Goodwill and Other Intangible Assets - Changes In The Carrying Amount Of Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 1,768	$ 2,025
Acquisitions	217	16
Divestitures	(8)	0
Amortization	(207)	(197)	$ (222)
Foreign currency translation and other, net	(20)	(76)
Ending balance	1,750	1,768	2,025
Investment Servicing
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	1,753	1,998
Acquisitions	0	16
Divestitures	(8)	0
Amortization	(186)	(187)
Foreign currency translation and other, net	(20)	(74)
Ending balance	1,539	1,753	1,998
Investment Management
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	15	27
Acquisitions	217	0
Divestitures	0	0
Amortization	(21)	(10)
Foreign currency translation and other, net	0	(2)
Ending balance	$ 211	$ 15	$ 27