90 Days Past Due but Still Accruing Loans (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	$ 17,318	$ 18,488
Commercial and Industrial Loans [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	110	308
Total Consumer [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	1,485	2,022
Commercial Real Estate Construction [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	86	193
Commercial Real Estate Mortgage [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	137	104
Foreign Loans [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	12	22
Total Commercial [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	345	627
Real estate 1-4 family junior lien mortgage [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	286	366
Other revolving credit and installment [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	137	199
Real estate 1-4 family first mortgage [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	728	941
Credit Card Receivable [Member] | Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	334	516
Total, not government insured/guaranteed
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	1,830	2,649
FHA Insured/Guaranteed by VA [Member]
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	14,474	14,733
Student Loans under FFELP [Member]
90 days Past Due but Still Accruing Loans [Abstract]
90 days past due but still accruing	$ 1,014	$ 1,106