Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	TOUCHSTONE FUNDS GROUP TRUST
Prospectus Date	rr_ProspectusDate	Jan. 27, 2023
Touchstone International ESG Equity 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 International ESG Equity 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 International ESG Equity Fund (the “Fund”) seeks long-term growth of capital.
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.
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, </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 32% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	32.00%
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 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-adviser, 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, 2022, 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	<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.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.•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 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.•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 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.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.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	<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="color:#000000;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 MSCI All Country World ex-USA 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-adviser. Performance presented prior to such date should not be attributed to the Fund’s current sub-adviser, 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	<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 ten years compare with the MSCI All Country World ex-USA 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 International ESG Equity 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 202017.65%Worst Quarter:1st Quarter 2020(23.44)%
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.The inception date of Institutional Class shares was August 23, 2019. Institutional Class shares’ performance was calculated using the historical performance of Class A shares for the periods prior to August 23, 2019. Performance for these periods has been restated to reflect the impact of the fees and expenses applicable to Institutional Class shares.
Touchstone International ESG Equity Fund | Class A
Risk Return Abstract	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.00%
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	0.65%
Distribution and/or Shareholder Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Total Other Expenses	rr_OtherExpensesOverAssets	0.69%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.59%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.42%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.17%	[2]
1 Year	rr_ExpenseExampleYear01	$ 613
3 Years	rr_ExpenseExampleYear03	938
5 Years	rr_ExpenseExampleYear05	1,285
10 Years	rr_ExpenseExampleYear10	$ 2,261
2013	rr_AnnualReturn2013	21.68%
2014	rr_AnnualReturn2014	11.34%
2015	rr_AnnualReturn2015	(10.50%)
2016	rr_AnnualReturn2016	17.42%
2017	rr_AnnualReturn2017	12.43%
2018	rr_AnnualReturn2018	(9.45%)
2019	rr_AnnualReturn2019	23.21%
2020	rr_AnnualReturn2020	12.70%
2021	rr_AnnualReturn2021	10.74%
2022	rr_AnnualReturn2022	(20.80%)
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:10.02pt;">Best Quarter:</span>
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	17.65%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:10.02pt;">Worst Quarter:</span>
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(23.44%)
1 Year	rr_AverageAnnualReturnYear01	(24.75%)
5 Years	rr_AverageAnnualReturnYear05	0.77%
10 Years	rr_AverageAnnualReturnYear10	5.22%
Touchstone International ESG Equity 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	0.65%
Distribution and/or Shareholder Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Total Other Expenses	rr_OtherExpensesOverAssets	1.07%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	2.72%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.77%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	1.95%	[2]
1 Year	rr_ExpenseExampleYear01	$ 298
3 Years	rr_ExpenseExampleYear03	771
5 Years	rr_ExpenseExampleYear05	1,371
10 Years	rr_ExpenseExampleYear10	2,995
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	198
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	771
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,371
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 2,995
1 Year	rr_AverageAnnualReturnYear01	(22.20%)
5 Years	rr_AverageAnnualReturnYear05	1.24%
10 Years	rr_AverageAnnualReturnYear10	5.22%
Touchstone International ESG Equity 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	0.65%
Distribution and/or Shareholder Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Total Other Expenses	rr_OtherExpensesOverAssets	0.65%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.30%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.40%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.90%	[2]
1 Year	rr_ExpenseExampleYear01	$ 92
3 Years	rr_ExpenseExampleYear03	373
5 Years	rr_ExpenseExampleYear05	675
10 Years	rr_ExpenseExampleYear10	$ 1,533
1 Year	rr_AverageAnnualReturnYear01	(20.49%)
5 Years	rr_AverageAnnualReturnYear05	2.28%
10 Years	rr_AverageAnnualReturnYear10	6.15%
Touchstone International ESG Equity 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	0.65%
Distribution and/or Shareholder Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Total Other Expenses	rr_OtherExpensesOverAssets	0.53%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.18%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.29%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.89%	[2]
1 Year	rr_ExpenseExampleYear01	$ 91
3 Years	rr_ExpenseExampleYear03	346
5 Years	rr_ExpenseExampleYear05	621
10 Years	rr_ExpenseExampleYear10	$ 1,406
1 Year	rr_AverageAnnualReturnYear01	(20.50%)
5 Years	rr_AverageAnnualReturnYear05	2.29%
10 Years	rr_AverageAnnualReturnYear10	6.16%
Touchstone International ESG Equity Fund | Return After Taxes on Distributions | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(24.97%)
5 Years	rr_AverageAnnualReturnYear05	(1.04%)
10 Years	rr_AverageAnnualReturnYear10	3.57%
Touchstone International ESG Equity Fund | Return After Taxes on Distributions and Sale of Shares | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(14.18%)
5 Years	rr_AverageAnnualReturnYear05	0.72%
10 Years	rr_AverageAnnualReturnYear10	4.10%
Touchstone International ESG Equity Fund | MSCI All Country World ex-USA Index (reflects no deductions for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(16.00%)
5 Years	rr_AverageAnnualReturnYear05	0.88%
10 Years	rr_AverageAnnualReturnYear10	3.80%

[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 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, 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 Adviserreduced 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.