Annual Total Returns |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|---|---|---|---|---|---|---|---|
| Franklin Short Duration U.S. Government ETF | Franklin Short Duration U.S. Government ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 5.12% | 4.85% | (3.13%) | (0.84%) | 2.98% | 2.97% | 1.20% | 0.79% | 1.01% | 0.35% |