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FINANCIAL HIGHLIGHTS - Summary of Financial Highlights (Details) - Franklin Responsibly Sourced Gold ETF [Member] - $ / shares
 3 Months Ended 6 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
COMBINED FINANCIAL HIGHLIGHTS [Abstract]        
Net asset value per Share, beginning of year (in Dollars per share) $ 43.82 $ 31.12 $ 41.54 $ 29.57
Net asset value per Share, end of year (in Dollars per share) $ 50.97 $ 35.1 $ 50.97 $ 35.1
Total return, at net asset value [1] 16.32% 12.79% 22.70% 18.70%
Ratio to average net assets(d)        
Net investment loss [2] (0.15%) (0.15%) (0.15%) (0.15%)
Net expenses [2] 0.15% 0.15% 0.15% 0.15%
Net investment loss (in Dollars per share) [3] $ (0.02) $ (0.01) $ (0.03) $ (0.02)
Net realized and unrealized gain (loss) on investment in gold (in Dollars per share) 7.17 3.99 9.46 5.55
Net change in net assets from operations (in Dollars per share) [4] $ 7.15 $ 3.98 $ 9.43 $ 5.53
[1] Calculation based on the change in net asset value of a Share during the period. Total return for periods of less than a year are not annualized.
[2] Annualized.
[3] Calculated using average Shares outstanding.
[4] The amount shown for a share outstanding may not agree with the change in the aggregate gains and losses on investment for the period because of the timing of transactions in the Fund’s shares in relation to fluctuating market values for the Fund’s underlying investment.