XML 42 R27.htm IDEA: XBRL DOCUMENT v3.25.3

CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
CONTRACTS AND AGREEMENTS
Total commissions accrued to brokers	$ 23,132	$ 37,074	$ 63,531	$ 82,066
Commission
CONTRACTS AND AGREEMENTS
Total commissions accrued to brokers			$ 63,531	$ 82,066
Total commissions as annualized percentage of average total net assets	0.09%	0.09%	0.09%	0.09%

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

- Definition

Percentage of commission accrued.

+ References

No definition available.

+ Details

Name:	bno_PercentageOfCommissionAccrued
Namespace Prefix:	bno_
Data Type:	dtr-types: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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 940
-SubTopic 320
-Name Accounting Standards Codification
-Section 45
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479035/940-320-45-6

+ 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_CommissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: