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Risk Return Abstract rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName TOUCHSTONE FUNDS GROUP TRUST
Prospectus Date rr_ProspectusDate Jan. 27, 2023
Touchstone Ares Credit Opportunities Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading <span style="color:#FFFFFF;font-family:Arial;font-size:14pt;margin-left:17pt;text-transform:uppercase;">Touchstone Ares Credit Opportunities Fund Summary</span>
Objective [Heading] rr_ObjectiveHeading <span style="font-family:Arial;font-size:12pt;font-weight:bold;text-decoration:underline;">The Fund’s Investment Goal</span>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Touchstone Ares Credit Opportunities Fund (formerly, Touchstone Credit Opportunities Fund) (the “Fund”) seeks absolute total return, primarily from income and capital appreciation.
Expense [Heading] rr_ExpenseHeading <span style="font-family:Arial;font-size:12pt;font-weight:bold;text-decoration:underline;">The Fund’s Fees and Expenses</span>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. 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 pages 100 and 101, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <span style="font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:0.0pt;">Shareholder Fees (fees paid directly from your investment)</span>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <span style="font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:0.0pt;">Annual Fund Operating Expenses (expenses that you pay each year as a </span><span style="font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:10pt;">percentage of the value of your investment)</span>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination <span style="font-family:Times New Roman;font-size:9pt;font-style:italic;">January 29, 2024</span>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <span style="font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0%;">Portfolio Turnover. </span>
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 72% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 72.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts <span style="font-family:Times New Roman;font-size:10pt;"> 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 </span><span style="font-family:Times New Roman;font-size:10pt;">$50,000</span><span style="font-family:Times New Roman;font-size:10pt;">, respectively, in Touchstone funds.</span>
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading <span style="font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0%;">Example. </span>
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 by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <span style="font-family:Arial;font-size:10.02pt;font-weight:bold;">Assuming Redemption at End of Period</span>
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption <span style="font-family:Arial;font-size:10.02pt;font-weight:bold;">Assuming</span><span style="font-family:Arial;font-size:10.02pt;font-weight:bold;">No Redemption</span>
Strategy [Heading] rr_StrategyHeading <span style="font-family:Arial;font-size:12pt;font-weight:bold;text-decoration:underline;">The Fund’s Principal Investment Strategies</span>
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 S&P Global Ratings (“S&P”)) or, if unrated, deemed by the Fund’s sub-adviser, 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 <span style="font-family:Arial;font-size:12pt;font-weight:bold;text-decoration:underline;">The Fund’s Principal Risks</span>
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 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. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates that incorporates a security’s yield, coupon, final maturity, and call features, among other characteristics. The longer a fixed-income security’s duration, the more sensitive it will be to changes in interest rates. Maturity, on the other hand, is the date on which a fixed-income security becomes due for payment of principal. 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.•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 Adviser engages one or more sub-advisers to make investment decisions for a portion of or the entire portfolio. There is a risk that the Adviser may be unable to identify and retain sub-advisers who achieve superior investment returns relative to other similar sub-advisers.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.•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.•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-adviser is incorrect in its expectation of price fluctuations. Options, whether exchange traded or over-the-counter, may also be illiquid.•Swap Agreements 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.