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, 2012
Mar. 31, 2011
Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Allowance for credit losses, beginning balance $ 19,668 $ 23,463  
Provision for credit losses 1,995 2,210  
Interest income on certain impaired loans (1) (87) (83)  
Loan charge-offs (2,880) (3,827)  
Loan recoveries 485 617  
Net loan charge-offs (2,395) (3,210)  
Allowances related to business combinations/other (52) 3  
Allowance for credit losses, ending balance 19,129 22,383  
Components: Allowance for loan losses 18,852 21,983 19,372
Components: Allowance for unfunded credit commitments 277 400  
Components: Allowance for credit losses 19,129 22,383  
Net loan charge-offs (annualized) as a percentage of average total loans 1.25% 1.73%  
Allowance for loan losses as a percentage of total loans 2.46% 2.93%  
Allowance for credit losses as a percentage of total loans 2.50% 2.98%  
Commercial and Industrial Loans [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (359) (468)  
Loan recoveries 103 114  
Commercial Real Estate Mortgage [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (82) (179)  
Loan recoveries 36 27  
Commercial Real Estate Construction [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (80) (119)  
Loan recoveries 13 36  
Lease Financing [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (8) (13)  
Loan recoveries 6 7  
Foreign Loans [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (29) (39)  
Loan recoveries 15 11  
Total Commercial [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Allowance for credit losses, beginning balance 6,358 8,169  
Provision for credit losses 188 472  
Interest income on certain impaired loans (1) (31) (45)  
Loan charge-offs (558) (818)  
Loan recoveries 173 195  
Net loan charge-offs (385) (623)  
Allowances related to business combinations/other 0 0  
Allowance for credit losses, ending balance 6,130 7,973  
Components: Allowance for credit losses 6,130 7,973  
Real estate 1-4 family first mortgage [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (828) (1,015)  
Loan recoveries 37 111  
Real estate 1-4 family junior lien mortgage [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (820) (1,046)  
Loan recoveries 57 52  
Credit Card [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (301) (448)  
Loan recoveries 59 66  
Other revolving credit and installment [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Loan charge-offs (373) (500)  
Loan recoveries 159 193  
Total Consumer [Member]
     
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Allowance for credit losses, beginning balance 13,310 15,294  
Provision for credit losses 1,807 1,738  
Interest income on certain impaired loans (1) (56) (38)  
Loan charge-offs (2,322) (3,009)  
Loan recoveries 312 422  
Net loan charge-offs (2,010) (2,587)  
Allowances related to business combinations/other (52) 3  
Allowance for credit losses, ending balance 12,999 14,410  
Components: Allowance for credit losses $ 12,999 $ 14,410