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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 Impact Bond 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 Impact Bond Fund Summary</span>
Objective [Heading] rr_ObjectiveHeading <span style="color:#000000;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 Impact Bond Fund (the “Fund”) seeks current income. Capital appreciation is a secondary goal.
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock Capital appreciation is a secondary goal
Expense [Heading] rr_ExpenseHeading <span style="color:#000000;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. An investor transacting in Class R6 shares, which do not have any front-end sales charge, contingent deferred sales charge, or other asset-based fee for sales or distribution, may be required to pay a commission to a broker for effecting such transactions on an agency basis. Such commissions are not reflected in the table or in the “Example” below.
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 </span><span style="font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:10pt;">each year as a 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, </span><span style="font-family:Times New Roman;font-size:9pt;font-style:italic;">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 19% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 19.00%
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="color:#000000;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="color:#000000;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 net assets (including borrowings for investment purposes) in fixed-income securities that meet certain positive impact criteria. 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, asset-backed securities and taxable and tax-exempt municipal 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 S&P Global Ratings (“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-adviser, 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 (“ESG”) 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. The Fund focuses on governmental programs and companies that seek to achieve positive aggregate societal impacts in up to four specific areas: empowering the individual, community development, environmental responsibility, and sustainable infrastructure. Investments may seek to achieve multiple areas of 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 <span style="color:#000000;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.•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. 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.•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 reinvested 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.•U.S. Government Securities Risk: Certain U.S. government 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. Such securities are generally neither issued nor guaranteed by the U.S. Treasury.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.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.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.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.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.ESG Investing Risk: The Fund’s sub-adviser considers ESG factors that it deems relevant or additive, along with other material factors and analysis, when selecting investments for Fund. The Fund’s ESG criteria may cause the Fund to forgo opportunities to buy certain securities, or forgo opportunities to gain exposure to certain industries, sectors, regions and municipalities. In addition, the Fund may be required to sell a security when it might otherwise be disadvantageous for it to do so.
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>
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 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 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 <span style="color:#000000;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="color:#000000;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 ten years compare with the Bloomberg U.S. Aggregate Bond Index.</span>
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone <span style="color:#000000;font-family:Times New Roman;font-size:10pt;">1.800.543.0407</span>
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress <span style="color:#000000;font-family:Times New Roman;font-size:10pt;">TouchstoneInvestments.com</span>
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture <span style="color:#000000;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 Impact Bond Fund — Class Y Shares Total Return as of December 31</span>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads <span style="color:#000000;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 20203.48%Worst Quarter:1st Quarter 2022(6.05)%
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="color:#000000;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 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. </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 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 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.The inception date of Class R6 shares of the Fund was November 22, 2021 . Class R6 shares’ performance information was calculated using the historical performance of Class Y shares for the periods prior to November 22, 2021. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Class R6 shares.
