Risk Return Summary [Abstract] Institutional Risk Return Summary [Abstract] Prospectus: Prospectus: Document Information, Document [Axis] Document Information, Document [Axis] Document [Domain] Document [Domain] TOUCHSTONE TOTAL RETURN BOND FUND (Prospectus Summary) [Member] TOUCHSTONE TOTAL RETURN BOND FUND (Prospectus Summary) Touchstone Emerging Markets Equity Fund (Prospectus Summary) [Member] TOUCHSTONE EMERGING MARKETS EQUITY FUND (Prospectus Summary) Touchstone Global Equity Fund (Prospectus Summary) [Member] TOUCHSTONE GLOBAL EQUITY FUND SUMMARY (Prospectus Summary) Touchstone Global Real Estate Fund Summary (Prospectus Summary) [Member] TOUCHSTONE GLOBAL REAL ESTATE FUND (Prospectus Summary) Touchstone International Fixed Income Fund (Prospectus Summary) [Member] TOUCHSTONE INTERNATIONAL FIXED INCOME FUND (Prospectus Summary) Touchstone Large Cap Relative Value Fund (Prospectus Summary) [Member] TOUCHSTONE LARGE CAP RELATIVE VALUE FUND (Prospectus Summary) TOUCHSTONE MARKET NEUTRAL EQUITY FUND (Prospectus Summary) TOUCHSTONE MARKET NEUTRAL EQUITY FUND (Prospectus Summary) Touchstone Small Cap Core Fund [Member] TOUCHSTONE SMALL CAP CORE FUND (Prospectus summary) Touchstone Focused Equity Fund Prospectus Summary [Member] TOUCHSTONE FOCUSED EQUITY FUND (Prospectus Summary) Touchstone Mid Cap Fund (Prospectus Summary) [Member] TOUCHSTONE MID CAP FUND (Prospectus Summary) Touchstone Premium Yield Equity Fund (Prospectus Summary) [Member] TOUCHSTONE PREMIUM YIELD EQUITY FUND (Prospectus Summary) Touchstone Sands Capital Select Growth Fund (Prospectus Summary) TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND (Prospectus Summary) Touchstone Short Duration Fixed Income Fund Prospectus Summary [Member] TOUCHSTONE SHORT DURATION FIXED INCOME FUND (Prospectus Summary) Touchstone Small Cap Value Fund (Prospectus Summary) [Member] TOUCHSTONE SMALL CAP VALUE FUND (Prospectus Summary) Touchstone Ultra Short Duration Fixed Income Fund (Prospectus Summary) [Member] TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND (Prospectus Summary) Touchstone Merger Arbitrage Fund (Prospectus Summary) [Member] TOUCHSTONE MERGER ARBITRAGE FUND (Prospectus Summary) Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] S000026604 [Member] TOUCHSTONE TOTAL RETURN BOND FUND S000026595 [Member] TOUCHSTONE EMERGING MARKETS EQUITY FUND S000026602 [Member] TOUCHSTONE GLOBAL EQUITY FUND S000026599 [Member] TOUCHSTONE GLOBAL REAL ESTATE FUND Touchstone International Fixed Income Fund Summary [Member] TOUCHSTONE INTERNATIONAL FIXED INCOME FUND SUMMARY S000026600 [Member] TOUCHSTONE LARGE CAP RELATIVE VALUE FUND S000026603 [Member] TOUCHSTONE MARKET NEUTRAL EQUITY FUND SUMMARY TOUCHSTONE MID CAP VALUE FUND [Member] TOUCHSTONE MID CAP VALUE FUND S000026601 [Member] TOUCHSTONE SMALL CAP CORE FUND S000027231 [Member] TOUCHSTONE FOCUSED EQUITY FUND S000019681 [Member] TOUCHSTONE PREMIUM YIELD EQUITY FUND S000005840 [Member] TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND S000005841 [Member] TOUCHSTONE SHORT DURATION FIXED INCOME FUND S000006456 [Member] TOUCHSTONE SMALL CAP VALUE FUND TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND S000033560 [Member] TOUCHSTONE MERGER ARBITRAGE FUND Share Class [Axis] Share Class [Axis] Share Classes Share Classes C000079919 [Member] Class A C000079919 [Member] C000079920 [Member] Class C C000079920 [Member] C000079921 [Member] Class Y C000079921 [Member] C000079922 [Member] Institutional C000079922 [Member] C000079883 [Member] Class A C000079883 [Member] C000079884 [Member] Class C C000079884 [Member] C000079885 [Member] Class Y C000079885 [Member] C000079886 [Member] Institutional C000079886 [Member] C000079911 [Member] Class A C000079911 [Member] C000079912 [Member] Class C