v3.25.2
S000000285 [Member] Annual Fund Operating Expenses - Nuveen Intermediate Duration Municipal Bond Fund
Mar. 31, 2025
Class A  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.38%
Distribution and Service (12b-1) Fees 0.20%
Component1 Other Expenses 0.01% [1]
Component2 Other Expenses 0.05%
Expenses (as a percentage of Assets) 0.64%
Class C  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.38%
Distribution and Service (12b-1) Fees 1.00%
Component1 Other Expenses 0.01% [1]
Component2 Other Expenses 0.05%
Expenses (as a percentage of Assets) 1.44%
Class I  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.38%
Distribution and Service (12b-1) Fees 0.00%
Component1 Other Expenses 0.01% [1]
Component2 Other Expenses 0.05%
Expenses (as a percentage of Assets) 0.44%
[1] Includes interest expense and fees paid on Fund borrowings and/or interest and related expenses from inverse floaters.