Non-U.S. Activities (Schedule Of Results From Non-U.S. Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Total fee revenue	$ 1,785	$ 1,791
Net interest revenue	625	577
Gains (Losses) related to investment securities, net	11	(7)
Total revenue	2,421	2,361
Expenses	1,835	1,702
Income before income taxes	586	660
Income tax expense	159	189
Net income (loss)	427	471
Non- U.S. [Member]
Segment Reporting Information [Line Items]
Total fee revenue	738	743
Net interest revenue	210	218
Gains (Losses) related to investment securities, net	3	(6)
Total revenue	951	955
Expenses	789	769
Income before income taxes	162	186
Income tax expense	40	48
Net income (loss)	122	138
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 242	$ 227