XML 95 R1.htm IDEA: XBRL DOCUMENT v3.2.0.727
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2015
Jul. 31, 2015
Document and Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q2  
Trading Symbol HSBCUSA  
Entity Registrant Name HSBC USA INC /MD/  
Entity Central Index Key 0000083246  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   714