XML 21 R78.htm IDEA: XBRL DOCUMENT v2.4.0.6
Loans - Loans Classified as TDR Loans (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Financing Receivable, Modifications [Line Items]        
TDR loans during previous months which became contractually delinquent $ 57 $ 5 $ 159 $ 60
Commercial Loans [Member]
       
Financing Receivable, Modifications [Line Items]        
TDR loans during previous months which became contractually delinquent         48
Commercial Loans [Member] | Construction and Other Real Estate [Member]
       
Financing Receivable, Modifications [Line Items]        
TDR loans during previous months which became contractually delinquent          48
Commercial Loans [Member] | Business Banking and Middle Markets Enterprises [Member]
       
Financing Receivable, Modifications [Line Items]        
TDR loans during previous months which became contractually delinquent            
Consumer Loans [Member]
       
Financing Receivable, Modifications [Line Items]        
TDR loans during previous months which became contractually delinquent 57 5 159 12
Consumer Loans [Member] | Residential Mortgage [Member]
       
Financing Receivable, Modifications [Line Items]        
TDR loans during previous months which became contractually delinquent 57 4 159 9
Consumer Loans [Member] | Credit Card Receivables [Member]
       
Financing Receivable, Modifications [Line Items]        
TDR loans during previous months which became contractually delinquent   $ 1   $ 3