Goodwill And Other Intangible Assets (Changes In The Carrying Amount Of Other Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill [Line Items]
Beginning balance	$ 2,593	$ 1,810
Acquisitions	96	969
Amortization	(200)	(179)	(136)
Foreign currency translation, net	(30)	(7)
Ending balance	2,459	2,593	1,810
Investment Servicing [Member]
Goodwill [Line Items]
Beginning balance	2,559	1,760
Acquisitions	67	969
Amortization	(189)	(170)
Foreign currency translation, net	(29)	(6)
Other		6
Ending balance	2,408	2,559
Investment Management [Member]
Goodwill [Line Items]
Beginning balance	34	50
Acquisitions	29
Amortization	(11)	(9)
Foreign currency translation, net	(1)	(1)
Other		(6)
Ending balance	$ 51	$ 34