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Label Element Value
Prospectus: rr_ProspectusTable  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Jan. 30, 2020
Entity Registrant Name dei_EntityRegistrantName TOUCHSTONE FUNDS GROUP TRUST
Central Index Key dei_EntityCentralIndexKey 0000914243
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jan. 28, 2020
Document Effective Date dei_DocumentEffectiveDate Jan. 28, 2020
Prospectus Date rr_ProspectusDate Jan. 30, 2020
Touchstone Active Bond Fund  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE ACTIVE BOND FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Active Bond Fund (the “Fund”) seeks to provide as high a level of current income as is consistent with the preservation of capital.  Capital appreciation is a secondary goal.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 235% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 235.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, the Fund invests at least 80% of its assets in bonds. This is a non-fundamental investment policy that the Fund can change upon 60 days’ prior notice to shareholders. Bonds include mortgage-related securities, asset-backed securities, government securities (both U.S. government securities and foreign sovereign debt), and corporate debt securities. The Fund may engage in frequent and active trading as part of its principal investment strategies.
 
In deciding what securities to buy and sell for the Fund, the Fund’s sub-advisor, Fort Washington Investment Advisors, Inc. (“Fort Washington”), analyzes the overall investment opportunities and risks in different sectors of the debt securities markets by focusing on maximizing total return while reducing volatility of the Fund’s portfolio.  Fort Washington follows a disciplined sector allocation process in order to build a diversified portfolio of investments.
 
In building the Fund’s portfolio, Fort Washington primarily invests in investment-grade debt securities, but may invest up to 30% of the Fund's total assets in non-investment-grade debt securities rated as low as B by a Nationally Recognized Statistical Rating Organization (“NRSRO”).  Non-investment-grade debt securities are often referred to as “junk bonds” and are considered speculative. The Fund's investment policies are based on credit ratings at the time of purchase. The Fund may also invest up to 20% of its total assets in foreign-issued debt securities denominated in either the U.S. dollar or a foreign currency.  Foreign-issued debt securities may include debt securities of emerging market countries.

Additionally, in order to implement its investment strategy, the Fund may invest in mortgage dollar-roll transactions and reverse repurchase agreements, and in derivatives, including forwards, futures contracts, interest rate and credit default swap agreements, and options. These investments may be used to gain or hedge market exposure, to adjust the Fund’s duration, to manage interest rate risk, and for any other purposes consistent with the Fund’s investment strategies and limitations.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Fixed-Income Risk: The market value of the Fund’s fixed-income securities responds to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and increase in value if interest rates fall. Normally, the longer the maturity or duration of the fixed-income securities the Fund owns, the more sensitive the value of the Fund’s shares will be to changes in interest rates.

•
Asset-Backed Securities Risk: Asset-backed securities are fixed-income securities backed by other assets such as credit card, automobile or consumer loan receivables, retail installment loans, or participations in pools of leases. The values of these securities are sensitive to changes in the credit quality of the underlying collateral, the credit strength of any credit enhancement feature, changes in interest rates, and, at times, the financial condition of the issuer.

•
Credit Risk: The fixed-income securities in the Fund’s portfolio are subject to the possibility that a deterioration, whether sudden or gradual, in the financial condition of an issuer, or a deterioration in general economic conditions, could cause an issuer to fail to make timely payments of principal or interest, when due. This may cause the issuer’s securities to decline in value.

•
Interest Rate Risk: In general, when interest rates rise, the prices of debt securities fall, and when interest rates fall, the prices of debt securities rise. The price volatility of a debt security also depends on its maturity. Longer-term securities are generally more volatile, so the longer the average maturity or duration of these securities, the greater their price risk. Recent and potential future changes in government policy may affect interest rates.

•
Investment-Grade Debt Securities Risk: Investment-grade debt securities may be downgraded by a NRSRO to below-investment-grade status, which would increase the risk of holding these securities. Investment-grade debt securities rated in the lowest rating category by a NRSRO involve a higher degree of risk than fixed-income securities with higher credit ratings.

•
Mortgage-Backed Securities Risk:  Mortgage-backed securities are fixed-income securities representing an interest in a pool of underlying mortgage loans. Mortgage-backed securities are sensitive to changes in interest rates, but may respond to these changes differently from other fixed-income securities due to the possibility of prepayment of the underlying mortgage loans. Mortgage-backed securities may fluctuate in price based on deterioration in the value of the collateral underlying the pool of mortgage loans, which may result in the collateral being worth less than the remaining principal amount owed on the mortgages in the pool.

•
Non-Investment-Grade Debt Securities Risk: Non-investment-grade debt securities are sometimes referred to as “junk bonds” and are considered speculative with respect to their issuers’ ability to make payments of interest and principal. There is a high risk that the Fund could suffer a loss from investments in non-investment-grade debt securities caused by the default of an issuer of such securities. Non-investment-grade debt securities may also be less liquid than investment-grade debt securities.

Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Derivatives Risk: The use of derivatives may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives. Risks associated with derivatives may include the risk that the derivative does not correlate well with the security, index, or currency to which it relates, the risk that the Fund will be unable to sell or close out the derivative due to an illiquid market, the risk that the counterparty may be unwilling or unable to meet its obligations, and the risk that the derivative could expose the Fund to the risk of magnified losses resulting from leverage. These additional risks could cause the Fund to experience losses to which it would otherwise not be subject.

•
Forward Foreign Currency Exchange Contract Risk: A forward foreign currency exchange contract is an agreement to buy or sell a specific currency at a future date and at a price set at the time of the contract. Forward foreign currency exchange contracts may reduce the risk of loss from a change in value of a currency, but they also limit any potential gains and do not protect against fluctuations in the value of the underlying position.

•
Futures Contracts Risk: The risks associated with the Fund’s futures positions include liquidity and counterparty risks associated with derivative instruments.

•
Options Risk: Options trading is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The value of options can be highly volatile, and their use can result in loss if the sub-advisor is incorrect in its expectation of price fluctuations. Options, whether exchange traded or over-the-counter, may also be illiquid.

•
Swap Agreement Risk: Swap agreements (“swaps”) are individually negotiated and structured to include exposure to a variety of different types of investments or market factors. Swaps may increase or decrease the overall volatility of the investments of the Fund and its share price. The performance of swaps may be affected by a change in the specific interest rate, currency, or other factors that determine the amounts of payments due to and from the Fund. A swap can be a form of leverage, which can magnify the Fund’s gains or losses.

Foreign Securities Risk: Investing in foreign securities poses additional risks since political and economic events unique in a country or region will affect those markets and their issuers, while such events may not necessarily affect the U.S. economy or issuers located in the United States. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund's investments. There are also risks associated with foreign accounting standards, government regulation, market information, and clearance and settlement procedures. Foreign markets may be less liquid and more volatile than U.S. markets and offer less protection to investors.

•
Emerging Markets Risk: Emerging markets may be more likely to experience political turmoil or rapid changes in market or economic conditions than more developed countries. In addition, the financial stability of issuers (including governments) in emerging market countries may be more precarious than that of issuers in other countries.
 
•
Sovereign Debt Risk: The actions of foreign governments concerning their respective economies could have an important effect on their ability or willingness to service their sovereign debt. Such actions could have significant effects on market conditions and on the prices of securities and instruments held by the Fund, including the securities and instruments of foreign private issuers.
 
Leverage Risk: Leverage occurs when the Fund uses borrowings, derivatives (such as futures or options), or similar instruments or techniques to gain exposure to investments in an amount that exceeds the Fund's initial investment. The use of leverage magnifies changes in the Fund's net asset value and thus may result in increased portfolio volatility and increased risk of loss. Leverage can create an interest expense that may lower the Fund’s overall returns. There can be no guarantee that a leveraging strategy will be successful.
 
Mortgage Dollar Roll Risk: Mortgage “dollar rolls” are transactions in which mortgage-backed securities are sold for delivery in the current month and the seller simultaneously contracts to repurchase substantially similar securities on a specified future date. If the broker-dealer to whom the Fund sells the security becomes insolvent, the Fund’s right to repurchase the security may be restricted. Other risks involved in entering into mortgage dollar rolls include the risk that the value of the security may change adversely over the term of the mortgage dollar roll and that the security the Fund is required to repurchase may be worth less than the security that the Fund held.

Portfolio Turnover Risk: Frequent and active trading may result in greater expenses to the Fund, which may lower the Fund's performance and may result in the realization of substantial capital gains, including net short-term capital gains. As a result, high portfolio turnover may reduce the Fund's returns.
 
U.S. Government Agencies Securities Risk: Certain U.S. government agency securities are backed by the right of the issuer to borrow from the U.S. Treasury while others are supported only by the credit of the issuer or instrumentality.  While the U.S. government is able to provide financial support to U.S. government-sponsored agencies or instrumentalities, no assurance can be given that it will always do so. 
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
On January 27, 2017, the Touchstone Active Bond Fund, previously a series of Touchstone Investment Trust (the "Predecessor Fund"), was reorganized into the Fund. As a result of the reorganization, the performance and accounting history of the Predecessor Fund was assumed by the Fund.  Financial and performance information prior to January 27, 2017 is that of the Predecessor Fund.

The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Bloomberg Barclays U.S. Aggregate Bond Index.  The bar chart does not reflect any sales charges, which would reduce your return. The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Bloomberg Barclays U.S. Aggregate Bond Index. 
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Active Bond Fund — Class A Shares Total Returns as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: First Quarter 2019 3.89%
 
Worst Quarter: Second Quarter 2013 (2.18)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.

The inception date of Class Y shares and Institutional Class shares of the Fund was April 12, 2012. Class Y and Institutional Class shares' performance information was calculated using the historical performance of Class A shares for the periods prior to April 12, 2012. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Class Y and Institutional Class shares.
Touchstone Active Bond Fund | Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 8.72%
5 Years rr_AverageAnnualReturnYear05 3.05%
10 Years rr_AverageAnnualReturnYear10 3.75%
Touchstone Active Bond Fund | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TOBAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.39%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.36%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.00%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.90% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 290
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 502
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 732
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,391
Annual Return 2010 rr_AnnualReturn2010 7.72%
Annual Return 2011 rr_AnnualReturn2011 8.17%
Annual Return 2012 rr_AnnualReturn2012 5.75%
Annual Return 2013 rr_AnnualReturn2013 (0.61%)
Annual Return 2014 rr_AnnualReturn2014 4.25%
Annual Return 2015 rr_AnnualReturn2015 (0.80%)
Annual Return 2016 rr_AnnualReturn2016 5.12%
Annual Return 2017 rr_AnnualReturn2017 3.50%
Annual Return 2018 rr_AnnualReturn2018 (1.93%)
Annual Return 2019 rr_AnnualReturn2019 10.11%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.89%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2013
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.18%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 7.94%
5 Years rr_AverageAnnualReturnYear05 2.11%
10 Years rr_AverageAnnualReturnYear10 3.55%
Touchstone Active Bond Fund | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 6.79%
5 Years rr_AverageAnnualReturnYear05 0.98%
10 Years rr_AverageAnnualReturnYear10 2.25%
Touchstone Active Bond Fund | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 4.68%
5 Years rr_AverageAnnualReturnYear05 1.09%
10 Years rr_AverageAnnualReturnYear10 2.18%
Touchstone Active Bond Fund | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TODCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.39%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.46%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.85%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.20%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.65% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 268
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 562
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 982
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,153
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 168
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 562
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 982
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,153
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 8.30%
5 Years rr_AverageAnnualReturnYear05 2.34%
10 Years rr_AverageAnnualReturnYear10 3.27%
Touchstone Active Bond Fund | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TOBYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.39%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.34%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.73%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.65% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 66
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 225
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 398
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 899
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 10.50%
5 Years rr_AverageAnnualReturnYear05 3.39%
10 Years rr_AverageAnnualReturnYear10 4.27%
Touchstone Active Bond Fund | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TOBIX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.39%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.27%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.66%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.57% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 58
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 202
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 359
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 814
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 10.59%
5 Years rr_AverageAnnualReturnYear05 3.48%
10 Years rr_AverageAnnualReturnYear10 4.33%
Touchstone Anti-Benchmark International Core Equity Fund Series  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE ANTI-BENCHMARK® INTERNATIONAL CORE EQUITY FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Anti-Benchmark® International Core Equity Fund (the “Fund”) seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover.
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance. During the period from commencement of operations (November 19, 2018) through September 30, 2019, the Fund's portfolio turnover rate was 117% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 117.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal market conditions, at least 80% of its assets in equity securities of non-U.S. issuers. The Fund’s 80% policy is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders. The Fund pursues its objective by seeking to track the net total return, before fees and expenses, of the TOBAM Anti–Benchmark® International Core Equity Index (the "Index"). The Index is a proprietary rules–based index created by the Fund's sub–advisor, TOBAM S.A.S. ("TOBAM"), which is designed to create a more diversified portfolio of equity securities of non-U.S. issuers relative to traditional market capitalization weighted benchmarks. The Fund intends to fully replicate the Index to achieve its investment objective, meaning the Fund will generally invest in all of the component securities of the Index in the same approximate proportions as the Index.

The equity securities that comprise the Index primarily include common and preferred stock of non-U.S. companies that trade on foreign exchanges. TOBAM may replace the common or preferred stock of a foreign issuer with a depositary receipt when it deems the depositary receipt to be more liquid than the corresponding stock. In determining whether a company is foreign, TOBAM primarily looks to both the country of incorporation and the main listing country. If both of these countries are non-U.S., the company is considered non-U.S. for purposes of inclusion in the Index. The Index is comprised of securities of issuers located in developed markets. TOBAM considers the following countries to be developed markets for these purposes: Australia, Austria, Belgium, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, Luxembourg, Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland, and the United Kingdom.

