Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	Jul. 31, 2026	Jul. 31, 2026	Jul. 31, 2026
C000015684
Average Annual Return [Line Items]
Average Annual Return, Percent	2.38%	7.69%	14.67%
C000015687
Average Annual Return [Line Items]
Average Annual Return, Percent	6.96%	8.16%	14.49%
C000015690
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Institutional Class
Without Sales Load [Member] \| C000015684
Average Annual Return [Line Items]
Average Annual Return, Percent	8.63%	8.97%	15.35%
Without Sales Load [Member] \| C000015687
Average Annual Return [Line Items]
Average Annual Return, Percent	7.83%	8.16%	14.49%
Without Sales Load [Member] \| C000015689
Average Annual Return [Line Items]
Average Annual Return, Percent	8.91%	9.25%	15.64%
Without Sales Load [Member] \| C000015690
Average Annual Return [Line Items]
Average Annual Return, Percent	8.90%	9.25%	15.65%
DWS Index: Russell 1000® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	18.94%	12.12%	14.82%
DWS Index: Russell 1000® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	18.94%	12.12%	14.82%
DWS Index: Russell 1000® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	18.94%	12.12%	14.82%
DWS Index: Russell 1000® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	18.94%	12.12%	14.82%
DWS Index: Russell 1000® Growth Index
Average Annual Return [Line Items]
Average Annual Return, Percent	8.03%	11.88%	17.46%
DWS Index: Russell 1000® Growth Index
Average Annual Return [Line Items]
Average Annual Return, Percent	8.03%	11.88%	17.46%
DWS Index: Russell 1000® Growth Index
Average Annual Return [Line Items]
Average Annual Return, Percent	8.03%	11.88%	17.46%
DWS Index: Russell 1000® Growth Index
Average Annual Return [Line Items]
Average Annual Return, Percent	8.03%	11.88%	17.46%