v3.26.1
INVESTMENT IN SOLANA - Changes in Quantity of Solana Held (Details) - Franklin Solana ETF [Member]
 3 Months Ended
Nov. 25, 2025
Solana
Jun. 30, 2026
USD ($)
Solana
INVESTMENT IN SOLANA [Abstract]    
Beginning Balance, Quantity of Solana (in Solana) | Solana   112,336.0666
Beginning Balance, Amount [1]   $ 9,365,458
Solana purchased for the creation of Shares, Quantity of Solana (in Solana) | Solana 17,000 0
Solana purchased for the creation of Shares, Amount   $ 0
Solana sold for the redemption of Shares, Quantity of Solana (in Solana) | Solana   0
Solana sold for the redemption of Shares, Amount   $ 0
Principal on Solana sales to pay expenses, Quantity of Solana (in Solana) | Solana   0
Principal on Solana sales to pay expenses, Amount   $ 0
Staking income, Quantity of Solana (in Solana) | Solana   1,584.4428
Staking income, Amount   $ 128,150
Distribution of staking income to Shareholders, Quantity of Solana (in Solana) | Solana   (853.4439)
Distribution of staking income to Shareholders, Amount [2],[3]   $ (66,090)
Net realized gain (loss) from Solana sold for the redemption of Shares, Amount   0
Net realized gain (loss) from Solana sold for distribution of staking income, Amount   (26,368)
Net change in unrealized appreciation (depreciation) on investment in Solana, Amount   $ (879,285)
Ending Balance, Quantity of Solana (in Solana) | Solana 17,000 113,067.0655
Ending Balance, Amount [1]   $ 8,521,865
[1] Cost of investment in Solana: $12,227,591 at June 30, 2026 and $12,191,899 at March 31, 2026.
[2] Dollar amount of balance represents the cumulative fair value of creation of Shares less the redemption of Shares, at the time of the specific creation or redemption.
[3] No comparative period presented as the Fund’s operations commenced on December 3, 2025.