Loans by Delinquency Status, Commercial (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Financing Receivable, Delinquency Status
90+ DPD and accruing	$ 17,318	$ 18,488
Nonaccruing	23,045	26,242
Purchased Credit Impaired Loans	38,693	41,430
Loans	751,921	757,267
Commercial and Industrial Loans [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Financing Receivable, Delinquency Status
Current-29 DPD	152,872	146,135
30-89 DPD and accruing	1,193	910
90+ DPD and accruing	110	308
Nonaccruing	2,393	3,213
Loans, excluding Purchased Credit Impaired Loans	156,568	150,566
Purchased Credit Impaired Loans	527	718
Loans	157,095	151,284
Commercial Real Estate Construction [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Financing Receivable, Delinquency Status
Current-29 DPD	16,685	19,005
30-89 DPD and accruing	372	510
90+ DPD and accruing	86	193
Nonaccruing	2,043	2,676
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 Mortgage [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Financing Receivable, Delinquency Status
Current-29 DPD	92,554	90,233
30-89 DPD and accruing	1,276	1,016
90+ DPD and accruing	137	104
Nonaccruing	4,691	5,227
Loans, excluding Purchased Credit Impaired Loans	98,658	96,580
Purchased Credit Impaired Loans	2,800	2,855
Loans	101,458	99,435
Lease Financing [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Financing Receivable, Delinquency Status
Current-29 DPD	12,787	12,927
30-89 DPD and accruing	41	59
90+ DPD and accruing	0	0
Nonaccruing	79	108
Loans, excluding Purchased Credit Impaired Loans	12,907	13,094
Purchased Credit Impaired Loans	0	0
Loans	12,907	13,094
Foreign Loans [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Financing Receivable, Delinquency Status
Current-29 DPD	36,200	31,350
30-89 DPD and accruing	83	0
90+ DPD and accruing	12	22
Nonaccruing	59	127
Loans, excluding Purchased Credit Impaired Loans	36,354	31,499
Purchased Credit Impaired Loans	1,501	1,413
Loans	37,855	32,912
Total Commercial [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Financing Receivable, Delinquency Status
Current-29 DPD	311,098	299,650
30-89 DPD and accruing	2,965	2,495
90+ DPD and accruing	345	627
Nonaccruing	9,265	11,351
Loans, excluding Purchased Credit Impaired Loans	323,673	314,123
Purchased Credit Impaired Loans	7,016	7,935
Loans	330,689	322,058
Commercial and Industrial Loans [Member]
Financing Receivable, Delinquency Status
Nonaccruing	2,393	3,213
Purchased Credit Impaired Loans	527	718
Loans	157,095	151,284
Commercial Real Estate Mortgage [Member]
Financing Receivable, Delinquency Status
Nonaccruing	4,691	5,227
Purchased Credit Impaired Loans	2,800	2,855
Loans	101,458	99,435
Commercial Real Estate Construction [Member]
Financing Receivable, Delinquency Status
Nonaccruing	2,043	2,676
Purchased Credit Impaired Loans	2,188	2,949
Loans	21,374	25,333
Lease Financing [Member]
Financing Receivable, Delinquency Status
Nonaccruing	79	108
Loans	12,907	13,094
Foreign Loans [Member]
Financing Receivable, Delinquency Status
Nonaccruing	59	127
Purchased Credit Impaired Loans	1,501	1,413
Loans	37,855	32,912
Total Commercial [Member]
Financing Receivable, Delinquency Status
Nonaccruing	9,265	11,351
Purchased Credit Impaired Loans	7,016	7,935
Loans	$ 330,689	$ 322,058