Annual Total Returns |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BNY Mellon California AMT-Free Municipal Bond Fund, Inc. | Z | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 2.91% | 1.91% | 6.06% | (10.42%) | 1.95% | 4.09% | 7.06% | 0.17% | 5.85% | (0.73%) |