Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	TOUCHSTONE FUNDS GROUP TRUST
Prospectus Date	rr_ProspectusDate	Jan. 27, 2023
Touchstone Anti-Benchmark International Core 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 Anti-Benchmark</span><span style="color:#FFFFFF;font-family:Arial;font-size:20pt;position:relative;text-transform:uppercase;top:1pt;">®</span><span style="color:#FFFFFF;font-family:Arial;font-size:14pt;text-transform:uppercase;"> International Core 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 Anti-Benchmark® International Core Equity Fund (the “Fund”) seeks capital appreciation.
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. More information is available from your financial professional and 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.
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 percentage of the value of </span><span style="font-family:Arial;font-size:10.02pt;font-weight:bold;margin-left:10pt;">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 84% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	84.00%
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>
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 market conditions, at least 80% of its assets in equity securities of non-U.S. issuers. The Fund’s 80% policy is a non-fundamental investment policy that can be changed by the Fund upon 60 days’ prior notice to shareholders. The Fund pursues its objective by seeking to track the total return, before Fund fees and expenses, of the TOBAM Anti–Benchmark® International Core Equity Index (the “Index”). The Index is a proprietary rules–based index created by the Fund’s sub–adviser, TOBAM S.A.S. (“TOBAM”), which is designed to create a more diversified portfolio of equity securities of non-U.S. issuers relative to traditional market capitalization weighted benchmarks. The Fund intends to fully replicate the Index to achieve its investment objective, meaning the Fund will generally invest in all of the component securities of the Index in the same approximate proportions as the Index.The equity securities that comprise the Index primarily include common and preferred stock of non-U.S. companies that trade on foreign exchanges. TOBAM may replace the common or preferred stock of a foreign issuer with a depositary receipt when it deems the depositary receipt to be more liquid than the corresponding stock. In determining whether a company is foreign, TOBAM primarily looks to both the country of incorporation and the main listing country. If both of these countries are non-U.S., the company is considered non-U.S. for purposes of inclusion in the Index. The Index is comprised of securities of issuers located in developed markets. TOBAM considers the following countries to be developed markets for these purposes: Australia, Austria, Belgium, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, Luxembourg, Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland, and the United Kingdom.The Index is based on TOBAM’s proprietary quantitative model, which selects and weights companies to maximize diversification. TOBAM quantitatively selects securities, subject to certain constraints, that maximize the portfolio’s patented Diversification Ratio®, a proprietary mathematical metric based on the volatility of each Index constituent and its correlation to the other Index constituents. Such constraints include a minimum and maximum weight for any given stock, as well as geographic and country constraints. TOBAM’s Anti-Benchmark® strategy seeks to avoid the concentration risk that exists in traditional market capitalization-weighted indices through its quantitative approach to diversification.The Index typically is reconstituted (i.e., Index constituents are added or deleted and weights are reset) monthly. The Fund is rebalanced following the same schedule as the Index. The Fund may engage in frequent and active trading as part of its principal investment strategies.
Risk [Heading]	rr_RiskHeading	<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.•Preferred Stock Risk: In the event an issuer is liquidated or declares bankruptcy, the claims of owners of bonds take precedence over the claims of those who own preferred and common stock. If interest rates rise, the fixed dividend on preferred stocks may be less attractive, causing the price of preferred stocks to decline.Foreign Securities Risk: Investing in foreign securities poses additional risks since political and economic events unique in a country or region will affect those markets and their issuers, while such events may not necessarily affect the U.S. economy or issuers located in the United States. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect (positively or negatively) the value of the Fund’s investments. There are also risks associated with foreign accounting standards, government regulation, market information, and clearance and settlement procedures. Foreign markets may be less liquid and more volatile than U.S. markets and offer less protection to investors.•Depositary Receipts Risk: Foreign receipts, which include American Depositary Receipts, Global Depositary Receipts, and European Depositary Receipts, are securities that evidence ownership interests in a security or a pool of securities issued by a foreign issuer. The risks of depositary receipts include many risks associated with investing directly in foreign securities.Management Risk: In managing the Fund’s portfolio, the 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.Passive Investment Risk: As the Fund is intended to track the Index, its portfolio managers do not attempt to take defensive positions under any market conditions, including during declining markets. As a result, the Fund’s performance may be adversely affected by a general decline in the market segments relating to its Index.Quantitative Strategy Risk: TOBAM uses proprietary statistical analyses and models to construct the Index, which the Fund seeks to track. A securities portfolio selected using TOBAM’s proprietary models can perform differently than the market as a whole as a result of the correlation factors used in the analysis to construct the models, the weight placed on each factor, and changes in the factors’ historical trends. As a result, the Fund may be more or less exposed to a risk factor than its individual holdings. Quantitative models are subject to technical issues including programming and data inaccuracies, are based on assumptions, and rely on data that is subject to limitations (e.g., inaccuracies, staleness), any of which could adversely affect their effectiveness or predictive value.Tracking Error Risk: As with all index funds, the performance of the Fund and its Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index.Portfolio Turnover Risk: Frequent and active trading may result in greater expenses to the Fund, which may lower the Fund’s performance and may result in the realization of substantial capital gains, including net short-term capital gains. As a result, high portfolio turnover may reduce the Fund’s returns.
