XML 50 R62.htm IDEA: XBRL DOCUMENT v2.4.0.8
Loans - Trouble Debt Restructuring Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment $ 1,275 $ 1,274
Trouble debt restructuring interest income recognized 15 11
Commercial Loan [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment 326 411
Trouble debt restructuring interest income recognized 6 3
Commercial Loan [Member] | Construction and Other Real Estate [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment 264 320
Trouble debt restructuring interest income recognized 6 2
Commercial Loan [Member] | Business and Corporate Banking [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment 19 60
Commercial Loan [Member] | Global Banking [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment 25 0
Commercial Loan [Member] | Other Commercial [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment 18 31
Trouble debt restructuring interest income recognized 0 1
Consumer Loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment 949 863
Trouble debt restructuring interest income recognized 9 8
Consumer Loans [Member] | Residential Mortgage [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment 941 849
Trouble debt restructuring interest income recognized 9 8
Consumer Loans [Member] | Credit Cards [Member]
   
Financing Receivable, Modifications [Line Items]    
Trouble debt restructuring average recorded investment $ 8 $ 14