Goodwill And Other Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Goodwill [Roll Forward]
Beginning balance	$ 5,645		$ 5,597
Acquisitions(1)	290	[1]	100	[1]
Foreign currency translation, net	42		(52)
Ending balance	5,977		5,645
Investment Servicing
Goodwill [Roll Forward]
Beginning balance	5,610		5,591
Acquisitions(1)	290	[1]	68	[1]
Foreign currency translation, net	41		(49)
Ending balance	5,941		5,610
Investment Management
Goodwill [Roll Forward]
Beginning balance	35		6
Acquisitions(1)	0	[1]	32	[1]
Foreign currency translation, net	1		(3)
Ending balance	$ 36		$ 35

[1] Amount for 2012 represented the acquisition of GSAS, more fully discussed in note 2. Amounts for 2011 represented acquisitions of Complementa, Pulse Trading and BIAM.