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ORGANIZATION AND BUSINESS (Additional Information) (Detail)
 1 Months Ended
Apr. 10, 2006
USD ($)
$ / shares
shares
Dec. 31, 2018
$ / shares
$ / Unit
shares
Dec. 31, 2017
$ / shares
Dec. 31, 2016
$ / shares
Dec. 31, 2015
$ / shares
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]          
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit   1,000      
Limited Partners' Capital Account, Units Authorized 17,000,000 3,127,000,000      
Limited Partners' Capital Account, Units Issued 200,000        
Net asset value per unit | $ / shares $ 67.39 $ 9.59 $ 12.08 $ 11.71 $ 11.02
Value of units issued | $ $ 13,479,000        
Creation Baskets [Member]          
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]          
Number of units per basket   100,000      
Redemption Baskets [Member]          
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]          
Number of units per basket   100,000      
Open Futures Contracts, Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL November 2017 contracts, expiring October 2017 [Member]          
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]          
Number of Contracts [1]   32,340      
[1] Collateral amounted to $433,776,173 on open futures contracts.