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CONTRACTS AND AGREEMENTS - Additional Information (Details) - USD ($) |  | 3 Months Ended
--- | --- | ---
Oct. 01, 2022 | Mar. 31, 2024
Maximum |  |
Contracts And Agreement [Line Items] |  |
Commission per round turn |  | $ 8
Minimum |  |
Contracts And Agreement [Line Items] |  |
Commission per round turn |  | $ 7
Marketing Agreement |  |
Contracts And Agreement [Line Items] |  |
Fee percentage | 0.025% |
Marketing Agreement | BNO's assets up to $3 billion |  |
Contracts And Agreement [Line Items] |  |
Fee percentage |  | 0.06%
Marketing Agreement | BNO's assets up to $3 billion | Minimum |  |
Contracts And Agreement [Line Items] |  |
Base amount for determining fee percentage |  | $ 3,000,000,000
Marketing Agreement | BNO's assets in excess of $3 billion |  |
Contracts And Agreement [Line Items] |  |
Fee percentage |  | 0.04%
Marketing Agreement | BNO's assets in excess of $3 billion | Maximum |  |
Contracts And Agreement [Line Items] |  |
Fee percentage |  | (10.00%)
Base amount for determining fee percentage |  | $ 3,000,000,000

X
- Definition Percentage of base fee. + References No definition available. + Details
Name: | bno_BaseFeePercentage
Namespace Prefix: | bno_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of base fee. + References No definition available. + Details
Name: | bno_BasisAmountForFeePercentage
Namespace Prefix: | bno_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the commissions round turn trade including exchange fees. + References No definition available. + Details
Name: | bno_CommissionPerRoundTurn
Namespace Prefix: | bno_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | bno_ContractsAndAgreementLineItems
Namespace Prefix: | bno_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=bno_MarketingAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bno_GroupFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bno_GroupFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |