Loans and Allowance for Credit Losses, Loans Outstanding (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Loans and Allowance for Credit Losses [Abstract]
Loans	$ 751,921	$ 757,267
Commercial and Industrial Loans [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	157,095	151,284
Commercial Real Estate Mortgage [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	101,458	99,435
Commercial Real Estate Construction [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	21,374	25,333
Lease Financing [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	12,907	13,094
Foreign Loans [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	37,855	32,912
Total Commercial [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	330,689	322,058
Other revolving credit and installment [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	87,220	86,565
Real estate 1-4 family first mortgage [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	222,874	230,235
Real estate 1-4 family junior lien mortgage [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	89,947	96,149
Total Consumer [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	421,232	435,209
Credit Card Receivable [Member]
Loans and Allowance for Credit Losses [Abstract]
Loans	$ 21,191	$ 22,260