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ORGANIZATION AND BUSINESS (Details)
 1 Months Ended 9 Months Ended
Apr. 30, 2006
USD ($)
$ / shares
shares
Sep. 30, 2021
$ / shares
$ / item
shares
Jun. 30, 2021
$ / shares
Dec. 31, 2020
$ / shares
Sep. 30, 2020
$ / shares
Jun. 30, 2020
$ / shares
Apr. 28, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
Organization, Consolidation and Presentation of Financial Statements Disclosure                
Number of successive valuation days   30 days            
Average daily percentage change in the price of the Benchmark Futures Contract considered   10.00%            
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / item   1,000            
Number of shares issued   185,362,500         1,482,900,000  
Number of shares outstanding   185,362,500         1,482,900,000  
Common Stock, Par or Stated Value Per Share | $ / shares   $ 16.35         $ 2.04  
Limited Partners' Capital Account, Units Authorized 17,000,000 5,627,000,000            
Net asset value per unit | $ / shares $ 67.39 $ 52.65 $ 49.87 $ 33.07 $ 28.49 $ 28.02   $ 102.27
Limited Partners' Capital Account, Units Issued 200,000              
Value of units issued | $ $ 13,479,000              
Number of share held for contract   35,456            
Creation Baskets                
Organization, Consolidation and Presentation of Financial Statements Disclosure                
Number of units per basket   100,000            
Redemption Baskets                
Organization, Consolidation and Presentation of Financial Statements Disclosure                
Number of units per basket   100,000