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Condensed Statement of Changes in Partners' Capital (USD $) | Total | General Partner [Member] | Limited Partner [Member]
--- | --- | --- | ---
Balances at Dec. 31, 2012 |  | $ 45,072,621 | $ 0 | $ 45,072,621
Net asset value, beginning of period at Dec. 31, 2012 | [1],[2],[3] | $ 40.98 |  |
Addition of 1,400,000 partnership units |  | 58,653,136 | 0 | 58,653,136
Redemption of 1,650,000 partnership units |  | (68,828,574) | 0 | (68,828,574)
Net gain |  | 1,131,849 | 0 | 1,131,849
Balances at Sep. 30, 2013 |  | $ 36,029,032 | $ 0 | $ 36,029,032
Net asset value, end of period at Sep. 30, 2013 |  | $ 42.39 |  |
[1] | On August 26, 2013, USBO executed a 2-for-1 forward unit split for all unitholders of record as of the close of markets on August 26, 2013. The 2-for-1 forward unit split was payable after the close of markets on August 28, 2013. USBO began trading at its post split price on August 29, 2013. The Financial Highlights (Unaudited) have been adjusted for the periods shown to reflect the 2-for-1 forward unit split on a retroactive basis.
[2] | On August 26, 2013, the United States Brent Oil Fund, LP executed a 2-for-1 forward unit split for all unitholders of record as of the close of markets on August 26, 2013. The 2-for-1 forward unit split was payable after the close of markets on August 28, 2013. United States Brent Oil Fund, LP began trading its post-unit split price on August 29, 2013. Historical units outstanding, net asset value per unit and market value per unit have been adjusted to reflect the 2-for-1 forward unit split on a retroactive basis.
[3] | On August 26, 2013, the United States Brent Oil Fund, LP executed a 2-for-1 forward unit split for all unitholders of record as of the close of markets on August 26, 2013. The 2-for-1 forward unit split was payable after the close of markets on August 28, 2013. United States Brent Oil Fund, LP began trading at its post split price on August 29, 2013. The Condensed Statement of Changes in Partners’ Capital (Unaudited) has been adjusted for the period to reflect the 2-for-1 forward unit split on a retroactive basis.

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- Definition The amount of ownership interest of different classes of partners in limited partnership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
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- Definition Total contributions made by each class of partners (i.e., general, limited and preferred partners). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
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- Definition Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
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