C000079912 [Member] C000079913 [Member] Class Y C000079913 [Member] C000079914 [Member] Institutional C000079914 [Member] C000079899 [Member] Class A C000079899 [Member] C000079900 [Member] Class C C000079900 [Member] C000079901 [Member] Class Y C000079901 [Member] C000079902 [Member] Institutional C000079902 [Member] C000079887 [Member] Class A C000079887 [Member] C000079888 [Member] Class C C000079888 [Member] C000079889 [Member] Class Y C000079889 [Member] C000079890 [Member] Institutional C000079890 [Member] C000079903 [Member] Class A C000079903 [Member] C000079904 [Member] Class C C000079904 [Member] C000079905 [Member] Class Y C000079905 [Member] C000079906 [Member] Institutional C000079906 [Member] C000079915 [Member] Class A C000079915 [Member] C000079916 [Member] Class C C000079916 [Member] C000079917 [Member] Class Y C000079917 [Member] C000079898 [Member] Class A C000079898 [Member] C000079895 [Member] Class C C000079895 [Member] C000079896 [Member] Class Y C000079896 [Member] C000079897 [Member] Institutional C000079897 [Member] C000079907 [Member] Class A C000079907 [Member] C000079908 [Member] Class C C000079908 [Member] C000079909 [Member] Class Y C000079909 [Member] C000079910 [Member] Institutional C000079910 [Member] C000082193 [Member] Class A C000082193 [Member] C000082194 [Member] Class C C000082194 [Member] C000082195 [Member] Class Y C000082195 [Member] C000082196 [Member] Institutional C000082196 [Member] C000048891 [Member] Class A C000048891 [Member] C000048892 [Member] Class C C000048892 [Member] C000016016 [Member] Class Y C000016016 [Member] C000039629 [Member] Class Z C000039629 [Member] C000112484 [Member] Institutional C000112484 [Member] C000055086 [Member] Class A C000055086 [Member] C000055087 [Member] Class C C000055087 [Member] C000067757 [Member] Class Y C000067757 [Member] C000093498 [Member] Class A C000093498 [Member] C000093499 [Member] Class C C000093499 [Member] C000016013 [Member] Class Y C000016013 [Member] C000016014 [Member] Class Z C000016014 [Member] C000076798 [Member] Class Y C000076798 [Member] C000016015 [Member] Class Z C000016015 [Member] C000051266 [Member] Class A Class A C000051267 [Member] Class C Class C Class Y Class Y Class Y C000099304 [Member] Institutional Institutional Class A Class A Class A C000109426 [Member] Class C Class C C000109427 [Member] Class Y Class Y C000017655 [Member] Class Z C000017655 [Member] Institutional Institutional Institutional C000103037 [Member] Class A C000103037 [Member] C000103038 [Member] Class C C000103038 [Member] C000103039 [Member] Class Y C000103039 [Member] C000103040 [Member] Institutional C000103040 [Member] Risk/Return: Risk Return: Document Type Document Type Document Period End Date Document Period End Date Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Document Creation Date Document Creation Date Document Effective Date Document Effective Date Prospectus Date Prospectus Date Trading Symbol Trading Symbol Prospectus [Line Items] Prospectus [Line Items] Risk/Return [Heading] Risk/Return, Heading Objective [Heading] Investment Objective, Heading Objective, Primary [Text Block] Investment Objective, Primary Objective, Secondary [Text Block] Objective, Secondary [Text Block] Expense [Heading] Expense, Heading Expense Narrative [Text Block] Expense, Narrative Shareholder Fees Caption [Text] Shareholder Fees, Caption Shareholder Fees [Table] Shareholder Fees [Table] Operating Expenses Caption [Text] Operating Expenses, Caption Annual Fund Operating Expenses [Table] Annual Fund Operating Expenses [Table] Expense Footnotes [Text Block] Expense Footnotes [Text Block] Expense Example [Heading] Expense Example, Heading Expense Example by Year [Heading] Expense Example by Year [Heading] Expense Example Narrative [Text Block] Expense Example, Narrative Expense Example, With Redemption [Table] Expense Example, With Redemption [Table] Expense Example, No Redemption [Table] Expense Example, No Redemption [Table] Portfolio Turnover [Heading] Portfolio Turnover, Heading Portfolio Turnover [Text Block] Portfolio Turnover Strategy [Heading] Investment Strategy, Heading Strategy Narrative [Text Block] Investment Strategy, Narrative Risk [Heading] Risk, Heading Risk Narrative [Text Block] Risk, Narrative Bar Chart and Performance Table [Heading] Bar Chart and Performance Table, Heading Performance Narrative [Text Block] Performance, Narrative Bar Chart Narrative [Text Block] Bar Chart, Narrative Bar Chart [Heading] Bar Chart, Heading Bar Chart [Table] Bar Chart [Table] Bar Chart Closing [Text Block] Bar Chart, Closing Performance Table Heading Performance Table Heading Performance Table Narrative Performance Table, Narrative Caption Average Annual Returns, Caption Performance [Table] Performance [Table] Market Index Performance [Table] Market Index Performance [Table] Shareholder Fees: Shareholder Fees (fees paid directly from your investment) Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) Maximum Deferred Sales Charge (as a percentage of Offering Price) Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less) Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less) Redemption Fee Wire Redemption Fee Management Fees (as a percentage of Assets) Management Fees Distribution and Service (12b-1) Fees Distribution and/or Service (12b-1) Fees Other Expenses (as a percentage of Assets): Other Expenses Total Other Expenses Acquired Fund Fees and Expenses Acquired Fund Fees and Expenses Acquired Fund Fees and Expenses (AFFE) Expenses (as a percentage of Assets) Total Annual Fund Operating Expenses Fee Waiver or Reimbursement Fee Waivers and/or Expense Reimbursement Fee Waiver and/or Expense Reimbursement Net Expenses (as a percentage of Assets) Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursement Expense Example: Expense Example: Expense Example, With Redemption, 1 Year Expense Example, With Redemption, 1 Year Expense Example, With Redemption, 3 Year Expense Example, With Redemption, 3 Years Expense Example, With Redemption, 5 Year Expense Example, With Redemption, 5 Years Expense Example, With Redemption, 10 Year Expense Example, With Redemption, 10 Years Expense Example, No Redemption: Expense Example, No Redemption: Expense Example, No Redemption, 1 Year Expense Example, No Redemption, 1 Year Expense Example, No Redemption, 3 Years Expense Example, No Redemption, 3 Years Expense Example, No Redemption, 5 Years Expense Example, No Redemption, 5 Years Expense Example, No Redemption, 10 Years Expense Example, No Redemption, 10 Years Bar Chart Table: Bar Chart Table: Annual Return 2003 Annual Return 2003 Annual Return 2004 Annual Return 2004 Annual Return 2005 Annual Return 2005 Annual Return 2006 Annual Return 2006 Annual Return 2007 Annual Return 2007 Annual Return 2008 Annual Return 2008 Annual Return 2009 Annual Return 2009 Annual Return 2010 Annual Return 2010 Annual Return 2011 Annual Return 2011 Annual Return 2012 Annual Return 2012 Performance Measure [Axis] Performance Measure [Axis] Before Taxes Before Taxes After Taxes on Distributions After Taxes on Distributions After Taxes on Distributions After Taxes on Distributions and Sales After Taxes on Distributions and Sale of Fund Shares After Taxes on Distributions and Sales Barclays Capital Aggregate Bond Index [Member] Barclays Capital Aggregate Bond Index Barclays Capital Aggregate Bond Index [Member] Average Annual Return: Average Annual Return: Label Average Annual Returns, Label 1 Year Average Annual Returns, 1 Year 5 Years Average Annual Returns, 5 Years 10 