Noninterest Expense (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Components of noninterest expense [Abstract]
Compensation expense	$ 6,908,000,000	$ 6,661,000,000	$ 22,740,000,000	$ 21,553,000,000
Noncompensation expense:
Occupancy expense	935,000,000	884,000,000	2,848,000,000	2,636,000,000
Technology, communications and equipment expense	1,248,000,000	1,184,000,000	3,665,000,000	3,486,000,000
Professional and outside services	1,860,000,000	1,718,000,000	5,461,000,000	4,978,000,000
Marketing	926,000,000	651,000,000	2,329,000,000	1,862,000,000
Other expense	3,445,000,000	3,082,000,000	10,687,000,000	9,942,000,000
Amortization of intangibles	212,000,000	218,000,000	641,000,000	696,000,000
Total noncompensation expense	8,626,000,000	7,737,000,000	25,631,000,000	23,600,000,000
Total noninterest expense	15,534,000,000	14,398,000,000	48,371,000,000	45,153,000,000
Other expenses, additional details
Foreclosed Real Estate Expense	151,000,000	251,000,000	535,000,000	798,000,000
Pending or Threatened Litigation [Member]
Other expenses, additional details
Loss Contingency, Loss in Period	$ 1,300,000,000	$ 1,500,000,000	$ 4,300,000,000	$ 5,200,000,000