The Index is based on TOBAM's proprietary quantitative model, which selects and weights companies to maximize diversification. TOBAM quantitatively selects securities, subject to certain constraints, that maximize the portfolio's patented Diversification Ratio®, a proprietary mathematical metric based on the volatility of each Index constituent and its correlation to the other Index constituents. Such constraints include a minimum and maximum weight for any given stock, as well as geographic and country constraints. TOBAM's Anti-Benchmark® strategy seeks to avoid the concentration risk that exists in traditional market capitalization-weighted indices through its quantitative approach to diversification.

The Index typically is reconstituted (i.e., Index constituents are added or deleted and weights are reset) monthly. The Fund is rebalanced following the same schedule as the Index. The Fund may engage in frequent and active trading as part of its principal investment strategies.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.
 
Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.

•
Preferred Stock Risk: In the event an issuer is liquidated or declares bankruptcy, the claims of owners of bonds take precedence over the claims of those who own preferred and common stock. If interest rates rise, the fixed dividend on preferred stocks may be less attractive, causing the price of preferred stocks to decline.

Foreign Securities Risk: Investing in foreign securities poses additional risks since political and economic events unique in a country or region will affect those markets and their issuers, while such events may not necessarily affect the U.S. economy or issuers located in the United States. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund's investments. There are also risks associated with foreign accounting standards, government regulation, market information, and clearance and settlement procedures. Foreign markets may be less liquid and more volatile than U.S. markets and offer less protection to investors.

•
Depositary Receipts Risk: Foreign receipts, which include American Depositary Receipts, Global Depositary Receipts, and European Depositary Receipts, are securities that evidence ownership interests in a security or a pool of securities issued by a foreign issuer. The risks of depositary receipts include many risks associated with investing directly in foreign securities.

Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Passive Investment Risk: As the Fund is intended to track the Index, portfolio managers do not attempt to take defensive positions under any market conditions, including during declining markets. As a result, the Fund's performance may be adversely affected by a general decline in the market segments relating to its Index.

Quantitative Strategy Risk:  TOBAM uses proprietary statistical analyses and models to construct the Index, which the Fund seeks to track.  A securities portfolio selected using TOBAM’s proprietary models can perform differently than the market as a whole as a result of the correlation factors used in the analysis to construct the models, the weight placed on each factor, and changes in the factors' historical trends. As a result, the Fund may be more or less exposed to a risk factor than its individual holdings. Quantitative models are subject to technical issues including programming and data inaccuracies, are based on assumptions, and rely on data that is subject to limitations (e.g., inaccuracies, staleness), any of which could adversely affect their effectiveness or predictive value.

Tracking Error Risk: As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index.

Portfolio Turnover Risk: Frequent and active trading may result in greater expenses to the Fund, which may lower the Fund's performance and may result in the realization of substantial capital gains, including net short-term capital gains. As a result, high portfolio turnover may reduce the Fund's returns.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund's average annual total returns for one year and since inception compare with the MSCI EAFE Index. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund's average annual total returns for one year and since inception compare with the MSCI EAFE Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Anti-Benchmark® International Core Equity Fund — Class Y Shares Total Returns as of December 31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: Fourth Quarter 2019 7.04%
 
Worst Quarter: Second Quarter 2019 0.00%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class Y shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class Y shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class Y shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class Y shares' after-tax returns.
Touchstone Anti-Benchmark International Core Equity Fund Series | MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel MSCI EAFE Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 22.01%
Since Inception rr_AverageAnnualReturnSinceInception 14.16%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 18, 2018
Touchstone Anti-Benchmark International Core Equity Fund Series | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TYBAX
Redemption Fee rr_RedemptionFee $ (15) [3]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.45%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 373.52%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 373.97%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (373.28%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.69% [4]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 70
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 19,575
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 19,575
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 19,575
Annual Return 2019 rr_AnnualReturn2019 14.93%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.04%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter: 
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2019
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn none
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 14.93%
Since Inception rr_AverageAnnualReturnSinceInception 8.29%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 18, 2018
Touchstone Anti-Benchmark International Core Equity Fund Series | Class Y | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Y Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 14.50%
Since Inception rr_AverageAnnualReturnSinceInception 7.91%
Touchstone Anti-Benchmark International Core Equity Fund Series | Class Y | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Y Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 9.40%
Since Inception rr_AverageAnnualReturnSinceInception 6.45%
Touchstone Anti-Benchmark International Core Equity Fund Series | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TIABX
Redemption Fee rr_RedemptionFee $ (15) [3]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.45%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.68%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.13%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.54%) [4]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.59% [4]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 60
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 305
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 570
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,326
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 14.99%
Since Inception rr_AverageAnnualReturnSinceInception 8.36%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 18, 2018
Touchstone Anti-Benchmark US Core Equity Fund Series  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE ANTI-BENCHMARK® US CORE EQUITY FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Anti-Benchmark® US Core Equity Fund (the “Fund”) seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance. During the period from commencement of operations (November 19, 2018) through September 30, 2019, the Fund's portfolio turnover rate was 137% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 137.00%
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal market conditions, at least 80% of its assets in U.S. equity securities. The Fund’s 80% policy is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders. The Fund pursues its objective by seeking to track the total return, before fees and expenses, of the TOBAM Anti–Benchmark® US Core Equity Index (the "Index"). The Index is a proprietary rules–based index created by the Fund's sub–advisor, TOBAM S.A.S. ("TOBAM"), that is designed to create a more diversified equity portfolio of U.S. equity securities relative to traditional market capitalization weighted benchmarks. The Fund intends to fully replicate the Index to achieve its investment objective, meaning the Fund will generally invest in all of the component securities of the Index in the same approximate proportions as the Index.

The equity securities that comprise the Index include common stock and preferred stock. These securities may be listed on an exchange or traded over-the-counter.

The Index is based on TOBAM's proprietary quantitative model, which selects and weights companies to maximize diversification. TOBAM quantitatively selects securities, subject to certain constraints, that maximize the portfolio's patented Diversification Ratio®, a proprietary mathematical metric based on the volatility of each Index constituent and its correlation to the other Index constituents. Such constraints include a minimum and maximum weight for any given stock. TOBAM's Anti-Benchmark® strategy seeks to avoid the concentration risk that exists in traditional market capitalization-weighted indices through its quantitative approach to diversification.

The Index typically is reconstituted (i.e., Index constituents are added or deleted and weights are reset) monthly. The Fund will be rebalanced following the same schedule as the Index. The Fund may engage in frequent and active trading as part of its principal investment strategies.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.
 
Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.
 
•
Preferred Stock Risk: In the event an issuer is liquidated or declares bankruptcy, the claims of owners of bonds take precedence over the claims of those who own preferred and common stock. If interest rates rise, the fixed dividend on preferred stocks may be less attractive, causing the price of preferred stocks to decline.
 
Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Passive Investment Risk: As the Fund is intended to track the Index, portfolio managers do not attempt to take defensive positions under any market conditions, including during declining markets. As a result, the Fund's performance may be adversely affected by a general decline in the market segments relating to its Index.

Quantitative Strategy Risk:  TOBAM uses proprietary statistical analyses and models to construct the Index, which the Fund seeks to track.  A securities portfolio selected using TOBAM’s proprietary models can perform differently than the market as a whole as a result of the correlation factors used in the analysis to construct the models, the weight placed on each factor, and changes in the factors' historical trends. As a result, the Fund may be more or less exposed to a risk factor, such as sector risk, than its individual holdings. Quantitative models are subject to technical issues including programming and data inaccuracies, are based on assumptions, and rely on data that is subject to limitations (e.g., inaccuracies, staleness), any of which could adversely affect their effectiveness or predictive value.

Tracking Error Risk: As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index.

Portfolio Turnover Risk: Frequent and active trading may result in greater expenses to the Fund, which may lower the Fund's performance and may result in the realization of substantial capital gains, including net short-term capital gains. As a result, high portfolio turnover may reduce the Fund's returns.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund's average annual total returns for one year and since inception compare with the Russell 1000® Index. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund's average annual total returns for one year and since inception compare with the Russell 1000® Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Anti-Benchmark® US Core Equity Fund — Class Y Shares Total Returns as of December 31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: First Quarter 2019 10.99%
 
Worst Quarter: Third Quarter 2019 0.95%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class Y shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class Y shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class Y shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class Y shares' after-tax returns.
Touchstone Anti-Benchmark US Core Equity Fund Series | Russell 1000® Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell 1000® Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 31.43%
Since Inception rr_AverageAnnualReturnSinceInception 18.31%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 18, 2018
Touchstone Anti-Benchmark US Core Equity Fund Series | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TABYX
Redemption Fee rr_RedemptionFee $ (15) [5]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.35%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 110.54%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 110.89%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (110.35%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.54% [6]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 55
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 5,847
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 5,847
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 5,847
Annual Return 2019 rr_AnnualReturn2019 25.91%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 10.99%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2019
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn 0.95%
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 25.91%
Since Inception rr_AverageAnnualReturnSinceInception 13.59%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 18, 2018
Touchstone Anti-Benchmark US Core Equity Fund Series | Class Y | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Y Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 25.42%
Since Inception rr_AverageAnnualReturnSinceInception 12.98%
Touchstone Anti-Benchmark US Core Equity Fund Series | Class Y | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Y Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 15.65%
Since Inception rr_AverageAnnualReturnSinceInception 10.27%
Touchstone Anti-Benchmark US Core Equity Fund Series | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TABOX
Redemption Fee rr_RedemptionFee $ (15) [5]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.35%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.50%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.85%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.41%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.44% [6]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 45
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 230
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 431
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,011
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 25.96%
Since Inception rr_AverageAnnualReturnSinceInception 13.64%
Inception Date rr_AverageAnnualReturnInceptionDate Nov. 18, 2018
Touchstone Credit Opportunities II Fund  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE CREDIT OPPORTUNITIES II FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Credit Opportunities II Fund (the “Fund”) (formerly known as the Touchstone Credit Opportunities Fund) seeks absolute total return, primarily from income and capital appreciation.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below. 
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the 3-month period ended September 30, 2019, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio. The Fund changed its fiscal year end from June 30 to September 30. During the previous fiscal year ended June 30, 2019, the Fund's portfolio turnover rate was 94% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 94.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts   You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Assuming No Redemption
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal circumstances, at least 80% of its assets (including the amount of borrowings for investment purposes) in U.S. and non-U.S. debt instruments.
 
The Fund seeks to achieve its investment goal by investing in a wide array of debt securities or other debt instruments. The Fund may invest in debt instruments of any credit quality or rating and may invest without limit in loans, bonds and other debt instruments that are rated below investment grade by one or more nationally recognized statistical ratings organizations (“NRSRO”) (i.e., rated Ba or lower by Moody’s Investors Service, Inc. (“Moody’s”) or BB or lower by Standard & Poor’s Ratings Services (“S&P”)) or, if unrated, deemed by the Fund’s sub-advisor, Ares Capital Management II, LLC (“Ares”), to be of comparable quality.  These investments may include distressed or defaulted debt instruments.  Securities rated below investment grade are sometimes referred to as “high yield” or “junk” bonds. The Fund's investment policies are based on credit ratings at the time of purchase.
 
In managing the Fund’s portfolio, Ares seeks to take advantage of opportunities presented from time to time in credit markets by systematically allocating and reallocating the Fund’s assets among core investments and opportunistic investments as credit market conditions change.
 
The Fund’s core investments include the following:
 
•
Opportunistic Liquid Credit—The Fund seeks to generate current income with attractive relative value by investing in senior secured and unsecured debt of U.S. and non-U.S. companies.
•
Structured Credit—The Fund seeks to generate current income and capital appreciation by investing in debt and equity securities of collateralized loan obligations in the U.S. and globally.
•
Special Situations—The Fund seeks capital appreciation by investing in distressed U.S. and non-U.S. corporate loans and bonds that trade at significant discounts to par value.
•
Hedges—The Fund engages in short selling, futures contracts, total return and interest rate swaps, pairs trades and options transactions in an attempt to achieve downside protection and reduce portfolio volatility. The Fund’s hedging strategies may include, among other things, entering into synthetic credit index short positions, single security short selling, pairs trades, futures contracts, total return and interest rate swaps, and certain options transactions.
 
The Fund may also invest in securities that may be offered and sold to only qualified institutional buyers under Rule 144A of the Securities Act of 1933, as amended (the "1933 Act").

In addition, the Fund may make opportunistic investments from time to time in stressed and distressed securities, including debtor-in-possession loans (sometimes referred to as “DIP” loans), exit financings, rescue financings, and post-bankruptcy equity securities, as well as preferred stock, convertible debt, and other securitized vehicles. DIP loans are a special kind of financing meant for companies that are financially distressed and in bankruptcy. Such loans typically have priority over existing debt, equity and other claims. 
 
The corporate loans (commonly referred to as “bank loans”) in which the Fund invests are typically senior in payment priority and secured by a lien on the borrower’s assets.  These corporate loans may include second lien loans, mezzanine loans and, to a limited extent, DIP loans.  The capacity of a company to borrow and the quality of the credit underlying a corporate loan are typically determined based upon one or more of the projected cash flows of the borrower, the enterprise value of the borrower or the asset value of the collateral supporting any liens.

The corporate debt securities, including high yield bonds, and other similar debt instruments in which the Fund invests are typically unsecured and may be subordinated in payment priority to other debt of the borrower.  The terms governing these debt instruments may include features that can result in principal appreciation under certain circumstances.  The capacity of a company to issue debt securities or other similar debt instruments and the quality of the credit underlying a company’s debt securities or other similar debt instruments are typically determined based upon the projected cash flows of the borrower, the enterprise value of the borrower or both.

