SIGNIFICANT ACCOUNTING POLICIES (Details)	8 Months Ended
	Mar. 31, 2025 USD ($)
Significant Accounting Policies [Abstract]
Sponsor's fee rate	0.19%
Initial value of the funds assets on the basis of which fees is determined	$ 10,000,000,000
Sponsor's fee	44,677
Waiver	35,753
Sponsor's fee payable	8,924
Extraordinary or non-routine expenses	$ 0
Franklin Ethereum ETF [Member]
Significant Accounting Policies [Abstract]
Sponsor's fee rate	0.19%
Initial value of the funds assets on the basis of which fees is determined	$ 10,000,000,000
Sponsor's fee	44,677
Waiver	35,753
Sponsor's fee payable	8,924
Extraordinary or non-routine expenses	0
Maximum [Member]
Significant Accounting Policies [Abstract]
Ordinary legal fees and expenses assumed by the Sponsor	500,000
Maximum [Member] | Franklin Ethereum ETF [Member]
Significant Accounting Policies [Abstract]
Ordinary legal fees and expenses assumed by the Sponsor	$ 500,000