S000061500 [Member] Annual Total Returns |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Nuveen Global Real Estate Securities Fund | Class A | |||||||||
| Prospectus [Line Items] | |||||||||
| Annual Return [Percent] | [1] | 9.13% | 0.47% | 11.22% | (25.09%) | 28.21% | (1.32%) | 27.55% | |
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