Line of Business Information (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014 line_of_business	Jun. 30, 2013
Segment Reporting Information [Line Items]
Number of lines of business				2
Severance costs	$ 4,000,000	$ 72,000,000		$ 76,000,000
Acquisition and restructuring costs	(28,000,000)		(30,000,000)	(61,000,000)	(44,000,000)
Servicing fees	1,288,000,000		1,201,000,000	2,526,000,000	2,376,000,000
Management fees	300,000,000		277,000,000	592,000,000	540,000,000
Trading services	260,000,000		304,000,000	513,000,000	593,000,000
Securities finance	147,000,000		131,000,000	232,000,000	209,000,000
Processing fees and other	44,000,000		58,000,000	100,000,000	110,000,000
Total fee revenue	2,039,000,000		1,971,000,000	3,963,000,000	3,828,000,000
Net interest revenue	561,000,000		596,000,000	1,116,000,000	1,172,000,000
Gains (losses) related to investment securities, net	(2,000,000)		(7,000,000)	4,000,000	(5,000,000)
Total revenue	2,598,000,000		2,560,000,000	5,083,000,000	4,995,000,000
Provision for loan losses	2,000,000		0	4,000,000	0
Total expenses	1,850,000,000		1,798,000,000	3,878,000,000	3,624,000,000
Income before income tax expense	746,000,000		762,000,000	1,201,000,000	1,371,000,000
Pre-tax margin	29.00%		30.00%	24.00%	27.00%
Total Average Assets	234,700,000,000		207,700,000,000	225,200,000,000	208,000,000,000
Investment Servicing
Segment Reporting Information [Line Items]
Servicing fees	1,288,000,000		1,201,000,000	2,526,000,000	2,376,000,000
Management fees	0		0	0	0
Trading services	249,000,000		287,000,000	490,000,000	552,000,000
Securities finance	147,000,000		131,000,000	232,000,000	209,000,000
Processing fees and other	42,000,000		58,000,000	97,000,000	105,000,000
Total fee revenue	1,726,000,000		1,677,000,000	3,345,000,000	3,242,000,000
Net interest revenue	545,000,000		571,000,000	1,083,000,000	1,128,000,000
Gains (losses) related to investment securities, net	(2,000,000)		(7,000,000)	4,000,000	(5,000,000)
Total revenue	2,269,000,000		2,241,000,000	4,432,000,000	4,365,000,000
Provision for loan losses	2,000,000		0	4,000,000	0
Total expenses	1,593,000,000		1,549,000,000	3,266,000,000	3,139,000,000
Income before income tax expense	674,000,000		692,000,000	1,162,000,000	1,226,000,000
Pre-tax margin	30.00%		31.00%	26.00%	28.00%
Total Average Assets	231,300,000,000		203,600,000,000	221,800,000,000	204,000,000,000
Investment Management
Segment Reporting Information [Line Items]
Servicing fees	0		0	0	0
Management fees	300,000,000		277,000,000	592,000,000	540,000,000
Trading services	11,000,000		17,000,000	23,000,000	41,000,000
Securities finance	0		0	0	0
Processing fees and other	2,000,000		0	3,000,000	5,000,000
Total fee revenue	313,000,000		294,000,000	618,000,000	586,000,000
Net interest revenue	16,000,000		25,000,000	33,000,000	44,000,000
Gains (losses) related to investment securities, net	0		0	0	0
Total revenue	329,000,000		319,000,000	651,000,000	630,000,000
Provision for loan losses	0		0	0	0
Total expenses	225,000,000		204,000,000	469,000,000	426,000,000
Income before income tax expense	104,000,000		115,000,000	182,000,000	204,000,000
Pre-tax margin	32.00%		36.00%	28.00%	32.00%
Total Average Assets	3,400,000,000		4,100,000,000	3,400,000,000	4,000,000,000
Other
Segment Reporting Information [Line Items]
Acquisition and restructuring costs	(28,000,000)			(61,000,000)
Provision for litigation exposure and other costs			15,000,000	6,000,000	15,000,000
Claims resolution			30,000,000		44,000,000
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	32,000,000		45,000,000	143,000,000	59,000,000
Income before income tax expense	$ (32,000,000)		$ (45,000,000)	$ (143,000,000)	$ (59,000,000)