XML 33 R1.htm IDEA: XBRL DOCUMENT v3.3.0.814
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2015
Nov. 10, 2015
Document Information [Line Items]    
Entity Registrant Name United States Brent Oil Fund, LP  
Entity Central Index Key 0001472494  
Current Fiscal Year End Date --09-30  
Entity Filer Category Non-accelerated Filer  
Trading Symbol BNO  
Entity Common Stock, Shares Outstanding   5,100,000
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3