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CONTRACTS AND AGREEMENTS (Tables)
 12 Months Ended
Dec. 31, 2018
Contractors [Abstract]  
Brokerage Commission
USO also incurs commissions to brokers for the purchase and sale of Oil Futures Contracts, Other Oil-Related Investments or short-term obligations of the United States of two years or less (“Treasuries”).
 
 
 
For the Year Ended 

December 31, 2018
 
 
For the Year Ended 

December 31, 2017
 
 
For the Year Ended 

December 31, 2016
 
Total commissions accrued to brokers
 
$
2,538,611
 
 
$
4,675,687
 
 
$
6,875,314
 
Total commissions as annualized percentage of average total net assets
 
 
0.14
%
 
 
0.18
%
 
 
0.20
%
Commissions accrued as a result of rebalancing
 
$
2,145,268
 
 
$
4,112,340
 
 
$
6,297,055
 
Percentage of commissions accrued as a result of rebalancing
 
 
84.51
%
 
 
87.95
%
 
 
91.59
%
Commissions accrued as a result of creation and redemption activity
 
$
393,343
 
 
$
563,347
 
 
$
578,259
 
Percentage of commissions accrued as a result of creation and redemption activity
 
 
15.49
%
 
 
12.05
%
 
 
8.41
%