Shareholder Report, Average Annual Return (Details) 1014019_Franklin U.S. Large Cap Multifactor Index ETF_Single Class_TSR Annual {Single Class} |
12 Months Ended | 60 Months Ended | 107 Months Ended |
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2026 |
Mar. 31, 2026 |
|
| Franklin U.S. Large Cap Multifactor Index ETF | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Franklin U.S. Large Cap Multifactor Index ETF (NAV) | ||
| Average Annual Return, Percent | 21.27% | 12.83% | 13.51% |
| Russell 3000 Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Russell 3000 Index | ||
| Average Annual Return, Percent | 18.09% | 10.87% | 13.19% |
| Russell 1000 Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Russell 1000 Index | ||
| Average Annual Return, Percent | 17.74% | 11.34% | 13.55% |
| LibertyQ U.S. Large Cap Equity Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | LibertyQ U.S. Large Cap Equity Index | ||
| Average Annual Return, Percent | 21.49% | 12.99% | 13.70% |