Shareholder Report, Line Graph (Details) 1014042_Franklin High Yield Corporate ETF_Single Class_TSR Annual {Single Class} - USD ($) |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
Mar. 31, 2022 |
Mar. 31, 2021 |
Mar. 31, 2020 |
Mar. 31, 2019 |
May 30, 2018 |
Mar. 31, 2026 |
|
| Franklin High Yield Corporate ETF | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | Franklin High Yield Corporate ETF (NAV) | ||||||||
| Accumulated Value | $ 14,427 | $ 13,463 | $ 12,007 | $ 12,337 | $ 12,422 | $ 10,158 | $ 10,707 | $ 10,000 | $ 15,588 |
| Bloomberg U.S. Aggregate Index [Member] | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | ||||||||
| Accumulated Value | 11,162 | 10,642 | 10,465 | 10,990 | 11,466 | 11,386 | 10,452 | 10,000 | $ 11,647 |
| ICE BofA U.S. High Yield Constrained Index [Member] | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | ICE BofA U.S. High Yield Constrained Index | ||||||||
| Accumulated Value | $ 13,787 | $ 12,814 | $ 11,537 | $ 11,966 | $ 12,001 | $ 9,739 | $ 10,525 | $ 10,000 | $ 14,738 |