Loans by Credit Quality Indicator (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Financing Receivable, Delinquency Status
Purchased Credit Impaired Loans	$ 38,693	$ 41,430
Loans	751,921	757,267
Commercial and Industrial Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	156,568	150,566
Purchased Credit Impaired Loans	527	718
Loans	157,095	151,284
Commercial and Industrial Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Criticized [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	22,883	24,508
Commercial and Industrial Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Pass [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	133,685	126,058
Commercial Real Estate Construction [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	19,186	22,384
Purchased Credit Impaired Loans	2,188	2,949
Loans	21,374	25,333
Commercial Real Estate Construction [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Criticized [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	8,640	11,128
Commercial Real Estate Construction [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Pass [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	10,546	11,256
Commercial Real Estate Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	98,658	96,580
Purchased Credit Impaired Loans	2,800	2,855
Loans	101,458	99,435
Commercial Real Estate Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Criticized [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	24,476	25,983
Commercial Real Estate Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Pass [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	74,182	70,597
Lease Financing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	12,907	13,094
Purchased Credit Impaired Loans	0	0
Loans	12,907	13,094
Lease Financing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Criticized [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	558	683
Lease Financing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Pass [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	12,349	12,411
Foreign Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	36,354	31,499
Purchased Credit Impaired Loans	1,501	1,413
Loans	37,855	32,912
Foreign Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Criticized [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	1,246	1,158
Foreign Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Pass [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	35,108	30,341
Total Commercial [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	323,673	314,123
Purchased Credit Impaired Loans	7,016	7,935
Loans	330,689	322,058
Total Commercial [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Criticized [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	57,803	63,460
Total Commercial [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Pass [Member]
Financing Receivable, Delinquency Status
Loans, excluding Purchased Credit Impaired Loans	265,870	250,663
Commercial and Industrial Loans [Member]
Financing Receivable, Delinquency Status
Purchased Credit Impaired Loans	527	718
Loans	157,095	151,284
Commercial Real Estate Mortgage [Member]
Financing Receivable, Delinquency Status
Purchased Credit Impaired Loans	2,800	2,855
Loans	101,458	99,435
Commercial Real Estate Construction [Member]
Financing Receivable, Delinquency Status
Purchased Credit Impaired Loans	2,188	2,949
Loans	21,374	25,333
Lease Financing [Member]
Financing Receivable, Delinquency Status
Loans	12,907	13,094
Foreign Loans [Member]
Financing Receivable, Delinquency Status
Purchased Credit Impaired Loans	1,501	1,413
Loans	37,855	32,912
Total Commercial [Member]
Financing Receivable, Delinquency Status
Purchased Credit Impaired Loans	7,016	7,935
Loans	$ 330,689	$ 322,058