v3.25.2
Combined Statement of Operations
 3 Months Ended
Jun. 30, 2025
USD ($)
$ / shares
Expenses:  
Sponsor's fee $ 13,393
Less waiver 0
Total expenses 13,393
Net investment loss (13,393)
Net realized and change in unrealized gain (loss) on investment in ether:  
Net realized gain (loss) on investment in ether (1,744,386)
Net change in unrealized appreciation (depreciation) on investment in ether 8,944,706
Net realized and change in unrealized gain (loss) on investment in ether 7,200,320
Net increase (decrease) in net assets resulting from operations $ 7,186,927
Net increase (decrease) in net assets per Share (in Dollars per share) | $ / shares $ 4.25 [1]
Franklin Ethereum ETF [Member]  
Expenses:  
Sponsor's fee $ 13,393
Less waiver 0
Total expenses 13,393
Net investment loss (13,393)
Net realized and change in unrealized gain (loss) on investment in ether:  
Net realized gain (loss) on investment in ether (1,744,386)
Net change in unrealized appreciation (depreciation) on investment in ether 8,944,706
Net realized and change in unrealized gain (loss) on investment in ether 7,200,320
Net increase (decrease) in net assets resulting from operations $ 7,186,927
Net increase (decrease) in net assets per Share (in Dollars per share) | $ / shares $ 4.25 [1]
[1] Net increase (decrease) in net assets per Share based on average shares outstanding during the period.