v3.26.3
Average Annual Total Returns
12 Months Ended 60 Months Ended 97 Months Ended 120 Months Ended
Aug. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg Municipal Bond Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent [1]   4.25% 0.80% 2.34% [2] 2.34%
Bloomberg 1-15 Year Municipal Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   5.18% 1.16% 2.38% [2] 2.27%
A          
Prospectus [Line Items]          
Average Annual Return, Percent   1.26% 0.18%   1.77%
C          
Prospectus [Line Items]          
Average Annual Return, Percent   2.70% (0.04%)   1.25%
Z          
Prospectus [Line Items]          
Average Annual Return, Percent   4.93% 1.11%   2.36%
Z | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   4.87% 1.09%   2.34%
Z | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   4.30% 1.44%   2.50%
R6          
Prospectus [Line Items]          
Average Annual Return, Percent   5.00% 1.18% 2.42%
Performance Inception Date Dec. 04, 2017        
[1] The Fund compares its performance against this broad-based index in response to regulatory requirements.
[2] Since Inception returns for the Indexes are measured from the month-end closest to the inception date for Class R6 shares.