v3.26.1
COMBINED FINANCIAL HIGHLIGHTS (Tables)
 12 Months Ended
Mar. 31, 2026
COMBINED FINANCIAL HIGHLIGHTS [Abstract]  
Schedule of Financial Highlights
         
    
For the Year
Ended
March 31, 2026
    
For the period July 23, 2024
(Date of
commencement of
operations) through March
31, 2025
 
           
Net asset value per Share, beginning of year
 $13.94   $26.21 (a)
Net investment loss(b)
  (0.04)    (0.01) 
Net realized and unrealized gain (loss) on investment in ether(c)
   2.04    (12.26) 
Net change in net assets from operations
  2.00    (12.27) 
Net asset value per Share, end of year
 $15.94   $13.94 
           
Total return, at net asset value(e)
  14.35%   (46.81)%(d)
           
Ratio to average net assets
         
Net investment loss
  (0.19)%   (0.04)%(f)
Gross expenses
 0.19%  0.19%(f)
Net expenses
 0.19%  0.04%(f)
 
(a)
The amount shown represents the NAV per share at commencement of the Fund’s investment operations. This amount includes proceeds to the Fund from the initial ether seed creation transaction conducted on June 27, 2024. Prior to June 27, 2024, 4,000 shares were acquired on May 21, 2024 at per share value of $25. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On June 27, 2024, the Initial Seed Shares were redeemed for $100,000 and the Seed Capital Investor purchased two creation units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 380 ether per Creation Unit (or 0.0076 ether per Share), for a total of 760 ether (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 760 ether at the price of $3,446.37 per ether on June 27, 2024 (exclusive of transaction and other costs incurred in connection with the conversion of the cash proceeds to ether, which were paid by the Seed Capital Investor). Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,619,241.20 (an amount representing 760 ether).
 
(b)
Calculated using average Shares outstanding
 
(c)
The amount shown for a share outstanding may not agree with the change in the aggregate gains and losses on investment for the period because of the timing of transactions in the Fund’s shares in relation to fluctuating market values for the Fund’s underlying investment.
 
(d)
Percentage is not annualized.
 
(e)
Total Return at NAV is calculated assuming an initial investment made at the NAV at the beginning of the period, and redemption of Shares at NAV on the last day of the period. Total Return at NAV as shown above includes adjustments in accordance with U.S. GAAP.
 
(f)
Annualized.
Franklin Ethereum ETF [Member]  
COMBINED FINANCIAL HIGHLIGHTS [Abstract]  
Schedule of Financial Highlights
         
         
         
         
         
    
For the Year
Ended
March 31, 2026
    
For the period July 23, 2024
(Date of
commencement of
operations) through March
31, 2025
 
           
Net asset value per Share, beginning of year
 $13.94   $26.21 (a)
Net investment loss(b)
  (0.04)    (0.01) 
Net realized and unrealized gain (loss) on investment in ether(c)
   2.04    (12.26) 
Net change in net assets from operations
  2.00    (12.27) 
Net asset value per Share, end of year
 $15.94   $13.94 
           
Total return, at net asset value(e)
  14.35%   (46.81)%(d)
           
Ratio to average net assets
         
Net investment loss
  (0.19)%  (0.04)%(f)
Gross expenses
 0.19%  0.19%(f)
Net expenses
 0.19%  0.04%(f)
 
(a)
The amount shown represents the NAV per share at commencement of the Fund’s investment operations. This amount includes proceeds to the Fund from the initial ether seed creation transaction conducted on June 27, 2024. Prior to June 27, 2024, 4,000 shares were acquired on May 21, 2024 at per share value of $25. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On June 27, 2024, the Initial Seed Shares were redeemed for $100,000 and the Seed Capital Investor purchased two creation units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 380 ether per Creation Unit (or 0.0076 ether per Share), for a total of 760 ether (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 760 ether at the price of $3,446.37 per ether on June 27, 2024 (exclusive of transaction and other costs incurred in connection with the conversion of the cash proceeds to ether, which were paid by the Seed Capital Investor). Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,619,241.20 (an amount representing 760 ether).
(b)
Calculated using average Shares outstanding
(c)
The amount shown for a share outstanding may not agree with the change in the aggregate gains and losses on investment for the period because of the timing of transactions in the Fund’s shares in relation to fluctuating market values for the Fund’s underlying investment.
(d)
Percentage is not annualized.
(e)
Total Return at NAV is calculated assuming an initial investment made at the NAV at the beginning of the period, and redemption of Shares at NAV on the last day of the period. Total Return at NAV as shown above includes adjustments in accordance with U.S. GAAP.
(f)
Annualized.