Combined Schedules of Investments		Dec. 31, 2025 USD ($) Ethereum	Mar. 31, 2025 USD ($) Ethereum
Quantity of ether (in Ethereum) | Ethereum		19,348.465	11,780.2062
Total investments, Cost		$ 67,384,986	$ 37,851,948
Total investments, Fair Value	[1]	$ 57,494,931	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.02%	100.04%
Other assets less liabilities, Fair Value		$ (10,491)	$ (8,924)
Other assets less liabilities, Fair Value as a % of Net Assets		(0.02%)	(0.04%)
Net assets		$ 57,484,440	$ 21,605,398
Net assets, Fair Value as a % of Net Assets		100.00%	100.00%
Franklin Ethereum ETF [Member]
Quantity of ether (in Ethereum) | Ethereum		19,348.465	11,780.2062
Total investments, Cost		$ 67,384,986	$ 37,851,948
Total investments, Fair Value	[1]	$ 57,494,931	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.02%	100.04%
Other assets less liabilities, Fair Value		$ (10,491)	$ (8,924)
Other assets less liabilities, Fair Value as a % of Net Assets		(0.02%)	(0.04%)
Net assets		$ 57,484,440	$ 21,605,398
Net assets, Fair Value as a % of Net Assets		100.00%	100.00%
Ethereum [Member]
Quantity of ether (in Ethereum) | Ethereum		19,348.465	11,780.2062
Total investments, Cost		$ 67,384,986	$ 37,851,948
Total investments, Fair Value		$ 57,494,931	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.02%	100.04%
Ethereum [Member] | Franklin Ethereum ETF [Member]
Quantity of ether (in Ethereum) | Ethereum		19,348.465	11,780.2062
Total investments, Cost		$ 67,384,986	$ 37,851,948
Total investments, Fair Value		$ 57,494,931	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.02%	100.04%

[1] Cost of investment in ether: $67,384,986 at December 31, 2025 and $37,851,948 at March 31, 2025.