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Federated Hermes MDT Small Cap Growth Fund Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [1],[2] 17.15% 13.15% 14.28%
Russell 2000® Growth Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [3] 18.56% 15.32% 18.12%
Morningstar Small Growth Funds Category Average[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [4] 15.92% 11.11% 14.53%
Class A C IS and R6 Shares [Member] | Russell 3000® Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [5],[6] 17.15% 13.15% 14.28%
Class A C IS and R6 Shares [Member] | Russell 2000® Growth Index(reflects no deduction for fees, expenses or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [7] 13.01% 3.18% 9.57%
Class A C IS and R6 Shares [Member] | Morningstar Small Growth Funds Category Average[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent [8] 7.73% 2.75% 9.80%
Class A C IS and R6 Shares [Member] | A      
Prospectus [Line Items]      
Average Annual Return, Percent 10.35% 4.99% 10.83%
Class A C IS and R6 Shares [Member] | C      
Prospectus [Line Items]      
Average Annual Return, Percent 14.80% 5.30% 10.77%
Class A C IS and R6 Shares [Member] | IS      
Prospectus [Line Items]      
Average Annual Return, Percent 17.09% 6.45% 11.75%
Class A C IS and R6 Shares [Member] | IS | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 16.07% 4.37% 10.17%
Class A C IS and R6 Shares [Member] | IS | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 10.89% 4.33% 9.11%
Class A C IS and R6 Shares [Member] | R6      
Prospectus [Line Items]      
Average Annual Return, Percent 17.11% 6.46% 11.75%
[1] The Russell 3000® Index is a broad-based benchmark that measures the performance of the largest 3,000 U.S. companies representing approximately 98% of the investable U.S. equity market.
[2] The Russell 3000® Index is a broad-based benchmark that measures the performance of the largest 3,000 U.S. companies representing approximately 98% of the investable U.S. equity market.
[3] The Russell 1000® Growth Index measures the performance of those Russell 1000 companies with higher price-to-book ratios and higher forecasted growth values.
[4] Morningstar figures represent the average of the total returns reported by all the mutual funds designated by Morningstar as falling into the respective category indicated. They do not reflect sales charges.
[5] The Russell 3000® Index is a broad-based benchmark that measures the performance of the largest 3,000 U.S. companies representing approximately 98% of the investable U.S. equity market.
[6] The Russell 3000® Index is a broad-based benchmark that measures the performance of the largest 3,000 U.S. companies representing approximately 98% of the investable U.S. equity market.
[7] The Russell 2000® Growth Index measures the performance of those Russell 2000 companies with higher price-to-value ratios and higher forecasted growth values.
[8] Morningstar figures represent the average of the total returns reported by all the funds designated by Morningstar as falling into the respective category indicated. They do not reflect sales charges.