Combined Statements of Assets and Liabilities (Parentheticals) - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
|
| Investment in ether, at cost | $ 42,429,783 | $ 37,851,948 |
| Common stock, no par value (in Dollars per share) | $ 0 | $ 0 |
| Common stock, shares authorized, unlimited (in Shares) | Unlimited | Unlimited |
| Franklin Ethereum ETF [Member] | ||
| Investment in ether, at cost | $ 42,429,783 | $ 37,851,948 |
| Common stock, no par value (in Dollars per share) | $ 0 | $ 0 |
| Common stock, shares authorized, unlimited (in Shares) | Unlimited | Unlimited |