Class A C F I I And Class I S [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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 |
Dec. 31, 2015 |
|
| Class A, C, FI, I and Class IS | Western Asset Short Duration Municipal Income Fund | Class A | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 2.24% | 3.65% | (3.31%) | 0.19% | 2.57% | 3.25% | 1.01% | 1.40% | 0.07% | 0.31% |