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ORGANIZATION AND BUSINESS (Details)
 1 Months Ended 3 Months Ended
Apr. 30, 2006
USD ($)
$ / shares
shares
Mar. 31, 2021
$ / shares
$ / item
shares
Dec. 31, 2020
$ / shares
 [1]
Apr. 28, 2020
$ / shares
shares
Mar. 31, 2020
$ / shares
 [1]
Dec. 31, 2019
$ / shares
 [1]
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 $ 40.40 [1] $ 33.07   $ 33.94 $ 102.27
Limited Partners' Capital Account, Units Issued 200,000          
Value of units issued | $ $ 13,479,000          
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        
[1] On April 28, 2020, there was a 1-for-8 reverse share split. The Financial Highlights have been adjusted for the period shown to reflect the 1-for-8 reverse share split on retroactive basis.