The Fund is non-diversified and therefore may, from time to time, have significant exposure to a limited number of issuers.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the Federal Deposit Insurance Corporation (the "FDIC") or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Fixed-Income Risk: The market value of the Fund’s fixed-income securities responds to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and increase in value if interest rates fall. Normally, the longer the maturity or duration of the fixed-income securities the Fund owns, the more sensitive the value of the Fund’s shares will be to changes in interest rates.

•
Corporate Loan Risk: The corporate loans, commonly referred to as bank loans, in which the Fund invests may be rated below investment grade. As a result, such corporate loans will be considered speculative with respect to the borrowers’ ability to make payments of interest and principal and will otherwise generally bear risks similar to those associated with non-investment grade securities. There is a high risk that the Fund could suffer a loss from investments in lower rated corporate loans as a result of a default by the borrower. Direct investments in loans may be illiquid and holding a loan could expose the Fund to the risks of being a direct lender.

•
Credit Risk: The fixed-income securities in the Fund’s portfolio are subject to the possibility that a deterioration, whether sudden or gradual, in the financial condition of an issuer, or a deterioration in general economic conditions, could cause an issuer to fail to make timely payments of principal or interest, when due. This may cause the issuer’s securities to decline in value.
 
•
Interest Rate Risk: In general, when interest rates rise, the prices of debt securities fall, and when interest rates fall, the prices of debt securities rise. The price volatility of a debt security also depends on its maturity. Longer-term securities are generally more volatile, so the longer the average maturity or duration of these securities, the greater their price risk. Recent and potential future changes in government policy may affect interest rates.

•
Non-Investment-Grade Debt Securities Risk: Non-investment-grade debt securities are sometimes referred to as “junk bonds” and are considered speculative with respect to their issuers’ ability to make payments of interest and principal. There is a high risk that the Fund could suffer a loss from investments in non-investment-grade debt securities caused by the default of an issuer of such securities. Non-investment-grade debt securities may also be less liquid than investment-grade debt securities.

•
Distressed Securities Risk: Distressed securities are speculative and involve significant risks in addition to the risks generally applicable to non-investment grade debt securities. Distressed securities bear a substantial risk of default, and may be in default at the time of investment. The Fund will generally not receive interest payments on distressed securities, and there is a significant risk that principal will not be repaid, in full or at all. Distressed securities will likely be illiquid and may be subject to restrictions on resale.

Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Collateralized Loan Obligations Risk: Typically, collateralized loan obligations are privately offered and sold, and thus are not registered under the securities laws. As a result, the Fund may in certain circumstances characterize its investments in collateralized loan obligations as illiquid. Collateralized loan obligations are subject to the typical risks associated with debt instruments (i.e., interest rate risk and credit risk). Additional risks of collateralized loan obligations include the possibility that distributions from collateral securities will be insufficient to make interest or other payments, the potential for a decline in the quality of the collateral, and the possibility that the Fund may invest in a subordinate tranche of a collateralized loan obligation.

Derivatives Risk: The use of derivatives may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives. Risks associated with derivatives may include the risk that the derivative does not correlate well with the security, index, or currency to which it relates, the risk that the Fund will be unable to sell or close out the derivative due to an illiquid market, the risk that the counterparty may be unwilling or unable to meet its obligations, and the risk that the derivative could expose the Fund to the risk of magnified losses resulting from leverage. These additional risks could cause the Fund to experience losses to which it would otherwise not be subject.
 
•
Futures Contracts Risk: The risks associated with the Fund’s futures positions include liquidity and counterparty risks associated with derivative instruments.

•
Options Risk: Options trading is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The value of options can be highly volatile, and their use can result in loss if the sub-advisor is incorrect in its expectation of price fluctuations. Options, whether exchange traded or over-the-counter, may also be illiquid.

•
Swap Agreement Risk: Swap agreements (“swaps”), including total return swaps, are individually negotiated and structured to include exposure to a variety of different types of investments or market factors. Swaps may increase or decrease the overall volatility of the investments of the Fund and its share price. The performance of swaps may be affected by a change in the specific interest rate, currency, or other factors that determine the amounts of payments due to and from the Fund. A swap can be a form of leverage, which can magnify the Fund’s gains or losses. Total return swaps may be used to obtain exposure to a security or market without owning or taking physical custody of such security or investing directly in such market. Upon entering into a total return swap, the Fund is required to deposit initial margin but the parties do not exchange the notional amount. As a result, total return swaps may effectively add leverage to the Fund’s portfolio because the Fund would be subject to investment exposure on the notional amount of the swap.

Leverage Risk: Leverage occurs when the Fund uses borrowings, derivatives (such as futures or options), or similar instruments or techniques to gain exposure to investments in an amount that exceeds the Fund's initial investment. The use of leverage magnifies changes in the Fund's net asset value and thus may result in increased portfolio volatility and increased risk of loss. Leverage can create an interest expense that may lower the Fund’s overall returns. There can be no guarantee that a leveraging strategy will be successful.

Convertible Securities Risk: Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying security.
 
Counterparty Risk:  The issuer or guarantor of a fixed-income security, a counterparty (the other party to a transaction or an agreement ) to a transaction with the Fund, or a borrower of the Fund's securities may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.

•
Preferred Stock Risk: In the event an issuer is liquidated or declares bankruptcy, the claims of owners of bonds take precedence over the claims of those who own preferred and common stock. If interest rates rise, the fixed dividend on preferred stocks may be less attractive, causing the price of preferred stocks to decline.

Foreign Securities Risk: Investing in foreign securities poses additional risks since political and economic events unique in a country or region will affect those markets and their issuers, while such events may not necessarily affect the U.S. economy or issuers located in the United States. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund's investments. There are also risks associated with foreign accounting standards, government regulation, market information, and clearance and settlement procedures. Foreign markets may be less liquid and more volatile than U.S. markets and offer less protection to investors.
 
Liquidity Risk: Liquidity risk exists when particular investments are difficult to purchase or sell. This can reduce the Fund’s returns because the Fund may be unable to transact at advantageous times or prices, or at all.

Non-Diversification Risk: The Fund is non-diversified, which means that it may invest a greater percentage of its assets than a diversified mutual fund in the securities of a limited number of issuers. The use of a non-diversified investment strategy may increase the volatility of the Fund’s investment performance, as the Fund may be more susceptible to risks associated with a single economic, political or regulatory event.

Pay-In-Kind Bonds Risk: Pay-in-kind bonds, a type of mezzanine financing, are securities that, at the issuer’s option, pay interest in either cash or additional securities for a specified period. Pay-in-kind bonds, like zero coupon bonds, are designed to give an issuer flexibility in managing cash flow. Pay-in-kind bonds are expected to reflect the market value of the underlying debt plus an amount representing accrued interest since the last payment. Pay-in-kind bonds are usually less volatile than zero coupon bonds, but more volatile than cash pay securities.
 
Rule 144A Securities Risk: Rule 144A securities are restricted securities that may be purchased only by qualified institutional buyers in reliance on an exemption from federal registration requirements. Investing in Rule 144A securities may reduce the liquidity of the Fund's portfolio if an adequate institutional trading market for these securities does not exist. Prices of Rule 144A securities often reflect a discount, which may be significant, from the market price of comparable exchange-listed securities for which a liquid trading market exists. 
 
Short Sales Risk: In a short sale, the Fund sells a security or other financial instrument, such as a futures contract, that it does not own. To complete the transaction, the Fund must borrow the security to make delivery to the buyer. The Fund is then obligated to replace the borrowed security by purchasing the security at the market price at the time of replacement. If the price of the security sold short rises between the time the Fund sells the security short and the time the Fund replaces the security sold short, the Fund will realize a loss on the transaction.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus The Fund is non-diversified, which means that it may invest a greater percentage of its assets than a diversified mutual fund in the securities of a limited number of issuers. The use of a non-diversified investment strategy may increase the volatility of the Fund’s investment performance, as the Fund may be more susceptible to risks associated with a single economic, political or regulatory event.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
On September 6, 2019, the Touchstone Credit Opportunities Fund, previously a series of Touchstone Strategic Trust (the "Predecessor Fund"), was reorganized into the Fund. As a result of the reorganization, the performance and accounting history of the Predecessor Fund was assumed by the Fund. Financial and performance information prior to September 6, 2019 is that of the Predecessor Fund.

The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and since inception compare with the ICE BofA Merrill Lynch 3-Month U.S. Treasury Bill Index. The bar chart does not reflect any sales charges, which would reduce your return. The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and since inception compare with the ICE BofA Merrill Lynch 3-Month U.S. Treasury Bill Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Credit Opportunities II Fund — Class A Shares Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: First Quarter 2019 6.94%
 
Worst Quarter: Fourth Quarter 2018 (4.33)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Touchstone Credit Opportunities II Fund | ICE BofA Merrill Lynch 3-Month U.S. Treasury Bill Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel ICE BofA Merrill Lynch 3-Month U.S. Treasury Bill Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 2.28%
Since Inception rr_AverageAnnualReturnSinceInception 1.24%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 31, 2015
Touchstone Credit Opportunities II Fund | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMARX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.10%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 1.60%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.70%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.56% [8]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.37%) [9]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.19% [8],[9]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 615
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,133
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,675
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 3,153
Annual Return 2016 rr_AnnualReturn2016 11.44%
Annual Return 2017 rr_AnnualReturn2017 6.35%
Annual Return 2018 rr_AnnualReturn2018 (2.64%)
Annual Return 2019 rr_AnnualReturn2019 14.22%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.94%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter: 
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (4.33%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 8.48%
Since Inception rr_AverageAnnualReturnSinceInception 4.57%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 31, 2015
Touchstone Credit Opportunities II Fund | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 5.86%
Since Inception rr_AverageAnnualReturnSinceInception 2.16%
Touchstone Credit Opportunities II Fund | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 5.04%
Since Inception rr_AverageAnnualReturnSinceInception 2.48%
Touchstone Credit Opportunities II Fund | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMACX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.10%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 1.92%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 2.02%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 3.63% [8]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.69%) [9]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.94% [8],[9]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 297
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 955
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,735
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,779
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 197
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 955
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,735
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,779
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 12.27%
Since Inception rr_AverageAnnualReturnSinceInception 5.30%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 31, 2015
Touchstone Credit Opportunities II Fund | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMAYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.10%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.90%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.00%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.61% [8]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.67%) [9]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.94% [8],[9]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 96
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 442
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 813
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,855
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 14.42%
Since Inception rr_AverageAnnualReturnSinceInception 6.26%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 31, 2015
Touchstone Credit Opportunities II Fund | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TARBX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [7]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.10%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.66%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.76%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.37% [8]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.53%) [9]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.84% [8],[9]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 86
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 382
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 699
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,600
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 14.63%
Since Inception rr_AverageAnnualReturnSinceInception 6.37%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 31, 2015
Touchstone High Yield Fund  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE HIGH YIELD FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone High Yield Fund (the “Fund”) seeks to achieve a high level of income as its main goal.  Capital appreciation is a secondary consideration.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 63% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 63.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds. 
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund normally invests at least 80% of its net assets (including borrowings for investment purposes) in non-investment-grade debt securities.  This is a non-fundamental policy that can be changed by the Fund upon 60 days’ prior notice to shareholders.  The Fund generally invests in non-investment-grade debt securities of domestic corporations, including Rule 144A securities, but may also invest in foreign-issued debt securities, including up to 5% of its total assets in securities of foreign companies that are denominated in a currency other than the U.S. dollar.  Non-investment-grade debt securities are higher risk, lower quality securities, often referred to as “junk bonds,” and are considered speculative.  They are rated below BBB- by Standard & Poor's Ratings Services and Fitch Ratings, Inc. or below Baa3 by Moody's Investors Services, Inc. The Fund's investment policies are based on credit ratings at the time of purchase.
 
In selecting securities for the Fund, the sub-advisor, Fort Washington Investment Advisors, Inc. ("Fort Washington"), analyzes the overall investment opportunities and risks in different industry sectors focusing on those industries that exhibit stability and predictability. Having developed certain industry biases resulting from the current macroeconomic environment, Fort Washington implements a process of elimination through which certain types of securities are removed from the list of initially selected securities due to their structure. The next step is to apply a rigorous credit selection process in order to identify securities that offer attractive investment opportunities.  Once a security has been purchased, the credit analysis process is re-applied to each individual security in the Fund’s portfolio on a periodic basis or as new information becomes available to determine whether or not to keep a security in the Fund’s portfolio.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Fixed-Income Risk: The market value of the Fund’s fixed-income securities responds to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and increase in value if interest rates fall. Normally, the longer the maturity or duration of the fixed-income securities the Fund owns, the more sensitive the value of the Fund’s shares will be to changes in interest rates.

•
Credit Risk: The fixed-income securities in the Fund’s portfolio are subject to the possibility that a deterioration, whether sudden or gradual, in the financial condition of an issuer, or a deterioration in general economic conditions, could cause an issuer to fail to make timely payments of principal or interest, when due. This may cause the issuer’s securities to decline in value.

•
Interest Rate Risk: In general, when interest rates rise, the prices of debt securities fall, and when interest rates fall, the prices of debt securities rise. The price volatility of a debt security also depends on its maturity. Longer-term securities are generally more volatile, so the longer the average maturity or duration of these securities, the greater their price risk. Recent and potential future changes in government policy may affect interest rates.

•
Non-Investment-Grade Debt Securities Risk: Non-investment-grade debt securities are sometimes referred to as “junk bonds” and are considered speculative with respect to their issuers’ ability to make payments of interest and principal. There is a high risk that the Fund could suffer a loss from investments in non-investment-grade debt securities caused by the default of an issuer of such securities. Non-investment-grade debt securities may also be less liquid than investment-grade debt securities.
 
Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Rule 144A Securities Risk: Rule 144A securities are restricted securities that may be purchased only by qualified institutional buyers in reliance on an exemption from federal registration requirements. Investing in Rule 144A securities may reduce the liquidity of the Fund's portfolio if an adequate institutional trading market for these securities does not exist. Prices of Rule 144A securities often reflect a discount, which may be significant, from the market price of comparable exchange-listed securities for which a liquid trading market exists.

Foreign Securities Risk: Investing in foreign securities poses additional risks since political and economic events unique in a country or region will affect those markets and their issuers, while such events may not necessarily affect the U.S. economy or issuers located in the United States. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund's investments. There are also risks associated with foreign accounting standards, government regulation, market information, and clearance and settlement procedures. Foreign markets may be less liquid and more volatile than U.S. markets and offer less protection to investors.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
On January 27, 2017, the Touchstone High Yield Fund, previously a series of Touchstone Investment Trust (the "Predecessor Fund"), was reorganized into the Fund. As a result of the reorganization, the performance and accounting history of the Predecessor Fund was assumed by the Fund.  Financial and performance information prior to January 27, 2017 is that of the Predecessor Fund.

The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the ICE BofA Merrill Lynch High Yield Cash Pay Index.  The bar chart does not reflect any sales charges, which would reduce your return. The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the ICE BofA Merrill Lynch High Yield Cash Pay Index. 
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone High Yield Fund — Class A Shares Total Returns as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: First Quarter 2019 7.81%
 
Worst Quarter: Third Quarter 2015 (5.99)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.

The inception date of Institutional Class shares of the Fund was January 27, 2012. Institutional Class shares' performance information was calculated using the historical performance of Class A shares for the periods prior to January 27, 2012. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Institutional Class shares.
Touchstone High Yield Fund | ICE BofA Merrill Lynch High Yield Cash Pay Index(reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel ICE BofA Merrill Lynch High Yield Cash Pay Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 14.40%
5 Years rr_AverageAnnualReturnYear05 6.12%
10 Years rr_AverageAnnualReturnYear10 7.49%
Touchstone High Yield Fund | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol THYAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [10]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.53%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.50%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.28%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.23%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.05% [11]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 305
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 576
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 867
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,695
Annual Return 2010 rr_AnnualReturn2010 13.34%
Annual Return 2011 rr_AnnualReturn2011 5.48%
Annual Return 2012 rr_AnnualReturn2012 12.91%
Annual Return 2013 rr_AnnualReturn2013 5.45%
Annual Return 2014 rr_AnnualReturn2014 1.65%
Annual Return 2015 rr_AnnualReturn2015 (5.07%)
Annual Return 2016 rr_AnnualReturn2016 11.61%
Annual Return 2017 rr_AnnualReturn2017 6.70%
Annual Return 2018 rr_AnnualReturn2018 (3.20%)
Annual Return 2019 rr_AnnualReturn2019 14.24%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 7.81%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (5.99%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 11.91%
5 Years rr_AverageAnnualReturnYear05 3.55%
10 Years rr_AverageAnnualReturnYear10 5.59%
Touchstone High Yield Fund | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 9.68%
5 Years rr_AverageAnnualReturnYear05 1.41%
10 Years rr_AverageAnnualReturnYear10 3.15%
Touchstone High Yield Fund | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 7.00%
5 Years rr_AverageAnnualReturnYear05 1.71%
10 Years rr_AverageAnnualReturnYear10 3.26%
Touchstone High Yield Fund | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol THYCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [10]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.53%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.57%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.10%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.30%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.80% [11]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 283
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 629
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,101
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,407
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 183
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 629
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,101
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,407
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 12.44%
5 Years rr_AverageAnnualReturnYear05 3.81%
10 Years rr_AverageAnnualReturnYear10 5.31%
Touchstone High Yield Fund | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol THYYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [10]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.53%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.38%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.91%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.11%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.80% [11]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 82
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 279
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 493
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,109
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 14.64%
5 Years rr_AverageAnnualReturnYear05 4.85%
10 Years rr_AverageAnnualReturnYear10 6.38%
Touchstone High Yield Fund | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol THIYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [10]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.53%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.24%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.77%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.72% [11]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 74
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 241
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 423
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 949
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 14.58%
5 Years rr_AverageAnnualReturnYear05 4.93%
10 Years rr_AverageAnnualReturnYear10 6.41%
Touchstone Impact Bond Fund  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE IMPACT BOND FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Impact Bond Fund (the “Fund”) seeks current income.  Capital appreciation is a secondary goal.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 22% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds. 
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal circumstances, at least 80% of its net assets (including borrowings for investment purposes) in fixed-income securities.  This is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders.  Fixed-income securities primarily consist of U.S. government obligations, corporate debt obligations (including non-investment-grade corporate debt obligations), mortgage-backed securities, and asset-backed securities.  U.S. government obligations include direct government obligations and those of government agencies and instrumentalities.  Corporate debt obligations include corporate bonds, debentures, notes and other similar instruments of U.S. corporations.  Investment-grade fixed-income securities include securities rated BBB- or higher by Standard & Poor’s Corporation (“S&P”) or Baa3 or higher by Moody’s Investors Services, Inc. (“Moody’s”) or, if unrated by S&P or Moody’s, determined by the sub-advisor, EARNEST Partners LLC ("EARNEST"), to be of comparable quality. The Fund's investment policies are based on credit ratings at the time of purchase.
 
The Fund will generally invest at least 90% of its total assets in investment-grade debt securities, but may invest up to 10% of its total assets in non-investment-grade debt securities, which are sometimes referred to as “junk bonds.”
 
The securities in which the Fund invests may pay interest at fixed rates, variable rates, or subject to reset terms.  In addition, these securities may make principal payments that are fixed, variable, or both.  The Fund may also invest in mortgage dollar rolls and zero coupon securities.  The Fund can invest in securities of any maturity.

EARNEST believes that entities that are cognizant of environmental, social, and governance issues tend to be more successful over time. As a result, EARNEST prefers to invest in government programs and companies that have sustainable operating models and seek to achieve positive aggregate societal impact. This inclusive approach views positive impact characteristics as additive to an investment’s risk/return profile. When assessing an investment's impact profile, EARNEST considers a wide range of factors, including but not limited to support for economic development, home ownership, and job creation.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency.  As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Fixed-Income Risk: The market value of the Fund’s fixed-income securities responds to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and increase in value if interest rates fall. Normally, the longer the maturity or duration of the fixed-income securities the Fund owns, the more sensitive the value of the Fund’s shares will be to changes in interest rates.
 
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Asset-Backed Securities Risk: Asset-backed securities are fixed-income securities backed by other assets such as credit card, automobile or consumer loan receivables, retail installment loans, or participations in pools of leases. The values of these securities are sensitive to changes in the credit quality of the underlying collateral, the credit strength of any credit enhancement feature, changes in interest rates, and, at times, the financial condition of the issuer. 

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Credit Risk: The fixed-income securities in the Fund’s portfolio are subject to the possibility that a deterioration, whether sudden or gradual, in the financial condition of an issuer, or a deterioration in general economic conditions, could cause an issuer to fail to make timely payments of principal or interest, when due. This may cause the issuer’s securities to decline in value.
 
•
Interest Rate Risk: In general, when interest rates rise, the prices of debt securities fall, and when interest rates fall, the prices of debt securities rise. The price volatility of a debt security also depends on its maturity. Longer-term securities are generally more volatile, so the longer the average maturity or duration of these securities, the greater their price risk. Recent and potential future changes in government policy may affect interest rates.
 
•
Investment-Grade Debt Securities Risk: Investment-grade debt securities may be downgraded by a NRSRO to below-investment-grade status, which would increase the risk of holding these securities. Investment-grade debt securities rated in the lowest rating category by a NRSRO involve a higher degree of risk than fixed-income securities with higher credit ratings.

•
Mortgage-Backed Securities Risk:  Mortgage-backed securities are fixed-income securities representing an interest in a pool of underlying mortgage loans. Mortgage-backed securities are sensitive to changes in interest rates, but may respond to these changes differently from other fixed-income securities due to the possibility of prepayment of the underlying mortgage loans. Mortgage-backed securities may fluctuate in price based on deterioration in the value of the collateral underlying the pool of mortgage loans, which may result in the collateral being worth less than the remaining principal amount owed on the mortgages in the pool.

•
Non-Investment-Grade Debt Securities Risk: Non-investment-grade debt securities are sometimes referred to as “junk bonds” and are considered speculative with respect to their issuers’ ability to make payments of interest and principal. There is a high risk that the Fund could suffer a loss from investments in non-investment-grade debt securities caused by the default of an issuer of such securities. Non-investment-grade debt securities may also be less liquid than investment-grade debt securities.

•
Prepayment Risk: The risk that a debt security may be paid off and proceeds invested earlier than anticipated. Prepayment impacts both the interest rate sensitivity of the underlying asset, such as an asset-backed or mortgage-backed security and its cash flow projections. Therefore, prepayment risk may make it difficult to calculate the average duration of the Fund’s asset- or mortgage-backed securities which in turn would make it difficult to assess the interest rate risk of the Fund.

Impact Investing Risk: The Fund’s impact screening criteria may cause the Fund to forgo opportunities to buy certain securities, or forgo opportunities to gain exposure to certain industries, sectors, regions and countries. In addition, the Fund may be required to sell a security when it might otherwise be disadvantageous for it to do so.

U.S. Government Agencies Securities Risk: Certain U.S. government agency securities are backed by the right of the issuer to borrow from the U.S. Treasury while others are supported only by the credit of the issuer or instrumentality.  While the U.S. government is able to provide financial support to U.S. government-sponsored agencies or instrumentalities, no assurance can be given that it will always do so.

Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Mortgage Dollar Roll Risk: Mortgage “dollar rolls” are transactions in which mortgage-backed securities are sold for delivery in the current month and the seller simultaneously contracts to repurchase substantially similar securities on a specified future date. If the broker-dealer to whom the Fund sells the security becomes insolvent, the Fund’s right to repurchase the security may be restricted. Other risks involved in entering into mortgage dollar rolls include the risk that the value of the security may change adversely over the term of the mortgage dollar roll and that the security the Fund is required to repurchase may be worth less than the security that the Fund held.

Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
On August 1, 2011, the EARNEST Partners Fixed Income Trust (the “Predecessor Fund”), a series of the Nottingham Investment Trust II, was reorganized into the Fund.  Prior to the reorganization, the Predecessor Fund had an investment goal and principal investment strategies similar to those of the Fund.  Performance information presented prior to August 1, 2011 is that of the Predecessor Fund.

The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Bloomberg Barclays U.S. Aggregate Bond Index.  The bar chart does not reflect any sales charges, which would reduce your return.  The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Bloomberg Barclays U.S. Aggregate Bond Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Impact Bond Fund — Class Y Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return. 
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: Second Quarter 2010 3.28%
 
Worst Quarter: Fourth Quarter 2016 (2.91)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class Y shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class Y shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class Y shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class Y shares' after-tax returns.
 
The inception dates of Class A shares, Class C shares and Institutional Class shares were August 16, 2010, August 1, 2011 and August 1, 2011, respectively. Class A , Class C and Institutional Class shares' performance was calculated using the historical performance of Class Y shares for the periods prior to August 16, 2010, August 1, 2011 and August 1, 2011, respectively. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Class A, Class C and Institutional Class shares.
Touchstone Impact Bond Fund | Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 8.72%
5 Years rr_AverageAnnualReturnYear05 3.05%
10 Years rr_AverageAnnualReturnYear10 3.75%
Touchstone Impact Bond Fund | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TCPAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [12]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.35%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.59%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.20% [13]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.34%) [13],[14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.86% [13],[14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 286
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 540
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 814
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,596
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 5.41%
5 Years rr_AverageAnnualReturnYear05 1.63%
10 Years rr_AverageAnnualReturnYear10 3.37%
Touchstone Impact Bond Fund | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TCPCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [12]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.35%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.59%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.95% [13]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.34%) [13],[14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.61% [13],[14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 264
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 786
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,435
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,175
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 164
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 786
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,435
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,175
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 5.76%
5 Years rr_AverageAnnualReturnYear05 1.85%
10 Years rr_AverageAnnualReturnYear10 3.09%
Touchstone Impact Bond Fund | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TCPYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [12]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.35%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.33%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.69% [13]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [13],[14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.61% [13],[14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 62
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 213
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 376
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 851
Annual Return 2010 rr_AnnualReturn2010 9.08%
Annual Return 2011 rr_AnnualReturn2011 8.10%
Annual Return 2012 rr_AnnualReturn2012 5.71%
Annual Return 2013 rr_AnnualReturn2013 (2.17%)
Annual Return 2014 rr_AnnualReturn2014 6.67%
Annual Return 2015 rr_AnnualReturn2015 (0.20%)
Annual Return 2016 rr_AnnualReturn2016 2.85%
Annual Return 2017 rr_AnnualReturn2017 3.94%
Annual Return 2018 rr_AnnualReturn2018 0.15%
Annual Return 2019 rr_AnnualReturn2019 7.91%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.28%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.91%)
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 7.91%
5 Years rr_AverageAnnualReturnYear05 2.89%
10 Years rr_AverageAnnualReturnYear10 4.14%
Touchstone Impact Bond Fund | Class Y | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Y Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 6.75%
5 Years rr_AverageAnnualReturnYear05 1.67%
10 Years rr_AverageAnnualReturnYear10 2.82%
Touchstone Impact Bond Fund | Class Y | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Y Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 4.67%
5 Years rr_AverageAnnualReturnYear05 1.65%
10 Years rr_AverageAnnualReturnYear10 2.64%
Touchstone Impact Bond Fund | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TCPNX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [12]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.35%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.25%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.61% [13]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [13],[14]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.51% [13],[14]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 52
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 185
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 330
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 753
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 8.02%
5 Years rr_AverageAnnualReturnYear05 3.01%
10 Years rr_AverageAnnualReturnYear10 4.24%
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE INTERNATIONAL ESG EQUITY FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone International ESG Equity Fund (the “Fund”) (formerly known as Touchstone Premium Yield Equity Fund) seeks long-term growth of capital.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 123% of the average value of its portfolio. On August 23, 2019, the Fund changed its name, principal investment strategies and sub-advisor.  Consequently, this portfolio turnover is largely attributable to the previous sub-advisor and investment strategy.  Frequent and active trading is not expected to be a principal investment strategy of the Fund under the Fund’s current principal investment strategies; however, portfolio turnover is expected to be higher in the current period as a result of the change in sub-advisor.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 123.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal circumstances, at least 80% of its assets in equity securities of non-U.S. companies that meet certain financial and environmental, social, and governance ("ESG") criteria. The Fund’s 80% policy is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders. Equity securities include common stocks, preferred stocks, convertible securities, depositary receipts such as American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and European Depositary Receipts (“EDRs”), and interests in other investment companies, including exchange-traded funds that invest in equity securities.

