Non-U.S. Activities (Schedule Of Results From Non-U.S. Operations) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Segment Reporting Information [Line Items]
Total fee revenue	$ 7,194	$ 6,540	$ 5,935
Net interest revenue	2,333	2,699	2,564
Gains (Losses) related to investment securities, net	67	(286)	141
Total revenue	9,594	8,953	8,640
Expenses	7,058	6,842	5,966
Income before income taxes	2,536	2,086	2,525
Income tax expense	616	530	722
Net income (loss)	1,920	1,556	(1,881)
Non- U.S. [Member]
Segment Reporting Information [Line Items]
Total fee revenue	3,004	2,661	2,291
Net interest revenue	1,104	725	422
Gains (Losses) related to investment securities, net	(25)	449	(37)
Total revenue	4,083	3,835	2,676
Expenses	3,415	2,962	2,457
Income before income taxes	668	873	219
Income tax expense	172	327	84
Net income (loss)	496	546	135
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 1,040	$ 1,180