Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	ING MUTUAL FUNDS
Prospectus Date	rr_ProspectusDate	Feb. 28, 2014
ING Multi-Manager International Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	ING Multi-Manager International Equity Fund (formerly, ING International Growth Fund)
Objective [Heading]	rr_ObjectiveHeading	INVESTMENT OBJECTIVE
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund seeks long-term growth of capital.
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.
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, 2015
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 Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 48% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	48.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	Expense Example $
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The Example is intended to help you compare the cost of investing in shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example show costs if you sold (redeemed) your shares at the end of the period or continued to hold them. The Examples also assumes 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 Example reflects 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. The Fund will provide shareholders with at least 60 days’ prior notice of any change in this investment policy. The Fund invests at least 65% of its assets in equity securities of companies organized under the laws of, or with principal offices located in, a number of different countries outside of the United States, including companies in countries in emerging markets. The Fund does not focus its investments in a particular industry or country. The Fund may invest in companies of any market capitalization. The equity securities in which the Fund may invest include, but are not limited to, common stocks, preferred stocks, depositary receipts, rights and warrants to buy common stocks, and privately placed securities. The Fund may invest in derivative instruments including options, futures, and forward foreign currency exchange contracts. The Fund may typically use derivatives to seek to reduce exposure to other risks, such as interest rate or currency risk, to substitute for taking a position in the underlying assets, for cash management, and/or to seek to enhance returns in the Fund. The Fund invests its assets in foreign investments which are denominated in U.S. dollars, major reserve currencies and currencies of other countries and can be affected by fluctuations in exchange rates. To attempt to protect against adverse changes in currency exchange rates, the Fund may, but will not necessarily use special techniques such as forward foreign currency exchange contracts. 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”). Baillie Gifford Overseas Limited (“Baillie Gifford”), J.P. Morgan Investment Management Inc. (“JPMorgan”), Lazard Asset Management LLC (“Lazard”), and T. Rowe Price Associates, Inc. (“T. Rowe Price”) (each a “Sub-Adviser” and collectively “Sub-Advisers”) provide day-to-day management of the Fund. The Sub-Advisers act independently of each other and use their own methodologies for selecting investments. 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 33 1∕3% of its total assets. Baillie Gifford Overseas Limited In selecting investments for the Fund, Baillie Gifford normally takes into account the industry and country allocations in the MSCI EAFE® Index. A significant part of the assets will normally be divided among continental Europe, the United Kingdom, and Asia (including Australia and New Zealand). Country allocation, however, is driven by stock selection. Baillie Gifford invests in companies that it believes are well-managed, quality businesses that enjoy sustainable, competitive advantages in their marketplace. Baillie Gifford's investment style primarily uses a bottom-up, stock-driven approach, with the objective of selecting stocks that it believes can sustain an above-average growth rate, which is not reflected in the share price. Companies are screened for quality first; valuation is a secondary consideration. Baillie Gifford looks for companies that it believes have attractive industry backgrounds, strong competitive positions within those industries, high-quality earnings, and a positive approach toward shareholders. The main fundamental factors that Baillie Gifford considers in this bottom-up analysis include earnings growth, cash flow growth, profitability, capital structure, and valuation. J.P. Morgan Investment Management Inc. In choosing securities, JPMorgan seeks to provide high total return by investing primarily in equity securities from developed countries included in the MSCI EAFE® Value Index while emphasizing securities that are ranked as undervalued according to its proprietary research while underweighting or avoiding those that appear over-valued. JPMorgan employs a process that combines fundamental research for identifying portfolio securities and currency management decisions. Various models are used to quantify JPMorgan’s fundamental stock research, producing a ranking of companies in each industry group according to their relative value. JPMorgan then buys and sells securities, using the research and valuation rankings as well as its assessment of other factors, including: (i) value characteristics such as low price-to-book and price-to-earnings ratios; (ii) catalysts that could trigger a change in a stock’s price; (iii) potential reward compared to potential risk; and (iv) temporary mispricings caused by market overreactions. Lazard Asset Management LLC In choosing securities, Lazard normally invests in large non-U.S. companies with market capitalizations in the range of companies included in the MSCI EAFE® Index that Lazard believes are undervalued based on their earnings, cash flow or asset values. Lazard looks for established companies in economically developed countries and may invest in securities of companies whose principal business activities are located in emerging market countries. T. Rowe Price Associates, Inc. While T. Rowe Price invests with an awareness of the global economic backdrop and the outlook for industry sectors and individual countries, bottom-up stock selection is the focus of T. Rowe Price's decision making. Country allocation is driven largely by stock selection, though we may limit investments