The Fund’s sub-advisor, Rockefeller & Co. LLC (“Rockefeller”), selects investments for the Fund based on an evaluation of a company’s financial condition and its ESG practices. Rockefeller applies “bottom-up” security analysis that includes fundamental, sector-based research in seeking to identify businesses that have high or improving returns on capital, barriers to competition, and compelling valuations. Rockefeller believes that integrating ESG analysis into the investment process provides additional insight into a company's long-term competitive edge and helps identify risks and opportunities that financial analysis might not fully consider. Rockefeller analyzes the potential ESG opportunities and risks of a company, considers how well the company manages these opportunities and risks, and ascertains the company’s willingness and ability to take a leadership position in implementing best practices. Through this evaluation and ongoing engagement, Rockefeller seeks to support and encourage the company’s progress toward sustainability.

The Fund invests in securities of any size, but generally focuses on larger, more established companies. The Fund invests primarily in securities of companies domiciled in developed markets, but may invest up to 30% of its net assets in securities of companies domiciled in emerging and frontier markets. Emerging markets are defined as those countries not included in the MSCI World Index, a developed market index. As of December 31, 2019, the countries in the MSCI World Index included: Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland, the United Kingdom, and the United States. The country composition of the MSCI World Index can change over time. Frontier markets are those emerging market countries that have the smallest, least mature economies and least developed capital markets.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.
 
•
Large-Cap Risk: Large-cap companies may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.
 
•
Mid-Cap Risk:  Stocks of mid-sized companies may be subject to more abrupt or erratic market movements than stocks of larger, more established companies. Mid-sized companies may have limited product lines or financial resources, and may be dependent upon a particular niche of the market.

•
Preferred Stock Risk: In the event an issuer is liquidated or declares bankruptcy, the claims of owners of bonds take precedence over the claims of those who own preferred and common stock. If interest rates rise, the fixed dividend on preferred stocks may be less attractive, causing the price of preferred stocks to decline.
 
•
Small-Cap Risk: Stocks of smaller companies may be subject to more abrupt or erratic market movements than stocks of larger, more established companies. Small companies may have limited product lines or financial resources and may be dependent upon a small or inexperienced management group.

Foreign Securities Risk: Investing in foreign securities poses additional risks since political and economic events unique in a country or region will affect those markets and their issuers, while such events may not necessarily affect the U.S. economy or issuers located in the United States. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund's investments. There are also risks associated with foreign accounting standards, government regulation, market information, and clearance and settlement procedures. Foreign markets may be less liquid and more volatile than U.S. markets and offer less protection to investors.

•
Depositary Receipts Risk: Foreign receipts, which include ADRs, Global Depositary Receipts, and European Depositary Receipts, are securities that evidence ownership interests in a security or a pool of securities issued by a foreign issuer. The risks of depositary receipts include many risks associated with investing directly in foreign securities.
 
•
Emerging Markets Risk: Emerging markets may be more likely to experience political turmoil or rapid changes in market or economic conditions than more developed countries. In addition, the financial stability of issuers (including governments) in emerging market countries may be more precarious than that of issuers in other countries.

•
Frontier Markets Risk: Frontier markets have similar risks to emerging markets, except that these risks are often magnified in a frontier market due to its smaller and less developed economy. As a result, frontier markets may experience greater changes in market or economic conditions, financial stability, price volatility, currency fluctuations, and other risks inherent in foreign securities.

ESG Investing Risk: The Fund’s environmental, social, and governance screening criteria may cause the Fund to forgo opportunities to buy certain securities, or forgo opportunities to gain exposure to certain industries, sectors, regions and countries. In addition, the Fund may be required to sell a security when it might otherwise be disadvantageous for it to do so.

Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Convertible Securities Risk: Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying security.

Other Investment Companies Risk (including Exchange-Traded Funds Risk): The Fund’s investments in other investment companies, including ETFs, will be subject to substantially the same risks as those associated with the direct ownership of the securities comprising the portfolios of such investment companies, and the value of the Fund’s investment will fluctuate in response to the performance of such portfolios. In addition, if the Fund acquires shares of investment companies or ETFs, shareholders of the Fund will bear both their proportionate share of the fees and expenses of the Fund or ETF (including management and advisory fees) and, indirectly, the fees expenses of the investment companies or ETFs.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the MSCI All Country World ex-USA Index, Russell 3000® Value Index and the Dow Jones U.S. Select Dividend Index.  The bar chart does not reflect any sales charges, which would reduce your return. The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
 
On August 23, 2019, the Fund changed its name, principal investment strategies, and sub-advisor. Performance presented prior to such date should not be attributed to the Fund's current sub-advisor, Rockefeller. The Fund's performance shown below might have differed materially if Rockefeller had managed the Fund pursuant to its current strategies prior to August 23, 2019.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the MSCI All Country World ex-USA Index, Russell 3000® Value Index and the Dow Jones U.S. Select Dividend Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone International ESG Equity Fund — Class A Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: Fourth Quarter 2011 13.61%
 
Worst Quarter: Fourth Quarter 2018 (11.82)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | MSCI All Country World ex-USA Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel MSCI All Country World ex-USA Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 21.51% [15]
5 Years rr_AverageAnnualReturnYear05 5.51% [15]
10 Years rr_AverageAnnualReturnYear10 4.97% [15]
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Russell 3000® Value Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell 3000® Value Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 26.26% [15]
5 Years rr_AverageAnnualReturnYear05 8.20% [15]
10 Years rr_AverageAnnualReturnYear10 11.71% [15]
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Dow Jones U.S. Select Dividend Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Dow Jones U.S. Select Dividend Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 23.11% [15]
5 Years rr_AverageAnnualReturnYear05 9.91% [15]
10 Years rr_AverageAnnualReturnYear10 13.41% [15]
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TPYAX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [16]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.65% [17]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.57%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.47% [18]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.30%) [19]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.17% [18],[19],[20]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 613
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 914
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,236
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,145
Annual Return 2010 rr_AnnualReturn2010 10.59%
Annual Return 2011 rr_AnnualReturn2011 15.25%
Annual Return 2012 rr_AnnualReturn2012 6.93%
Annual Return 2013 rr_AnnualReturn2013 21.68%
Annual Return 2014 rr_AnnualReturn2014 11.34%
Annual Return 2015 rr_AnnualReturn2015 (10.50%)
Annual Return 2016 rr_AnnualReturn2016 17.42%
Annual Return 2017 rr_AnnualReturn2017 12.43%
Annual Return 2018 rr_AnnualReturn2018 (9.45%)
Annual Return 2019 rr_AnnualReturn2019 23.21%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2011
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.61%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (11.82%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 17.09%
5 Years rr_AverageAnnualReturnYear05 4.43%
10 Years rr_AverageAnnualReturnYear10 8.65%
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 11.59%
5 Years rr_AverageAnnualReturnYear05 2.08%
10 Years rr_AverageAnnualReturnYear10 6.96%
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 14.05%
5 Years rr_AverageAnnualReturnYear05 3.22%
10 Years rr_AverageAnnualReturnYear10 6.86%
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TPYCX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [16]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.65% [17]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.46%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.11% [18]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%) [19]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.95% [18],[19]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 298
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 646
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,119
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,429
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 198
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 646
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,119
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,429
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 21.31%
5 Years rr_AverageAnnualReturnYear05 4.89%
10 Years rr_AverageAnnualReturnYear10 8.49%
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TPYYX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [16]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.65% [17]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.39%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.04% [18]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%) [19]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.90% [18],[19],[20]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 92
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 317
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 560
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,258
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 23.60%
5 Years rr_AverageAnnualReturnYear05 5.97%
10 Years rr_AverageAnnualReturnYear10 9.58%
TOUCHSTONE INTERNATIONAL ESG EQUITY FUND | Institutional Class  
Prospectus: rr_ProspectusTable  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.65% [17]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 2642.87%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2643.52%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (2642.63%) [19]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.89% [19]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 91
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 137,699
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 137,699
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 137,699
TOUCHSTONE MID CAP FUND  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE MID CAP FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Mid Cap Fund (the “Fund”) seeks long-term capital growth.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 25% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 25.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal market conditions, at least 80% of its assets in common stocks of medium capitalization U.S. listed companies.  This is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders.  For purposes of the Fund, a medium capitalization company has a market capitalization found within the range of market capitalizations represented in the Russell Midcap® Index (between $824 million to $78.6 billion as of December 31, 2019) at the time of purchase.  The size of the companies in the Russell Midcap® Index will change with market conditions.
 
The Fund’s sub-advisor, London Company of Virginia d/b/a/ The London Company (“The London Company”), seeks to purchase financially stable mid-cap companies that The London Company believes are consistently generating high returns on unleveraged operating capital, run by shareholder-oriented management, and trading at a discount to their respective market prices.  Guiding principles of The London Company’s mid-cap philosophy include (1) a focus on cash return on tangible capital, not earnings per share, (2) balance sheet optimization, (3) optimal diversification is essential to good investment results, and (4) low turnover and tax sensitivity enhances real returns.
 
The Fund will typically hold securities of approximately 30 to 40 companies.  The Fund may invest a high percentage of its assets in specific sectors of the market in order to achieve a potentially greater investment return. The London Company invests for the long term and attempts to minimize turnover in an effort to reduce transaction costs and taxes.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.
 
•
Mid-Cap Risk:  Stocks of mid-sized companies may be subject to more abrupt or erratic market movements than stocks of larger, more established companies. Mid-sized companies may have limited product lines or financial resources, and may be dependent upon a particular niche of the market.
 
Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors. 
 
Sector Focus Risk: A fund that focuses its investments in the securities of a particular market sector is subject to the risk that adverse circumstances will have a greater impact on the fund than a fund that does not focus its investments in a particular sector.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Russell Midcap® Index.  The bar chart does not reflect any sales charges, which would reduce your return.  The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Russell Midcap® Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Mid Cap Fund - Class A Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return. 
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: First Quarter 2013 16.66%
 
Worst Quarter: Third Quarter 2011 (17.70)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
 
The inception date of Institutional Class shares was January 27, 2012. Institutional Class shares' performance was calculated using the historical performance of Class Y shares for the periods prior to January 27, 2012. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Institutional Class shares.
TOUCHSTONE MID CAP FUND | Russell Midcap® Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell Midcap® Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 30.54%
5 Years rr_AverageAnnualReturnYear05 9.33%
10 Years rr_AverageAnnualReturnYear10 13.19%
TOUCHSTONE MID CAP FUND | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMAPX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [21]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75% [22]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.34%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.34% [23]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.13%) [24]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.21% [23],[24],[25]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 617
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 891
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,186
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,021
Annual Return 2010 rr_AnnualReturn2010 23.14%
Annual Return 2011 rr_AnnualReturn2011 1.70%
Annual Return 2012 rr_AnnualReturn2012 19.50%
Annual Return 2013 rr_AnnualReturn2013 35.09%
Annual Return 2014 rr_AnnualReturn2014 9.25%
Annual Return 2015 rr_AnnualReturn2015 (5.71%)
Annual Return 2016 rr_AnnualReturn2016 15.34%
Annual Return 2017 rr_AnnualReturn2017 19.93%
Annual Return 2018 rr_AnnualReturn2018 (3.42%)
Annual Return 2019 rr_AnnualReturn2019 35.95%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.66%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.70%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 29.15%
5 Years rr_AverageAnnualReturnYear05 10.05%
10 Years rr_AverageAnnualReturnYear10 13.55%
TOUCHSTONE MID CAP FUND | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 28.30%
5 Years rr_AverageAnnualReturnYear05 9.64%
10 Years rr_AverageAnnualReturnYear10 13.31%
TOUCHSTONE MID CAP FUND | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 17.87%
5 Years rr_AverageAnnualReturnYear05 7.92%
10 Years rr_AverageAnnualReturnYear10 11.40%
TOUCHSTONE MID CAP FUND | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMCJX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [21]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75% [22]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.30%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.05% [23]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [24]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.96% [23],[24],[25]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 299
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 634
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,095
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,372
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 199
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 634
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,095
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,372
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 33.92%
5 Years rr_AverageAnnualReturnYear05 10.53%
10 Years rr_AverageAnnualReturnYear10 13.34%
TOUCHSTONE MID CAP FUND | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMCPX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [21]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75% [22]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.30%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.05% [23]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [24]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.96% [23],[24],[25]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 98
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 325
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 571
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,274
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 36.29%
5 Years rr_AverageAnnualReturnYear05 11.64%
10 Years rr_AverageAnnualReturnYear10 14.48%
TOUCHSTONE MID CAP FUND | Class Z  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMCTX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [21]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75% [22]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.35%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.35% [23]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%) [24]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.21% [23],[24],[25]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 123
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 414
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 726
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,612
Label rr_AverageAnnualReturnLabel Class Z Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 35.93%
5 Years rr_AverageAnnualReturnYear05 11.36%
10 Years rr_AverageAnnualReturnYear10 14.18%
TOUCHSTONE MID CAP FUND | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMPIX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [21]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75% [22]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.95% [23]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.06%) [24]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.89% [23],[24],[25]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 91
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 297
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 520
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,161
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 36.41%
5 Years rr_AverageAnnualReturnYear05 11.72%
10 Years rr_AverageAnnualReturnYear10 14.55%
Touchstone Mid Cap Value Fund  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE MID CAP VALUE FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Mid Cap Value Fund (the “Fund”) seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 34% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 34.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal conditions, at least 80% of its net assets (including borrowings for investment purposes) in common stocks of companies with medium market capitalizations.  This is a non-fundamental policy that the Fund can change upon 60 days’ prior notice to shareholders.  For purposes of the Fund, a medium capitalization company has a market capitalization within the range of market capitalization represented in the Russell Midcap® Value Index (between $824million to $43.7 billion as of December 31, 2019) at the time of purchase.  The size of the companies in the Russell Midcap Value Index will change with market conditions. The Fund will hold approximately 60 to 80 securities. 

