XML 42 R27.htm IDEA: XBRL DOCUMENT
v3.8.0.1

FINANCIAL HIGHLIGHTS (Details) - $ / shares | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Per Share Operating Performance: |  |  |
Net asset value, beginning of period |  | $ 15.7 | $ 12.22
Total income (loss) |  | (0.41) | 2.46
Net expenses |  | (0.1) | (0.09)
Net increase (decrease) in net asset value |  | (0.51) | 2.37
Net asset value, end of period |  | $ 15.19 | $ 14.59
Total Return |  | (3.25%) | 19.39%
Ratios to Average Net Assets |  |  |
Total income (loss) |  | (1.30%) | 25.74%
Management fees | [1] | 0.75% | 0.75%
Total expenses excluding management fees | [1] | 0.48% | 0.32%
Expenses waived | [1] | (0.33%) | (0.17%)
Net expenses excluding management fees | [1] | 0.15% | 0.15%
Net income (loss) |  | (1.97%) | 25.06%
[1] | Annualized.

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 Representing per share value net increase decrease in net asset. + References No definition available. + Details
Name: | bno_NetIncreaseDecreaseInNetAssetValue
Namespace Prefix: | bno_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition expenses write off + References No definition available. + Details
Name: | bno_OperatingPerformancePerUnitAbstract
Namespace Prefix: | bno_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing percentage value of total expenses waived on net assets. + References No definition available. + Details
Name: | bno_PercentageOfExpensesWaivedOnNetAssets
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing percentage value of management fees on net assets. + References No definition available. + Details
Name: | bno_PercentageOfManagementFeesOnNetAssets
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing percentage value of net expenses excluding management fees on net assets. + References No definition available. + Details
Name: | bno_PercentageOfNetExpensesExcludingManagementFeeOnNetAssets
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing percentage value of net income on net assets. + References No definition available. + Details
Name: | bno_PercentageOfNetIncomeOnNetAssets
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | bno_PercentageOfRatiosToAverageNetAssetsAbstract
Namespace Prefix: | bno_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing percentage value of total expenses excluding management fees on net assets. + References No definition available. + Details
Name: | bno_PercentageOfTotalExpensesExcludingManagementFeesOnNetAssets
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing percentage value of total income on net assets. + References No definition available. + Details
Name: | bno_PercentageOfTotalIncomeOnNetAssets
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing percentage of total return. + References No definition available. + Details
Name: | bno_PercentageOfTotalReturn
Namespace Prefix: | bno_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing per share value of total expense. + References No definition available. + Details
Name: | bno_TotalExpensePerUnit
Namespace Prefix: | bno_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representing per share value of total income. + References No definition available. + Details
Name: | bno_TotalIncomePerUnit
Namespace Prefix: | bno_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration