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Document And Entity Information	9 Months Ended
	Sep. 30, 2012
Entity Registrant Name	United States Brent Oil Fund, LP
Entity Central Index Key	0001472494
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Trading Symbol	bno
Entity Common Stock, Shares Outstanding	0
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2012
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2012

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