The Fund's sub-advisor, LMCG Investments, LLC (“LMCG” ), employs a fundamental investment process which seeks to identify companies which it believes are selling at a discount to their intrinsic value.  In evaluating and selecting potential investments for the Fund, LMCG completes in-depth research and analysis on the securities in the investable universe in an effort to identify leading companies selling at attractive valuations.  The research and analysis include an examination of financial statements and assessments of the management team, the company’s competitive strategy and its current market position. The Fund may invest in other investment companies in pursuing its strategy.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.
 
•
Mid-Cap Risk:  Stocks of mid-sized companies may be subject to more abrupt or erratic market movements than stocks of larger, more established companies. Mid-sized companies may have limited product lines or financial resources, and may be dependent upon a particular niche of the market.
 
Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors. 

Value Investing Risk: Value investing presents the risk that the Fund’s security holdings may never reach their full intrinsic value because the market fails to recognize what the portfolio managers consider the true business value or because the portfolio managers have misjudged those values.

Other Investment Companies Risk: The Fund’s investments in other investment companies will be subject to substantially the same risks as those associated with the direct ownership of the securities comprising the portfolios of such investment companies, and the value of the Fund's investment will fluctuate in response to the performance of such portfolios. In addition, if the Fund acquires shares of investment companies, shareholders of the Fund will bear their proportionate share of the fees and expenses of the Fund and, indirectly, the fees and expenses of the investment companies.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years and ten years compare with the Russell Midcap® Value Index.  The bar chart does not reflect any sales charges, which would reduce your return. The performance table reflects any applicable sales charges.  Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years and ten years compare with the Russell Midcap® Value Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Mid Cap Value Fund — Class A Shares Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: First Quarter 2019 14.61%
 
Worst Quarter: Third Quarter 2011 (20.13)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Touchstone Mid Cap Value Fund | Russell MidCap® Value Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell MidCap® Value Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 27.06%
5 Years rr_AverageAnnualReturnYear05 7.62%
Since Inception rr_AverageAnnualReturnSinceInception 12.41%
Touchstone Mid Cap Value Fund | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TCVAX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [26]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.53%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.53%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.31%) [27]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.22% [27]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 618
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 930
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,265
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,207
Annual Return 2010 rr_AnnualReturn2010 26.00%
Annual Return 2011 rr_AnnualReturn2011 (4.66%)
Annual Return 2012 rr_AnnualReturn2012 14.99%
Annual Return 2013 rr_AnnualReturn2013 32.96%
Annual Return 2014 rr_AnnualReturn2014 9.13%
Annual Return 2015 rr_AnnualReturn2015 (2.28%)
Annual Return 2016 rr_AnnualReturn2016 20.58%
Annual Return 2017 rr_AnnualReturn2017 13.68%
Annual Return 2018 rr_AnnualReturn2018 (17.08%)
Annual Return 2019 rr_AnnualReturn2019 29.23%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 14.61%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (20.13%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 22.77%
5 Years rr_AverageAnnualReturnYear05 6.24%
Since Inception rr_AverageAnnualReturnSinceInception 10.48%
Touchstone Mid Cap Value Fund | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 22.59%
5 Years rr_AverageAnnualReturnYear05 5.05%
Since Inception rr_AverageAnnualReturnSinceInception 9.18%
Touchstone Mid Cap Value Fund | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 13.59%
5 Years rr_AverageAnnualReturnYear05 4.63%
Since Inception rr_AverageAnnualReturnSinceInception 8.22%
Touchstone Mid Cap Value Fund | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TMFCX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [26]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.65%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.40%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.43%) [27]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.97% [27]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 300
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 707
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,242
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,704
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 200
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 707
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,242
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,704
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 27.28%
5 Years rr_AverageAnnualReturnYear05 6.69%
Since Inception rr_AverageAnnualReturnSinceInception 10.32%
Touchstone Mid Cap Value Fund | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TCVYX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [26]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.44%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.19%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.22%) [27]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.97% [27]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 99
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 356
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 633
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,424
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 29.56%
5 Years rr_AverageAnnualReturnYear05 7.76%
Since Inception rr_AverageAnnualReturnSinceInception 11.43%
Touchstone Mid Cap Value Fund | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TCVIX
Maximum Cumulative Sales Charge (as a percentage of Offering Price) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [26]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.22%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.97%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.13%) [27]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.84% [27]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 86
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 296
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 524
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,178
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 29.77%
5 Years rr_AverageAnnualReturnYear05 7.91%
Since Inception rr_AverageAnnualReturnSinceInception 11.59%
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Sands Capital Select Growth Fund (the “Fund”) seeks long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 25% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 25.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal market conditions, at least 80% of its assets in common stocks of U.S. companies that the sub-advisor, Sands Capital Management, LLC, believes have above-average potential for revenue or earnings growth.  This is a non-fundamental investment policy that the Fund can change upon 60 days’ prior notice to shareholders.  The Fund emphasizes investments in large capitalization growth companies.  The weighted-average market capitalization of these companies is generally in excess of $25 billion, and the Fund generally does not invest in companies that have a market capitalization of less than $2 billion.  The Fund will typically own between 25 and 35 companies.
 
The Fund is non-diversified and invests a significant percentage of its assets in the securities of a single company or in the securities of a smaller number of companies than a diversified fund. The Fund may invest a high percentage of its assets in specific sectors of the market in order to achieve a potentially greater investment return.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.
 
•
Large-Cap Risk: Large-cap companies may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.
 
Growth-Investing Risk:  Growth-oriented funds may underperform when value investing is in favor, and growth stocks may be more volatile than other stocks because they are more sensitive to investor perceptions of the issuing company’s growth of earnings potential.
 
Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.
 
Non-Diversification Risk: The Fund is non-diversified, which means that it may invest a greater percentage of its assets than a diversified mutual fund in the securities of a limited number of issuers. The use of a non-diversified investment strategy may increase the volatility of the Fund’s investment performance, as the Fund may be more susceptible to risks associated with a single economic, political or regulatory event.
 
Sector Focus Risk: A fund that focuses its investments in the securities of a particular market sector is subject to the risk that adverse circumstances will have a greater impact on the fund than a fund that does not focus its investments in a particular sector.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus An underlying fund may be non-diversified, which means that it may invest a greater percentage of its assets than a diversified mutual fund in the securities of a limited number of issuers. The use of a non-diversified investment strategy may increase the volatility of an underlying fund’s investment performance, as an underlying fund may be more susceptible to risks associated with a single economic, political, or regulatory event.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Russell 1000® Growth Index.  The bar chart does not reflect any sales charges, which would reduce your return.  The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Russell 1000® Growth Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Sands Capital Select Growth Fund — Class Z Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return. 
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: First Quarter 2012 23.75%
 
Worst Quarter: Fourth Quarter 2018 (17.93)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes.  Your actual after-tax returns may differ from those shown and depend on your tax situation. 
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. 
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class Z shares only.  The after-tax returns for other classes of shares offered by the Fund will differ from the Class Z shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes.  Your actual after-tax returns may differ from those shown and depend on your tax situation.  The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.  The after-tax returns shown in the table are for Class Z shares only.  The after-tax returns for other classes of shares offered by the Fund will differ from the Class Z shares' after-tax returns.
 
The inception date of Class A shares and Class C shares was November 15, 2010. Class A and Class C shares' performance was calculated using the historical performance of Class Z shares for the periods prior to November 15, 2010. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Class A and Class C shares.
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND | Russell 1000® Growth Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell 1000® Growth Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 36.39%
5 Years rr_AverageAnnualReturnYear05 14.63%
10 Years rr_AverageAnnualReturnYear10 15.22%
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSNAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [28]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.90% [29]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.04%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.29%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.45% [30]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [31]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.45% [30],[31]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 640
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 936
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,253
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,148
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 25.63%
5 Years rr_AverageAnnualReturnYear05 9.88%
10 Years rr_AverageAnnualReturnYear10 14.29%
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSNCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [28]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.90% [29]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.04%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.27%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.31%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.22% [30]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [31]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.20% [30],[31]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 323
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 692
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,188
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,553
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 223
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 692
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,188
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,553
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 30.29%
5 Years rr_AverageAnnualReturnYear05 10.35%
10 Years rr_AverageAnnualReturnYear10 14.12%
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol CFSIX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [28]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.90% [29]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.04%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.24%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.28%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.19% [30]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [31]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.19% [30],[31],[32]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 121
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 378
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 654
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,443
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 32.63%
5 Years rr_AverageAnnualReturnYear05 11.50%
10 Years rr_AverageAnnualReturnYear10 15.26%
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND | Class Z  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol PTSGX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [28]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.90% [29]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.24%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.04%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.31%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.35%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.50% [30]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.06%) [31]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.44% [30],[31]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 147
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 468
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 813
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,785
Annual Return 2010 rr_AnnualReturn2010 25.13%
Annual Return 2011 rr_AnnualReturn2011 1.80%
Annual Return 2012 rr_AnnualReturn2012 22.87%
Annual Return 2013 rr_AnnualReturn2013 40.60%
Annual Return 2014 rr_AnnualReturn2014 7.90%
Annual Return 2015 rr_AnnualReturn2015 (0.02%)
Annual Return 2016 rr_AnnualReturn2016 (9.05%)
Annual Return 2017 rr_AnnualReturn2017 34.22%
Annual Return 2018 rr_AnnualReturn2018 5.33%
Annual Return 2019 rr_AnnualReturn2019 32.34%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 23.75%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.93%)
Label rr_AverageAnnualReturnLabel Class Z Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 32.34%
5 Years rr_AverageAnnualReturnYear05 11.21%
10 Years rr_AverageAnnualReturnYear10 14.98%
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND | Class Z | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Z Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 26.94%
5 Years rr_AverageAnnualReturnYear05 6.75%
10 Years rr_AverageAnnualReturnYear10 12.50%
TOUCHSTONE SANDS CAPITAL SELECT GROWTH FUND | Class Z | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Z Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 22.67%
5 Years rr_AverageAnnualReturnYear05 8.04%
10 Years rr_AverageAnnualReturnYear10 12.16%
Touchstone Small Cap Fund  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE SMALL CAP FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Small Cap Fund (the “Fund”) seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 17% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 17.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal conditions, at least 80% of its net assets (including borrowings for investment purposes) in common stocks of small capitalization U.S. companies.  This is a non-fundamental policy that the Fund can change upon 60 days’ prior notice to shareholders.  For purposes of the Fund, a small capitalization company has a market capitalization within the range of market capitalization represented in the Russell 2000® Index (between $13 million to $8.3 billion as of December 31, 2019), the S&P SmallCap 600 Index (between $98 million to $6.8 billion as of December 31, 2019), or the Dow Jones U.S. Small Cap Total Stock Market Index (between $29 million to $7.8 billion as of December 31, 2019) at the time of purchase.  The size of the companies in these indices will change with market conditions.

The sub-advisor, London Company of Virginia d/b/a The London Company (“The London Company”), seeks to purchase financially stable small-cap companies that The London Company believes are consistently generating high returns on unleveraged operating capital, run by shareholder-oriented management, and trading at a discount to their respective market prices.  Guiding principles of The London Company’s small-cap philosophy include: (1) a focus on cash return on tangible capital, not earnings per share, (2) the value of a company is determined by cash inflows and outflows discounted by the optimal cost of capital, (3) a focused investment approach (not diversifying excessively) is essential to good investment results, and (4) low turnover and tax sensitivity enhances real returns.
 
The Fund will hold securities of approximately 30 to 40 companies.  The London Company invests for the long term and attempts to minimize turnover in an effort to reduce transaction costs and taxes.
 
The Fund is non-diversified and invests a significant percentage of its assets in the securities of one company or in the securities of a smaller number of companies than a diversified fund. The Fund may invest a high percentage of its assets in specific sectors of the market in order to achieve a potentially greater investment return.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.
 
•
Small-Cap Risk: Stocks of smaller companies may be subject to more abrupt or erratic market movements than stocks of larger, more established companies. Small companies may have limited product lines or financial resources and may be dependent upon a small or inexperienced management group.
 
Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Non-Diversification Risk: The Fund is non-diversified, which means that it may invest a greater percentage of its assets than a diversified mutual fund in the securities of a limited number of issuers. The use of a non-diversified investment strategy may increase the volatility of the Fund’s investment performance, as the Fund may be more susceptible to risks associated with a single economic, political or regulatory event.

