XML 42 R27.htm IDEA: XBRL DOCUMENT
v3.21.2

CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Brokerage commissions | $ 71,693 | $ 205,173 | $ 166,778 | $ 251,852
Percentage Of Average Daily Net Assets | 0.10% | 0.25% | 0.10% | 0.25%
Rebalancing Investments Transaction [Member] |  |  |  |
Brokerage commissions |  |  | $ 157,413 | $ 217,371
Percentage Of Average Daily Net Assets | 94.38% | 86.31% | 94.38% | 86.31%
Creation And Redemption Activity [Member] |  |  |  |
Brokerage commissions |  |  | $ 9,365 | $ 34,481
Percentage Of Average Daily Net Assets | 5.62% | 13.69% | 5.62% | 13.69%

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: |