v3.26.1
Shareholder Report, Line Graph (Details) 1014025_Franklin FTSE Europe 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
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Nov. 02, 2017
Mar. 31, 2026
Franklin FTSE Europe ETF                    
Account Value [Line Items]                    
Line Graph and Table Measure Name                   Franklin FTSE Europe ETF (NAV)
Accumulated Value $ 15,312 $ 14,268 $ 12,432 $ 12,270 $ 11,879 $ 8,123 $ 9,607 $ 9,974 $ 10,000 $ 18,340
FTSE Developed Europe Index-NR [Member]                    
Account Value [Line Items]                    
Line Graph and Table Measure Name                   FTSE Developed Europe Index-NR
Accumulated Value 15,029 14,019 12,242 12,158 11,793 8,080 9,574 9,955 10,000 $ 17,947
FTSE Developed Europe Capped Index-NR [Member]                    
Account Value [Line Items]                    
Line Graph and Table Measure Name                   FTSE Developed Europe Capped Index-NR
Accumulated Value $ 15,029 $ 14,019 $ 12,242 $ 12,158 $ 11,793 $ 8,080 $ 9,574 $ 9,955 $ 10,000 $ 17,947