AB Intermediate Municipal Portfolios [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 |
|
| AB Intermediate Municipal Portfolios | Diversified Municipal Portfolio | AB Intermediate Diversified Municipal Class A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 4.33% | 2.04% | 4.86% | (5.94%) | 1.18% | 3.92% | 5.47% | 0.65% | 2.74% | (0.54%) |