Risk Lose Money [Text]	rr_RiskLoseMoney	<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 and since inception compare with the MSCI EAFE 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 and since inception compare with the MSCI EAFE 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 Anti-Benchmark</span><span style="font-family:Arial;font-size:14pt;font-weight:bold;position:relative;top:1pt;">®</span><span style="font-family:Arial;font-size:10pt;font-weight:bold;"> International Core Equity Fund — Class Y 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 202015.41%Worst Quarter:1st Quarter 2020(16.84)%
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 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.
Touchstone Anti-Benchmark International Core Equity Fund | Class Y
Risk Return Abstract	rr_RiskReturnAbstract
Wire Redemption Fee	rr_RedemptionFee	$ 15	[1]
Management Fees	rr_ManagementFeesOverAssets	0.45%
Other Expenses (as a percentage of Assets):	rr_OtherExpensesOverAssets	4.04%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	4.49%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(3.80%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.69%	[2]
1 Year	rr_ExpenseExampleYear01	$ 70
3 Years	rr_ExpenseExampleYear03	1,012
5 Years	rr_ExpenseExampleYear05	1,963
10 Years	rr_ExpenseExampleYear10	$ 4,384
2019	rr_AnnualReturn2019	14.93%
2020	rr_AnnualReturn2020	12.46%
2021	rr_AnnualReturn2021	(5.39%)
2022	rr_AnnualReturn2022	(17.19%)
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	15.41%
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	(16.84%)
1 Year	rr_AverageAnnualReturnYear01	(17.19%)
SinceInception	rr_AverageAnnualReturnSinceInception	(0.91%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 19, 2018
Touchstone Anti-Benchmark International Core Equity Fund | Institutional Class
Risk Return Abstract	rr_RiskReturnAbstract
Wire Redemption Fee	rr_RedemptionFee	$ 15	[1]
Management Fees	rr_ManagementFeesOverAssets	0.45%
Other Expenses (as a percentage of Assets):	rr_OtherExpensesOverAssets	1.07%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.52%
Fee Waiver and/or Expense Reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.93%)	[2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	rr_NetExpensesOverAssets	0.59%	[2]
1 Year	rr_ExpenseExampleYear01	$ 60
3 Years	rr_ExpenseExampleYear03	389
5 Years	rr_ExpenseExampleYear05	741
10 Years	rr_ExpenseExampleYear10	$ 1,733
1 Year	rr_AverageAnnualReturnYear01	(16.84%)
SinceInception	rr_AverageAnnualReturnSinceInception	(0.69%)
Touchstone Anti-Benchmark International Core Equity Fund | Return After Taxes on Distributions | Class Y
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(17.81%)
SinceInception	rr_AverageAnnualReturnSinceInception	(1.99%)
Touchstone Anti-Benchmark International Core Equity Fund | Return After Taxes on Distributions and Sale of Shares | Class Y
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(9.64%)
SinceInception	rr_AverageAnnualReturnSinceInception	(0.55%)
Touchstone Anti-Benchmark International Core Equity Fund | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(14.45%)
SinceInception	rr_AverageAnnualReturnSinceInception	4.31%

[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 0.69% and 0.59%  of average daily net assets for Class Y and Institutional Class shares, respectively. This contractual expense limitation is effective through January 29, 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 Touchstone Advisors 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.