnSinceInception	7.79%	[5]
Voya International Real Estate Fund | S&P 500® Index | Class B
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	13.69%	[5]
5 Yrs	rr_AverageAnnualReturnYear05	15.45%	[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
Since Inception	rr_AverageAnnualReturnSinceInception	7.79%	[5]
Voya International Real Estate Fund | S&P 500® Index | Class C
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	13.69%	[5]
5 Yrs	rr_AverageAnnualReturnYear05	15.45%	[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
Since Inception	rr_AverageAnnualReturnSinceInception	7.79%	[5]
Voya International Real Estate Fund | S&P 500® Index | Class I
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	13.69%	[5]
5 Yrs	rr_AverageAnnualReturnYear05	15.45%	[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
Since Inception	rr_AverageAnnualReturnSinceInception	7.79%	[5]
Voya International Real Estate Fund | S&P 500® Index | Class W
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	13.69%	[5]
5 Yrs	rr_AverageAnnualReturnYear05	15.45%	[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
Since Inception	rr_AverageAnnualReturnSinceInception	8.89%	[5]
Voya International Real Estate Fund | S&P Developed ex-U.S. Property Index | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	3.94%	[4],[5]
5 Yrs	rr_AverageAnnualReturnYear05	9.45%	[4],[5]
10 Yrs	rr_AverageAnnualReturnYear10		[4],[5]
Since Inception	rr_AverageAnnualReturnSinceInception	4.04%	[4],[5]
Voya International Real Estate Fund | S&P Developed ex-U.S. Property Index | Class B
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	3.94%	[4],[5]
5 Yrs	rr_AverageAnnualReturnYear05	9.45%	[4],[5]
10 Yrs	rr_AverageAnnualReturnYear10		[4],[5]
Since Inception	rr_AverageAnnualReturnSinceInception	4.04%	[4],[5]
Voya International Real Estate Fund | S&P Developed ex-U.S. Property Index | Class C
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	3.94%	[4],[5]
5 Yrs	rr_AverageAnnualReturnYear05	9.45%	[4],[5]
10 Yrs	rr_AverageAnnualReturnYear10		[4],[5]
Since Inception	rr_AverageAnnualReturnSinceInception	4.04%	[4],[5]
Voya International Real Estate Fund | S&P Developed ex-U.S. Property Index | Class I
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	3.94%	[4],[5]
5 Yrs	rr_AverageAnnualReturnYear05	9.45%	[4],[5]
10 Yrs	rr_AverageAnnualReturnYear10		[4],[5]
Since Inception	rr_AverageAnnualReturnSinceInception	4.04%	[4],[5]
Voya International Real Estate Fund | S&P Developed ex-U.S. Property Index | Class W
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	3.94%	[4],[5]
5 Yrs	rr_AverageAnnualReturnYear05	9.45%	[4],[5]
10 Yrs	rr_AverageAnnualReturnYear10		[4],[5]
Since Inception	rr_AverageAnnualReturnSinceInception	2.61%	[4],[5]

[1] A contingent deferred sales charge of 1.00% is assessed on certain redemptions of Class A shares made within 18 months after purchase where no initial sales charge was paid at the time of purchase as part of an investment of $1 million or more.

[2] The adviser and sub-adviser are contractually obligated to limit expenses to 1.50%, 2.25%, 2.25%, 1.25%, and 1.25% for Class A, Class B, Class C, Class I, and Class W shares, respectively, through March 1, 2016. This limitation is subject to possible recoupment by the adviser and sub-adviser within 36 months of the waiver or reimbursement. In addition, the adviser and sub-adviser are contractually obligated to further limit expenses whereby the sub-adviser will pay the incremental costs necessary to further limit expenses to 1.45%, 2.20%, 2.20%, 1.20%, and 1.20% for Class A, Class B, Class C, Class I, and Class W shares, respectively, through March 1, 2016. The limitations do not extend to interest, taxes, brokerage commissions, extraordinary expenses, and Acquired Fund Fees and Expenses. Termination or modification of these obligations requires approval by the Fund's board.

[3] The index returns include the reinvestment of dividends and distributions net of withholding taxes, but do not reflect fees, brokerage commissions, or other expenses.

[4] On July 31, 2014, the Fund changed its primary benchmark from the S&P Developed ex-U.S. Property Index to the FTSE EPRA/NAREIT Developed ex U.S. Index because the FTSE EPRA/NAREIT Developed ex U.S. Index is considered by the Adviser to be a more appropriate benchmark reflecting the types of securities in which the Fund invests.

[5] The index returns do not reflect deductions for fees, expenses, or taxes.