v3.25.2
INVESTMENT IN ETHER - Schedule of Changes in Quantity of Ether Held (Details) - Franklin Ethereum ETF [Member]
 3 Months Ended
Jun. 30, 2025
USD ($)
Ethereum
INVESTMENT IN ETHER [Abstract]  
Beginning balance (in Ethereum) | Ethereum 11,780.2062
Beginning balance of fair value $ 21,614,322 [1]
Ether purchased for the creation of Shares (in Ethereum) | Ethereum 3,417.9518
Ether purchased for the creation of Shares $ 8,115,719
Ether sold for the redemption of Shares (in Ethereum) | Ethereum (1,139.3693)
Ether sold for the redemption of Shares $ (1,784,571)
Principal on ether sales to pay expenses (in Ethereum) | Ethereum (5.786)
Principal on ether sales to pay expenses $ (8,927)
Net realized gain (loss) from ether sold for the redemption of shares (1,744,386)
Net change in unrealized appreciation (depreciation) on investment in ether $ 8,944,706
Ending balance (in Ethereum) | Ethereum 14,053.0027
Ending balance of fair value $ 35,136,863 [1]
[1] Cost of investment in ether: $42,429,783 at June 30, 2025 and $37,851,948 at March 31, 2025.