v2.4.0.6
Loans and Allowance for Credit Losses, Troubled Debt Restructurings, Current Defaults (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults $ 1,992 $ 2,134
Commercial and Industrial Loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 379 216
Commercial Real Estate Mortgage [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 579 331
Commercial Real Estate Construction [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 261 69
Lease Financing [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 1 1
Foreign Loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 0 1
Total Commercial [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 1,220 618
Real estate 1-4 family first mortgage [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 567 1,110
Real estate 1-4 family junior lien mortgage [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 55 137
Credit Card [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 94 156
Other revolving credit and installment [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 56 113
Total Consumer [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults $ 772 $ 1,516