v2.4.0.6
Loans and Allowance for Credit Losses, Impaired Loans (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Impaired Loans [Abstract]    
Unpaid principal balance $ 33,481 $ 39,332
Impaired loans, Recorded Investment 27,687 28,010
Impaired loans with related allowance for credit losses, Recorded Investment 26,838 26,890
Related allowance for credit losses 6,530 6,678
Commercial and Industrial Loans [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 4,224 7,191
Impaired loans, Recorded Investment 2,759 3,072
Impaired loans with related allowance for credit losses, Recorded Investment 2,665 3,018
Related allowance for credit losses 449 501
Commercial Real Estate Mortgage [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 6,404 7,490
Impaired loans, Recorded Investment 5,154 5,114
Impaired loans with related allowance for credit losses, Recorded Investment 4,984 4,637
Related allowance for credit losses 1,135 1,133
Commercial Real Estate Construction [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 2,875 4,733
Impaired loans, Recorded Investment 2,111 2,281
Impaired loans with related allowance for credit losses, Recorded Investment 2,073 2,281
Related allowance for credit losses 408 470
Lease Financing [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 90 127
Impaired loans, Recorded Investment 59 68
Impaired loans with related allowance for credit losses, Recorded Investment 59 68
Related allowance for credit losses 17 21
Foreign Loans [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 61 185
Impaired loans, Recorded Investment 30 31
Impaired loans with related allowance for credit losses, Recorded Investment 30 31
Related allowance for credit losses 5 8
Total Commercial [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 13,654 19,726
Impaired loans, Recorded Investment 10,113 10,566
Impaired loans with related allowance for credit losses, Recorded Investment 9,811 10,035
Related allowance for credit losses 2,014 2,133
Real estate 1-4 family first mortgage [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 16,703 16,494
Impaired loans, Recorded Investment 14,602 14,486
Impaired loans with related allowance for credit losses, Recorded Investment 14,107 13,909
Related allowance for credit losses 3,394 3,380
Real estate 1-4 family junior lien mortgage [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 2,243 2,232
Impaired loans, Recorded Investment 2,093 2,079
Impaired loans with related allowance for credit losses, Recorded Investment 2,093 2,079
Related allowance for credit losses 787 784
Credit Card [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 594 593
Impaired loans, Recorded Investment 594 593
Impaired loans with related allowance for credit losses, Recorded Investment 578 593
Related allowance for credit losses 297 339
Other revolving credit and installment [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 287 287
Impaired loans, Recorded Investment 285 286
Impaired loans with related allowance for credit losses, Recorded Investment 249 274
Related allowance for credit losses 38 42
Total Consumer [Member]
    
Impaired Loans [Abstract]    
Unpaid principal balance 19,827 19,606
Impaired loans, Recorded Investment 17,574 17,444
Impaired loans with related allowance for credit losses, Recorded Investment 17,027 16,855
Related allowance for credit losses $ 4,516 $ 4,545