Goodwill and Other Intangible Assets - Changes In The Carrying Amount Of Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 1,768	$ 2,025
Amortization	(49)	(50)
Foreign currency translation and other, net	30	(83)
Ending balance	1,749	1,892
Investment Servicing
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	1,753	1,998
Amortization	(47)	(48)
Foreign currency translation and other, net	29	(81)
Ending balance	1,735	1,869
Investment Management
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	15	27
Amortization	(2)	(2)
Foreign currency translation and other, net	1	(2)
Ending balance	$ 14	$ 23