Shareholder Report, Average Annual Return (Details) 1014015_Franklin Investment Grade Corporate ETF_Single Class_TSR Annual {Single Class} |
12 Months Ended | 60 Months Ended | 114 Months Ended |
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2026 |
Mar. 31, 2026 |
|
| Franklin Investment Grade Corporate ETF | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Franklin Investment Grade Corporate ETF (NAV) | ||
| Average Annual Return, Percent | 4.53% | 0.43% | 2.13% |
| Bloomberg U.S. Aggregate Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | ||
| Average Annual Return, Percent | 4.35% | 0.31% | 1.51% |
| Bloomberg U.S. Corporate - Investment Grade Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg U.S. Corporate - Investment Grade Index | ||
| Average Annual Return, Percent | 4.78% | 0.76% | 2.44% |