v3.26.1
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended 120 Months Ended
May 31, 2026
May 31, 2026
May 31, 2026
C000016740      
Average Annual Return [Line Items]      
Average Annual Return, Percent 3.87% (0.17%) 1.45%
C000016743      
Average Annual Return [Line Items]      
Average Annual Return, Percent 5.00% (0.38%) 0.95%
C000016745      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Institutional Class    
Without Sales Load [Member] | C000016740      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.81% 0.38% 1.73%
Without Sales Load [Member] | C000016743      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.00% (0.38%) 0.95%
Without Sales Load [Member] | C000016744      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.92% 0.63% 1.95%
Without Sales Load [Member] | C000016745      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.92% 0.60% 1.97%
DWS Index: Bloomberg Municipal Bond Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.67% 0.92% 2.21%
DWS Index: Bloomberg Municipal Bond Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.67% 0.92% 2.21%
DWS Index: Bloomberg Municipal Bond Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.67% 0.92% 2.21%
DWS Index: Bloomberg Municipal Bond Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 6.67% 0.92% 2.21%