v3.26.3
Touchstone Small Company Fund Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg US 3000 Index (reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 17.21% 13.09% 14.27%
Bloomberg US 2000 Index (reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 11.06% 6.65% 10.00%
Russell 3000® Index (reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent 17.15% 13.15% 14.29%
Russell 2000® Index (reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent 12.81% 6.09% 9.62%
Class A      
Prospectus [Line Items]      
Average Annual Return, Percent 4.15% 7.48% 10.13%
Class A | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 2.50% 5.65% 8.22%
Class A | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 3.12% 5.44% 7.69%
Class C      
Prospectus [Line Items]      
Average Annual Return, Percent 7.74% 7.76% 10.05%
Class Y      
Prospectus [Line Items]      
Average Annual Return, Percent [3] 9.81% 8.92% 11.01%
Institutional Class      
Prospectus [Line Items]      
Average Annual Return, Percent [4] 9.92% 9.04% 11.05%
Class R6      
Prospectus [Line Items]      
Average Annual Return, Percent [5] 9.98% 9.03% 11.13%
[1] The Fund changed its broad-based securities market index to the Bloomberg US 3000 Index which is similarly representative of the overall securities market applicable to the Fund.
[2] The Fund changed its additional index to the Bloomberg US 2000 Index which has a similar investment universe to the Fund.
[3] Class Y shares of the Fund assumed the performance history of Class I shares of the Predecessor Fund.
[4] Performance of Institutional Class shares of the Fund prior to October 30, 2017 (the inception date for Institutional Class shares) is based on the Predecessor Fund's Class A share performance.
[5] 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.