Other Assets (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Components of Other Assets [Abstract]
Cost Method Investments	$ 8,029		$ 8,029		$ 8,494
Equity method	7,758		7,758		7,624
Principal investments	291		291		305
Total nonmarketable equity investments	16,078		16,078		16,423
Corporate/bank-owned life insurance	20,018		20,018		19,845
Accounts receivable	19,375		19,375		23,763
Interest receivable	5,009		5,009		4,895
Customer relationship and other amortized intangibles	11,223		11,223		12,170
Foreclosed Assets [Abstract]
Operating lease assets	1,757		1,757		1,873
Due from Customer Acceptances	232		232		229
Other	14,687		14,687		15,993
Total other assets	91,818		91,818		99,781
Income Related to Nonmarketable Equity Investments [Abstract]
Net gains (losses) from private equity investments	348	155	569	154
Net gains (losses) from principal investments	14	12	32	21
Net gains (losses) from all other nonmarketable equity investments	(121)	(21)	(181)	(38)
Net gains (losses) from nonmarketable equity investments	241	146	420	137
Private Equity Investments [Member]
Components of Other Assets [Abstract]
Cost Method Investments	3,143		3,143		3,240
Federal Bank Stock [Member]
Components of Other Assets [Abstract]
Cost Method Investments	4,886		4,886		5,254
Government insured/guaranteed
Foreclosed Assets [Abstract]
Foreclosed assets	1,320		1,320		1,479
Non-government insured/guaranteed
Foreclosed Assets [Abstract]
Foreclosed assets	3,541		3,541		4,530
Core Deposits [Member]
Components of Other Assets [Abstract]
Customer relationship and other amortized intangibles	8,099		8,099		8,904
Customer Relationships [Member]
Components of Other Assets [Abstract]
Customer relationship and other amortized intangibles	$ 1,702		$ 1,702		$ 1,847