v2.4.0.6
Loans and Allowance for Credit Losses, Allowance for Credit Losses (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Allowance for credit losses, beginning balance $ 17,477 $ 19,668  
Provision for credit losses 1,219 1,995  
Interest income on certain impaired loans (73) (87)  
Loan charge-offs (1,861) (2,880)  
Loan recoveries 442 485  
Net loan charge-offs (1,419) (2,395)  
Allowances related to business combinations/other (11) (52)  
Allowance for credit losses, ending balance 17,193 19,129  
Components: Allowance for loan losses 16,711 18,852 17,060
Components: Allowance for unfunded credit commitments 482 277  
Components: Allowance for credit losses 17,193 19,129  
Net loan charge-offs (annualized) as a percentage of average total loans 0.72% 1.25%  
Allowance for loan losses as a percentage of total loans 2.09% 2.46%  
Allowance for credit losses as a percentage of total loans 2.15% 2.50%  
Total Commercial [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Allowance for credit losses, beginning balance 5,714 6,358  
Provision for credit losses 192 188  
Interest income on certain impaired loans (19) (31)  
Loan charge-offs (260) (558)  
Loan recoveries 170 173  
Net loan charge-offs (90) (385)  
Allowances related to business combinations/other (11) 0  
Allowance for credit losses, ending balance 5,786 6,130  
Components: Allowance for credit losses 5,786 6,130  
Commercial and Industrial Loans [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (181) (359)  
Loan recoveries 88 103  
Commercial Real Estate Mortgage [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (60) (82)  
Loan recoveries 31 36  
Commercial Real Estate Construction [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (5) (80)  
Loan recoveries 39 13  
Lease Financing [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (3) (8)  
Loan recoveries 4 6  
Foreign Loans [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (11) (29)  
Loan recoveries 8 15  
Total Consumer [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Allowance for credit losses, beginning balance 11,763 13,310  
Provision for credit losses 1,027 1,807  
Interest income on certain impaired loans (54) (56)  
Loan charge-offs (1,601) (2,322)  
Loan recoveries 272 312  
Net loan charge-offs (1,329) (2,010)  
Allowances related to business combinations/other 0 (52)  
Allowance for credit losses, ending balance 11,407 12,999  
Components: Allowance for credit losses 11,407 12,999  
Real estate 1-4 family first mortgage [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (475) (828)  
Loan recoveries 46 37  
Real estate 1-4 family junior lien mortgage [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (514) (820)  
Loan recoveries 65 57  
Credit Card [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (266) (301)  
Loan recoveries 31 59  
Automobile [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (164) (179)  
Loan recoveries 88 105  
Other revolving credit and installment [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (182) (194)  
Loan recoveries $ 42 $ 54