Line Of Business Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 lines_of_business	Jun. 30, 2011
Segment Reporting Information [Line Items]
Lines of business			2
Servicing fees	$ 1,086,000,000	$ 1,124,000,000	$ 2,164,000,000	$ 2,219,000,000
Management fees	246,000,000	250,000,000	482,000,000	486,000,000
Trading services	255,000,000	311,000,000	535,000,000	613,000,000
Securities finance	143,000,000	137,000,000	240,000,000	203,000,000
Processing fees and other	48,000,000	70,000,000	142,000,000	162,000,000
Total fee revenue	1,778,000,000	1,892,000,000	3,563,000,000	3,683,000,000
Net interest revenue	672,000,000	572,000,000	1,297,000,000	1,149,000,000
Gains (Losses) related to investment securities, net	(27,000,000)	27,000,000	(16,000,000)	20,000,000
Total revenue	2,423,000,000	2,491,000,000	4,844,000,000	4,852,000,000
Provision for loan losses	(1,000,000)	2,000,000	(1,000,000)	1,000,000
Expenses from operations	1,728,000,000	1,757,000,000	3,527,000,000	3,440,000,000
Acquisition and restructuring costs	37,000,000	17,000,000	58,000,000	36,000,000
Litigation settlement costs	7,000,000	0	22,000,000	0
Total expenses	1,772,000,000	1,774,000,000	3,607,000,000	3,476,000,000
Income before income tax expense	652,000,000	715,000,000	1,238,000,000	1,375,000,000
Investment Servicing [Member]
Segment Reporting Information [Line Items]
Servicing fees	1,086,000,000	1,124,000,000	2,164,000,000	2,219,000,000
Management fees	0	0	0	0
Trading services	255,000,000	311,000,000	535,000,000	613,000,000
Securities finance	127,000,000	116,000,000	215,000,000	175,000,000
Processing fees and other	37,000,000	53,000,000	97,000,000	122,000,000
Total fee revenue	1,505,000,000	1,604,000,000	3,011,000,000	3,129,000,000
Net interest revenue	650,000,000	546,000,000	1,254,000,000	1,094,000,000
Gains (Losses) related to investment securities, net	19,000,000	27,000,000	30,000,000	20,000,000
Total revenue	2,174,000,000	2,177,000,000	4,295,000,000	4,243,000,000
Provision for loan losses	(1,000,000)	2,000,000	(1,000,000)	1,000,000
Expenses from operations	1,511,000,000	1,529,000,000	3,074,000,000	2,977,000,000
Acquisition and restructuring costs	0	0	0	0
Securities Lending Charge			0	0
Litigation settlement costs	0	0
Total expenses	1,511,000,000	1,529,000,000	3,074,000,000	2,977,000,000
Income before income tax expense	664,000,000	646,000,000	1,222,000,000	1,265,000,000
Pre-tax margin	31.00%	30.00%	28.00%	30.00%
Investment Management [Member]
Segment Reporting Information [Line Items]
Management fees	246,000,000	250,000,000	482,000,000	486,000,000
Trading services	0	0	0	0
Securities finance	16,000,000	21,000,000	25,000,000	28,000,000
Processing fees and other	11,000,000	17,000,000	45,000,000	40,000,000
Total fee revenue	273,000,000	288,000,000	552,000,000	554,000,000
Net interest revenue	22,000,000	26,000,000	43,000,000	55,000,000
Gains (Losses) related to investment securities, net	0	0	0	0
Total revenue	295,000,000	314,000,000	595,000,000	609,000,000
Provision for loan losses	0	0	0	0
Expenses from operations	217,000,000	228,000,000	453,000,000	463,000,000
Acquisition and restructuring costs	0	0	0	0
Securities Lending Charge			0	0
Litigation settlement costs	0	0
Total expenses	217,000,000	228,000,000	453,000,000	463,000,000
Income before income tax expense	78,000,000	86,000,000	142,000,000	146,000,000
Pre-tax margin	26.00%	27.00%	24.00%	24.00%
Other [Member]
Segment Reporting Information [Line Items]
Gains (Losses) related to investment securities, net	(46,000,000)		(46,000,000)
Total revenue	(46,000,000)		(46,000,000)
Provision for loan losses	0		0
Expenses from operations	0		0
Acquisition and restructuring costs	37,000,000	17,000,000	58,000,000	36,000,000
Securities Lending Charge			22,000,000	0
Litigation settlement costs	7,000,000	0
Total expenses	44,000,000	17,000,000	80,000,000	36,000,000
Income before income tax expense	(90,000,000)	(17,000,000)	(126,000,000)	(36,000,000)
Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	189,100,000,000	164,300,000,000	189,100,000,000	164,300,000,000
Quarter To Date [Member] | Investment Servicing [Member]
Segment Reporting Information [Line Items]
Average assets	184,900,000,000	159,100,000,000	184,900,000,000	159,100,000,000
Quarter To Date [Member] | Investment Management [Member]
Segment Reporting Information [Line Items]
Average assets	4,200,000,000	5,200,000,000	4,200,000,000	5,200,000,000
Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	188,600,000,000	161,400,000,000	188,600,000,000	161,400,000,000
Year To Date [Member] | Investment Servicing [Member]
Segment Reporting Information [Line Items]
Average assets	184,500,000,000	156,500,000,000	184,500,000,000	156,500,000,000
Year To Date [Member] | Investment Management [Member]
Segment Reporting Information [Line Items]
Average assets	$ 4,100,000,000	$ 4,900,000,000	$ 4,100,000,000	$ 4,900,000,000