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Touchstone Common Stock 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],[2] 17.21% 13.09% 14.27%
Bloomberg US 1000 Index (reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [3] 17.51% 13.47% 14.55%
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 1000® Index (reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent 17.37% 13.59% 14.59%
Class I      
Prospectus [Line Items]      
Average Annual Return, Percent 17.83% 13.80% 14.20%
Class SC      
Prospectus [Line Items]      
Average Annual Return, Percent 17.65% 13.58% 13.93%
[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 one of 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.
[3] The Fund changed its additional index to the Bloomberg US 1000 Index which has similar investment objectives to the Fund.