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CONTRACTS AND AGREEMENTS (Tables) | 12 Months Ended
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Dec. 31, 2018
Contractors [Abstract] |
Brokerage Commissions | USL 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 |  | $ | 6,045 |  |  | $ | 17,897 |  |  | $ | 22,207 |
Total commissions as annualized percentage of average total net assets |  |  | 0.01 | % |  |  | 0.02 | % |  |  | 0.02 | %
Commissions accrued as a result of rebalancing |  | $ | 4,961 |  |  | $ | 13,735 |  |  | $ | 17,872 |
Percentage of commissions accrued as a result of rebalancing |  |  | 82.07 | % |  |  | 76.74 | % |  |  | 80.48 | %
Commissions accrued as a result of creation and redemption activity |  | $ | 1,084 |  |  | $ | 4,162 |  |  | $ | 4,335 |
Percentage of commissions accrued as a result of creation and redemption activity |  |  | 17.93 | % |  |  | 23.26 | % |  |  | 19.52 | %

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