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Contracts and Agreements (Tables) | 3 Months Ended
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Mar. 31, 2015
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 three months ended |  |  | For the three months ended |
|  | March 31, 2015 |  |  | March 31, 2014 |
Total commissions accrued to brokers |  | $ | 1,187,217 |  |  | $ | 264,164 |
Total commissions as an annualized percentage of average total net assets |  |  | 0.21 | % |  |  | 0.16 | %
Commissions accrued as a result of rebalancing |  | $ | 958,970 |  |  | $ | 132,435 |
Percentage of commissions accrued as a result of rebalancing |  |  | 80.77 | % |  |  | 50.13 | %
Commissions accrued as a result of creation and redemption activity |  | $ | 228,247 |  |  | $ | 131,729 |
Percentage of commissions accrued as a result of creation and redemption activity |  |  | 19.23 | % |  |  | 49.87 | %

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- Definition Tabular disclosure of fees earned by the broker commission. + References No definition available. + Details
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