SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) |
3 Months Ended | 8 Months Ended |
|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
|
| SIGNIFICANT ACCOUNTING POLICIES [Abstract] | ||
| Sponsor's fee rate | 0.19% | |
| Accrued sponsor fee | $ 13,390 | |
| Extraordinary or non-routine expenses | $ 0 | $ 0 |
| Franklin Ethereum ETF [Member] | ||
| SIGNIFICANT ACCOUNTING POLICIES [Abstract] | ||
| Sponsor's fee rate | 0.19% | |
| Accrued sponsor fee | $ 13,390 | |
| Extraordinary or non-routine expenses | 0 | 0 |
| Maximum [Member] | ||
| SIGNIFICANT ACCOUNTING POLICIES [Abstract] | ||
| Ordinary legal fees and expenses assumed by the Sponsor | 500,000 | 500,000 |
| Maximum [Member] | Franklin Ethereum ETF [Member] | ||
| SIGNIFICANT ACCOUNTING POLICIES [Abstract] | ||
| Ordinary legal fees and expenses assumed by the Sponsor | $ 500,000 | $ 500,000 |