v3.26.1
COMBINED STATEMENTS OF CHANGES IN NET ASSETS (Parentheticals)
 8 Months Ended 12 Months Ended
Jun. 27, 2024
USD ($)
Ethereum
CreationUnits
$ / item
shares
May 21, 2024
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
Ethereum
shares
Mar. 31, 2026
USD ($)
Ethereum
shares
Jul. 22, 2024
Ethereum
Stock issued during the period shares new issues (in Shares) | shares     1,750,000 2,850,000  
Proceeds from issuance of Shares $ 2,619,241.2   $ 42,553,442 $ 75,689,578  
Redemption of Shares [1]     $ 6,326,233 $ 46,977,953  
Number of Ether per creation unit 380        
Number of Ether per share 0.0076        
Quantity of ether (in Ethereum) | Ethereum 760   11,780.2062 20,095.4606 760
Quantity of ether purchased (in Ethereum) | Ethereum 760   13,300 21,636.6183  
Cost of Ether per unit (in Dollars per Item) | $ / item 3,446.37        
Franklin Ethereum ETF [Member]          
Stock issued during the period shares new issues (in Shares) | shares     1,750,000 2,850,000  
Proceeds from issuance of Shares $ 2,619,241.2   $ 42,553,442 $ 75,689,578  
Redemption of Shares [2]     $ 6,326,233 $ 46,977,953  
Number of Ether per creation unit 380        
Number of Ether per share 0.0076        
Quantity of ether (in Ethereum) | Ethereum 760   11,780.2062 20,095.4606 760
Quantity of ether purchased (in Ethereum) | Ethereum 760   13,300 21,636.6183  
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 (in Shares) | shares   4,000      
Shares issued, price per share (in Dollars per share) | $ / shares   $ 25      
Proceeds from issuance of Shares   $ 100,000      
Redemption of Shares $ 100,000        
Initial Seed Shares [Member] | Franklin Ethereum ETF [Member]          
Stock issued during the period shares new issues (in Shares) | shares   4,000      
Shares issued, price per share (in Dollars 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 (in Shares) | shares 100,000        
Proceeds from issuance of Shares $ 2,619,241.2        
Number of seed creation units issued (in CreationUnits) | CreationUnits 2        
Number of Ether per creation unit 380        
Number of Ether per share 0.0076        
Quantity of ether (in Ethereum) | Ethereum 760        
Seed Creation Units [Member] | Franklin Ethereum ETF [Member]          
Stock issued during the period shares new issues (in Shares) | shares 100,000        
Proceeds from issuance of Shares $ 2,619,241.2        
Number of seed creation units issued (in CreationUnits) | CreationUnits 2        
Number of Ether per creation unit 380        
Number of Ether per share 0.0076        
Quantity of ether (in Ethereum) | Ethereum 760        
[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.