| Activity in Ether [Table Text Block] |
| Three Months Ended June 30, 2026 | | Quantity | | | Cost | | | Fair
Value | | | Realized
Gain (Loss) | |
| Beginning balance | | | 194,989 | | | $ | 405,833,590 | | | $ | 409,835,035 | | | $ | — | |
| Ether purchased(a) | | | 126,711 | | | | 273,515,403 | | | | 273,515,403 | | | | — | |
| Ether sold for the redemption of shares(b) | | | (33,018 | ) | | | (69,087,258 | ) | | | (57,766,222 | ) | | | (11,321,036 | ) |
| Ether sold to pay expenses | | | (67 | ) | | | (147,564 | ) | | | (134,290 | ) | | | (13,274 | ) |
| Ether sold for distributions | | | (198 | ) | | | (438,770 | ) | | | (351,675 | ) | | | (87,095 | ) |
| Net realized loss | | | — | | | | — | | | | (11,421,405 | ) | | | — | |
| Net change in unrealized appreciation/depreciation | | | — | | | | — | | | | (154,226,015 | ) | | | — | |
| Ending balance | | | 288,417 | | | $ | 609,675,401 | | | $ | 459,450,831 | | | $ | (11,421,405 | ) |
| Period from January 14, 2026 (Date of Seeding) to June 30, 2026 | | Quantity | | | Cost | | | Fair
Value | | | Realized
Gain (Loss) | |
| Beginning balance | | | — | | | $ | — | | | $ | — | | | $ | — | |
| Ether purchased(a) | | | 322,214 | | | | 680,416,742 | | | | 680,416,742 | | | | — | |
| Ether sold for the redemption of shares(b) | | | (33,532 | ) | | | (70,155,007 | ) | | | (58,804,900 | ) | | | (11,350,107 | ) |
| Ether sold to pay expenses | | | (67 | ) | | | (147,564 | ) | | | (134,290 | ) | | | (13,274 | ) |
| Ether sold for distributions | | | (198 | ) | | | (438,770 | ) | | | (351,675 | ) | | | (87,095 | ) |
| Net realized loss | | | — | | | | — | | | | (11,450,476 | ) | | | — | |
| Net change in unrealized appreciation/depreciation | | | — | | | | — | | | | (150,224,570 | ) | | | — | |
| Ending balance | | | 288,417 | | | $ | 609,675,401 | | | $ | 459,450,831 | | | $ | (11,450,476 | ) |
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