| Label | Element | Value |
|---|---|---|
| Franklin International Aggregate Bond ETF | Sovereign Bonds [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 81.50% |
| Franklin International Aggregate Bond ETF | Corporate Bonds & Notes [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 7.90% |
| Franklin International Aggregate Bond ETF | Short-Term Investments [Member] | ||
| Holdings [Line Items] | oef_HoldingsLineItems | |
| Percent of Total Investments | oef_PctOfTotalInv | 10.60% |