Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	ING MUTUAL FUNDS
Prospectus Date	rr_ProspectusDate	Feb. 28, 2013
ING Emerging Markets Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	ING Emerging Markets Equity Fund
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund seeks long-term capital appreciation.
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 ING 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 103) or the Statement of Additional Information (page 200).
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, 2014
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover % of average value of portfolio
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 transactions 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 84% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	84.00%
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 ING Funds.
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	50,000
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]	rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees	Total Annual Fund Operating Expenses may be higher than the Fund’s ratio of expenses to average net assets shown in the Fund’s Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.
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 equity securities of issuers in emerging markets. The Fund will provide shareholders with at least 60 days’ prior notice of any change in this investment policy. Developing or emerging countries include most countries in the world except Australia, Canada, Japan, New Zealand, Hong Kong, Singapore, the United Kingdom, the United States, and most of the countries of Western Europe. An emerging market company is one that is organized under the laws of, or has a principal place of business in, an emerging market; where the principal securities market is in an emerging market; that derives at least 50% of its total revenues or profits from goods that are produced or sold, investments made, or services performed in an emerging market; or at least 50% of the assets of which are located in an emerging market. The Fund may invest in companies of any market capitalization. Equity securities may include common stock, preferred stock, convertible securities, depositary receipts, participatory notes, trust or partnership interests, warrants and rights to buy common stock, and privately placed securities. The Fund may also invest in real estate investment trusts and non-investment-grade bonds (high-yield or “junk bonds”). The Fund may invest in derivatives, including but not limited to, futures, options, swaps, and forwards as a substitute for securities in which the Fund can invest; to hedge various investments; to seek to reduce currency deviations, where practicable, for the purpose of risk management; to seek to increase the Fund’s gains; and for the efficient management of cash flows. The Fund may invest in securities denominated in U.S. dollars, major reserve currencies, and currencies of other countries in which it can invest. The Fund typically maintains full currency exposure to those markets in which it invests. However, the Fund may, from time to time, hedge a portion of its foreign currency exposure into the U.S. dollar. 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”). Delaware Management Company (“Delaware Management”) and J.P. Morgan Investment Management Inc. (“JPMorgan”) (each a “Sub-Adviser” and collectively “Sub-Advisers”) provide the day-to-day management of the Fund. The Sub-Advisers act independently of each other and use their own methodology for selecting investments. ING Investments, LLC, the Fund’s investment adviser, will determine the amount of Fund assets allocated to each Sub-Adviser. Each 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 331 / 3 % of its total assets. Delaware Management Company Delaware Management selects growth-oriented and value-oriented investments on the basis of the investment’s discount to its intrinsic value. When selecting growth-oriented securities, Delaware Management typically seeks high growth caused by secular economic factors. These factors may include demographics, economic deregulation, and technological developments. When selecting value-oriented securities, Delaware Management typically seeks lower valuations caused by cyclical economic factors or temporary changes in business operations. Strong management and sustainable business franchise are key considerations in selecting both growth-oriented and value-oriented securities. In order to compare the value of different stocks, Delaware Management considers whether the future income stream on a stock is expected to increase faster than, slower than, or in line with the level of inflation. Delaware Management then estimates what it thinks the value of the anticipated future income stream would be worth if such income stream were being paid today. Delaware Management believes this gives it an estimate of the stock’s intrinsic value. Because the Fund invests primarily in emerging countries, there may be less information available for Delaware Management to use in making this analysis than is available for more developed countries. Currency analysis is an important part of the valuation exercise. Delaware Management attempts to determine whether a particular currency is overvalued or undervalued by comparing the amount of goods and services that a dollar will buy in the United States to the amount of foreign currency required to buy the same amount of goods and services in another country. When the dollar buys less, the foreign currency may be overvalued, and when the dollar buys more, the foreign currency may be undervalued. Relative per capita income levels are also a key factor in this analysis. J.P. Morgan Investment Management Inc. JPMorgan emphasizes securities that it believes are ranked as undervalued, while underweighting or avoiding securities that appear overvalued. JPMorgan believes that emerging markets are generally inefficient as demonstrated by the high and variable volatility of many emerging markets and individual companies in these markets. Corporate disclosure and transparency can vary widely thereby exacerbating the inefficiency of these markets and offering opportunities to experienced, well-informed active investors. In managing its portion of the Fund, JPMorgan adheres to a disciplined process for stock selection and portfolio construction. A proprietary multi-factor model is used to quantitatively rank securities in the Fund’s investment universe which JPMorgan uses to select securities. Securities held in the Fund that JPMorgan believes have become overvalued and/or whose factor signals have deteriorated materially may be sold and are generally replaced with more attractive securities on the basis of JPMorgan’s disciplined investment process. The portfolio construction process controls the sector and industry weights, number of stocks held, and position size. Risk or factor exposures are actively managed through portfolio construction. JPMorgan utilizes currency specialists in determining the extent and nature of the Fund’s exposure to various foreign currencies.
