Financial Highlights - Summary of Per Share Performance (Parenthetical) (Details)				2 Months Ended
		Jun. 27, 2024 USD ($) Ether $ / shares shares	May 21, 2024 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)
Financial Highlights [Line Items]
Proceeds from the issuance of common stock | $	[1]			$ 36,336,503
Initial Seed Shares [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares			4,000
Sale of stock issue price per share | $ / shares			$ 25
Proceeds from the issuance of common stock | $			$ 100,000
Payment to redeem common stock | $		$ 100,000	$ 100,000
Seed Creation Ether Units [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares		760
Sale of stock issue price per share | $ / shares		$ 3,446.37
Proceeds from the issuance of common stock | $		$ 2,619,241.2
Ratio per creation unit based on share price | Ether		380
Common Stock Backed Up By Units [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares		100,000
Creation Units Ether [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares		2
Franklin Ethereum ETF [Member]
Financial Highlights [Line Items]
Proceeds from the issuance of common stock | $	[1]			$ 36,336,503
Franklin Ethereum ETF [Member] | Initial Seed Shares [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares			4,000
Sale of stock issue price per share | $ / shares			$ 25
Proceeds from the issuance of common stock | $			$ 100,000
Payment to redeem common stock | $		$ 100,000	$ 100,000
Franklin Ethereum ETF [Member] | Seed Creation Ether Units [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares		760
Sale of stock issue price per share | $ / shares		$ 3,446.37
Proceeds from the issuance of common stock | $		$ 2,619,241.2
Ratio per creation unit based on share price | Ether		380
Franklin Ethereum ETF [Member] | Common Stock Backed Up By Units [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares		100,000
Franklin Ethereum ETF [Member] | Creation Units Ether [Member]
Financial Highlights [Line Items]
Stock issued during the period shares new issues | shares		2

[1] No comparative period presented as the Fund’s operations commenced on July 23, 2024.