Combined Statements of Changes in Net Assets - USD ($)		2 Months Ended	3 Months Ended	6 Months Ended
		Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2025
Net assets, beginning of period		$ 2,621,065	$ 35,123,473	$ 21,605,398
Net investment loss		0	(36,550)	(49,943)
Net realized gain (loss) on investment in ether		(194,831)	4,651,711	2,907,325
Net change in unrealized appreciation (depreciation) on investment in ether		(6,777,145)	22,241,151	31,185,857
Net increase (decrease) in net assets resulting from operations		(6,971,976)	26,856,312	34,043,239
Increase (decrease) in net assets from capital share transactions:
Contributions for Shares issued	[1]	36,336,503	51,841,850	59,957,569
Distributions for Shares redeemed		(1,022,569)	(22,896,308)	(24,680,879)
Net increase (decrease) in net assets resulting from capital share transactions		35,313,934	28,945,542	35,276,690
Net assets, end of period		30,963,023	90,925,327	90,925,327
Franklin Ethereum ETF [Member]
Net assets, beginning of period		2,621,065	35,123,473	21,605,398
Net investment loss		0	(36,550)	(49,943)
Net realized gain (loss) on investment in ether		(194,831)	4,651,711	2,907,325
Net change in unrealized appreciation (depreciation) on investment in ether		(6,777,145)	22,241,151	31,185,857
Net increase (decrease) in net assets resulting from operations		(6,971,976)	26,856,312	34,043,239
Increase (decrease) in net assets from capital share transactions:
Contributions for Shares issued	[2]	36,336,503	51,841,850	59,957,569
Distributions for Shares redeemed		(1,022,569)	(22,896,308)	(24,680,879)
Net increase (decrease) in net assets resulting from capital share transactions		35,313,934	28,945,542	35,276,690
Net assets, end of period		$ 30,963,023	$ 90,925,327	$ 90,925,327

[1] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.

[2] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.