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. Call   During periods of falling interest rates, a bond issuer may “call” or repay its high-yielding bond before the bond’s maturity date. If forced to invest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income. 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. 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 (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. Derivative Instruments   Derivative instruments are subject to a number of risks, including the risk of changes in the market price of the underlying securities, credit risk with respect to the counterparty, risk of loss due to changes in interest rates and liquidity risk. The use of certain derivatives may also have a leveraging effect which may increase the volatility of the Fund and reduce its returns. 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. Foreign investment risks may be greater in developing and emerging markets than in developed markets. High-Yield Securities   Investments rated below investment-grade (or of similar quality if unrated) are known as “high-yield securities” or “junk bonds.” High-yield securities are subject to greater levels of credit and liquidity risks. High-yield securities are considered primarily speculative with respect to the issuer’s continuing ability to make principal and interest payments. 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 decreases. 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. The stock market tends 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. From time to time, the stock market may not favor the growth- or value-oriented securities in which the Fund invests. Rather, the market could favor securities to which the Fund is not exposed or may not favor equities at all. 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 Fund’s performance for the first full calendar year of operations, 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.INGFunds.com/literature or call 1-800-992-0180. Because Class B shares of the Fund did not have a full calendar year of operations as of December 31, 2012, no performance information for Class B shares is provided below.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following bar chart shows the Fund’s performance for the first full calendar year of operations, and the table compares the Fund’s performance to the performance of a broad-based securities market index/indices for the same period.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	Because Class B shares of the Fund did not have a full calendar year of operations as of December 31, 2012, no performance information for Class B shares is provided below.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-800-992-0180
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.INGFunds.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: 1st 2012, 13.89% and Worst quarter: 2nd 2012, (10.55)%
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns% (for the periods ended December 31, 2012)
Performance Table Does Reflect Sales Loads	rr_PerformanceTableDoesReflectSalesLoads	However, the table includes all applicable fees and sales charges.
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	The index returns include the reinvestment of dividends and distributions net of withholding taxes, but do not reflect fees, brokerage commissions, or other expenses.
ING Emerging Markets Equity 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 Fee	rr_ManagementFeesOverAssets	1.00%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.28%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.64%	[2]
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[3]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	1.61%
1 Yr	rr_ExpenseExampleYear01	729
3 Yrs	rr_ExpenseExampleYear03	1,060
5 Yrs	rr_ExpenseExampleYear05	1,413
10 Yrs	rr_ExpenseExampleYear10	2,405
1 Yr	rr_ExpenseExampleNoRedemptionYear01	729
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	1,060
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	1,413
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	2,405
2003	rr_AnnualReturn2003
2004	rr_AnnualReturn2004
2005	rr_AnnualReturn2005
2006	rr_AnnualReturn2006
2007	rr_AnnualReturn2007
2008	rr_AnnualReturn2008
2009	rr_AnnualReturn2009
2010	rr_AnnualReturn2010
2011	rr_AnnualReturn2011
2012	rr_AnnualReturn2012	15.25%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	13.89%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2012
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(10.55%)
1 Yr	rr_AverageAnnualReturnYear01	8.61%
5 Yrs	rr_AverageAnnualReturnYear05
10 Yrs	rr_AverageAnnualReturnYear10
since inception	rr_AverageAnnualReturnSinceInception	8.76%
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 11, 2011
ING Emerging Markets Equity 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 Fee	rr_ManagementFeesOverAssets	1.00%	[4]
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%	[4]
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%	[4]
Other Expenses	rr_OtherExpensesOverAssets	0.28%	[4]
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%	[4]
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.39%	[2],[4]
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[3],[4]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	2.36%	[4]
1 Yr	rr_ExpenseExampleYear01	739
3 Yrs	rr_ExpenseExampleYear03	1,043
5 Yrs	rr_ExpenseExampleYear05	1,473
10 Yrs	rr_ExpenseExampleYear10	2,538
1 Yr	rr_ExpenseExampleNoRedemptionYear01	239
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	743
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	1,273
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	2,538
ING Emerging Markets Equity 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 Fee	rr_ManagementFeesOverAssets	1.00%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.28%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.39%	[2]
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[3]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	2.36%
1 Yr	rr_ExpenseExampleYear01	339
3 Yrs	rr_ExpenseExampleYear03	743
5 Yrs	rr_ExpenseExampleYear05	1,273
10 Yrs	rr_ExpenseExampleYear10	2,724
1 Yr	rr_ExpenseExampleNoRedemptionYear01	239
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	743
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	1,273
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	2,724
1 Yr	rr_AverageAnnualReturnYear01	13.41%
5 Yrs	rr_AverageAnnualReturnYear05
