Touchstone Value Fund Investment Strategy - Touchstone Value Fund	Jun. 30, 2026
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial Narrow;font-size:12pt;font-weight:bold;text-decoration:underline;">The Fund’s Principal Investment Strategies</span>
Strategy Narrative [Text Block]	Under normal circumstances, the Fund will invest at least 80% of its assets in equity securities of large- and mid-cap companies (generally, companies with market capitalizations of approximately $2.5 billion or higher) that the Fund’s sub-adviser, Barrow, Hanley, Mewhinney & Strauss, LLC d/b/a Barrow Hanley Global Investors (“Barrow Hanley”), believes are undervalued. As part of this strategy, the Fund may invest up to 15% of its assets in foreign equity securities. Equity securities include common and preferred stocks and depositary receipts. Barrow Hanley uses traditional methods of stock selection — research and analysis — to identify securities it believes are undervalued and searches for companies that have one or more of the following characteristics: price to earnings ratio below the market, price to book ratio below the market, price to free cash flow ratio below the market, or dividend yields above the market. The Fund's 80% policy is a non-fundamental investment policy that can be changed by the Fund upon 60 days' prior written notice to shareholders. Although the Fund may also focus its investments within certain sectors, Barrow Hanley uses risk management tools to prevent over-exposure to particular market segments. Barrow Hanley is a “bottom-up” value manager, meaning it analyzes the fundamentals of companies one at a time rather than focusing on broader market themes.Barrow Hanley generally considers selling a security when it reaches fair value estimate, when earnings forecasts do not appear to justify the current price, when there has been or there is an expectation of an adverse change in the company’s fundamentals, or when other investment opportunities appear more attractive.

Touchstone Value Fund Investment Strategy - Touchstone Value Fund

Jun. 30, 2026

<span style="color:#000000;font-family:Arial Narrow;font-size:12pt;font-weight:bold;text-decoration:underline;">The Fund’s Principal Investment Strategies</span>

Strategy Narrative [Text Block]

Under normal circumstances, the Fund will invest at least 80% of its assets in equity securities of large- and mid-cap companies (generally, companies with market capitalizations of approximately $2.5 billion or higher) that the Fund’s sub-adviser, Barrow, Hanley, Mewhinney & Strauss, LLC d/b/a Barrow Hanley Global Investors (“Barrow Hanley”), believes are undervalued. As part of this strategy, the Fund may invest up to 15% of its assets in foreign equity securities. Equity securities include common and preferred stocks and depositary receipts. Barrow Hanley uses traditional methods of stock selection — research and analysis — to identify securities it believes are undervalued and searches for companies that have one or more of the following characteristics: price to earnings ratio below the market, price to book ratio below the market, price to free cash flow ratio below the market, or dividend yields above the market. The Fund's 80% policy is a non-fundamental investment policy that can be changed by the Fund upon 60 days' prior written notice to shareholders. Although the Fund may also focus its investments within certain sectors, Barrow Hanley uses risk management tools to prevent over-exposure to particular market segments. Barrow Hanley is a “bottom-up” value manager, meaning it analyzes the fundamentals of companies one at a time rather than focusing on broader market themes.Barrow Hanley generally considers selling a security when it reaches fair value estimate, when earnings forecasts do not appear to justify the current price, when there has been or there is an expectation of an adverse change in the company’s fundamentals, or when other investment opportunities appear more attractive.