v2.4.0.6
Loans and Allowance for Credit Losses, Troubled Debt Restructurings, Current Defaults (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults $ 717 $ 517
Commercial and Industrial Loans [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 110 26
Commercial Real Estate Mortgage [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 252 49
Commercial Real Estate Construction [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 155 19
Total Commercial [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 517 94
Real estate 1-4 family first mortgage [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 147 302
Real estate 1-4 family junior lien mortgage [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 20 34
Credit Card [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 27 61
Other revolving credit and installment [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults 6 26
Total Consumer [Member]
   
Financing Receivable, Modifications [Line Items]    
Recorded investment of defaults $ 200 $ 423