Sector Focus Risk: A fund that focuses its investments in the securities of a particular market sector is subject to the risk that adverse circumstances will have a greater impact on the fund than a fund that does not focus its investments in a particular sector.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus The Fund is non-diversified, which means that it may invest a greater percentage of its assets than a diversified mutual fund in the securities of a limited number of issuers. The use of a non-diversified investment strategy may increase the volatility of the Fund’s investment performance, as the Fund may be more susceptible to risks associated with a single economic, political or regulatory event.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years and ten years compare with the Russell 2000® Index.  The bar chart does not reflect any sales charges, which would reduce your return.  The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years and ten years compare with the Russell 2000® Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Small Cap Fund — Class A Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return. 
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: Fourth Quarter 2011 16.94%
 
Worst Quarter: Fourth Quarter 2018 (17.23)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Touchstone Small Cap Fund | Russell 2000® Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell 2000® Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 25.52%
5 Years rr_AverageAnnualReturnYear05 8.23%
10 Years rr_AverageAnnualReturnYear10 11.83%
Touchstone Small Cap Fund | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSFAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [33]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.05%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.86%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.91%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.02% [34]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.72%) [35]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.30% [34],[35],[36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 626
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,036
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,470
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,676
Annual Return 2010 rr_AnnualReturn2010 21.59%
Annual Return 2011 rr_AnnualReturn2011 6.10%
Annual Return 2012 rr_AnnualReturn2012 19.96%
Annual Return 2013 rr_AnnualReturn2013 33.09%
Annual Return 2014 rr_AnnualReturn2014 (1.75%)
Annual Return 2015 rr_AnnualReturn2015 (7.30%)
Annual Return 2016 rr_AnnualReturn2016 11.18%
Annual Return 2017 rr_AnnualReturn2017 5.94%
Annual Return 2018 rr_AnnualReturn2018 (10.20%)
Annual Return 2019 rr_AnnualReturn2019 26.46%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2011
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.94%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.32%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 20.10%
5 Years rr_AverageAnnualReturnYear05 3.17%
10 Years rr_AverageAnnualReturnYear10 8.99%
Touchstone Small Cap Fund | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 17.67%
5 Years rr_AverageAnnualReturnYear05 0.05%
10 Years rr_AverageAnnualReturnYear10 7.00%
Touchstone Small Cap Fund | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 13.62%
5 Years rr_AverageAnnualReturnYear05 2.09%
10 Years rr_AverageAnnualReturnYear10 7.13%
Touchstone Small Cap Fund | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSFCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [33]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.05%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.74%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.79%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.65% [34]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.60%) [35]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.05% [34],[35],[36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 308
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 767
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,352
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,939
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 208
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 767
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,352
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,939
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 24.51%
5 Years rr_AverageAnnualReturnYear05 3.61%
10 Years rr_AverageAnnualReturnYear10 8.82%
Touchstone Small Cap Fund | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSFYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [33]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.05%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.41%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.46%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.32% [34]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.27%) [35]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.05% [34],[35],[36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 107
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 392
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 698
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,567
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 26.81%
5 Years rr_AverageAnnualReturnYear05 4.66%
10 Years rr_AverageAnnualReturnYear10 9.93%
Touchstone Small Cap Fund | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSFIX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [33]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Component1 Other Expenses rr_Component1OtherExpensesOverAssets 0.05%
Component2 Other Expenses rr_Component2OtherExpensesOverAssets 0.30%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.35%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.21% [34]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.24%) [35]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.97% [34],[35],[36]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 99
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 360
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 642
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,445
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 26.81%
5 Years rr_AverageAnnualReturnYear05 4.75%
10 Years rr_AverageAnnualReturnYear10 10.04%
TOUCHSTONE SMALL CAP VALUE FUND  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE SMALL CAP VALUE FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Small Cap Value Fund (the “Fund”) seeks long-term capital growth.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 28.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal market conditions, at least 80% of its assets in common stocks of companies with small market capitalizations.  This is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders.  For purposes of the Fund, a small capitalization company has a market capitalization at the time of purchase within the range represented in the Russell 2000® Value Index (between approximately $25 million to $6.8 billion as of December 31, 2019) at the time of purchase. The market capitalization range of the Russell 2000® Value Index will change with market conditions. The Fund will hold approximately 80 to 115 securities.

The Fund's sub-advisor, LMCG Investments, LLC ("LMCG"), employs a fundamental investment process which seeks to identify companies which it believes are selling at a discount to their intrinsic value. In evaluating and selecting potential investments for the Fund, LMCG completes in-depth research and analysis on the securities in the investable universe in an effort to identify leading companies selling at attractive valuations. The research and analysis include an examination of financial statements and assessments of the management team, the company’s competitive strategy and its current market position. The Fund may invest in other investment companies in pursuing its strategy.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency.  As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.
 
•
Small-Cap Risk: Stocks of smaller companies may be subject to more abrupt or erratic market movements than stocks of larger, more established companies. Small companies may have limited product lines or financial resources and may be dependent upon a small or inexperienced management group.
 
Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.

Value Investing Risk: Value investing presents the risk that the Fund’s security holdings may never reach their full intrinsic value because the market fails to recognize what the portfolio managers consider the true business value or because the portfolio managers have misjudged those values.

Other Investment Companies Risk: The Fund’s investments in other investment companies will be subject to substantially the same risks as those associated with the direct ownership of the securities comprising the portfolios of such investment companies, and the value of the Fund's investment will fluctuate in response to the performance of such portfolios. In addition, if the Fund acquires shares of investment companies, shareholders of the Fund will bear their proportionate share of the fees and expenses of the Fund and, indirectly, the fees and expenses of the investment companies.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Russell 2000® Value Index.  The bar chart does not reflect any sales charges, which would reduce your return.  The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.

On July 1, 2016, the Fund changed its sub-advisor. Performance presented prior to such date should not be attributed to the Fund's current sub-advisor, LMCG. The Fund's performance shown below might have differed materially if LMCG had managed the Fund pursuant to its current strategies prior to July 1, 2016.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Russell 2000® Value Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Small Cap Value Fund — Class A Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: Fourth Quarter 2010 16.95%
 
Worst Quarter: Fourth Quarter 2018 (19.22)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A shares' after-tax returns.
 
The inception date of Class A shares, Class C shares, Class Y shares, and Institutional Class shares was March 1, 2011. On June 10, 2011, Class Z shares were converted to Class A shares. Class A, Class C, Class Y and Institutional Class shares' performance was calculated using the historical performance of Class Z shares for the periods prior to March 1, 2011. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Class A, Class C, Class Y and Institutional Class shares.
TOUCHSTONE SMALL CAP VALUE FUND | Russell 2000® Value Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Russell 2000® Value Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 22.39%
5 Years rr_AverageAnnualReturnYear05 6.99%
10 Years rr_AverageAnnualReturnYear10 10.56%
TOUCHSTONE SMALL CAP VALUE FUND | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TVOAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [37]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.58%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.69% [38]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.30%) [39]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.39% [38],[39]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 634
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 978
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,345
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,374
Annual Return 2010 rr_AnnualReturn2010 25.82%
Annual Return 2011 rr_AnnualReturn2011 (6.26%)
Annual Return 2012 rr_AnnualReturn2012 21.84%
Annual Return 2013 rr_AnnualReturn2013 32.27%
Annual Return 2014 rr_AnnualReturn2014 2.09%
Annual Return 2015 rr_AnnualReturn2015 (13.92%)
Annual Return 2016 rr_AnnualReturn2016 27.84%
Annual Return 2017 rr_AnnualReturn2017 7.21%
Annual Return 2018 rr_AnnualReturn2018 (15.76%)
Annual Return 2019 rr_AnnualReturn2019 24.48%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2010
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.95%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.22%)
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 18.26%
5 Years rr_AverageAnnualReturnYear05 3.12%
10 Years rr_AverageAnnualReturnYear10 8.51%
TOUCHSTONE SMALL CAP VALUE FUND | Class A | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 18.20%
5 Years rr_AverageAnnualReturnYear05 2.45%
10 Years rr_AverageAnnualReturnYear10 7.92%
TOUCHSTONE SMALL CAP VALUE FUND | Class A | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class A Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 10.86%
5 Years rr_AverageAnnualReturnYear05 2.30%
10 Years rr_AverageAnnualReturnYear10 6.87%
TOUCHSTONE SMALL CAP VALUE FUND | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TVOCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [37]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.72%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 3.58% [38]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.44%) [39]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.14% [38],[39]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 317
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 964
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,732
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,751
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 217
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 964
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,732
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,751
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 22.52%
5 Years rr_AverageAnnualReturnYear05 3.56%
10 Years rr_AverageAnnualReturnYear10 8.34%
TOUCHSTONE SMALL CAP VALUE FUND | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TVOYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [37]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.45%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.31% [38]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.17%) [39]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.14% [38],[39]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 116
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 398
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 702
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,564
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 24.76%
5 Years rr_AverageAnnualReturnYear05 4.61%
10 Years rr_AverageAnnualReturnYear10 9.41%
TOUCHSTONE SMALL CAP VALUE FUND | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TVOIX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [37]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.85%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.32%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.18% [38]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.19%) [39]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.99% [38],[39]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 356
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 631
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,415
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 24.96%
5 Years rr_AverageAnnualReturnYear05 4.76%
10 Years rr_AverageAnnualReturnYear10 9.54%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND  
Prospectus: rr_ProspectusTable  
Risk/Return [Heading] rr_RiskReturnHeading TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading The Fund’s Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Touchstone Ultra Short Duration Fixed Income Fund (the “Fund”) seeks maximum total return consistent with the preservation of capital.
Expense [Heading] rr_ExpenseHeading The Fund’s Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.  More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information ("SAI") on page 93 and 103, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus. If you purchase Class Y shares through a broker acting solely as an agent on behalf of its customers, that broker may charge you a commission. Such commissions, if any, are not charged by the Fund and are not reflected in the fee table or expense example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination January 29, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover. 
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as brokerage commissions, when it buys and sells securities (or “turns over” its portfolio).  A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account.  These costs, which are not reflected in total annual Fund operating expenses or in the example, affect the Fund’s performance.  During the most recent fiscal year, the Fund’s portfolio turnover rate was 91% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 91.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods.  The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year.  Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading The Fund’s Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests, under normal market conditions, at least 80% of its assets in fixed-income securities.  This is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders. The Fund invests in a diversified portfolio of securities of different maturities including U.S. Treasury securities, U.S. government agency securities, securities of U.S. government-sponsored enterprises, corporate bonds (including those of foreign issuers), mortgage-backed securities, commercial mortgage-backed securities, asset-backed securities, municipal bonds and cash equivalent securities including repurchase agreements, commercial paper and variable rate demand notes.
 
The Fund invests only in investment-grade debt securities.  Investment-grade debt securities are those having a rating of BBB-/Baa3 or higher from a nationally recognized statistical rating organization ("NRSRO") or, if a rating is not available, deemed to be of comparable quality by the sub-advisor, Fort Washington Investment Advisors, Inc. ("Fort Washington"). The Fund's investment policies are based on credit ratings at the time of purchase.

In selecting investments for the Fund, Fort Washington chooses fixed-income securities that it believes are attractively priced relative to the market or to similar instruments.  In addition, Fort Washington considers the “effective duration” of the Fund’s entire portfolio.  Effective duration is a measure of a security’s price volatility or the risk associated with changes in interest rates.  While the Fund may invest in securities with any maturity or duration, Fort Washington seeks to maintain an effective duration for the Fund of one year or less under normal market conditions.  

The Fund may engage in frequent and active trading of securities as a part of its principal investment strategy.
Risk [Heading] rr_RiskHeading The Fund’s Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the FDIC or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal.  You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Fixed-Income Risk: The market value of the Fund’s fixed-income securities responds to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and increase in value if interest rates fall. Normally, the longer the maturity or duration of the fixed-income securities the Fund owns, the more sensitive the value of the Fund’s shares will be to changes in interest rates.

•
Asset-Backed Securities Risk: Asset-backed securities are fixed-income securities backed by other assets such as credit card, automobile or consumer loan receivables, retail installment loans, or participations in pools of leases. The values of these securities are sensitive to changes in the credit quality of the underlying collateral, the credit strength of any credit enhancement feature, changes in interest rates, and, at times, the financial condition of the issuer.

•
Credit Risk: The fixed-income securities in the Fund’s portfolio are subject to the possibility that a deterioration, whether sudden or gradual, in the financial condition of an issuer, or a deterioration in general economic conditions, could cause an issuer to fail to make timely payments of principal or interest, when due. This may cause the issuer’s securities to decline in value.
 
•
Interest Rate Risk: In general, when interest rates rise, the prices of debt securities fall, and when interest rates fall, the prices of debt securities rise. The price volatility of a debt security also depends on its maturity. Longer-term securities are generally more volatile, so the longer the average maturity or duration of these securities, the greater their price risk. Recent and potential future changes in government policy may affect interest rates.

•
Investment-Grade Debt Securities Risk: Investment-grade debt securities may be downgraded by a NRSRO to below-investment-grade status, which would increase the risk of holding these securities. Investment-grade debt securities rated in the lowest rating category by a NRSRO involve a higher degree of risk than fixed-income securities with higher credit ratings.

•
Mortgage-Backed Securities Risk:  Mortgage-backed securities are fixed-income securities representing an interest in a pool of underlying mortgage loans. Mortgage-backed securities are sensitive to changes in interest rates, but may respond to these changes differently from other fixed-income securities due to the possibility of prepayment of the underlying mortgage loans. Mortgage-backed securities may fluctuate in price based on deterioration in the value of the collateral underlying the pool of mortgage loans, which may result in the collateral being worth less than the remaining principal amount owed on the mortgages in the pool.

•
Prepayment Risk: The risk that a debt security may be paid off and proceeds invested earlier than anticipated. Prepayment impacts both the interest rate sensitivity of the underlying asset, such as an asset-backed or mortgage-backed security and its cash flow projections. Therefore, prepayment risk may make it difficult to calculate the average duration of the Fund’s asset- or mortgage-backed securities which in turn would make it difficult to assess the interest rate risk of the Fund.

