v3.26.1
Shareholder Report, Average Annual Return (Details) 1014045_Franklin Systematic Style Premia ETF_Single Class_TSR Annual {Single Class}
12 Months Ended 60 Months Ended 75 Months Ended
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Franklin Systematic Style Premia ETF      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Franklin Systematic Style Premia ETF (NAV)    
Average Annual Return, Percent 13.73% 8.63% 4.00%
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% 13.20%
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% 0.90%
ICE BofA U.S. 3-Month Treasury Bill Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name ICE BofA U.S. 3-Month Treasury Bill Index    
Average Annual Return, Percent 4.00% 3.34% 2.77%