v3.25.4
Transamerica Large Growth Average Annual Total Returns - Retail Class [Member]
12 Months Ended 55 Months Ended 60 Months Ended 104 Months Ended 106 Months Ended 120 Months Ended 140 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
[2]
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
[3]
Dec. 31, 2025
[4]
Dec. 31, 2025
Dec. 31, 2025
[5]
Russell 3000® Index (reflects no deduction for fees, expenses or taxes)[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent   17.15% [1] 11.55%   13.15% [1] 14.28% 14.09% 14.29% [1]
Performance Inception Date Apr. 21, 2017 [3]   May 28, 2021       Mar. 10, 2017    
Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)[Member]                  
Prospectus [Line Items]                  
Average Annual Return, Percent   18.56%   15.26% 15.32%     18.13%  
Performance Inception Date May 28, 2021                
R6                  
Prospectus [Line Items]                  
Average Annual Return, Percent   19.24%   6.97%          
Performance Inception Date May 28, 2021                
R6 | After Taxes on Distributions                  
Prospectus [Line Items]                  
Average Annual Return, Percent   11.36%   3.21%          
R6 | After Taxes on Distributions and Sales                  
Prospectus [Line Items]                  
Average Annual Return, Percent   16.47%   5.03%          
[1] “Russell®” and other service marks and trademarks related to the Russell indexes are trademarks of the London Stock Exchange Group companies.
[2] “Russell®” and other service marks and trademarks related to the Russell indexes are trademarks of the London Stock Exchange Group companies.
[3] “Russell®” and other service marks and trademarks related to the Russell indexes are trademarks of the London Stock Exchange Group companies.
[4] “Russell®” and other service marks and trademarks related to the Russell indexes are trademarks of the London Stock Exchange Group companies.
[5] “Russell®” and other service marks and trademarks related to the Russell indexes are trademarks of the London Stock Exchange Group companies.