Line of Business Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 line_of_business	Sep. 30, 2013
Segment Reporting Information [Line Items]
Number of lines of business			2
Severance costs	$ (2,000,000)		$ 74,000,000
Acquisition and restructuring costs	(20,000,000)	(30,000,000)	(81,000,000)	(74,000,000)
Servicing fees	1,302,000,000	1,211,000,000	3,828,000,000	3,587,000,000
Management fees	316,000,000	276,000,000	908,000,000	816,000,000
Trading services	278,000,000	265,000,000	791,000,000	858,000,000
Securities finance	99,000,000	74,000,000	331,000,000	283,000,000
Processing fees and other	17,000,000	57,000,000	117,000,000	167,000,000
Total fee revenue	2,012,000,000	1,883,000,000	5,975,000,000	5,711,000,000
Net interest revenue	570,000,000	546,000,000	1,686,000,000	1,718,000,000
Gains (losses) related to investment securities, net	0	(4,000,000)	4,000,000	(9,000,000)
Total revenue	2,582,000,000	2,425,000,000	7,665,000,000	7,420,000,000
Provision for loan losses	2,000,000	0	6,000,000	0
Total expenses	1,892,000,000	1,722,000,000	5,770,000,000	5,346,000,000
Income before income tax expense	688,000,000	703,000,000	1,889,000,000	2,074,000,000
Pre-tax margin	27.00%	29.00%	25.00%	28.00%
Total Average Assets	247,300,000,000	201,300,000,000	232,600,000,000	205,700,000,000
Investment Servicing
Segment Reporting Information [Line Items]
Servicing fees	1,302,000,000	1,211,000,000	3,828,000,000	3,587,000,000
Management fees	0	0	0	0
Trading services	266,000,000	251,000,000	756,000,000	803,000,000
Securities finance	99,000,000	74,000,000	331,000,000	283,000,000
Processing fees and other	25,000,000	52,000,000	122,000,000	157,000,000
Total fee revenue	1,692,000,000	1,588,000,000	5,037,000,000	4,830,000,000
Net interest revenue	551,000,000	527,000,000	1,634,000,000	1,655,000,000
Gains (losses) related to investment securities, net	0	(4,000,000)	4,000,000	(9,000,000)
Total revenue	2,243,000,000	2,111,000,000	6,675,000,000	6,476,000,000
Provision for loan losses	2,000,000	0	6,000,000	0
Total expenses	1,639,000,000	1,500,000,000	4,905,000,000	4,639,000,000
Income before income tax expense	602,000,000	611,000,000	1,764,000,000	1,837,000,000
Pre-tax margin	27.00%	29.00%	26.00%	28.00%
Total Average Assets	243,200,000,000	197,700,000,000	229,000,000,000	201,900,000,000
Investment Management
Segment Reporting Information [Line Items]
Servicing fees	0	0	0	0
Management fees	316,000,000	276,000,000	908,000,000	816,000,000
Trading services	12,000,000	14,000,000	35,000,000	55,000,000
Securities finance	0	0	0	0
Processing fees and other	(8,000,000)	5,000,000	(5,000,000)	10,000,000
Total fee revenue	320,000,000	295,000,000	938,000,000	881,000,000
Net interest revenue	19,000,000	19,000,000	52,000,000	63,000,000
Gains (losses) related to investment securities, net	0	0	0	0
Total revenue	339,000,000	314,000,000	990,000,000	944,000,000
Provision for loan losses	0	0	0	0
Total expenses	239,000,000	187,000,000	708,000,000	613,000,000
Income before income tax expense	100,000,000	127,000,000	282,000,000	331,000,000
Pre-tax margin	29.00%	40.00%	28.00%	35.00%
Total Average Assets	4,100,000,000	3,600,000,000	3,600,000,000	3,800,000,000
Other
Segment Reporting Information [Line Items]
Acquisition and restructuring costs	(20,000,000)		(81,000,000)
Provision for litigation exposure and other costs	(4,000,000)	5,000,000	2,000,000	20,000,000
Claims resolution		30,000,000		74,000,000
Servicing fees	0	0	0	0
Management fees	0	0	0	0
Trading services	0	0	0	0
Securities finance	0	0	0	0
Processing fees and other	0	0	0	0
Total fee revenue	0	0	0	0
Net interest revenue	0	0	0	0
Gains (losses) related to investment securities, net	0	0	0	0
Total revenue	0	0	0	0
Provision for loan losses	0	0	0	0
Total expenses	14,000,000	35,000,000	157,000,000	94,000,000
Income before income tax expense	$ (14,000,000)	$ (35,000,000)	$ (157,000,000)	$ (94,000,000)