S000020012 [Member] Expense Example, No Redemption - Nuveen Global Infrastructure Fund |
Dec. 31, 2025
USD ($)
|
|---|---|
| Class A | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | $ 691 |
| Expense Example, No Redemption, 3 Years | 946 |
| Expense Example, No Redemption, 5 Years | 1,237 |
| Expense Example, No Redemption, 10 Years | 2,061 |
| Class I | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 98 |
| Expense Example, No Redemption, 3 Years | 316 |
| Expense Example, No Redemption, 5 Years | 568 |
| Expense Example, No Redemption, 10 Years | 1,292 |
| Class C | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 199 |
| Expense Example, No Redemption, 3 Years | 625 |
| Expense Example, No Redemption, 5 Years | 1,093 |
| Expense Example, No Redemption, 10 Years | 2,388 |
| Class R6 | |
| Prospectus [Line Items] | |
| Expense Example, No Redemption, 1 Year | 90 |
| Expense Example, No Redemption, 3 Years | 291 |
| Expense Example, No Redemption, 5 Years | 525 |
| Expense Example, No Redemption, 10 Years | $ 1,199 |