Consolidated Statements of Income (Unaudited) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Derivative Liabilities	$ 74,767,000,000
Derivative Assets	85,010,000,000
Other Assets	102,826,000,000
Revenue
Investment banking fees	1,381,000,000		1,793,000,000
Principal transactions	2,722,000,000		4,745,000,000
Lending-and deposit-related fees	1,517,000,000		1,546,000,000
Asset management, administration and commissions	3,392,000,000		3,606,000,000
Securities gains	536,000,000	[1]	102,000,000	[1]
Mortgage fees and related income	2,010,000,000		(487,000,000)
Credit card income	1,316,000,000		1,437,000,000
Other income	1,512,000,000		574,000,000
Noninterest revenue	14,386,000,000		13,316,000,000
Interest income	14,701,000,000		15,447,000,000
Interest expense	3,035,000,000		3,542,000,000
Net interest income	11,666,000,000		11,905,000,000
Total net revenue	26,052,000,000		25,221,000,000
Provision for credit losses	726,000,000		1,169,000,000
Noninterest expense
Compensation expense	8,613,000,000		8,263,000,000
Occupancy expense	961,000,000		978,000,000
Technology, communications and equipment expense	1,271,000,000		1,200,000,000
Professional and outside services	1,795,000,000		1,735,000,000
Marketing	680,000,000		659,000,000
Other expense	4,832,000,000		2,943,000,000
Amortization of intangibles	193,000,000		217,000,000
Total noninterest expense	18,345,000,000		15,995,000,000
Income before income tax expense	6,981,000,000		8,057,000,000
Income tax expense	2,057,000,000		2,502,000,000
Net income	4,924,000,000		5,555,000,000
Net income applicable to common stockholders	4,577,000,000		5,136,000,000
Per common share data - Basic earnings per share
Net income	$ 1.20		$ 1.29
Per common share data - Diluted earnings per share
Net income	$ 1.19		$ 1.28
Weighted-average basic shares	3,818.8		3,981.6
Weighted-average diluted shares	3,833.4		4,014.1
Cash dividends declared per common share	$ 0.30		$ 0.25
Other-than-temporary impairment losses included in securities gains
Total other-than-temporary impairment losses	(10,000,000)		(27,000,000)
Losses recorded in/(reclassified from) other comprehensive income	3,000,000		(3,000,000)
Total credit losses recognized in income	(7,000,000)		(30,000,000)
Previously reported value
Derivative Liabilities	74,474,000,000
Derivative Assets	85,377,000,000
Other Assets	102,625,000,000
Revenue
Principal transactions	3,382,000,000
Noninterest revenue	15,046,000,000
Total net revenue	26,712,000,000
Noninterest expense
Income before income tax expense	7,641,000,000
Income tax expense	2,258,000,000
Net income	5,383,000,000
Net income applicable to common stockholders	5,017,000,000
Per common share data - Basic earnings per share
Net income	$ 1,310,000.00
Per common share data - Diluted earnings per share
Net income	$ 1,310,000.00
Restatement Adjustment [Member]
Derivative Liabilities	293,000,000
Derivative Assets	(367,000,000)
Other Assets	201,000,000
Revenue
Principal transactions	(660,000,000)
Noninterest revenue	(660,000,000)
Total net revenue	(660,000,000)
Noninterest expense
Income before income tax expense	(660,000,000)
Income tax expense	(201,000,000)
Net income	(459,000,000)
Net income applicable to common stockholders	$ (440,000,000)
Per common share data - Basic earnings per share
Net income	$ (110,000.00)
Per common share data - Diluted earnings per share
Net income	$ (120,000.00)

[1] (a)The following other-than-temporary impairment losses are included in securities gains for the periods presented.