Management Risk: In managing the Fund’s portfolio, the Advisor engages one or more sub-advisors to make investment decisions for a portion of or the entire portfolio. There is a risk that the Advisor may be unable to identify and retain sub-advisors who achieve superior investment returns relative to other similar sub-advisors.
 
Foreign Securities Risk: Investing in foreign securities poses additional risks since political and economic events unique in a country or region will affect those markets and their issuers, while such events may not necessarily affect the U.S. economy or issuers located in the United States. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund's investments. There are also risks associated with foreign accounting standards, government regulation, market information, and clearance and settlement procedures. Foreign markets may be less liquid and more volatile than U.S. markets and offer less protection to investors.

Municipal Securities Risk:  The value of municipal securities may be affected by uncertainties in the municipal market related to legislation or litigation involving the taxation of municipal securities or the rights of municipal securities holders in the event of bankruptcy. In addition, a downturn in the national economy may negatively impact the economic performance of issuers of municipal securities, and may increase the likelihood that issuers of securities in which the Fund may invest may be unable to meet their obligations. Also, some municipal obligations may be backed by a letter of credit issued by a bank or other financial institution. Adverse developments affecting banks or other financial institutions could have a negative effect on the value of the Fund’s portfolio securities.
 
Portfolio Turnover Risk: Frequent and active trading may result in greater expenses to the Fund, which may lower the Fund's performance and may result in the realization of substantial capital gains, including net short-term capital gains. As a result, high portfolio turnover may reduce the Fund's returns.
 
Repurchase Agreement Risk: Under all repurchase agreements entered into by the Fund, the Fund’s custodian or its agent must take possession of the underlying collateral.  However, if the counterparty defaults, the Fund could realize a loss on the sale of the underlying security to the extent that the proceeds of sale, including accrued interest, are less than the resale price provided in the agreement including interest.  In addition, even though the Bankruptcy Code provides protection for most repurchase agreements, if the seller should be involved in bankruptcy or insolvency proceedings, the Fund may incur delay and costs in selling the underlying security or may suffer a loss of principal and interest if the Fund is treated as an unsecured creditor and is required to return the underlying security to the seller’s estate.  Repurchase agreements are considered loans by the Fund.
 
U.S. Government Agencies Securities Risk: Certain U.S. government agency securities are backed by the right of the issuer to borrow from the U.S. Treasury while others are supported only by the credit of the issuer or instrumentality.  While the U.S. government is able to provide financial support to U.S. government-sponsored agencies or instrumentalities, no assurance can be given that it will always do so.
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money on your investment in the Fund and the Fund could also return less than other investments.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading The Fund’s Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the ICE BofA Merrill Lynch 3-Month U.S. Treasury Bill Index and ICE BofA Merrill Lynch 1-Year U.S. Treasury Note Index. The bar chart does not reflect any sales charges, which would reduce your return.  The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.  More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the ICE BofA Merrill Lynch 3-Month U.S. Treasury Bill Index and ICE BofA Merrill Lynch 1-Year U.S. Treasury Note Index.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1.800.543.0407
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress TouchstoneInvestments.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Touchstone Ultra Short Duration Fixed Income Fund — Class Z Total Return as of December 31
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads The bar chart does not reflect any sales charges, which would reduce your return.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: Second Quarter 2019 0.97%
 
Worst Quarter: Second Quarter 2013 (0.07)%
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2019
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes.  Your actual after-tax returns may differ from those shown and depend on your tax situation. 
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns shown in the table are for Class Z shares only.  The after-tax returns for other classes of shares offered by the Fund will differ from the Class Z shares' after-tax returns.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes.  Your actual after-tax returns may differ from those shown and depend on your tax situation.  The after-tax returns do not apply to shares held in an individual retirement account ("IRA"), 401(k), or other tax-advantaged account.  The after-tax returns shown in the table are for Class Z shares only.  The after-tax returns for other classes of shares offered by the Fund will differ from the Class Z shares' after-tax returns.
 
The inception dates of Class A shares, Class C shares, Class S shares, Class Y shares, and Institutional Class shares were April 12, 2012, April 12, 2012, October 27, 2017, April 12, 2012 and April 12, 2012, respectively. Class A shares, Class C shares, Class Y shares and Institutional Class shares' performance was calculated using the historical performance of Class Z shares for the periods prior to April 12, 2012. Class S shares' performance was calculated using the historical performance of Class Y shares for the periods prior to October 27, 2017. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Class A, Class C, Class S, Class Y and Institutional Class shares.
 
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | ICE BofA Merrill Lynch 3-Month U.S. Treasury Bill Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel BofA Merrill Lynch 3-Month U.S. Treasury Bill Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 2.28%
5 Years rr_AverageAnnualReturnYear05 1.07%
10 Years rr_AverageAnnualReturnYear10 0.58%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | ICE BofA Merrill Lynch 1-Year U.S. Treasury Note Index (reflects no deductions for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel BofA Merrill Lynch 1-Year U.S. Treasury Note Index (reflects no deductions for fees, expenses or taxes)
1 Year rr_AverageAnnualReturnYear01 2.93%
5 Years rr_AverageAnnualReturnYear05 1.25%
10 Years rr_AverageAnnualReturnYear10 0.83%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Class A  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSDAX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [40]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.25%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.30%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.80%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.11%) [41]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.69% [41]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 269
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 440
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 625
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,160
Label rr_AverageAnnualReturnLabel Class A Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 0.99%
5 Years rr_AverageAnnualReturnYear05 1.17%
10 Years rr_AverageAnnualReturnYear10 1.19%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Class C  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSDCX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Redemption Fee rr_RedemptionFee $ (15) [40]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.25%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.71%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.71%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.52%) [41]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.19% [41]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 221
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 488
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 879
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,976
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 121
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 488
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 879
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,976
Label rr_AverageAnnualReturnLabel Class C Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 1.45%
5 Years rr_AverageAnnualReturnYear05 1.08%
10 Years rr_AverageAnnualReturnYear10 0.84%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Class S  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol SSSGX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [40]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.25%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.24%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.99%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [41]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.94% [41]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 96
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 310
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 542
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,208
Label rr_AverageAnnualReturnLabel Class S Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 2.81%
5 Years rr_AverageAnnualReturnYear05 1.33%
10 Years rr_AverageAnnualReturnYear10 1.15%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Class Y  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSYYX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [40]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.25%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.26%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.51%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.07%) [41]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.44% [41]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 45
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 156
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 278
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 634
Label rr_AverageAnnualReturnLabel Class Y Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 3.32%
5 Years rr_AverageAnnualReturnYear05 1.84%
10 Years rr_AverageAnnualReturnYear10 1.59%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Class Z  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSDOX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [40]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.25%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.27%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.77%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [41]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.69% [41]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 70
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 238
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 420
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 947
Annual Return 2010 rr_AnnualReturn2010 1.75%
Annual Return 2011 rr_AnnualReturn2011 1.50%
Annual Return 2012 rr_AnnualReturn2012 1.82%
Annual Return 2013 rr_AnnualReturn2013 0.54%
Annual Return 2014 rr_AnnualReturn2014 0.59%
Annual Return 2015 rr_AnnualReturn2015 0.40%
Annual Return 2016 rr_AnnualReturn2016 1.51%
Annual Return 2017 rr_AnnualReturn2017 1.31%
Annual Return 2018 rr_AnnualReturn2018 1.64%
Annual Return 2019 rr_AnnualReturn2019 3.07%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 0.97%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2013
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.07%)
Label rr_AverageAnnualReturnLabel Class Z Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 3.07%
5 Years rr_AverageAnnualReturnYear05 1.58%
10 Years rr_AverageAnnualReturnYear10 1.41%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Class Z | After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Z Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 2.03%
5 Years rr_AverageAnnualReturnYear05 0.83%
10 Years rr_AverageAnnualReturnYear10 0.68%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Class Z | After Taxes on Distributions and Sales  
Prospectus: rr_ProspectusTable  
Label rr_AverageAnnualReturnLabel Class Z Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 1.81%
5 Years rr_AverageAnnualReturnYear05 0.88%
10 Years rr_AverageAnnualReturnYear10 0.77%
TOUCHSTONE ULTRA SHORT DURATION FIXED INCOME FUND | Institutional Class  
Prospectus: rr_ProspectusTable  
Trading Symbol dei_TradingSymbol TSDIX
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption Fee rr_RedemptionFee $ (15) [40]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.25%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.46%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.07%) [41]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.39% [41]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 40
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 141
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 251
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 572
Label rr_AverageAnnualReturnLabel Institutional Class Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 3.38%
5 Years rr_AverageAnnualReturnYear05 1.87%
10 Years rr_AverageAnnualReturnYear10 1.62%
[1] *The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[2] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 0.90%, 1.65%, 0.65%, and 0.57% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021 , but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[3] *The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[4] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 0.69% and 0.59% of average daily net assets for Class Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which Touchstone Advisors reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[5] *The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[6] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 0.54% and 0.44% of average daily net assets for Class Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which Touchstone Advisors reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[7] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[8] Total Annual Fund Operating Expenses include Acquired Fund Fees and Expenses and will differ from the ratios of expenses to average net assets that are included in the Fund's annual report for the fiscal year ended September 30, 2019.
[9] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.08%, 1.83%, 0.83%, and 0.73% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[10] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[11] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.05%, 1.80%, 0.80%, and 0.72% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective throughJanuary 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[12] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[13] Total Annual Fund Operating Expenses include Acquired Fund Fees and Expenses and will differ from the ratios of expenses to average net assets that are included in the Fund's annual report for the fiscal year ended September 30, 2019.
[14] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 0.85%, 1.60%, 0.60%, and 0.50% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[15] The Fund changed its benchmarks from the Russell 3000® Value Index and the Dow Jones U.S. Select Dividend Index to the MSCI All Country World ex-USA Index on August 23, 2019, in conjunction with the Fund's name change, change in principal investment strategies and sub-advisor.
[16] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[17] Management Fees have been restated to reflect contractual changes to the Fund's Investment Advisory Agreement effective August 23, 2019.
[18] Total Annual Fund Operating Expenses have been restated to reflect a contractual change in the Fund's Investment Advisory Agreement effective August 23, 2019 and will differ from the ratio of expenses to average net assets that is included in the Fund's annual report for the fiscal year ended September 30, 2019.
[19] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.17%, 1.95%, 0.90%, and 0.89% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[20] Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement will differ from the ratio of net expenses to average net assets that is included in the Fund's annual report for the fiscal year ended September 30, 2019 due to a contractual change in the Fund's expense limitation agreement effective August 23, 2019.
[21] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[22] Management Fees have been restated to reflect contractual changes to the Fund's Investment Advisory Agreement effective June 1, 2019.
[23] Total Annual Fund Operating Expenses have been restated to reflect a contractual change in the Fund's Investment Advisory Agreement effective June 1, 2019 and will differ from the ratio of expenses to average net assets that is included in the Fund's annual report for the fiscal year ended September 30, 2019.
[24] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.21%, 1.96%, 0.96%, 1.21%, and 0.89% of average daily net assets for Classes A, C, Y, Z and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[25] Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement will differ from the ratio of net expenses to average net assets that is included in the Fund's annual report for the fiscal year ended September 30, 2019 due to a contractual change in the Fund's expense limitation agreement effective June 1, 2019.
[26] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[27] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.22%, 1.97%, 0.97%, and 0.84% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[28] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[29] There will be a performance fee adjustment to the base advisory fee if the Fund outperforms or underperforms the Russell 1000® Growth Index by more than 2.50%. See “The Funds’ Management” section of the Fund’s prospectus for additional information.
[30] Total Annual Fund Operating Expenses include Acquired Fund Fees and Expenses and will differ from the ratios of expenses to average net assets that are included in the Fund's annual report for the fiscal year ended September 30, 2019.
[31] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the "Trust") have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit “Other Expenses” to 0.25% for each class of shares. Other expenses include all operating expenses of the Fund except for investment advisory fees, performance fees, shareholder servicing fees, distribution fees (12b–1) and any expenses excluded in the expense limitation agreement. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which Touchstone Advisors reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause Other Expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund's current expense limitation.
[32] Expenses shown above do not reflect Touchstone Advisors' recoupment of previously waived and/or reimbursed expenses and will differ from the ratio of expenses to average net assets that is included in the Fund’s annual report for the fiscal year ended September 30, 2019.
[33] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[34] Total Annual Fund Operating Expenses include Acquired Fund Fees and Expenses and will differ from the ratios of expenses to average net assets that is included in the Fund’s annual report for the fiscal year ended September 30, 2019.
[35] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.24%, 1.99%, 0.99%, and 0.91% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[36] Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement will differ from the ratio of net expenses to average net assets that is included in the Fund's annual report for the fiscal year ended September 30, 2019 due to a contractual change in the Fund's expense limitation agreement effective June 1, 2019.
[37] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[38] Total Annual Fund Operating Expenses include Acquired Fund Fees and Expenses and will differ from the ratios of expenses to average net assets that is included in the Fund’s annual report for the fiscal year ended September 30, 2019.
[39] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.38%, 2.13%, 1.13%, and 0.98% of average daily net assets for Classes A, C, Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Advisor reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.
[40] The wire redemption fee is capped at $15. In addition, the wire redemption fee may not exceed two percent (2%) of the amount being redeemed.
[41] Touchstone Advisors, Inc. (the "Advisor" or "Touchstone Advisors") and Touchstone Funds Group Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund's liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses,” if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 0.69%, 1.19%, 0.94%, 0.44%, 0.69%, and 0.39% of average daily net assets for Classes A, C, S, Y, Z and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 2021, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which Touchstone Advisors reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Advisor only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund's current expense limitation.