S000000285 [Member] Expense Example, No Redemption - Nuveen Intermediate Duration Municipal Bond Fund |
Mar. 31, 2025
USD ($)
|
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 363 |
| Expense Example, No Redemption, 3 Years | 499 |
| Expense Example, No Redemption, 5 Years | 646 |
| Expense Example, No Redemption, 10 Years | 1,074 |
| Class C | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 147 |
| Expense Example, No Redemption, 3 Years | 456 |
| Expense Example, No Redemption, 5 Years | 787 |
| Expense Example, No Redemption, 10 Years | 1,724 |
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 45 |
| Expense Example, No Redemption, 3 Years | 141 |
| Expense Example, No Redemption, 5 Years | 246 |
| Expense Example, No Redemption, 10 Years | $ 555 |