10 Yrs	rr_AverageAnnualReturnYear10
since inception	rr_AverageAnnualReturnSinceInception	13.31%
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 11, 2011
ING Emerging Markets Equity 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 Fee	rr_ManagementFeesOverAssets	1.00%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.28%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.39%	[2]
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.13%)	[3]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	1.26%
1 Yr	rr_ExpenseExampleYear01	128
3 Yrs	rr_ExpenseExampleYear03	427
5 Yrs	rr_ExpenseExampleYear05	748
10 Yrs	rr_ExpenseExampleYear10	1,657
1 Yr	rr_ExpenseExampleNoRedemptionYear01	128
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	427
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	748
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	1,657
1 Yr	rr_AverageAnnualReturnYear01	15.52%
5 Yrs	rr_AverageAnnualReturnYear05
10 Yrs	rr_AverageAnnualReturnYear10
since inception	rr_AverageAnnualReturnSinceInception	14.51%
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 11, 2011
ING Emerging Markets Equity Fund | Class R
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 Fee	rr_ManagementFeesOverAssets	1.00%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.28%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.89%	[2]
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[3]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	1.86%
1 Yr	rr_ExpenseExampleYear01	189
3 Yrs	rr_ExpenseExampleYear03	591
5 Yrs	rr_ExpenseExampleYear05	1,018
10 Yrs	rr_ExpenseExampleYear10	2,209
1 Yr	rr_ExpenseExampleNoRedemptionYear01	189
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	591
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	1,018
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	2,209
1 Yr	rr_AverageAnnualReturnYear01	14.98%
5 Yrs	rr_AverageAnnualReturnYear05
10 Yrs	rr_AverageAnnualReturnYear10
since inception	rr_AverageAnnualReturnSinceInception	13.86%
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 11, 2011
ING Emerging Markets Equity 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 Fee	rr_ManagementFeesOverAssets	1.00%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.28%
Acquired Fund Fees and Expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.01%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.39%	[2]
Waivers and Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.03%)	[3]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	1.36%
1 Yr	rr_ExpenseExampleYear01	138
3 Yrs	rr_ExpenseExampleYear03	437
5 Yrs	rr_ExpenseExampleYear05	758
10 Yrs	rr_ExpenseExampleYear10	1,666
1 Yr	rr_ExpenseExampleNoRedemptionYear01	138
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	437
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	758
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	1,666
1 Yr	rr_AverageAnnualReturnYear01	15.53%
5 Yrs	rr_AverageAnnualReturnYear05
10 Yrs	rr_AverageAnnualReturnYear10
since inception	rr_AverageAnnualReturnSinceInception	14.43%
Inception Date	rr_AverageAnnualReturnInceptionDate	Oct. 11, 2011
ING Emerging Markets Equity Fund | After tax on distributions | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	8.25%
5 Yrs	rr_AverageAnnualReturnYear05
10 Yrs	rr_AverageAnnualReturnYear10
since inception	rr_AverageAnnualReturnSinceInception	8.38%
ING Emerging Markets Equity Fund | After tax on distributions with sale | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	6.12%
5 Yrs	rr_AverageAnnualReturnYear05
10 Yrs	rr_AverageAnnualReturnYear10
since inception	rr_AverageAnnualReturnSinceInception	7.42%
ING Emerging Markets Equity Fund | MSCI Emerging Markets Index℠ | Class A
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	18.22%	[5]
5 Yrs	rr_AverageAnnualReturnYear05		[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
since inception	rr_AverageAnnualReturnSinceInception	15.61%	[5]
ING Emerging Markets Equity Fund | MSCI Emerging Markets Index℠ | Class C
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	18.22%	[5]
5 Yrs	rr_AverageAnnualReturnYear05		[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
since inception	rr_AverageAnnualReturnSinceInception	15.61%	[5]
ING Emerging Markets Equity Fund | MSCI Emerging Markets Index℠ | Class I
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	18.22%	[5]
5 Yrs	rr_AverageAnnualReturnYear05		[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
since inception	rr_AverageAnnualReturnSinceInception	15.61%	[5]
ING Emerging Markets Equity Fund | MSCI Emerging Markets Index℠ | Class R
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	18.22%	[5]
5 Yrs	rr_AverageAnnualReturnYear05		[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
since inception	rr_AverageAnnualReturnSinceInception	15.61%	[5]
ING Emerging Markets Equity Fund | MSCI Emerging Markets Index℠ | Class W
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	18.22%	[5]
5 Yrs	rr_AverageAnnualReturnYear05		[5]
10 Yrs	rr_AverageAnnualReturnYear10		[5]
since inception	rr_AverageAnnualReturnSinceInception	15.61%	[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] Total Annual Fund Operating Expenses may be higher than the Fund's ratio of expenses to average net assets shown in the Fund's Financial Highlights, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.

[3] The adviser is contractually obligated to limit expenses to 1.60%, 2.35%, 2.35%, 1.35%, 1.85%, and 1.35% for Class A, Class B, Class C, Class I, Class R, and Class W shares, respectively, through March 1, 2014. The obligation will automatically renew for one-year terms unless it is terminated by the Fund or the adviser upon written notice within 90 days of the end of the current term or upon termination of the advisory agreement and is subject to possible recoupment by the adviser within three years. In addition, the adviser is contractually obligated to further limit expenses of Class I shares to 1.25% through March 1, 2014. There is no guarantee that this obligation will continue after March 1, 2014 and the obligation will only renew if the adviser elects to renew it and is subject to possible recoupment by the adviser within three years. These obligations do not extend to interest, taxes, brokerage commissions, extraordinary expenses, and Acquired Fund Fees and Expenses.

[4] Based on Class A shares' expenses adjusted for class specific differences.

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