v3.25.3
Combined Statements of Assets and Liabilities (Parentheticals) - USD ($)
 6 Months Ended 12 Months Ended
Sep. 30, 2025
Mar. 31, 2025
Cost of investment $ 286,845,363 $ 145,309,087
Common stock, no par value (in Dollars per share) $ 0 $ 0
Common stock, shares authorized, unlimited Unlimited Unlimited
Franklin Responsibly Sourced Gold ETF [Member]    
Cost of investment $ 286,845,363 $ 145,309,087
Common stock, no par value (in Dollars per share) $ 0 $ 0
Common stock, shares authorized, unlimited Unlimited Unlimited