Label	Element	Value
BrandywineGLOBAL - U.S. Fixed Income ETF \| U.S. Government & Agency Obligations [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	58.30%
BrandywineGLOBAL - U.S. Fixed Income ETF \| Mortgage-Backed Securities [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	25.50%
BrandywineGLOBAL - U.S. Fixed Income ETF \| Corporate Bonds & Notes [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	8.80%
BrandywineGLOBAL - U.S. Fixed Income ETF \| Collateralized Mortgage Obligations [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	4.00%
BrandywineGLOBAL - U.S. Fixed Income ETF \| Asset-Backed Securities [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	1.40%
BrandywineGLOBAL - U.S. Fixed Income ETF \| Short-Term Investments [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	2.00%