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ORGANIZATION AND BUSINESS (Details Textual) (USD $) | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 02, 2010 | Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | May 31, 2010
Units Issued During Period To Authorized Purchasers Through Distributors |  | 50,000 |  |  |  |  |  |
Transaction Fee |  | $ 350 |  |  |  |  |  |
Initially Registered Units Of Entity With Sec |  |  |  |  |  |  |  | 50,000,000
Net asset value per unit | $ 50.00 | $ 43.06 | $ 43.81 | $ 41.63 | [1] | $ 40.98 | [1] |
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] |  |  |  |  |  |  |  |
Initial stock units issued |  | 900,000 |  |  |  |  |  |
Initial Stock Units Outstanding |  | 900,000 |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Net asset value per unit |  | $ 44.96 |  |  |  |  |  |
Open Futures Contracts - Long [Member] | United States [Member] | ICE Brent Crude Oil Futures CO May 2014 contracts, expiring April 2014 [Member] |  |  |  |  |  |  |  |
Number of Contracts |  | 240 |  |  |  |  |  |
[1] | 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 (Unaudited) have been adjusted for the periods shown to reflect the 2-for-1 forward share split on a retroactive basis.

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