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.Economic and Market Events Risk: Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times, and for varying periods of time, result in unusually high market volatility, which could negatively impact the Fund’s performance and cause the Fund to experience illiquidity, shareholder redemptions, or other potentially adverse effects. Reduced liquidity in credit and fixed-income markets could negatively affect issuers worldwide. Financial institutions could suffer losses as interest rates rise or economic conditions deteriorate. In addition, the Funds' service providers are susceptible to operational and information or cyber security risks that could result in losses to a Fund and its shareholders. Cyber security breaches are either intentional or unintentional events that allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause a Fund or Fund service provider to suffer data corruption or lose operational functionality. A cyber security breach could result in the loss or theft of customer data or funds, loss or theft of proprietary information or corporate data, physical damage to a computer or network system, or costs associated with system repairs, any of which could have a substantial impact on a Fund. Such incidents could affect issuers in which a Fund invests, thereby causing the Fund’s investments to lose value.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, or as a result of irregular and/or unexpected trading activity among retail investors. 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 <span style="font-family:Times New Roman;font-size:10pt;">You could lose money on your investment in the Fund and the Fund could also return less than other investments.</span>
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution <span style="font-family:Times New Roman;font-size:10pt;"> Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the Federal Deposit Insurance Corporation or any other federal government agency.</span>
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus <span style="font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0%;">Non-Diversification Risk:</span><span style="font-family:Times New Roman;font-size:10pt;"> 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.</span>
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <span style="font-family:Arial;font-size:12pt;font-weight:bold;text-decoration:underline;">The Fund’s Performance</span>
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 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 <span style="font-family:Times New Roman;font-size:10pt;margin-left:0%;">The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing </span><span style="font-family:Times New Roman;font-size:10pt;">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 3-Month U.S. Treasury Bill Index.</span>
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone <span style="font-family:Times New Roman;font-size:10pt;">1.800.543.0407</span>
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress <span style="font-family:Times New Roman;font-size:10pt;">TouchstoneInvestments.com</span>
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture <span style="font-family:Times New Roman;font-size:10pt;">Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.</span>
Bar Chart [Heading] rr_BarChartHeading <span style="font-family:Arial;font-size:10pt;font-weight:bold;">Touchstone Ares Credit Opportunities Fund — Class A Shares Total Return as of December 31</span>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads <span style="font-family:Times New Roman;font-size:10pt;"> The bar chart does not reflect any sales charges, which would reduce your return.</span>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Best Quarter:2nd Quarter 202010.90%Worst Quarter:1st Quarter 2020(16.21)%
Performance Table Heading rr_PerformanceTableHeading <span style="font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:0.0pt;">Average Annual Total Returns</span><span style="font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:0.0pt;">For the periods ended December 31, 2022</span>
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads <span style="font-family:Times New Roman;font-size:10pt;"> The performance table reflects any applicable sales charges.</span>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate <span style="font-family:Times New Roman;font-size:10pt;margin-left:0%;">After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment </span><span style="font-family:Times New Roman;font-size:10pt;">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.</span>
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred <span style="font-family:Times New Roman;font-size:10pt;"> The after-tax returns do not apply to shares held in an individual retirement account (“IRA”), 401(k), or other tax-advantaged account.</span>
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown <span style="font-family:Times New Roman;font-size:10pt;"> 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. </span>
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher <span style="font-family:Times New Roman;font-size:10pt;">The Return After Taxes on Distributions and Sale of Fund Shares may be greater </span><span style="font-family:Times New Roman;font-size:10pt;">than other returns for the same period due to a tax benefit of realizing a capital loss on the sale of Fund shares.</span>
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 Return After Taxes on Distributions and Sale of Fund Shares may be greater than other returns for the same period due to a tax benefit of realizing a capital loss on the sale of Fund shares.
