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Organization And Business (Details Textual) (USD $) | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 29, 2012 | Jun. 02, 2010 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | May 31, 2010
Units Issued During Period To Authorized Purchasers Through Distributors | 50,000 |  |  |  |  |  |  |  |  |  |  |
Units Issued During Period To Authorized Purchasers Through Marketing Agent | 100,000 |  |  |  |  |  |  |  |  |  |  |
Transaction Fee |  |  |  | $ 350 |  |  |  |  |  |  |  |
Initially Registered Units Of Entity With Sec |  |  |  |  |  |  |  |  |  |  |  | 50,000,000
Net asset value per share |  | $ 50.00 | [1] | $ 43.81 |  | $ 40.98 | [1],[2] | $ 37.27 | [1],[2] | $ 31.54 | [1],[2] |
Initial stock units issued |  | 200,000 |  | 450,000 |  |  |  |  |  |  |  |
Initial Stock Units Outstanding |  |  |  | 450,000 |  |  |  |  |  |  |  |
Initial Units Value, Issued |  | 10,000,000 |  |  |  |  |  |  |  |  |  |
Total Units Registered Of Entity |  |  |  | 50,000,000 |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net asset value per share |  |  |  | $ 89.92 |  |  |  |  |  |  |  |
Initial stock units issued |  |  |  | 900,000 |  |  |  |  |  |  |  |
Initial Stock Units Outstanding |  |  |  | 900,000 |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net asset value per share |  |  |  | $ 44.96 |  |  |  |  |  |  |  |
Prior to July 1, 2011 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Transaction Fee |  |  |  | $ 1,000 |  |  |  |  |  |  |  |
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO February 2014 contracts, expiring January 2014 and February 2013 contracts, expiring January 2013 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Number of Contracts |  |  |  | 237 | [3] | 406 | [4] |  |  |  |  |
[1] | On August 26, 2013, the United States Brent Oil Fund, LP executed a 2-for-1 forward share split for all shareholders of record as of the close of markets on August 26, 2013. The 2-for-1 forward share split was payable after the close of markets on August 28, 2013. United States Brent Oil Fund, LP began trading its post-share split price on August 29, 2013. The Statements of Financial Condition have been adjusted for the period shown to reflect the 2-for-1 forward share split on a retroactive basis.
[2] | On August 26, 2013, BNO executed a 2-for-1 forward share split for all shareholders of record as of the close of markets on August 26, 2013. The 2-for-1 forward share split was payable after the close of markets on August 28, 2013. BNO began trading at its post split price on August 29, 2013. The Financial Highlights have been adjusted for the periods shown to reflect the 2-for-1 forward share split on a retroactive basis.
[3] | Collateral amounted to $3,271,010 on open futures contracts.
[4] | Collateral amounted to $4,934,188 on open futures contracts.

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