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FINANCIAL HIGHLIGHTS (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Jun. 02, 2010
Per Unit Operating Performance: |  |  |  |  |
Net asset value, beginning of year | $ 74.54 | $ 63.08 | $ 50.00 | [1] | $ 50.00
Total income (loss) | $ 8.19 | $ 12.17 | $ 13.40 | [1] |
Net expenses | $ (0.78) | $ (0.71) | $ (0.32) | [1] |
Net increase in net asset value | $ 7.41 | $ 11.46 | $ 13.08 | [1] |
Net asset value, end of year | $ 81.95 | $ 74.54 | $ 63.08 |  | $ 50.00
Total Return | 9.94% | 18.17% | 26.16% | [1] |
Ratios to Average Net Assets |  |  |  |  |
Total income (loss) | 9.44% | 16.11% | 24.52% | [1] |
Management fees | 0.75% | 0.75% | 0.75% | [1],[2] |
Total expenses excluding management fees | 0.32% | 0.43% | 2.02% | [1],[2] |
Expenses waived | (0.09%) | (0.24%) | (1.78%) | [1],[2] |
Net expenses excluding management fees | 0.23% | 0.19% | 0.24% | [1],[2] |
Net income (loss) | 8.46% | 15.17% | 23.94% | [1] |
[1] | The commencement of operations of the United States Brent Oil Fund, LP was June 2, 2010.
[2] | Annualized

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