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S000000555 [Member] Investment Objectives and Goals - Nuveen Massachusetts Municipal Bond Fund
Feb. 28, 2026
Prospectus [Line Items]  
Risk/Return [Heading] Nuveen Massachusetts Municipal Bond Fund
Objective [Heading] Investment Objective
Objective, Primary [Text Block]
The investment objective of the Fund is to provide you with as high a level of current interest income exempt from regular federal, Massachusetts state and, in some cases, Massachusetts local income taxes as is consistent with preservation of capital.