v3.26.1
Related Parties - Additional Information (Detail)
shares in Thousands
3 Months Ended 6 Months Ended
Nov. 24, 2025
USD ($)
Nov. 20, 2025
Jun. 30, 2026
USD ($)
Right
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Right
shares
Jun. 30, 2025
USD ($)
Right
Dec. 31, 2025
USD ($)
Right
shares
Related Party Transaction [Line Items]              
Number of Incidental Rights held | Right     0   0   0
Number of Incidental Rights distributed | Right         0 0  
Sponsor's Fee payable, related party     $ 0   $ 0   $ 0
Sponsor Fees     57,000 $ 76,000 172,000 $ 158,000  
Additional trust expenses paid by sponsor     0 0 0 0  
Related Party              
Related Party Transaction [Line Items]              
Related party sponsor fee percentage 0.35%            
Related Party Transaction, Rate 0.35%            
Sponsor's Fees incurred     $ 56,838,000 $ 75,761,000 $ 79,320,000 $ 157,158,000  
Net Assets Value Trust Exceeds Value $ 1,000,000,000            
Sponsor              
Related Party Transaction [Line Items]              
Shares of the Trust, held by related parties | shares     5,310   5,310   48,162
Related party sponsor fee percentage 0.35% 0.35%          
Related party maximum transaction in a fiscal year         $ 600,000    
Related Party Transaction, Rate 0.35% 0.35%          
Sponsor's Fee payable, related party     $ 0   0   $ 0
Sponsor | Maximum              
Related Party Transaction [Line Items]              
Related party sponsor fee percentage 2.50%            
Related Party Transaction, Rate 2.50%            
Sponsor | Minimum              
Related Party Transaction [Line Items]              
Related party sponsor fee percentage 0.35%            
Related Party Transaction, Rate 0.35%            
Non Sponsor Paid Expenses              
Related Party Transaction [Line Items]              
Related party maximum transaction in a fiscal year         $ 600,000