Combined Schedules of Investments		Sep. 30, 2025 USD ($) Ethereum	Mar. 31, 2025 USD ($) Ethereum
Quantity of ether (in Ethereum) | Ethereum		22,020.1883	11,780.2062
Total investments, Cost		$ 76,013,644	$ 37,851,948
Total investments, Fair Value	[1]	$ 90,961,875	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.04%	100.04%
Less liabilities, Fair Value		$ (36,548)	$ (8,924)
Less liabilities, Fair Value as a % of Net Assets		(0.04%)	(0.04%)
Net assets		$ 90,925,327	$ 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		22,020.1883	11,780.2062
Total investments, Cost		$ 76,013,644	$ 37,851,948
Total investments, Fair Value	[1]	$ 90,961,875	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.04%	100.04%
Less liabilities, Fair Value		$ (36,548)	$ (8,924)
Less liabilities, Fair Value as a % of Net Assets		(0.04%)	(0.04%)
Net assets		$ 90,925,327	$ 21,605,398
Net assets, Fair Value as a % of Net Assets		100.00%	100.00%
Ethereum [Member]
Quantity of ether (in Ethereum) | Ethereum		22,020.1883	11,780.2062
Total investments, Cost		$ 76,013,644	$ 37,851,948
Total investments, Fair Value		$ 90,961,875	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.04%	100.04%
Ethereum [Member] | Franklin Ethereum ETF [Member]
Quantity of ether (in Ethereum) | Ethereum		22,020.1883	11,780.2062
Total investments, Cost		$ 76,013,644	$ 37,851,948
Total investments, Fair Value		$ 90,961,875	$ 21,614,322
Total investments, Fair Value as a % of Net Assets		100.04%	100.04%

[1] Cost of investment in ether: $76,013,644 at September 30, 2025 and $37,851,948 at March 31, 2025.