v3.25.2
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended 116 Months Ended
May 31, 2025
May 31, 2025
May 31, 2025
C000160936 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Institutional Shares    
Average Annual Return, Percent 11.85% 15.68% 13.76%
C000160934 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Investor A Shares (with sales charge)    
Average Annual Return, Percent 5.75% 14.16% 12.84%
C000160935 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Investor C Shares (with sales charge)    
Average Annual Return, Percent 9.78% 14.55% 12.78%
C000166019 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Class K Shares    
Average Annual Return, Percent 11.90% 15.74% 13.81%
Without Sales Load [Member] | C000160934 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Investor A Shares    
Average Annual Return, Percent 11.62% 15.40% 13.48%
Without Sales Load [Member] | C000160935 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Investor C Shares    
Average Annual Return, Percent 10.73% 14.55% 12.78%
Russell 1000 Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Russell 1000® Index    
Average Annual Return, Percent 13.73% 15.66% 13.71%