v3.26.1
Voya SmallCap Opportunities Portfolio Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Class ADV        
Prospectus [Line Items]        
Average Annual Return, Percent   14.18% 5.32% 8.56%
Performance Inception Date Nov. 20, 2008      
Class ADV | Russell 3000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   17.15% 13.15% 14.29%
Class ADV | Russell 2000® Growth Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   13.01% 3.18% 9.57%
Class ADV | Russell 2000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   12.81% 6.09% 9.62%
Class I        
Prospectus [Line Items]        
Average Annual Return, Percent   14.80% 5.85% 9.11%
Performance Inception Date May 06, 1994      
Class I | Russell 3000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   17.15% 13.15% 14.29%
Class I | Russell 2000® Growth Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   13.01% 3.18% 9.57%
Class I | Russell 2000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   12.81% 6.09% 9.62%
Class R6        
Prospectus [Line Items]        
Average Annual Return, Percent   14.83% 5.85% 9.10%
Performance Inception Date Nov. 24, 2015      
Class R6 | Russell 3000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   17.15% 13.15% 14.29%
Class R6 | Russell 2000® Growth Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   13.01% 3.18% 9.57%
Class R6 | Russell 2000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   12.81% 6.09% 9.62%
Class S        
Prospectus [Line Items]        
Average Annual Return, Percent   14.40% 5.56% 8.82%
Performance Inception Date May 03, 2001      
Class S | Russell 3000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   17.15% 13.15% 14.29%
Class S | Russell 2000® Growth Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   13.01% 3.18% 9.57%
Class S | Russell 2000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   12.81% 6.09% 9.62%
Class S2        
Prospectus [Line Items]        
Average Annual Return, Percent   14.39% 5.43% 8.67%
Performance Inception Date Feb. 27, 2009      
Class S2 | Russell 3000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   17.15% 13.15% 14.29%
Class S2 | Russell 2000® Growth Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   13.01% 3.18% 9.57%
Class S2 | Russell 2000® Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   12.81% 6.09% 9.62%
[1] The index returns do not reflect deductions for fees, expenses, or taxes.