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Contracts and Agreements (Tables) | 6 Months Ended
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Jun. 30, 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 six months ended |  |  | For the six months ended |
|  | June 30, 2015 |  |  | June 30, 2014 |
Total commissions accrued to brokers |  | $ | 2,282,032 |  |  | $ | 411,154 |
Total commissions as an annualized percentage of average total net assets |  |  | 0.19 | % |  |  | 0.13 | %
Commissions accrued as a result of rebalancing |  | $ | 1,877,665 |  |  | $ | 240,185 |
Percentage of commissions accrued as a result of rebalancing |  |  | 82.28 | % |  |  | 58.42 | %
Commissions accrued as a result of creation and redemption activity |  | $ | 404,367 |  |  | $ | 170,969 |
Percentage of commissions accrued as a result of creation and redemption activity |  |  | 17.72 | % |  |  | 41.58 | %

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