Touchstone Ares Credit Opportunities Fund | Class A  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 3.25%
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less) rr_MaximumDeferredSalesChargeOverOther none
Wire Redemption Fee rr_RedemptionFee $ 15 [1]
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Dividend and Interest Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.04%
Other Operating Expenses rr_Component3OtherExpensesOverAssets 0.37%
Total Other Expenses rr_OtherExpensesOverAssets 0.41%
Acquired Fund Fees and Expenses (AFFE) rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.27% [2]
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.19%) [3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.08% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 432
3 Years rr_ExpenseExampleYear03 697
5 Years rr_ExpenseExampleYear05 982
10 Years rr_ExpenseExampleYear10 $ 1,793
2016 rr_AnnualReturn2016 11.44%
2017 rr_AnnualReturn2017 6.35%
2018 rr_AnnualReturn2018 (2.64%)
2019 rr_AnnualReturn2019 14.22%
2020 rr_AnnualReturn2020 4.40%
2021 rr_AnnualReturn2021 9.22%
2022 rr_AnnualReturn2022 (8.66%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel <span style="font-family:Arial;font-size:10.02pt;">Best Quarter:</span>
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 10.90%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel <span style="font-family:Arial;font-size:10.02pt;">Worst Quarter:</span>
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (16.21%)
1 Year rr_AverageAnnualReturnYear01 (11.64%)
5 Years rr_AverageAnnualReturnYear05 1.77%
SinceInception rr_AverageAnnualReturnSinceInception 3.25%
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 31, 2015
Touchstone Ares Credit Opportunities Fund | Class C  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less) rr_MaximumDeferredSalesChargeOverOther 1.00%
Wire Redemption Fee rr_RedemptionFee $ 15 [1]
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Dividend and Interest Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.04%
Other Operating Expenses rr_Component3OtherExpensesOverAssets 0.41%
Total Other Expenses rr_OtherExpensesOverAssets 0.45%
Acquired Fund Fees and Expenses (AFFE) rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.06% [2]
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.58%) [3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.48% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 251
3 Years rr_ExpenseExampleYear03 590
5 Years rr_ExpenseExampleYear05 1,055
10 Years rr_ExpenseExampleYear10 2,344
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 151
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 590
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,055
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,344
1 Year rr_AverageAnnualReturnYear01 (9.87%)
5 Years rr_AverageAnnualReturnYear05 2.33%
SinceInception rr_AverageAnnualReturnSinceInception 3.43%
Touchstone Ares Credit Opportunities Fund | Class Y  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less) rr_MaximumDeferredSalesChargeOverOther none
Wire Redemption Fee rr_RedemptionFee $ 15 [1]
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Dividend and Interest Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.04%
Other Operating Expenses rr_Component3OtherExpensesOverAssets 0.38%
Total Other Expenses rr_OtherExpensesOverAssets 0.42%
Acquired Fund Fees and Expenses (AFFE) rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.03% [2]
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.88% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 90
3 Years rr_ExpenseExampleYear03 313
5 Years rr_ExpenseExampleYear05 554
10 Years rr_ExpenseExampleYear10 $ 1,246
1 Year rr_AverageAnnualReturnYear01 (8.55%)
5 Years rr_AverageAnnualReturnYear05 3.22%
SinceInception rr_AverageAnnualReturnSinceInception 4.32%
Touchstone Ares Credit Opportunities Fund | Institutional Class  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less) rr_MaximumDeferredSalesChargeOverOther none
Wire Redemption Fee rr_RedemptionFee $ 15 [1]
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Dividend and Interest Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.04%
Other Operating Expenses rr_Component3OtherExpensesOverAssets 0.51%
Total Other Expenses rr_OtherExpensesOverAssets 0.55%
Acquired Fund Fees and Expenses (AFFE) rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.16% [2]
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.38%) [3]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.78% [2],[3]
1 Year rr_ExpenseExampleYear01 $ 80
3 Years rr_ExpenseExampleYear03 331
5 Years rr_ExpenseExampleYear05 602
10 Years rr_ExpenseExampleYear10 $ 1,375
1 Year rr_AverageAnnualReturnYear01 (8.39%)
5 Years rr_AverageAnnualReturnYear05 3.31%
SinceInception rr_AverageAnnualReturnSinceInception 4.43%
Touchstone Ares Credit Opportunities Fund | Return After Taxes on Distributions | Class A  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (13.67%)
5 Years rr_AverageAnnualReturnYear05 (0.75%)
SinceInception rr_AverageAnnualReturnSinceInception 0.80%
Touchstone Ares Credit Opportunities Fund | Return After Taxes on Distributions and Sale of Shares | Class A  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (6.87%)
5 Years rr_AverageAnnualReturnYear05 0.31%
SinceInception rr_AverageAnnualReturnSinceInception 1.47%
Touchstone Ares Credit Opportunities Fund | ICE BofA 3-Month U.S. Treasury Bill Index (reflects no deductions for fees, expenses or taxes)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.46%
5 Years rr_AverageAnnualReturnYear05 1.26%
SinceInception rr_AverageAnnualReturnSinceInception 1.03%
[1] Up to $15.
[2] 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 January 27, 2023.
[3] Touchstone Advisors, Inc. (the “Adviser” 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 1.03%, 1.43%, 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, 2024, 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 Adviser reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Adviser 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.