Shareholder Report, Line Graph (Details) - USD ($) |
12 Months Ended | 24 Months Ended | 36 Months Ended | 48 Months Ended | 60 Months Ended | 72 Months Ended | 84 Months Ended | 96 Months Ended | 108 Months Ended | 120 Months Ended | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
May 31, 2016 |
May 31, 2026 |
May 31, 2017 |
May 31, 2018 |
May 31, 2019 |
May 31, 2020 |
May 31, 2021 |
May 31, 2022 |
May 31, 2023 |
May 31, 2024 |
May 31, 2025 |
May 31, 2026 |
|
| C000000110 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | BNY Mellon Intermediate Municipal Bond Fund, Inc. | |||||||||||
| Accumulated Value | $ 10,000 | $ 10,122 | $ 10,152 | $ 10,740 | $ 10,971 | $ 11,530 | $ 10,758 | $ 10,833 | $ 11,123 | $ 11,351 | $ 12,065 | |
| Bloomberg Municipal Bond 7 Year Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond: 7 Year Index (6-8) | |||||||||||
| Accumulated Value | 10,000 | 10,178 | 10,138 | 10,796 | 11,242 | 11,635 | 10,931 | 11,053 | 11,221 | 11,697 | 12,270 | |
| Bloomberg U S Municipal Bond Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Municipal Bond Index (broad-based index) | |||||||||||
| Accumulated Value | $ 10,000 | $ 10,146 | $ 10,259 | $ 10,915 | $ 11,350 | $ 11,888 | $ 11,080 | $ 11,135 | $ 11,432 | $ 11,664 | $ 12,442 | |