S000000554 [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 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Nuveen Connecticut Municipal Bond Fund | Nuveen Connecticut Municipal Bond Fund - Class A | ||||||||||||
| Prospectus [Line Items] | ||||||||||||
| Annual Return [Percent] | [1] | 3.17% | 2.23% | 5.77% | (11.42%) | 2.23% | 4.35% | 6.67% | 0.68% | 4.13% | 0.14% | |
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