Years Average Annual Returns, 10 Years Fee Waiver or Reimbursement over Assets, Date of Termination Fee Waiver or Reimbursement over Assets, Date of Termination Portfolio Turnover, Rate Portfolio Turnover, Rate Expense Breakpoint Discounts [Text] Expense Breakpoint, Discounts Expense Breakpoint, Minimum Investment Required [Amount] Expense Breakpoint, Minimum Investment Required Amount Expenses Restated to Reflect Current [Text] Expenses Restated to Reflect Current [Text] Risk Lose Money [Text] Risk, Lose Money Performance Information Illustrates Variability of Returns [Text] Performance, Information Illustrates Variability of Returns Performance Availability Phone [Text] Performance, Availability Phone Number Performance Availability Website Address [Text] Performance, Availability Website Address Performance Past Does Not Indicate Future [Text] Performance, Past Does Not Indicate Future Bar Chart Does Not Reflect Sales Loads [Text] Bar Chart, Does Not Reflect Sales Loads Year to Date Return, Label Year to Date Return, Label Bar Chart, Year to Date Return, Date Bar Chart, Year to Date Return, Date Highest Quarterly Return, Label Highest Quarterly Return, Label Highest Quarterly Return, Date Highest Quarterly Return, Date Bar Chart, Year to Date Return Highest Quarterly Return Bar Chart, Year to Date Return Highest Quarterly Return Highest Quarterly Return Lowest Quarterly Return, Label Lowest Quarterly Return, Label Lowest Quarterly Return, Date Lowest Quarterly Return, Date Lowest Quarterly Return Lowest Quarterly Return Index No Deduction for Fees, Expenses, Taxes [Text] Index No Deduction for Fees, Expenses, Taxes Performance Table Uses Highest Federal Rate Performance Table, Uses Highest Federal Rate Performance Table Not Relevant to Tax Deferred Performance Table, Not Relevant to Tax Deferred Performance Table One Class of after Tax Shown [Text] Performance Table, One Class of after Tax Shown Operating Expenses: Operating Expenses: Msci Emerging Markets Index [Member] MSCI Emerging Markets Index Msci Emerging Markets Index [Member] Since Inception Average Annual Returns, Since Inception Inception Date Average Annual Returns, Inception Date Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Expenses, Not Correlated to Ratio Due to Acquired Fund Fees Msci All Country World Index [Member] MSCI All Country World Index Msci All Country World Index [Member] Component1 Other Expenses Other Expenses Component2 Other Expenses Shareholder Services Fees Dividend Expenses on Securities Sold Short Strategy Portfolio Concentration [Text] Investment Strategy, Portfolio Concentration Risk Nondiversified Status [Text] Risk, Nondiversified Status Risk Caption Risk Caption Performance Table Explanation after Tax Higher Performance Table Explanation after Tax Higher Ftse Erpanareit Developed Index [Member] FTSE ERPA/NAREIT Developed Index Ftse Erpanareit Developed Index [Member] S000026596 [Member] TOUCHSTONE INTERNATIONAL FIXED INCOME FUND Citigroup World Government Bond Index Ex U.S. [Member] Citigroup World Government Bond Index ex U.S. Citigroup World Government Bond Index Ex U.S. [Member] Russell 1000 Value Index [Member] Russell 1000 Value Index Russell 1000 Value Index [Member] Touchstone Market Neutral Equity Fund [Member] TOUCHSTONE MARKET NEUTRAL EQUITY FUND (Prospectus Summary) Citigroup 3-Month Treasury Bill Index [Member] Citigroup 3-Month Treasury Bill Index [Member] Citigroup 3-Month Treasury Bill Index [Member] Touchstone Mid Cap Value Fund (Prospectus Summary) TOUCHSTONE MID CAP VALUE FUND (Prospectus Summary) Russell Midcap Value Index [Member] Russell Midcap Value Index Russell Midcap Value Index [Member] Russell 2000 Index [Member] Russell 2000 Index Russell 2000 Index [Member] Russell 3000 Index [Member] Russell 3000 Index Russell 3000 Index [Member] S000005842 [Member] TOUCHSTONE MID CAP FUND Russell 3000 Value Index [Member] Russell 3000 Value Index Russell 3000 Value Index [Member] Dow Jones Us Select Dividend Index [Member] Dow Jones Us Select Dividend Index Dow Jones Us Select Dividend Index [Member] Russell 1000 Growth Index [Member] Russell 1000 Growth Index Russell 1000 Growth Index Barclays Capital 1-3 Year U.S. Treasury Index [Member] Barclays Capital 1-3 Year U.S. Treasury Index Barclays Capital 1-3 Year U.S. Treasury Index [Member] Russell 2000 Value Index [Member] Russell 2000 Value Index Russell 2000 Value Index [Member] Boa Merrill Lynch Three-Month U.S. Treasury Bill Index [Member] Boa Merrill Lynch Three-Month U.S. Treasury Bill Index Boa Merrill Lynch Three-Month U.S. Treasury Bill Index [Member] Boa Merrill Lynch 1-Year Treasury Note Index [Member] Boa Merrill Lynch 1-Year Treasury Note Index Boa Merrill Lynch 1-Year Treasury Note Index [Member] Expenses Deferred Charges [Text Block] Expenses Range of Exchange Fees [Text Block] Expense Example by, Year, Caption [Text] Expense Example, No Redemption Narrative [Text Block] Expense Example, No Redemption, By Year, Caption [Text] Expense Example, No Redemption, By Year, Caption Expense Example Footnotes [Text Block] Expense Example Closing [Text Block] Risk Footnotes [Text Block] Risk Closing [Text Block] Bar Chart Footnotes [Text Block] Performance Table Footnotes Performance Table Closing [Text Block] TOUCHSTONE MID CAP VALUE FUND Annual Return Caption [Text] Caption Annual Return, Inception Date Inception Date Expense Example, By Year, Column [Text] Column Column Expense Example, No Redemption, By Year, Column [Text] Column Shareholder Fees Column [Text] Shareholder Fees (fees paid directly from your investment) Maximum Cumulative Sales Charge (as a percentage) Maximum Cumulative Sales Charge (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage) Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) Redemption Fee (as a percentage of Amount Redeemed) Redemption Fee (as a percentage of Amount Redeemed) Exchange Fee (as a percentage of Amount Redeemed) Exchange Fee Maximum Account Fee (as a percentage of Assets) Maximum Account Fee Shareholder Fee, Other Operating Expenses Column [Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Distribution or Similar (Non 12b-1) Fees Component3 Other Expenses Shareholder Services Fees Expense Exchange Traded Fund Commissions [Text] Expenses Represent Both Master and Feeder [Text] Expenses Explanation of Nonrecurring Account Fee [Text] Other Expenses, New Fund, Based on Estimates [Text] Other Expenses, New Fund, Based on Estimates Expenses Other Expenses Had Extraordinary Expenses Been Included [Text] Acquired Fund Fees and Expenses, Based on Estimates [Text] Risk Money Market Fund [Text] Risk Not Insured Depository Institution [Text] Risk Column [Text] Risk [Text] Performance One Year or Less [Text] Performance Additional Market Index [Text] Annual Return, Column [Text] Column Annual Return 2001 Annual Return 2000 Annual Return 2002 Annual Return 2013 Annual Return 2017 Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text] Bar Chart, Returns for Class Not Offered in Prospectus [Text] Performance Table Market Index Changed Performance Table Does Reflect Sales Loads Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text] Column Money Market Seven Day Yield, Caption [Text] Money Market Seven Day Yield Column [Text] Money Market Seven Day Yield Phone Money Market Seven Day Yield Money Market Seven Day Tax Equivalent Yield Thirty Day Yield Caption Thirty Day Yield Column [Text] Thirty Day Yield Phone Thirty Day Yield Thirty Day Tax Equivalent Yield Russell Midcap Index [Member] Russell Midcap Index