Touchstone Impact Bond 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 0.26%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Total Other Expenses rr_OtherExpensesOverAssets 0.42%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.93%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.17%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.76% [2]
1 Year rr_ExpenseExampleYear01 $ 400
3 Years rr_ExpenseExampleYear03 595
5 Years rr_ExpenseExampleYear05 807
10 Years rr_ExpenseExampleYear10 $ 1,416
1 Year rr_AverageAnnualReturnYear01 (16.12%)
5 Years rr_AverageAnnualReturnYear05 (1.38%)
10 Years rr_AverageAnnualReturnYear10 0.26%
Touchstone Impact Bond 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 0.26%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Total Other Expenses rr_OtherExpensesOverAssets 0.99%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.25%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.74%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.51% [2]
1 Year rr_ExpenseExampleYear01 $ 254
3 Years rr_ExpenseExampleYear03 632
5 Years rr_ExpenseExampleYear05 1,138
10 Years rr_ExpenseExampleYear10 2,527
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 154
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 632
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,138
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,527
1 Year rr_AverageAnnualReturnYear01 (14.82%)
5 Years rr_AverageAnnualReturnYear05 (1.17%)
10 Years rr_AverageAnnualReturnYear10 0.14%
Touchstone Impact Bond 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 0.26%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Total Other Expenses rr_OtherExpensesOverAssets 0.26%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.52%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.51% [2]
1 Year rr_ExpenseExampleYear01 $ 52
3 Years rr_ExpenseExampleYear03 166
5 Years rr_ExpenseExampleYear05 290
10 Years rr_ExpenseExampleYear10 $ 652
2013 rr_AnnualReturn2013 (2.17%)
2014 rr_AnnualReturn2014 6.67%
2015 rr_AnnualReturn2015 (0.20%)
2016 rr_AnnualReturn2016 2.85%
2017 rr_AnnualReturn2017 3.94%
2018 rr_AnnualReturn2018 0.15%
2019 rr_AnnualReturn2019 7.91%
2020 rr_AnnualReturn2020 6.71%
2021 rr_AnnualReturn2021 (1.01%)
2022 rr_AnnualReturn2022 (13.07%)
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 3.48%
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, 2022
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.05%)
1 Year rr_AverageAnnualReturnYear01 (13.07%)
5 Years rr_AverageAnnualReturnYear05 (0.15%)
10 Years rr_AverageAnnualReturnYear10 1.00%
Touchstone Impact Bond 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 0.26%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Total Other Expenses rr_OtherExpensesOverAssets 0.23%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.49%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.41% [2]
1 Year rr_ExpenseExampleYear01 $ 42
3 Years rr_ExpenseExampleYear03 149
5 Years rr_ExpenseExampleYear05 266
10 Years rr_ExpenseExampleYear10 $ 608
1 Year rr_AverageAnnualReturnYear01 (13.08%)
5 Years rr_AverageAnnualReturnYear05 (0.07%)
10 Years rr_AverageAnnualReturnYear10 1.11%
Touchstone Impact Bond Fund | Class R6  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [3]
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less) rr_MaximumDeferredSalesChargeOverOther none [3]
Wire Redemption Fee rr_RedemptionFee $ 15 [1],[3]
Management Fees rr_ManagementFeesOverAssets 0.26%
Distribution and/or Shareholder Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Total Other Expenses rr_OtherExpensesOverAssets 238.20%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 238.46%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (238.09%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.37% [2]
1 Year rr_ExpenseExampleYear01 $ 38
3 Years rr_ExpenseExampleYear03 12,513
5 Years rr_ExpenseExampleYear05 12,513
10 Years rr_ExpenseExampleYear10 $ 12,513
1 Year rr_AverageAnnualReturnYear01 (12.98%) [4]
5 Years rr_AverageAnnualReturnYear05 (0.12%) [4]
10 Years rr_AverageAnnualReturnYear10 1.02% [4]
Touchstone Impact Bond Fund | Return After Taxes on Distributions | Class Y  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (13.96%)
5 Years rr_AverageAnnualReturnYear05 (1.13%)
10 Years rr_AverageAnnualReturnYear10 (0.13%)
Touchstone Impact Bond Fund | Return After Taxes on Distributions and Sale of Shares | Class Y  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (7.72%)
5 Years rr_AverageAnnualReturnYear05 (0.49%)
10 Years rr_AverageAnnualReturnYear10 0.28%
Touchstone Impact Bond Fund | Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (13.01%)
5 Years rr_AverageAnnualReturnYear05 0.02%
10 Years rr_AverageAnnualReturnYear10 1.06%
[1] Up to $15.
[2] 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 0.76%, 1.51%, 0.51%, 0.41% and 0.37% of average daily net assets for Classes A, C, Y, Institutional Class and Class R6 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.
[3] Class R6 shares commenced operations on November 22, 2021.
[4] Class R6 shares commenced operations on November 22, 2021. An investor transacting in Class R6 shares may be required to pay a commission to a broker for effecting such transactions on an agency basis. Such commissions will not be reflected in the table.