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S000057731 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 72 Months Ended 74 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Morningstar Municipal Bond Blended Index (reflects no deduction for fees, expenses, or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [1] 1.50% 1.09% [2]  
Performance Inception Date [1]     Jan. 01, 2019  
Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [3] 1.05% 0.99%   2.42% [2]
Performance Inception Date [2],[3]       Nov. 02, 2018
Institutional        
Prospectus [Line Items]        
Average Annual Return, Percent 2.57% 1.20%   2.30% [2]
Performance Inception Date [2]       Nov. 02, 2018
Institutional | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent 2.52% 1.17%   2.24% [2]
Performance Inception Date [2]       Nov. 02, 2018
Institutional | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent 2.81% 1.43%   2.27% [2]
Performance Inception Date [2]       Nov. 02, 2018
[1] The Morningstar Municipal Bond Blended Index is composed of 70% Bloomberg Municipal Bond Index and 30% Bloomberg Municipal 1‑3 Year Bond Index. The Bloomberg Municipal Bond Index is an unmanaged index that is considered representative of the broad market for investment grade, tax‑exempt bonds with a maturity of at least one year. The Bloomberg Municipal 1‑3 Year Bond Index consists of a broad selection of investment grade general obligation and revenue bonds of maturities ranging from one year to three years.
[2]
Inception date for Morningstar Municipal Bond Blended Index is 1/1/2019.
[3]
The Bloomberg Municipal Bond Index is an unmanaged broad-based securities market index that is considered representative of the broad market for investment grade, tax‑exempt bonds with a maturity of at least one year.