v2.4.0.8
Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Consumer (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Dec. 31, 2008
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]      
Purchased Credit Impaired Loans (carrying value) $ 28,799 $ 30,968 $ 58,797
Residential Mortgage [Member]
      
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]      
Purchased Credit Impaired Loans (carrying value) 25,542 26,991  
Residential Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
      
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]      
Current-29 DPD and still accruing 21,383 22,502  
30-59 DPD and still accruing 2,326 2,598  
60-89 DPD and still accruing 1,205 1,368  
90-119 DPD and still accruing 556 656  
120-179 DPD and still accruing 645 811  
180+ DPD and still accruing 5,058 5,472  
Total consumer PCI loans (adjusted unpaid principal balance) 31,173 33,407  
Purchased Credit Impaired Loans (carrying value) 25,542 26,991  
Real estate 1-4 family first mortgage [Member]
      
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]      
Purchased Credit Impaired Loans (carrying value) 25,408 26,839 39,214
Real estate 1-4 family first mortgage [Member] | Purchased Credit-Impaired Loans [Member]
      
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]      
Current-29 DPD and still accruing 21,201 22,304  
30-59 DPD and still accruing 2,317 2,587  
60-89 DPD and still accruing 1,201 1,361  
90-119 DPD and still accruing 553 650  
120-179 DPD and still accruing 640 804  
180+ DPD and still accruing 4,953 5,356  
Total consumer PCI loans (adjusted unpaid principal balance) 30,865 33,062  
Purchased Credit Impaired Loans (carrying value) 25,408 26,839  
Real estate 1-4 family junior lien mortgage [Member]
      
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]      
Purchased Credit Impaired Loans (carrying value) 134 152 728
Real estate 1-4 family junior lien mortgage [Member] | Purchased Credit-Impaired Loans [Member]
      
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]      
Current-29 DPD and still accruing 182 198  
30-59 DPD and still accruing 9 11  
60-89 DPD and still accruing 4 7  
90-119 DPD and still accruing 3 6  
120-179 DPD and still accruing 5 7  
180+ DPD and still accruing 105 116  
Total consumer PCI loans (adjusted unpaid principal balance) 308 345  
Purchased Credit Impaired Loans (carrying value) $ 134 $ 152