Line of Business Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 lines_of_business	Sep. 30, 2011
Segment Reporting Information [Line Items]
Lines of business			2
Servicing fees	$ 1,100,000,000	$ 1,106,000,000	$ 3,264,000,000	$ 3,325,000,000
Management fees	251,000,000	229,000,000	733,000,000	715,000,000
Trading services	232,000,000	334,000,000	767,000,000	947,000,000
Securities finance	91,000,000	85,000,000	331,000,000	288,000,000
Processing fees and other	45,000,000	90,000,000	187,000,000	252,000,000
Total fee revenue	1,719,000,000	1,844,000,000	5,282,000,000	5,527,000,000
Net interest revenue	619,000,000	578,000,000	1,916,000,000	1,727,000,000
Gains (Losses) related to investment securities, net	18,000,000	5,000,000	2,000,000	25,000,000
Total revenue	2,356,000,000	2,427,000,000	7,200,000,000	7,279,000,000
Provision for loan losses	0	0	(1,000,000)	1,000,000
Expenses from operations	1,664,000,000	1,713,000,000	5,191,000,000	5,153,000,000
Claims resolution	(362,000,000)	0	(362,000,000)	0
Provision for litigation exposure and other costs	85,000,000	0	107,000,000	0
Acquisition and restructuring costs	28,000,000	85,000,000	86,000,000	121,000,000
Total expenses	1,415,000,000	1,798,000,000	5,022,000,000	5,274,000,000
Income before income tax expense	941,000,000	629,000,000	2,179,000,000	2,004,000,000
Investment Servicing [Member]
Segment Reporting Information [Line Items]
Servicing fees	1,100,000,000	1,106,000,000	3,264,000,000	3,325,000,000
Management fees	0	0	0	0
Trading services	232,000,000	334,000,000	767,000,000	947,000,000
Securities finance	81,000,000	77,000,000	296,000,000	252,000,000
Processing fees and other	15,000,000	57,000,000	112,000,000	179,000,000
Total fee revenue	1,428,000,000	1,574,000,000	4,439,000,000	4,703,000,000
Net interest revenue	600,000,000	553,000,000	1,854,000,000	1,647,000,000
Gains (Losses) related to investment securities, net	18,000,000	5,000,000	48,000,000	25,000,000
Total revenue	2,046,000,000	2,132,000,000	6,341,000,000	6,375,000,000
Provision for loan losses			(1,000,000)	1,000,000
Expenses from operations	1,456,000,000	1,475,000,000	4,530,000,000	4,452,000,000
Claims resolution	0	0	0	0
Provision for litigation exposure and other costs	0	0	0	0
Acquisition and restructuring costs	0	0	0	0
Total expenses	1,456,000,000	1,475,000,000	4,530,000,000	4,452,000,000
Income before income tax expense	590,000,000	657,000,000	1,812,000,000	1,922,000,000
Pre-tax margin	29.00%	31.00%	29.00%	30.00%
Investment Management [Member]
Segment Reporting Information [Line Items]
Management fees	251,000,000	229,000,000	733,000,000	715,000,000
Trading services	0	0	0	0
Securities finance	10,000,000	8,000,000	35,000,000	36,000,000
Processing fees and other	30,000,000	33,000,000	75,000,000	73,000,000
Total fee revenue	291,000,000	270,000,000	843,000,000	824,000,000
Net interest revenue	19,000,000	25,000,000	62,000,000	80,000,000
Gains (Losses) related to investment securities, net	0	0	0	0
Total revenue	310,000,000	295,000,000	905,000,000	904,000,000
Provision for loan losses			0	0
Expenses from operations	208,000,000	238,000,000	661,000,000	701,000,000
Claims resolution	0	0	0	0
Provision for litigation exposure and other costs	0	0	0	0
Acquisition and restructuring costs	0	0	0	0
Total expenses	208,000,000	238,000,000	661,000,000	701,000,000
Income before income tax expense	102,000,000	57,000,000	244,000,000	203,000,000
Pre-tax margin	33.00%	19.00%	27.00%	22.00%
Other [Member]
Segment Reporting Information [Line Items]
Gains (Losses) related to investment securities, net			(46,000,000)
Total revenue			(46,000,000)
Provision for loan losses			0
Expenses from operations			0
Claims resolution	(362,000,000)		(362,000,000)
Provision for litigation exposure and other costs	85,000,000		107,000,000
Acquisition and restructuring costs	28,000,000	85,000,000	86,000,000	121,000,000
Total expenses	(249,000,000)	85,000,000	(169,000,000)	121,000,000
Income before income tax expense	249,000,000	(85,000,000)	123,000,000	(121,000,000)
Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	195,800,000,000	181,000,000,000	195,800,000,000	181,000,000,000
Quarter To Date [Member] | Investment Servicing [Member]
Segment Reporting Information [Line Items]
Average assets	191,600,000,000	177,000,000,000	191,600,000,000	177,000,000,000
Quarter To Date [Member] | Investment Management [Member]
Segment Reporting Information [Line Items]
Average assets	4,200,000,000	4,000,000,000	4,200,000,000	4,000,000,000
Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	191,000,000,000	168,000,000,000	191,000,000,000	168,000,000,000
Year To Date [Member] | Investment Servicing [Member]
Segment Reporting Information [Line Items]
Average assets	187,000,000,000	163,400,000,000	187,000,000,000	163,400,000,000
Year To Date [Member] | Investment Management [Member]
Segment Reporting Information [Line Items]
Average assets	$ 4,000,000,000	$ 4,600,000,000	$ 4,000,000,000	$ 4,600,000,000