XML 31 R104.htm IDEA: XBRL DOCUMENT v2.4.1.9
Loans - Concentration of Credit Risk (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Receivables [Abstract]    
Interest only residential mortgage loans $ 3,531hsbcusa_InterestOnlyResidentialMortgageLoans $ 3,643hsbcusa_InterestOnlyResidentialMortgageLoans