S000000285 [Member] Annual Fund Operating Expenses - Nuveen Intermediate Duration Municipal Bond Fund |
Mar. 31, 2026 |
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.38% |
| Distribution and Service (12b-1) Fees | 0.20% |
| Other Expenses (as a percentage of Assets): | 0.05% |
| Expenses (as a percentage of Assets) | 0.63% |
| Class I | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.38% |
| Distribution and Service (12b-1) Fees | 0.00% |
| Other Expenses (as a percentage of Assets): | 0.05% |
| Expenses (as a percentage of Assets) | 0.43% |
| Class C | |
| Prospectus [Line Items] | |
| Management Fees (as a percentage of Assets) | 0.38% |
| Distribution and Service (12b-1) Fees | 1.00% |
| Other Expenses (as a percentage of Assets): | 0.05% |
| Expenses (as a percentage of Assets) | 1.43% |