v3.26.3
Voya Small Cap Growth Fund Average Annual Total Returns
 12 Months Ended 33 Months Ended 60 Months Ended 120 Months Ended
May 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000® Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [1]   17.15% 22.83%    
Class A C I R R6 and W Shares [Member] | Class A          
Prospectus [Line Items]          
Average Annual Return, Percent   7.59%   6.53% 12.16%
Performance Inception Date Oct. 07, 2022        
Class A C I R R6 and W Shares [Member] | Class A | Russell 3000® Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   17.15%   13.15% 14.29%
Class A C I R R6 and W Shares [Member] | Class A | Russell 2000® Growth Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   13.01%   3.18% 9.57%
Class A C I R R6 and W Shares [Member] | Class C          
Prospectus [Line Items]          
Average Annual Return, Percent   12.29%   6.99% 11.98%
Performance Inception Date Oct. 07, 2022        
Class A C I R R6 and W Shares [Member] | Class C | Russell 3000® Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   17.15%   13.15% 14.29%
Class A C I R R6 and W Shares [Member] | Class C | Russell 2000® Growth Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   13.01%   3.18% 9.57%
Class A C I R R6 and W Shares [Member] | Class I          
Prospectus [Line Items]          
Average Annual Return, Percent   14.49%   8.11% 13.13%
Performance Inception Date Oct. 01, 2004        
Class A C I R R6 and W Shares [Member] | Class I | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   13.07%   6.31% 11.05%
Class A C I R R6 and W Shares [Member] | Class I | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   9.62%   6.04% 10.21%
Class A C I R R6 and W Shares [Member] | Class I | Russell 3000® Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   17.15%   13.15% 14.29%
Class A C I R R6 and W Shares [Member] | Class I | Russell 2000® Growth Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   13.01%   3.18% 9.57%
Class A C I R R6 and W Shares [Member] | Class R          
Prospectus [Line Items]          
Average Annual Return, Percent   13.87%   7.53% 12.54%
Performance Inception Date Oct. 07, 2022        
Class A C I R R6 and W Shares [Member] | Class R | Russell 3000® Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   17.15%   13.15% 14.29%
Class A C I R R6 and W Shares [Member] | Class R | Russell 2000® Growth Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   13.01%   3.18% 9.57%
Class A C I R R6 and W Shares [Member] | Class R6          
Prospectus [Line Items]          
Average Annual Return, Percent   14.61%   8.17% 13.16%
Performance Inception Date Apr. 04, 2022        
Class A C I R R6 and W Shares [Member] | Class R6 | Russell 3000® Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   17.15%   13.15% 14.29%
Class A C I R R6 and W Shares [Member] | Class R6 | Russell 2000® Growth Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   13.01%   3.18% 9.57%
Class A C I R R6 and W Shares [Member] | Class W          
Prospectus [Line Items]          
Average Annual Return, Percent   14.46%   8.07% 13.11%
Performance Inception Date Oct. 07, 2022        
Class A C I R R6 and W Shares [Member] | Class W | Russell 3000® Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   17.15%   13.15% 14.29%
Class A C I R R6 and W Shares [Member] | Class W | Russell 2000® Growth Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [2]   13.01%   3.18% 9.57%
[1] The index returns do not reflect deductions for fees, expenses, or taxes.
[2] The index returns do not reflect deductions for fees, expenses, or taxes.