XML 35 R21.htm IDEA: XBRL DOCUMENT
v3.22.1

FINANCIAL HIGHLIGHTS (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2022
FINANCIAL HIGHLIGHTS |
Schedule of per share performance data and other supplemental financial data | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months | ​ | Three months | ​
​ | ​ | ended | ​ | ended | ​
​ |  | March 31, 2022 |  | March 31, 2021 | ​
​ | ​ | (Unaudited) | ​ | (Unaudited) | ​
Per Share Operating Performance: | ​ | ​ | ​ | ​ | ​ | ​ |
Net asset value, beginning of period | ​ | $ | 20.87 | ​ | $ | 12.91 | ​
Total income (loss) | ​ |  | 9.04 | ​ |  | 2.96 | ​
Total expenses | ​ |  | (0.07) | ​ |  | (0.03) | ​
Net increase (decrease) in net asset value | ​ |  | 8.97 | ​ |  | 2.93 | ​
Net asset value, end of period | ​ | $ | 29.84 | ​ | $ | 15.84 | ​
​ | ​ | ​ | ​ | ​ |  | ​ | ​
Total Return | ​ | ​ | 42.98 | % |  | 22.70 | %
​ | ​ | ​ | ​ | ​ |  | ​ | ​
Ratios to Average Net Assets | ​ | ​ | ​ | ​ |  | ​ | ​
Total income (loss) | ​ | ​ | 33.60 | % |  | 21.56 | %
Management fees# | ​ | ​ | 0.75 | % |  | 0.75 | %
Total expenses excluding management fees# | ​ | ​ | 0.31 | % |  | 0.31 | %
Expense waived# | ​ | ​ | — | % |  | (0.16) | %
Net expense excluding management fees# | ​ | ​ | 0.31 | % |  | 0.15 | %
Net income (loss) | ​ | ​ | 33.34 | % |  | 21.34 | %

X
- Definition Schedule of per unit performance data and other financial data Table Text Block. + References No definition available. + Details
Name: | bno_ScheduleOfPerUnitPerformanceDataAndOtherFinancialDataTableTextBlock
Namespace Prefix: | bno_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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