v2.4.0.6
Loans and Allowance for Credit Losses, Loans by Delinquency Status, Commercial (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Financing Receivable, Recorded Investment, Aging [Abstract]          
90+ DPD and still accruing $ 23,245 $ 22,569      
Nonaccrual loans 20,486 21,304      
Purchased Credit Impaired Loans 30,968 36,719 41,430 51,705 58,797
Loans 799,574 769,631 757,267 782,770 864,830
Commercial and Industrial Loans [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Nonaccrual loans 1,422 2,142      
Purchased Credit Impaired Loans 259 399 718 1,911 4,580
Loans 187,759 167,216 151,284 158,352 202,469
Commercial Real Estate Mortgage [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Nonaccrual loans 3,322 4,085      
Purchased Credit Impaired Loans 1,970 3,270 2,855 4,137 5,803
Loans 106,340 105,975 99,435 97,527 94,923
Commercial Real Estate Construction [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Nonaccrual loans 1,003 1,890      
Purchased Credit Impaired Loans 877 1,745 2,949 5,207 6,462
Loans 16,904 19,382 25,333 36,978 42,861
Lease Financing [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Nonaccrual loans 27 53      
Purchased Credit Impaired Loans 0 0      
Loans 12,424 13,117 13,094 14,210 15,829
Foreign Loans [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Nonaccrual loans 50 47      
Purchased Credit Impaired Loans 871 1,353 1,413 1,733 1,859
Loans 37,771 39,760 32,912 29,398 33,882
Total Commercial [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Nonaccrual loans 5,824 8,217      
Purchased Credit Impaired Loans 3,977 6,767 7,935 12,988 18,704
Loans 361,198 345,450 322,058 336,465 389,964
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Current-29 DPD and still accruing 185,614 163,583      
30-89 DPD and still accruing 417 939      
90+ DPD and still accruing 47 153      
Nonaccrual loans 1,422 2,142      
Loans, excluding Purchased Credit Impaired Loans 187,500 166,817      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Current-29 DPD and still accruing 100,317 97,410      
30-89 DPD and still accruing 503 954      
90+ DPD and still accruing 228 256      
Nonaccrual loans 3,322 4,085      
Loans, excluding Purchased Credit Impaired Loans 104,370 102,705      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Current-29 DPD and still accruing 14,861 15,471      
30-89 DPD and still accruing 136 187      
90+ DPD and still accruing 27 89      
Nonaccrual loans 1,003 1,890      
Loans, excluding Purchased Credit Impaired Loans 16,027 17,637      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Current-29 DPD and still accruing 12,344 12,934      
30-89 DPD and still accruing 53 130      
90+ DPD and still accruing 0 0      
Nonaccrual loans 27 53      
Loans, excluding Purchased Credit Impaired Loans 12,424 13,117      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Current-29 DPD and still accruing 36,837 38,122      
30-89 DPD and still accruing 12 232      
90+ DPD and still accruing 1 6      
Nonaccrual loans 50 47      
Loans, excluding Purchased Credit Impaired Loans 36,900 38,407      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
          
Financing Receivable, Recorded Investment, Aging [Abstract]          
Current-29 DPD and still accruing 349,973 327,520      
30-89 DPD and still accruing 1,121 2,442      
90+ DPD and still accruing 303 504      
Nonaccrual loans 5,824 8,217      
Loans, excluding Purchased Credit Impaired Loans $ 357,221 $ 338,683