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v3.25.1

FINANCIAL HIGHLIGHTS (Details) - $ / shares | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Per Share Operating Performance: |  |
Net asset value, beginning of period | $ 30.14 | $ 27.39
Total income (loss) | 1.08 | 4.66
Total expenses | (0.09) | (0.09)
Net increase (decrease) in net asset value | 0.99 | 4.57
Net asset value, end of period | $ 31.13 | $ 31.96
Total Return | 3.28% | 16.68%
Ratios to Average Net Assets |  |
Total income (loss) | 5.22% | 15.49%
Management fees | 0.75% | 0.75%
Total expenses excluding management fees | 0.45% | 0.45%
Net income (loss) | 4.92% | 15.20%

X
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Balance Type: | na
Period Type: | instant

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- Definition Representing per share value net increase decrease in net asset. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Representing percentage value of management fees on net assets. + References No definition available. + Details
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Balance Type: | na
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- References No definition available. + Details
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- Definition Representing percentage value of total expenses excluding management fees on net assets. + References No definition available. + Details
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- Definition Representing percentage value of total income on net assets. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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

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

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