Shareholder Report, Line Graph (Details) 1014057_Western Asset Bond ETF_Single Class_TSR Annual {Single Class} - USD ($) |
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
Sep. 30, 2023 |
Sep. 19, 2023 |
Mar. 31, 2026 |
|
| Western Asset Bond ETF | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Western Asset Bond ETF (NAV) | |||||||||||
| Accumulated Value | $ 11,577 | $ 11,450 | $ 11,205 | $ 11,032 | $ 10,738 | $ 11,127 | $ 10,529 | $ 10,529 | $ 10,611 | $ 9,820 | $ 10,000 | $ 11,555 |
| Bloomberg U.S. Aggregate Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | |||||||||||
| Accumulated Value | $ 11,605 | $ 11,479 | $ 11,250 | $ 11,116 | $ 10,815 | $ 11,157 | $ 10,606 | $ 10,599 | $ 10,682 | $ 10,000 | $ 10,000 | $ 11,599 |