Combined Statements of Cash Flows - USD ($)	3 Months Ended		5 Months Ended	9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2025
Cash Flows from Operating Activities:
Net increase (decrease) in net assets resulting from operations	$ (24,520,801)	$ 8,501,878	$ 1,529,902	$ 9,522,438
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of ether			(42,553,442)	(72,528,985)
Sales of ether			4,901,065	44,007,163
Net realized (gain) loss on investment in ether	(353,054)	(215,469)	(20,638)	(3,260,379)
Net change in unrealized (appreciation) depreciation on investment in ether	24,838,286	(8,286,409)	(1,509,264)	(6,347,571)
Change in operating assets and liabilities:
Sponsor’s fee payable			0	1,567
Net cash provided by (used in) operating activities			(37,652,377)	(28,605,767)
Cash Flows from Financing Activities:
Proceeds from issuance of Shares			42,553,442	72,528,985
Payments on Shares redeemed			(4,901,065)	(43,923,218)
Net cash provided by (used in) financing activities			37,652,377	28,605,767
Cash
Net increase in cash			0	0
Cash, beginning of period			0	0
Cash, end of period	0	0	0	0
Franklin Ethereum ETF [Member]
Cash Flows from Operating Activities:
Net increase (decrease) in net assets resulting from operations	(24,520,801)	8,501,878	1,529,902	9,522,438
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of ether			(42,553,442)	(72,528,985)
Sales of ether			4,901,065	44,007,163
Net realized (gain) loss on investment in ether	(353,054)	(215,469)	(20,638)	(3,260,379)
Net change in unrealized (appreciation) depreciation on investment in ether	24,838,286	(8,286,409)	(1,509,264)	(6,347,571)
Change in operating assets and liabilities:
Sponsor’s fee payable			0	1,567
Net cash provided by (used in) operating activities			(37,652,377)	(28,605,767)
Cash Flows from Financing Activities:
Proceeds from issuance of Shares			42,553,442	72,528,985
Payments on Shares redeemed			(4,901,065)	(43,923,218)
Net cash provided by (used in) financing activities			37,652,377	28,605,767
Cash
Net increase in cash			0	0
Cash, beginning of period			0	0
Cash, end of period	$ 0	$ 0	$ 0	$ 0