Shareholder Report, Line Graph (Details) LMF3300_Western Asset High Yield Fund_Class I_TSR Annual {Class I} - USD ($) |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
May 31, 2025 |
May 31, 2024 |
May 31, 2023 |
May 31, 2022 |
May 31, 2021 |
May 31, 2020 |
May 31, 2019 |
May 31, 2018 |
May 31, 2017 |
May 31, 2016 |
May 31, 2026 |
|
| Class I | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class I | ||||||||||
| Accumulated Value | $ 1,585,985 | $ 1,448,804 | $ 1,302,375 | $ 1,334,556 | $ 1,426,836 | $ 1,223,237 | $ 1,224,982 | $ 1,173,349 | $ 1,133,317 | $ 1,000,000 | $ 1,724,417 |
| Bloomberg U.S. Aggregate Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | ||||||||||
| Accumulated Value | 1,125,849 | 1,067,571 | 1,053,813 | 1,076,889 | 1,173,363 | 1,178,133 | 1,076,751 | 1,011,981 | 1,015,786 | 1,000,000 | $ 1,183,642 |
| Bloomberg U.S. Corporate High Yield - 2% Issuer Cap Index [Member] | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Corporate High Yield - 2% Issuer Cap Index | ||||||||||
| Accumulated Value | $ 1,645,086 | $ 1,504,890 | $ 1,352,959 | $ 1,352,314 | $ 1,427,630 | $ 1,242,447 | $ 1,226,388 | $ 1,162,427 | $ 1,135,739 | $ 1,000,000 | $ 1,769,611 |