Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	May 31, 2026	May 31, 2026	May 31, 2026
C000016782
Average Annual Return [Line Items]
Average Annual Return, Percent	3.35%	2.21%	6.60%
C000016785
Average Annual Return [Line Items]
Average Annual Return, Percent	7.81%	2.66%	6.43%
C000016787
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Institutional Class
Without Sales Load [Member] \| C000016782
Average Annual Return [Line Items]
Average Annual Return, Percent	9.65%	3.43%	7.23%
Without Sales Load [Member] \| C000016785
Average Annual Return [Line Items]
Average Annual Return, Percent	8.81%	2.66%	6.43%
Without Sales Load [Member] \| C000016786
Average Annual Return [Line Items]
Average Annual Return, Percent	9.94%	3.71%	7.52%
Without Sales Load [Member] \| C000016787
Average Annual Return [Line Items]
Average Annual Return, Percent	9.97%	3.73%	7.53%
DWS Index: S&P 500® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	29.78%	14.15%	15.65%
DWS Index: S&P 500® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	29.78%	14.15%	15.65%
DWS Index: S&P 500® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	29.78%	14.15%	15.65%
DWS Index: S&P 500® Index
Average Annual Return [Line Items]
Average Annual Return, Percent	29.78%	14.15%	15.65%
DWS Index: MSCI World Health Care Index
Average Annual Return [Line Items]
Average Annual Return, Percent	12.09%	4.41%	8.07%
DWS Index: MSCI World Health Care Index
Average Annual Return [Line Items]
Average Annual Return, Percent	12.09%	4.41%	8.07%
DWS Index: MSCI World Health Care Index
Average Annual Return [Line Items]
Average Annual Return, Percent	12.09%	4.41%	8.07%
DWS Index: MSCI World Health Care Index
Average Annual Return [Line Items]
Average Annual Return, Percent	12.09%	4.41%	8.07%