XML 18 R3.htm IDEA: XBRL DOCUMENT v3.7.0.1

Condensed Schedule of Investments	Mar. 31, 2017 USD ($) Contracts
Cash Equivalents [Member] | US Treasury Securities [Member]
Market Value	$ 68,889,751
% of Partners' Capital	66.92%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.46%, 4/06/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,999,810
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.47%, 4/13/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,999,530
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.46%, 4/20/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,999,280
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.47%, 4/27/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,998,992
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.49%, 5/04/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,998,646
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.55%, 5/11/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,998,789
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.60%, 5/18/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,997,670
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.61%, 5/25/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,997,266
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.60%, 6/01/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,996,975
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.62%, 6/08/2017
Principal Amount	$ 4,000,000
Market Value	$ 3,995,353
% of Partners' Capital	3.88%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.65%, 6/15/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,995,969
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.64%, 6/22/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,995,627
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.60%, 6/29/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,995,550
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.62%, 7/06/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,995,080
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.59%, 7/13/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,994,979
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.61%, 7/20/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,996,303
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.60%, 7/27/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,994,199
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.63%, 8/03/2017
Principal Amount	$ 3,000,000
Market Value	$ 2,993,542
% of Partners' Capital	2.91%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.61%, 8/10/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,995,560
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.65%, 8/17/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,995,017
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.67%, 8/24/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,994,603
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.76%, 8/31/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,993,624
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.84%, 9/07/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,992,580
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.86%, 9/14/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,992,069
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.87%, 9/21/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,991,638
% of Partners' Capital	1.94%
Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills,0.89%, 9/28/2017
Principal Amount	$ 2,000,000
Market Value	$ 1,991,100
% of Partners' Capital	1.93%
Cash Equivalents [Member] | United States [Member]
Market Value	$ 95,889,751
% of Partners' Capital	93.15%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]
Market Value	$ 27,000,000
% of Partners' Capital	26.23%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member]
Principal Amount	$ 14,000,000
Market Value	$ 14,000,000
% of Partners' Capital	13.60%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
Principal Amount	$ 7,000,000
Market Value	$ 7,000,000
% of Partners' Capital	6.80%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds Government Portfolio [Member]
Principal Amount	$ 6,000,000
Market Value	$ 6,000,000
% of Partners' Capital	5.83%
Open Futures Contracts - Long [Member] | United States [Member] | Ice Brent Crude Oil Futures Co June 2017 Contracts Expiring April 2017 [Member]
Number of Contracts | Contracts	1,923	[1]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 3,999,260	[1]
% of Partners' Capital	3.88%	[1]
[1] Collateral amounted to $7,993,396 on open futures contracts.

X

- Definition

Percentage of Partners Capital.

+ References

No definition available.

+ Details

Name:	bno_PercentageOfPartnersCapital
Namespace Prefix:	bno_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Unrealized gain (loss) on open commodity futures and cleared swap contracts.

+ References

No definition available.

+ Details

Name:	bno_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts
Namespace Prefix:	bno_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Definition

For investments which are quantified by principal amount, the principle balance held at close of period.

+ References

Reference 1: 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

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 4
-Subparagraph (SX 210.12-12C.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

+ Details

Name:	us-gaap_InvestmentOwnedBalancePrincipalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Nominal or face amount on the investment owned.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Underlying
-URI http://asc.fasb.org/extlink&oid=6527499

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 10
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6431724&loc=d3e32938-113948

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 20
-Section 10
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6438156&loc=d3e57880-113973

+ Details

Name:	us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	invest_InvestmentAxis=us-gaap_CashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesClassAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsElevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwelveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsThirteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsNineteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwentyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwentyFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_UsTreasuryBillsTwentySixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentGeographicRegionAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesClassAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_FidelityInvestmentsMoneyMarketFundsGovernmentPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_GoldmanSachsFinancialSquareFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=bno_OpenFuturesContractsLongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=bno_IceBrentCrudeOilFuturesCoJune2017ContractsExpiringApril2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: