v3.26.3
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended 69 Months Ended 120 Months Ended
Aug. 31, 2026
Aug. 31, 2026
Aug. 31, 2026
Aug. 31, 2026
C000016814        
Average Annual Return [Line Items]        
Average Annual Return, Percent 2.24% (0.58%)   1.02%
C000016816        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.19% (0.79%)   0.55%
C000223770        
Average Annual Return [Line Items]        
Line Graph and Table Measure Name Institutional Class      
Without Sales Load [Member] | C000016814        
Average Annual Return [Line Items]        
Average Annual Return, Percent 5.13% (0.02%)   1.30%
Without Sales Load [Member] | C000016816        
Average Annual Return [Line Items]        
Average Annual Return, Percent 4.19% (0.79%)   0.55%
Without Sales Load [Member] | C000016817        
Average Annual Return [Line Items]        
Average Annual Return, Percent 5.39% 0.22%   1.55%
Without Sales Load [Member] | C000223770        
Average Annual Return [Line Items]        
Average Annual Return, Percent 5.39% 0.22% 0.71%  
DWS Index: Bloomberg Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 4.12% 0.54%   1.91%
DWS Index: Bloomberg Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 4.12% 0.54%   1.91%
DWS Index: Bloomberg Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 4.12% 0.54%   1.91%
DWS Index: Bloomberg Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 4.12% 0.54% 0.84%  
DWS Index: Bloomberg California Exempt Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.85% 0.53%   1.84%
DWS Index: Bloomberg California Exempt Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.85% 0.53%   1.84%
DWS Index: Bloomberg California Exempt Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.85% 0.53%   1.84%
DWS Index: Bloomberg California Exempt Municipal Bond Index        
Average Annual Return [Line Items]        
Average Annual Return, Percent 3.85% 0.53% 0.73%