Line of Business Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 line_of_business	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of lines of business	2
Acquisition and restructuring costs	$ 33	$ 14
Severance costs	72
Servicing fees	1,238	1,175
Management fees	292	263
Trading services	239	281
Securities finance	85	78
Processing fees and other	70	60
Total fee revenue	1,924	1,857
Net interest revenue	555	576
Gains (losses) related to investment securities, net	6	2
Total revenue	2,485	2,435
Provision for loan losses	2	0
Total expenses	2,028	1,826
Income before income tax expense	455	609
Pre-tax margin	18.00%	25.00%
Average assets	256,663		243,291
Investment Servicing
Segment Reporting Information [Line Items]
Servicing fees	1,238	1,175
Management fees	0	0
Trading services	227	257
Securities finance	85	78
Processing fees and other	69	55
Total fee revenue	1,619	1,565
Net interest revenue	538	557
Gains (losses) related to investment securities, net	6	2
Total revenue	2,163	2,124
Provision for loan losses	2	0
Total expenses	1,673	1,590
Income before income tax expense	488	534
Pre-tax margin	23.00%	25.00%
Average assets	212,200	204,400
Investment Management
Segment Reporting Information [Line Items]
Servicing fees	0	0
Management fees	292	263
Trading services	12	24
Securities finance	0	0
Processing fees and other	1	5
Total fee revenue	305	292
Net interest revenue	17	19
Gains (losses) related to investment securities, net	0	0
Total revenue	322	311
Provision for loan losses	0	0
Total expenses	244	222
Income before income tax expense	78	89
Pre-tax margin	24.00%	29.00%
Average assets	3,400	3,900
Other
Segment Reporting Information [Line Items]
Acquisition and restructuring costs	33
Provision for litigation exposure and other costs	6
Claims resolution		14
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 (losses) related to investment securities, net	0	0
Total revenue	0	0
Provision for loan losses	0	0
Total expenses	111	14
Income before income tax expense	(111)	(14)
Total Average Assets
Segment Reporting Information [Line Items]
Average assets	$ 215,600	$ 208,300