v2.4.0.6
Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Commercial (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
90+ DPD and accruing $ 22,555 $ 22,569
Purchased Credit Impaired Loans 35,534 36,719
Purchased Credit-Impaired Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
90+ DPD and accruing 7,100 8,700
Commercial and Industrial Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
90+ DPD and accruing 104 153
Purchased Credit Impaired Loans 385 399
Commercial and Industrial Loans [Member] | Purchased Credit-Impaired Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
Current-29 DPD and still accruing 334 359
30-89 DPD and still accruing 24 22
90+ DPD and accruing 27 18
Purchased Credit Impaired Loans 385 399
Commercial Real Estate Mortgage [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
90+ DPD and accruing 289 256
Purchased Credit Impaired Loans 3,107 3,270
Commercial Real Estate Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
Current-29 DPD and still accruing 2,683 2,867
30-89 DPD and still accruing 141 178
90+ DPD and accruing 283 225
Purchased Credit Impaired Loans 3,107 3,270
Commercial Real Estate Construction [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
90+ DPD and accruing 25 89
Purchased Credit Impaired Loans 1,564 1,745
Commercial Real Estate Construction [Member] | Purchased Credit-Impaired Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
Current-29 DPD and still accruing 1,027 1,206
30-89 DPD and still accruing 78 72
90+ DPD and accruing 459 467
Purchased Credit Impaired Loans 1,564 1,745
Foreign Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
90+ DPD and accruing 7 6
Purchased Credit Impaired Loans 1,198 1,353
Foreign Loans [Member] | Purchased Credit-Impaired Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
Current-29 DPD and still accruing 1,067 1,178
30-89 DPD and still accruing 0 0
90+ DPD and accruing 131 175
Purchased Credit Impaired Loans 1,198 1,353
Total Commercial [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
90+ DPD and accruing 425 504
Purchased Credit Impaired Loans 6,254 6,767
Total Commercial [Member] | Purchased Credit-Impaired Loans [Member]
    
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]    
Current-29 DPD and still accruing 5,111 5,610
30-89 DPD and still accruing 243 272
90+ DPD and accruing 900 885
Purchased Credit Impaired Loans $ 6,254 $ 6,767