Shareholder Report, Average Annual Return (Details) 1014048_Franklin Genomic Advancements ETF_Single Class_TSR Annual {Single Class} |
12 Months Ended | 60 Months Ended | 73 Months Ended |
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2026 |
Mar. 31, 2026 |
|
| Franklin Genomic Advancements ETF | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Franklin Genomic Advancements ETF (NAV) | ||
| Average Annual Return, Percent | 22.84% | (5.15%) | 4.79% |
| 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% | 13.94% |