Non-U.S. Activities (Schedule Of Results From Non-U.S. Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Total fee revenue	$ 1,719		$ 1,844		$ 5,282	$ 5,527
Net interest revenue	619		578		1,916	1,727
Gains (Losses) related to investment securities, net	18		5		2	25
Total revenue	2,356		2,427		7,200	7,279
Expenses	1,415		1,798		5,022	5,274
Income before income tax expense	941		629		2,179	2,004
Income tax expense	267		74		588	465
Net income	674		555		1,591	1,539
Available-for-sale Securities, Gross Realized Losses	0	[1]	9	[1]	46	12	[1]
Non- U.S. [Member]
Segment Reporting Information [Line Items]
Total fee revenue	700		757		2,169	2,293
Net interest revenue	235		258		709	722
Gains (Losses) related to investment securities, net	(4)		(6)		(36)	(15)
Total revenue	931		1,009		2,842	3,000
Expenses	729		791		2,286	2,421
Income before income tax expense	202		218		556	579
Income tax expense	51		54		139	146
Net income	151		164		417	433
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total revenue			$ 258			$ 766

[1] Loss for the nine months ended September 30, 2012 resulted from the sale of all of our Greek securities in the three months ended June 30, 2012, which were previously classified as held to maturity. The sale was undertaken as a result of the effect of significant deterioration in the creditworthiness of the underlying collateral, including significant downgrades of the securities' published credit ratings.