Shareholder Report, Line Graph (Details) LMF5600_Western Asset Oregon Municipals Fund_Class A_TSR Annual {Class A} - USD ($) |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 30, 2025 |
Apr. 30, 2024 |
Apr. 30, 2023 |
Apr. 30, 2022 |
Apr. 30, 2021 |
Apr. 30, 2020 |
Apr. 30, 2019 |
Apr. 30, 2018 |
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2026 |
|
| Class A | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class A (with sales charge) | ||||||||||
| Accumulated Value | $ 10,611 | $ 10,410 | $ 10,275 | $ 10,185 | $ 10,942 | $ 10,185 | $ 10,068 | $ 9,620 | $ 9,455 | $ 9,575 | $ 11,223 |
| Bloomberg Municipal Bond Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | ||||||||||
| Accumulated Value | 11,688 | 11,497 | 11,262 | 10,947 | 11,884 | 11,030 | 10,797 | 10,170 | 10,014 | 10,000 | $ 12,429 |
| Bloomberg Oregon Municipal Bond Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Bloomberg Oregon Municipal Bond Index | ||||||||||
| Accumulated Value | $ 11,465 | $ 11,285 | $ 11,164 | $ 10,845 | $ 11,859 | $ 11,154 | $ 10,748 | $ 10,130 | $ 10,022 | $ 10,000 | $ 12,234 |