Line of Business Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 lines_of_business	Mar. 31, 2012
Segment Reporting Information [Line Items]
Number of lines of business	2
Servicing fees	$ 1,175,000,000	$ 1,078,000,000
Management fees	263,000,000	236,000,000
Trading services	281,000,000	280,000,000
Securities finance	78,000,000	97,000,000
Processing fees and other	60,000,000	94,000,000
Total fee revenue	1,857,000,000	1,785,000,000
Net interest revenue	576,000,000	625,000,000
Gains related to investment securities, net	2,000,000	11,000,000
Total revenue	2,435,000,000	2,421,000,000
Expenses from operations	1,812,000,000	1,799,000,000
Acquisition and restructuring costs	14,000,000	21,000,000
Provisions for litigation exposure	0	15,000,000
Total expenses	1,826,000,000	1,835,000,000
Income before income tax expense	609,000,000	586,000,000
Pre-tax margin	25.00%	24.00%
Average assets	208,300,000,000	188,200,000,000
Investment Servicing
Segment Reporting Information [Line Items]
Servicing fees	1,175,000,000	1,078,000,000
Management fees	0	0
Trading services	281,000,000	280,000,000
Securities finance	69,000,000	88,000,000
Processing fees and other	31,000,000	60,000,000
Total fee revenue	1,556,000,000	1,506,000,000
Net interest revenue	557,000,000	605,000,000
Gains related to investment securities, net	2,000,000	11,000,000
Total revenue	2,115,000,000	2,122,000,000
Expenses from operations	1,586,000,000	1,566,000,000
Acquisition and restructuring costs	0	0
Provisions for litigation exposure	0	0
Total expenses	1,586,000,000	1,566,000,000
Income before income tax expense	529,000,000	556,000,000
Pre-tax margin	25.00%	26.00%
Average assets	204,400,000,000	184,300,000,000
Investment Management
Segment Reporting Information [Line Items]
Servicing fees	0	0
Management fees	263,000,000	236,000,000
Trading services	0	0
Securities finance	9,000,000	9,000,000
Processing fees and other	29,000,000	34,000,000
Total fee revenue	301,000,000	279,000,000
Net interest revenue	19,000,000	20,000,000
Gains related to investment securities, net	0	0
Total revenue	320,000,000	299,000,000
Expenses from operations	226,000,000	233,000,000
Acquisition and restructuring costs	0	0
Provisions for litigation exposure	0	0
Total expenses	226,000,000	233,000,000
Income before income tax expense	94,000,000	66,000,000
Pre-tax margin	29.00%	22.00%
Average assets	3,900,000,000	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
Net interest revenue	0	0
Gains related to investment securities, net	0	0
Total revenue	0	0
Expenses from operations	0	0
Acquisition and restructuring costs	14,000,000	21,000,000
Provisions for litigation exposure	0	15,000,000
Total expenses	14,000,000	36,000,000
Income before income tax expense	$ (14,000,000)	$ (36,000,000)