XML 29 R24.htm IDEA: XBRL DOCUMENT
v2.4.1.9

CONTRACTS AND AGREEMENTS (Details) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Brokerage commissions | $ 25,577 us-gaap_FloorBrokerageExchangeAndClearanceFees | $ 4,109 us-gaap_FloorBrokerageExchangeAndClearanceFees
Percentage Of Average Daily Net Assets | 0.13%bno_PercentageOfAverageDailyNetAssets | 0.06%bno_PercentageOfAverageDailyNetAssets
Rebalancing Investments Transaction [Member] |  |
Brokerage commissions | 22,561 us-gaap_FloorBrokerageExchangeAndClearanceFees / us-gaap_StatementClassOfStockAxis = bno_RebalancingInvestmentsTransactionMember | 3,702 us-gaap_FloorBrokerageExchangeAndClearanceFees / us-gaap_StatementClassOfStockAxis = bno_RebalancingInvestmentsTransactionMember
Percentage Of Average Daily Net Assets | 88.21%bno_PercentageOfAverageDailyNetAssets / us-gaap_StatementClassOfStockAxis = bno_RebalancingInvestmentsTransactionMember | 90.09%bno_PercentageOfAverageDailyNetAssets / us-gaap_StatementClassOfStockAxis = bno_RebalancingInvestmentsTransactionMember
Creation And Redemption Activity [Member] |  |
Brokerage commissions | $ 3,016 us-gaap_FloorBrokerageExchangeAndClearanceFees / us-gaap_StatementClassOfStockAxis = bno_TradesNecessitatedByCreationAndRedemptionActivityMember | $ 407 us-gaap_FloorBrokerageExchangeAndClearanceFees / us-gaap_StatementClassOfStockAxis = bno_TradesNecessitatedByCreationAndRedemptionActivityMember
Percentage Of Average Daily Net Assets | 11.79%bno_PercentageOfAverageDailyNetAssets / us-gaap_StatementClassOfStockAxis = bno_TradesNecessitatedByCreationAndRedemptionActivityMember | 9.91%bno_PercentageOfAverageDailyNetAssets / us-gaap_StatementClassOfStockAxis = bno_TradesNecessitatedByCreationAndRedemptionActivityMember

X
- Definition Percentage Of Average Daily Net Assets + References No definition available. + Details
Name: | bno_PercentageOfAverageDailyNetAssets
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, stock exchange fees, order flow fees, and clearance fees. + References No definition available. + Details
Name: | us-gaap_FloorBrokerageExchangeAndClearanceFees
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=bno_RebalancingInvestmentsTransactionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=bno_TradesNecessitatedByCreationAndRedemptionActivityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |