Goodwill and Other Intangible Assets - Changes In The Carrying Amount Of Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Finite-lived Intangible Assets [Roll Forward]
Beginning balance			$ 1,768	$ 2,025
Amortization	$ (49)	$ (49)	(98)	(99)
Foreign currency translation and other, net			12	(55)
Ending balance	1,682	1,871	1,682	1,871
Investment Servicing
Finite-lived Intangible Assets [Roll Forward]
Beginning balance			1,753	1,998
Amortization			(94)	(95)
Foreign currency translation and other, net			12	(54)
Ending balance	1,671	1,849	1,671	1,849
Investment Management
Finite-lived Intangible Assets [Roll Forward]
Beginning balance			15	27
Amortization			(4)	(4)
Foreign currency translation and other, net			0	(1)
Ending balance	$ 11	$ 22	$ 11	$ 22