v2.4.0.6
Loans and Allowance for Credit Losses, Loans by FICO Score, Consumer (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Purchased Credit Impaired Loans (carrying value) $ 30,968 $ 36,719 $ 41,430 $ 51,705 $ 58,797
Loans 799,574 769,631 757,267 782,770 864,830
Real estate 1-4 family first mortgage [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Purchased Credit Impaired Loans (carrying value) 26,839 29,746 33,245 38,386 39,214
Loans 249,900 228,894 230,235 229,536 247,894
Real estate 1-4 family junior lien mortgage [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Purchased Credit Impaired Loans (carrying value) 152 206 250 331 728
Loans 75,465 85,991 96,149 103,708 110,164
Credit Card [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Purchased Credit Impaired Loans (carrying value) 0 0      
Loans 24,640 22,836 22,260 24,003 23,555
Other revolving credit and installment [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Purchased Credit Impaired Loans (carrying value) 0 0 0 0 151
Loans 88,371 86,460 86,565 89,058 93,253
Total Consumer [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Purchased Credit Impaired Loans (carrying value) 26,991 29,952 33,495 38,717 40,093
Loans 438,376 424,181 435,209 446,305 474,866
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Less than 600 17,662 21,604      
600-639 10,208 10,978      
640-679 15,764 15,563      
680-719 24,725 23,622      
720-759 31,502 27,417      
760-799 63,946 47,337      
Greater than 800 26,044 21,381      
No FICO available 3,491 4,691      
FICO not required 0 0      
Government insured/guaranteed loans 29,719 26,555      
Loans, excluding Purchased Credit Impaired Loans 223,061 199,148      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Less than 600 6,122 7,428      
600-639 3,660 4,086      
640-679 6,574 7,187      
680-719 11,361 12,497      
720-759 15,992 17,574      
760-799 21,874 24,979      
Greater than 800 8,526 10,247      
No FICO available 1,204 1,787      
FICO not required 0 0      
Government insured/guaranteed loans 0 0      
Loans, excluding Purchased Credit Impaired Loans 75,313 85,785      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Less than 600 2,314 2,323      
600-639 1,961 1,787      
640-679 3,772 3,383      
680-719 4,990 4,697      
720-759 5,114 4,760      
760-799 4,109 3,517      
Greater than 800 2,223 1,969      
No FICO available 157 400      
FICO not required 0 0      
Government insured/guaranteed loans 0 0      
Loans, excluding Purchased Credit Impaired Loans 24,640 22,836      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Less than 600 9,091 8,921      
600-639 6,403 6,222      
640-679 10,153 9,350      
680-719 11,640 10,465      
720-759 10,729 9,936      
760-799 12,371 11,163      
Greater than 800 6,355 5,674      
No FICO available 3,780 4,393      
FICO not required 5,403 4,990      
Government insured/guaranteed loans 12,446 15,346      
Loans, excluding Purchased Credit Impaired Loans 88,371 86,460      
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
          
Loans by FICO, Excluding Purchased Credit Impaired Loans [Abstract]          
Less than 600 35,189 40,276      
600-639 22,232 23,073      
640-679 36,263 35,483      
680-719 52,716 51,281      
720-759 63,337 59,687      
760-799 102,300 86,996      
Greater than 800 43,148 39,271      
No FICO available 8,632 11,271      
FICO not required 5,403 4,990      
Government insured/guaranteed loans 42,165 41,901      
Loans, excluding Purchased Credit Impaired Loans $ 411,385 $ 394,229