Average Annual Total Returns

12 Months Ended

60 Months Ended

90 Months Ended

120 Months Ended

Aug. 31, 2025

Dec. 31, 2024

Dec. 31, 2024

Dec. 31, 2024

Dec. 31, 2024

Bloomberg Municipal Bond Index[Member]

Prospectus [Line Items]

Average Annual Return, Percent

1.05%

0.99%

2.06%

^[1]

2.25%

Bloomberg Municipal High Yield Bond Index[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.32%

2.66%

4.25%

^[1]

4.28%

Bloomberg Municipal Bond Index (50%)/Bloomberg Municipal High Yield Bond Index (50%)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

3.66%

1.85%

3.17%

^[1]

3.28%

A

Prospectus [Line Items]

Average Annual Return, Percent

1.29%

0.68%

2.60%

C

Prospectus [Line Items]

Average Annual Return, Percent

2.83%

0.56%

2.16%

Z

Prospectus [Line Items]

Average Annual Return, Percent

4.92%

1.58%

3.18%

Z | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

4.92%

1.57%

3.17%

Z | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

4.62%

2.04%

3.35%

R6

Prospectus [Line Items]

Average Annual Return, Percent

5.01%

1.67%

2.89%

Performance Inception Date

Jun. 27, 2017

[1]	Since Inception returns for the Indexes are measured from the month-end closest to the inception date for Class R6 shares.