v3.25.4
Transamerica Mid Cap Growth Expense Example, No Redemption - Retail Class [Member] - Transamerica Mid Cap Growth
Oct. 31, 2025
USD ($)
A  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 669
Expense Example, No Redemption, 3 Years 922
Expense Example, No Redemption, 5 Years 1,194
Expense Example, No Redemption, 10 Years 1,967
C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 202
Expense Example, No Redemption, 3 Years 649
Expense Example, No Redemption, 5 Years 1,123
Expense Example, No Redemption, 10 Years 2,432
I  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 94
Expense Example, No Redemption, 3 Years 300
Expense Example, No Redemption, 5 Years 523
Expense Example, No Redemption, 10 Years 1,164
I2  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 84
Expense Example, No Redemption, 3 Years 268
Expense Example, No Redemption, 5 Years 468
Expense Example, No Redemption, 10 Years 1,046
R6  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 84
Expense Example, No Redemption, 3 Years 268
Expense Example, No Redemption, 5 Years 468
Expense Example, No Redemption, 10 Years $ 1,046