Line of Business Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 line_of_business	Sep. 30, 2012
Segment Reporting Information [Line Items]
Number of lines of business			2
Acquisition and restructuring costs	$ 30,000,000	$ 28,000,000	$ 74,000,000	$ 86,000,000
Provision for litigation exposure and other costs	5,000,000	85,000,000	20,000,000	107,000,000
Credit related to recoveries associated with the 2008 Lehman Brothers bankruptcy	0	362,000,000	0	362,000,000
Servicing fees	1,211,000,000	1,100,000,000	3,587,000,000	3,264,000,000
Management fees	276,000,000	251,000,000	816,000,000	733,000,000
Trading services	256,000,000	232,000,000	833,000,000	767,000,000
Securities finance	74,000,000	91,000,000	283,000,000	331,000,000
Processing fees and other	66,000,000	45,000,000	192,000,000	187,000,000
Total fee revenue	1,883,000,000	1,719,000,000	5,711,000,000	5,282,000,000
Net interest revenue	546,000,000	619,000,000	1,718,000,000	1,916,000,000
Gains (losses) related to investment securities, net	(4,000,000)	18,000,000	(9,000,000)	2,000,000
Total revenue	2,425,000,000	2,356,000,000	7,420,000,000	7,200,000,000
Provision for loan losses	0	0	0	(1,000,000)
Total expenses	1,722,000,000	1,415,000,000	5,346,000,000	5,022,000,000
Income before income tax expense	703,000,000	941,000,000	2,074,000,000	2,179,000,000
Pre-tax margin	29.00%	40.00%	28.00%	30.00%
Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	201,300,000,000	195,800,000,000	201,300,000,000	195,800,000,000
Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	205,700,000,000	191,000,000,000	205,700,000,000	191,000,000,000
Investment Servicing
Segment Reporting Information [Line Items]
Servicing fees	1,211,000,000	1,100,000,000	3,587,000,000	3,264,000,000
Management fees	0	0	0	0
Trading services	242,000,000	208,000,000	778,000,000	695,000,000
Securities finance	69,000,000	81,000,000	255,000,000	296,000,000
Processing fees and other	60,000,000	38,000,000	181,000,000	183,000,000
Total fee revenue	1,582,000,000	1,427,000,000	4,801,000,000	4,438,000,000
Net interest revenue	527,000,000	600,000,000	1,655,000,000	1,858,000,000
Gains (losses) related to investment securities, net	(4,000,000)	18,000,000	(9,000,000)	48,000,000
Total revenue	2,105,000,000	2,045,000,000	6,447,000,000	6,344,000,000
Provision for loan losses			0	(1,000,000)
Total expenses	1,496,000,000	1,459,000,000	4,628,000,000	4,537,000,000
Income before income tax expense	609,000,000	586,000,000	1,819,000,000	1,808,000,000
Pre-tax margin	29.00%	29.00%	28.00%	28.00%
Investment Servicing | Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	197,700,000,000	192,100,000,000	197,700,000,000	192,100,000,000
Investment Servicing | Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	201,900,000,000	187,200,000,000	201,900,000,000	187,200,000,000
Investment Management
Segment Reporting Information [Line Items]
Servicing fees	0	0	0	0
Management fees	276,000,000	251,000,000	816,000,000	733,000,000
Trading services	14,000,000	24,000,000	55,000,000	72,000,000
Securities finance	5,000,000	10,000,000	28,000,000	35,000,000
Processing fees and other	6,000,000	7,000,000	11,000,000	4,000,000
Total fee revenue	301,000,000	292,000,000	910,000,000	844,000,000
Net interest revenue	19,000,000	19,000,000	63,000,000	58,000,000
Gains (losses) related to investment securities, net	0	0	0	0
Total revenue	320,000,000	311,000,000	973,000,000	902,000,000
Provision for loan losses			0	0
Total expenses	191,000,000	205,000,000	624,000,000	654,000,000
Income before income tax expense	129,000,000	106,000,000	349,000,000	248,000,000
Pre-tax margin	40.00%	34.00%	36.00%	27.00%
Investment Management | Quarter To Date [Member]
Segment Reporting Information [Line Items]
Average assets	3,600,000,000	3,700,000,000	3,600,000,000	3,700,000,000
Investment Management | Year To Date [Member]
Segment Reporting Information [Line Items]
Average assets	3,800,000,000	3,800,000,000	3,800,000,000	3,800,000,000
Other
Segment Reporting Information [Line Items]
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
Gains (losses) related to investment securities, net	0	0	0	(46,000,000)
Total revenue	0	0	0	(46,000,000)
Provision for loan losses			0	0
Total expenses	35,000,000	(249,000,000)	94,000,000	(169,000,000)
Income before income tax expense	$ (35,000,000)	$ 249,000,000	$ (94,000,000)	$ 123,000,000