Shareholder Report, Line Graph (Details) 1014019_Franklin U.S. Large Cap Multifactor Index 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 |
Mar. 31, 2018 |
Apr. 26, 2017 |
Mar. 31, 2026 |
|
| Franklin U.S. Large Cap Multifactor Index ETF | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Franklin U.S. Large Cap Multifactor Index ETF (NAV) | |||||||||
| Accumulated Value | $ 25,558 | $ 23,831 | $ 18,237 | $ 19,357 | $ 16,952 | $ 11,437 | $ 12,747 | $ 11,384 | $ 10,000 | $ 30,995 |
| Russell 3000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 3000 Index | |||||||||
| Accumulated Value | 25,662 | 23,934 | 18,512 | 20,249 | 18,092 | 11,131 | 12,249 | 11,262 | 10,000 | $ 30,303 |
| Russell 1000 Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | Russell 1000 Index | |||||||||
| Accumulated Value | 26,455 | 24,536 | 18,893 | 20,624 | 18,208 | 11,338 | 12,328 | 11,279 | 10,000 | $ 31,149 |
| LibertyQ U.S. Large Cap Equity Index [Member] | ||||||||||
| Account Value [Line Items] | ||||||||||
| Line Graph and Table Measure Name | LibertyQ U.S. Large Cap Equity Index | |||||||||
| Accumulated Value | $ 26,002 | $ 24,208 | $ 18,500 | $ 19,612 | $ 17,155 | $ 11,558 | $ 12,859 | $ 11,454 | $ 10,000 | $ 31,589 |