XML 36 R21.htm IDEA: XBRL DOCUMENT
v3.4.0.3

ORGANIZATION AND BUSINESS (Details Textual) | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 02, 2010 USD ($) $ / shares shares | Mar. 31, 2016 USD ($) Contracts $ / shares shares | Dec. 31, 2015 $ / shares | Mar. 31, 2015 $ / shares | Dec. 31, 2014 $ / shares | May. 31, 2010 shares
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 | $ / shares | $ 50.00 | $ 12.31 | $ 12.22 | $ 20.48 | $ 22.39 |
Initial stock units issued | 200,000 |  |  |  |  |
Initial Units Value, Issued | $ | $ 10,000,000 |  |  |  |  |
Total Units Registered Of Entity |  | 50,000,000 |  |  |  |
Number of Units Per Baskets |  | 50,000 |  |  |  |
ICE Brent Crude Oil Futures CO June 2016 contract expiring April 2016 [Member] |  |  |  |  |  |
Number of Contracts | Contracts |  | 2,732 |  |  |  |

X
- Definition Total number of initial units of an entity that have been issued so reported as of the period. + References No definition available. + Details
Name: | bno_InitialStockUnitsIssued
Namespace Prefix: | bno_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the initial value issued during the period. + References No definition available. + Details
Name: | bno_InitialUnitsValueIssued
Namespace Prefix: | bno_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Initially Registered Units of Entity With SEC based on during period. + References No definition available. + Details
Name: | bno_InitiallyRegisteredUnitsOfEntityWithSec
Namespace Prefix: | bno_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net asset value per unit. + References No definition available. + Details
Name: | bno_NetAssetValuePerUnit
Namespace Prefix: | bno_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Units Per Baskets. + References No definition available. + Details
Name: | bno_NumberOfUnitsPerBaskets
Namespace Prefix: | bno_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total units of the entity registered under the Securities and Exchange commission reported as of the period. + References No definition available. + Details
Name: | bno_TotalUnitsRegisteredOfEntity
Namespace Prefix: | bno_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition A description of what the Transaction fee during the period. + References No definition available. + Details
Name: | bno_TransactionFee
Namespace Prefix: | bno_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Units issuers during period to authorized purchasers of face-amount certificates and registered investment companies. + References No definition available. + Details
Name: | bno_UnitsIssuedDuringPeriodToAuthorizedPurchasersThroughDistributors
Namespace Prefix: | bno_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Balance held at close of period in number of contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C.Column B) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12.Column B) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14.Column B) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 + Details
Name: | us-gaap_InvestmentOwnedBalanceContracts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=bno_IceBrentCrudeOilFuturesCoJune2016ContractExpiringApril2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |