COMBINED STATEMENTS OF CHANGES IN NET ASSETS (Parentheticals)				8 Months Ended
		Jun. 27, 2024 USD ($) Ethereum CreationUnits $ / item shares	May 21, 2024 USD ($) $ / shares shares	Mar. 31, 2025 USD ($) Ethereum shares	Jul. 22, 2024 Ethereum
Stock issued during the period shares new issues | shares				1,750,000
Proceeds from issuance of Shares				$ 42,553,442
Redemption of Shares	[1]			$ 6,326,233
Number of Ether per creation unit		380
Number of Ether per share		0.0076
Quantity of ether | Ethereum		760		11,780.2062	760
Cost of Ether per unit (in dollars per Item) | $ / item		3,446.37
Initial Seed Shares [Member]
Stock issued during the period shares new issues | shares			4,000
Shares issued, price per share | $ / shares			$ 25
Proceeds from issuance of Shares			$ 100,000
Redemption of Shares		$ 100,000
Seed Creation Units [Member]
Stock issued during the period shares new issues | shares		100,000
Proceeds from issuance of Shares		$ 2,619,241.2
Number of seed creation units issued | CreationUnits		2
Franklin Ethereum ETF [Member]
Stock issued during the period shares new issues | shares				1,750,000
Proceeds from issuance of Shares				$ 42,553,442
Redemption of Shares	[2]			$ 6,326,233
Number of Ether per creation unit		380
Number of Ether per share		0.0076
Quantity of ether | Ethereum		760		11,780.2062	760
Cost of Ether per unit (in dollars per Item) | $ / item		3,446.37
Franklin Ethereum ETF [Member] | Initial Seed Shares [Member]
Stock issued during the period shares new issues | shares			4,000
Shares issued, price per share | $ / shares			$ 25
Proceeds from issuance of Shares			$ 100,000
Redemption of Shares		$ 100,000
Franklin Ethereum ETF [Member] | Seed Creation Units [Member]
Stock issued during the period shares new issues | shares		100,000
Proceeds from issuance of Shares		$ 2,619,241.2
Number of seed creation units issued | CreationUnits		2

[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.