Goodwill and Other Intangible Assets - Changes In The Carrying Amount Of Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 2,025	$ 2,360
Amortization	(50)	(54)
Foreign currency translation and other, net	(83)	0
Ending balance	1,892	2,306
Investment Servicing
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	1,998	2,321
Amortization	(48)	(52)
Foreign currency translation and other, net	(81)	0
Ending balance	1,869	2,269
Investment Management
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	27	39
Amortization	(2)	(2)
Foreign currency translation and other, net	(2)	0
Ending balance	$ 23	$ 37