Shareholder Report, Line Graph (Details) 1014052_Franklin Exponential Data 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 |
Jan. 12, 2021 |
Mar. 31, 2026 |
|
| Franklin Exponential Data ETF | |||||||
| Account Value [Line Items] | |||||||
| Line Graph and Table Measure Name | Franklin Exponential Data ETF (NAV) | ||||||
| Accumulated Value | $ 8,975 | $ 9,084 | $ 6,744 | $ 9,112 | $ 9,336 | $ 10,000 | $ 8,438 |
| Russell 3000 Index [Member] | |||||||
| Account Value [Line Items] | |||||||
| Line Graph and Table Measure Name | Russell 3000 Index | ||||||
| Accumulated Value | $ 15,152 | $ 14,132 | $ 10,930 | $ 11,956 | $ 10,682 | $ 10,000 | $ 17,892 |