Line of Business Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 line_of_business	Jun. 30, 2012
Segment Reporting Information [Line Items]
Number of lines of business			2
Servicing fees	$ 1,201,000,000	$ 1,086,000,000	$ 2,376,000,000	$ 2,164,000,000
Management fees	277,000,000	246,000,000	540,000,000	482,000,000
Trading services	296,000,000	255,000,000	577,000,000	535,000,000
Securities finance	131,000,000	143,000,000	209,000,000	240,000,000
Processing fees and other	66,000,000	48,000,000	126,000,000	142,000,000
Total fee revenue	1,971,000,000	1,778,000,000	3,828,000,000	3,563,000,000
Net interest revenue	596,000,000	672,000,000	1,172,000,000	1,297,000,000
Gains (losses) related to investment securities, net	(7,000,000)	(27,000,000)	(5,000,000)	(16,000,000)
Total revenue	2,560,000,000	2,423,000,000	4,995,000,000	4,844,000,000
Provision for loan losses	0	(1,000,000)	0	(1,000,000)
Total expenses	1,798,000,000	1,772,000,000	3,624,000,000	3,607,000,000
Income before income tax expense	762,000,000	652,000,000	1,371,000,000	1,238,000,000
Pre-tax margin	30.00%	27.00%	27.00%	26.00%
Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	207,700,000,000	189,100,000,000	207,700,000,000	189,100,000,000
Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	208,000,000,000	188,600,000,000	208,000,000,000	188,600,000,000
Investment Servicing
Segment Reporting Information [Line Items]
Servicing fees	1,201,000,000	1,086,000,000	2,376,000,000	2,164,000,000
Management fees	0	0	0	0
Trading services	279,000,000	232,000,000	536,000,000	487,000,000
Securities finance	117,000,000	127,000,000	186,000,000	215,000,000
Processing fees and other	66,000,000	60,000,000	121,000,000	145,000,000
Total fee revenue	1,663,000,000	1,505,000,000	3,219,000,000	3,011,000,000
Net interest revenue	571,000,000	653,000,000	1,128,000,000	1,258,000,000
Gains (losses) related to investment securities, net	(7,000,000)	19,000,000	(5,000,000)	30,000,000
Total revenue	2,227,000,000	2,177,000,000	4,342,000,000	4,299,000,000
Provision for loan losses	0	(1,000,000)	0	(1,000,000)
Total expenses	1,546,000,000	1,512,000,000	3,132,000,000	3,078,000,000
Income before income tax expense	681,000,000	666,000,000	1,210,000,000	1,222,000,000
Pre-tax margin	31.00%	31.00%	28.00%	28.00%
Investment Servicing | Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	203,600,000,000	185,200,000,000	203,600,000,000	185,200,000,000
Investment Servicing | Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	204,000,000,000	184,700,000,000	204,000,000,000	184,700,000,000
Investment Management
Segment Reporting Information [Line Items]
Servicing fees			0	0
Management fees	277,000,000	246,000,000	540,000,000	482,000,000
Trading services	17,000,000	23,000,000	41,000,000	48,000,000
Securities finance	14,000,000	16,000,000	23,000,000	25,000,000
Processing fees and other	0	(12,000,000)	5,000,000	(3,000,000)
Total fee revenue	308,000,000	273,000,000	609,000,000	552,000,000
Net interest revenue	25,000,000	19,000,000	44,000,000	39,000,000
Gains (losses) related to investment securities, net	0	0	0	0
Total revenue	333,000,000	292,000,000	653,000,000	591,000,000
Provision for loan losses	0	0	0	0
Total expenses	207,000,000	216,000,000	433,000,000	449,000,000
Income before income tax expense	126,000,000	76,000,000	220,000,000	142,000,000
Pre-tax margin	38.00%	26.00%	34.00%	24.00%
Investment Management | Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	4,100,000,000	3,900,000,000	4,100,000,000	3,900,000,000
Investment Management | Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	4,000,000,000	3,900,000,000	4,000,000,000	3,900,000,000
Other
Segment Reporting Information [Line Items]
Servicing fees			0	0
Management fees			0	0
Trading services			0	0
Securities finance			0	0
Processing fees and other			0	0
Total fee revenue	0	0	0	0
Net interest revenue			0	0
Gains (losses) related to investment securities, net	0	(46,000,000)	0	(46,000,000)
Total revenue	0	(46,000,000)	0	(46,000,000)
Provision for loan losses	0	0	0	0
Total expenses	45,000,000	44,000,000	59,000,000	80,000,000
Income before income tax expense	$ (45,000,000)	$ (90,000,000)	$ (59,000,000)	$ (126,000,000)