Shareholder Report, Line Graph (Details) LMF6800_Western Asset Total Return Unconstrained Fund_Class FI_TSR Annual {Class FI} - 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 FI | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Class FI | ||||||||||
| Accumulated Value | $ 11,754 | $ 10,968 | $ 10,445 | $ 10,888 | $ 12,136 | $ 11,323 | $ 11,219 | $ 10,882 | $ 10,733 | $ 10,000 | $ 12,201 |
| Bloomberg U.S. Aggregate Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | ||||||||||
| Accumulated Value | 11,258 | 10,676 | 10,538 | 10,769 | 11,734 | 11,781 | 10,768 | 10,120 | 10,158 | 10,000 | $ 11,836 |
| ICE BofA 3-Month U.S. Treasury Bill Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | ICE BofA 3-Month U.S. Treasury Bill Index | ||||||||||
| Accumulated Value | $ 12,102 | $ 11,552 | $ 10,954 | $ 10,620 | $ 10,605 | $ 10,593 | $ 10,402 | $ 10,172 | $ 10,044 | $ 10,000 | $ 12,572 |