in markets that appear to have poor overall prospects. Securities selection reflects a growth style. T. Rowe Price relies on a global team of investment analysts dedicated to in-depth fundamental research in an effort to identify companies it believes are capable of achieving and sustaining above-average, long-term earnings growth. T. Rowe Price seeks to purchase stocks of such companies at reasonable prices in relation to present or anticipated earnings, cash flow, or book value. In selecting investments, T. Rowe Price generally favors companies that it believes have one or more of the following characteristics: leading or improving market position; attractive business niche; attractive or improving franchise or industry position; seasoned management; stable or improving earnings and/or cash flow; and sound or improving balance sheet. T. Rowe Price typically focuses investments in large-sized, and to a lesser extent, medium-sized, companies.
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. 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. 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. Derivatives may not perform as expected, so the Fund may not realize the intended benefits. When used for hedging, the change in value of a derivative may not correlate as expected with the currency, security or other risk being hedged. In addition, given their complexity, derivatives expose the Fund to the risk of improper valuation. 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. 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. 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. 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. 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 I shares. Other class shares' performance would be lower than Class I shares' performance because of lower expenses paid by Class I 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.
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.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 I (as of December 31 of each year)
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Best quarter: 1st, 2012, 13.75% and Worst quarter: 2nd, 2012, -6.76%
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns% (for the periods ended December 31, 2013)
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.
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 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.
ING Multi-Manager International 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 Fees	rr_ManagementFeesOverAssets	0.75%
Distribution and/or Shareholder Services (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Administrative Services Fees	rr_Component1OtherExpensesOverAssets	0.10%
Other Expenses	rr_OtherExpensesOverAssets	0.13%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.98%
Waivers, Reimbursements and Recoupments	rr_FeeWaiverOrReimbursementOverAssets	none	[1]
Total Annual Fund Operating Expenses after Waivers and Reimbursements	rr_NetExpensesOverAssets	0.98%
1 Yr	rr_ExpenseExampleYear01	$ 100
3 Yrs	rr_ExpenseExampleYear03	312
5 Yrs	rr_ExpenseExampleYear05	542
10 Yrs	rr_ExpenseExampleYear10	1,201
1 Yr	rr_ExpenseExampleNoRedemptionYear01	100
3 Yrs	rr_ExpenseExampleNoRedemptionYear03	312
5 Yrs	rr_ExpenseExampleNoRedemptionYear05	542
10 Yrs	rr_ExpenseExampleNoRedemptionYear10	$ 1,201
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	20.37%
2013	rr_AnnualReturn2013	19.80%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2012
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	13.75%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2012
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(6.76%)
1 Yr	rr_AverageAnnualReturnYear01	19.80%	[2]
5 Yrs	rr_AverageAnnualReturnYear05		[2]
10 Yrs	rr_AverageAnnualReturnYear10		[2]
Since Inception	rr_AverageAnnualReturnSinceInception	8.18%	[2]
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 06, 2011	[2]
ING Multi-Manager International Equity Fund | After tax on distributions | Class I
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	19.51%	[2]
5 Yrs	rr_AverageAnnualReturnYear05		[2]
10 Yrs	rr_AverageAnnualReturnYear10		[2]
Since Inception	rr_AverageAnnualReturnSinceInception	7.95%	[2]
ING Multi-Manager International Equity Fund | After tax on distributions with sale | Class I
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	11.50%	[2]
5 Yrs	rr_AverageAnnualReturnYear05		[2]
10 Yrs	rr_AverageAnnualReturnYear10		[2]
Since Inception	rr_AverageAnnualReturnSinceInception	6.46%	[2]
ING Multi-Manager International Equity Fund | MSCI EAFE® Index
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	22.78%	[2],[3]
5 Yrs	rr_AverageAnnualReturnYear05		[2],[3]
10 Yrs	rr_AverageAnnualReturnYear10		[2],[3]
Since Inception	rr_AverageAnnualReturnSinceInception	8.42%	[2],[3]
ING Multi-Manager International Equity Fund | MSCI ACW Index℠ Ex-U.S.
Risk/Return:	rr_RiskReturnAbstract
1 Yr	rr_AverageAnnualReturnYear01	15.29%	[2],[3]
5 Yrs	rr_AverageAnnualReturnYear05		[2],[3]
10 Yrs	rr_AverageAnnualReturnYear10		[2],[3]
Since Inception	rr_AverageAnnualReturnSinceInception	5.32%	[2],[3]

[1] The adviser is contractually obligated to limit expenses to 0.99% for Class I shares, through March 1, 2015; the obligation does not extend to interest, taxes, brokerage commissions, extraordinary expenses, and Acquired Fund Fees and Expenses. The obligation will automatically renew for one-year terms unless: (i) the adviser provides 90 days written notice of its termination and such termination is approved by the Fund's board; or (ii) the management agreement has been terminated. The obligation is subject to possible recoupment by the adviser within 36 months of the waiver or reimbursement. In addition, the adviser is contractually obligated to waive a portion of the management fee through March 1, 2015. Based upon net assets as of October 31, 2013, the management fee waiver for the Fund would be (0.01)%. There is no guarantee that the management fee waiver will continue after March 1, 2015. The management fee waiver will continue if the adviser elects to renew it. Notwithstanding the foregoing, termination or modification of this obligation requires approval by the Fund's board.

[2] Prior to July 1, 2013 the Fund had different sub-advisers and principal investment strategies.

[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.