Shareholder Report, Line Graph (Details) 1014041_Franklin Senior Loan 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 Senior Loan ETF | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | Franklin Senior Loan ETF (NAV) | ||||||||
| Accumulated Value | $ 13,752 | $ 12,972 | $ 11,603 | $ 11,317 | $ 11,013 | $ 9,842 | $ 10,244 | $ 10,000 | $ 14,157 |
| 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 |
| Morningstar LSTA U.S. Leveraged Loan 100 Index [Member] | |||||||||
| Account Value [Line Items] | |||||||||
| Line Graph and Table Measure Name | Morningstar LSTA U.S. Leveraged Loan 100 Index | ||||||||
| Accumulated Value | $ 14,141 | $ 13,208 | $ 11,776 | $ 11,478 | $ 11,220 | $ 9,733 | $ 10,261 | $ 10,000 | $ 14,980 |