Line Of Business Information (Summary Of Line Of Business Results) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Servicing fees	$ 1,106,000,000	$ 1,006,000,000	$ 3,325,000,000	$ 2,874,000,000
Management fees	229,000,000	196,000,000	715,000,000	608,000,000
Trading services	334,000,000	228,000,000	947,000,000	796,000,000
Securities finance	85,000,000	68,000,000	288,000,000	249,000,000
Processing fees and other	90,000,000	71,000,000	252,000,000	278,000,000
Total fee revenue	1,844,000,000	1,569,000,000	5,527,000,000	4,805,000,000
Net interest revenue	578,000,000	724,000,000	1,727,000,000	2,043,000,000
Gains (Losses) related to investment securities, net	5,000,000	17,000,000	25,000,000	62,000,000
Total revenue	2,427,000,000	2,310,000,000	7,279,000,000	6,910,000,000
Provision for loan losses		1,000,000	1,000,000	26,000,000
Expenses from operations	1,713,000,000	1,504,000,000	5,153,000,000	4,559,000,000
Acquisition and restructuring costs	85,000,000	23,000,000	121,000,000	77,000,000
Securities lending charge				414,000,000
Total expenses	1,798,000,000	1,527,000,000	5,274,000,000	5,050,000,000
Income (Loss) from continuing operations before income taxes	629,000,000	782,000,000	2,004,000,000	1,834,000,000
Average assets	181,000,000,000	154,000,000,000	168,000,000,000	149,400,000,000
Investment Servicing [Member]
Servicing fees	1,106,000,000	1,006,000,000	3,325,000,000	2,874,000,000
Trading services	334,000,000	228,000,000	947,000,000	796,000,000
Securities finance	77,000,000	62,000,000	252,000,000	204,000,000
Processing fees and other	57,000,000	39,000,000	179,000,000	192,000,000
Total fee revenue	1,574,000,000	1,335,000,000	4,703,000,000	4,066,000,000
Net interest revenue	539,000,000	688,000,000	1,593,000,000	1,928,000,000
Gains (Losses) related to investment securities, net	5,000,000	17,000,000	25,000,000	62,000,000
Total revenue	2,118,000,000	2,040,000,000	6,321,000,000	6,056,000,000
Provision for loan losses		1,000,000	1,000,000	26,000,000
Expenses from operations	1,477,000,000	1,341,000,000	4,468,000,000	3,980,000,000
Securities lending charge				75,000,000
Total expenses	1,477,000,000	1,341,000,000	4,468,000,000	4,055,000,000
Income (Loss) from continuing operations before income taxes	641,000,000	698,000,000	1,852,000,000	1,975,000,000
Pre-tax margin	30.00%	34.00%	29.00%	33.00%
Average assets	175,900,000,000	149,400,000,000	162,500,000,000	144,300,000,000
Investment Management [Member]
Management fees	229,000,000	196,000,000	715,000,000	608,000,000
Securities finance	8,000,000	6,000,000	36,000,000	45,000,000
Processing fees and other	33,000,000	32,000,000	73,000,000	86,000,000
Total fee revenue	270,000,000	234,000,000	824,000,000	739,000,000
Net interest revenue	39,000,000	36,000,000	134,000,000	115,000,000
Total revenue	309,000,000	270,000,000	958,000,000	854,000,000
Expenses from operations	236,000,000	163,000,000	685,000,000	579,000,000
Securities lending charge				339,000,000
Total expenses	236,000,000	163,000,000	685,000,000	918,000,000
Income (Loss) from continuing operations before income taxes	73,000,000	107,000,000	273,000,000	(64,000,000)
Pre-tax margin	24.00%	40.00%	28.00%	0.00%
Average assets	5,100,000,000	4,600,000,000	5,500,000,000	5,100,000,000
Other [Member]
Acquisition and restructuring costs	85,000,000	23,000,000	121,000,000	77,000,000
Total expenses	85,000,000	23,000,000	121,000,000	77,000,000
Income (Loss) from continuing operations before income taxes	$ (85,000,000)	$ (23,000,000)	$ (121,000,000)	$ (77,000,000)