v3.25.4
S000049244 [Member] Expense Example - Tax-Exempt High Yield Bond Fund
Oct. 31, 2025
USD ($)
Class M  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 55
Expense Example, with Redemption, 3 Years 221
Expense Example, with Redemption, 5 Years 401
Expense Example, with Redemption, 10 Years 922
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 462
Expense Example, with Redemption, 3 Years 673
Expense Example, with Redemption, 5 Years 901
Expense Example, with Redemption, 10 Years 1,554
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 167
Expense Example, with Redemption, 3 Years 542
Expense Example, with Redemption, 5 Years 943
Expense Example, with Redemption, 10 Years 2,063
Class S  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 62
Expense Example, with Redemption, 3 Years 228
Expense Example, with Redemption, 5 Years 408
Expense Example, with Redemption, 10 Years $ 928