v3.25.4
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 41 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
C000099770        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name Class A      
Average Annual Return, Percent 10.30%   6.88% 8.95%
C000237496        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name Class S      
C000099773        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name Institutional Class      
Without Sales Load [Member] | C000099770        
Average Annual Return [Line Items]        
Average Annual Return, Percent 17.02%   8.15% 9.59%
Without Sales Load [Member] | C000237496        
Average Annual Return [Line Items]        
Average Annual Return, Percent 17.36% 21.21%    
Without Sales Load [Member] | C000099773        
Average Annual Return [Line Items]        
Average Annual Return, Percent 17.39%   8.44% 9.87%
DWS Index: Russell 3000® Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 17.15%   13.15% 14.29%
DWS Index: Russell 3000® Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 17.15% 17.00%    
DWS Index: Russell 3000® Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 17.15%   13.15% 14.29%
DWS Index: Russell 3000® Growth Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 18.15%   14.59% 17.59%
DWS Index: MSCI World Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 21.09%   12.15% 12.17%
DWS Index: MSCI World Communication Services Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 32.03%   13.16% 11.33%
DWS Index: Russell 3000® Growth Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 18.15% 21.61%    
DWS Index: MSCI World Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 21.09% 16.74%    
DWS Index: MSCI World Communication Services Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 32.03% 25.60%    
DWS Index: Russell 3000® Growth Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 18.15%   14.59% 17.59%
DWS Index: MSCI World Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 21.09%   12.15% 12.17%
DWS Index: MSCI World Communication Services Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 32.03%   13.16% 11.33%