v2.4.0.6
Loans and Allowance for Credit Losses, 90 Days Past Due but Still Accruing (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing $ 22,569 $ 18,488
FHA Insured/VA Guaranteed [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 19,240 14,733
Student Loans under FFELP [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 1,281 1,106
Total Consumer [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 11,500 13,000
Total, not government insured/guaranteed
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 2,048 2,649
Total, not government insured/guaranteed | Commercial and Industrial Loans [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 153 308
Total, not government insured/guaranteed | Commercial Real Estate Mortgage [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 256 104
Total, not government insured/guaranteed | Commercial Real Estate Construction [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 89 193
Total, not government insured/guaranteed | Foreign Loans [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 6 22
Total, not government insured/guaranteed | Total Commercial [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 504 627
Total, not government insured/guaranteed | Real estate 1-4 family first mortgage [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 781 941
Total, not government insured/guaranteed | Real estate 1-4 family junior lien mortgage [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 279 366
Total, not government insured/guaranteed | Credit Card [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 346 516
Total, not government insured/guaranteed | Other revolving credit and installment [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing 138 199
Total, not government insured/guaranteed | Total Consumer [Member]
    
90 days Past Due but Still Accruing Loans [Abstract]    
90 days past due but still accruing $ 1,544 $ 2,022