XML 39 R24.htm IDEA: XBRL DOCUMENT v3.4.0.3

CONTRACTS AND AGREEMENTS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Brokerage commissions	$ 53,272	$ 25,577
Percentage Of Average Daily Net Assets	0.22%	0.13%
Rebalancing Investments Transaction [Member]
Brokerage commissions	$ 51,031	$ 22,561
Percentage Of Average Daily Net Assets	95.79%	88.21%
Creation And Redemption Activity [Member]
Brokerage commissions	$ 2,241	$ 3,016
Percentage Of Average Daily Net Assets	4.21%	11.79%

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: