Goodwill And Other Intangible Assets (Changes In The Carrying Amount Of Other Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Goodwill [Line Items]
Beginning balance			$ 2,459	$ 2,593
Acquisitions			0	28
Amortization	(46)	(50)	(145)	(149)
Foreign currency translation, net			(3)	12
Other	0	2	0	2
Ending balance	2,311	2,486	2,311	2,486
Investment Servicing [Member]
Goodwill [Line Items]
Beginning balance			2,408	2,559
Acquisitions			0	0
Amortization			(143)	(142)
Foreign currency translation, net			(3)	14
Other	0	0	0	0
Ending balance	2,262	2,431	2,262	2,431
Investment Management [Member]
Goodwill [Line Items]
Beginning balance			51	34
Acquisitions			0	28
Amortization			(2)	(7)
Foreign currency translation, net			0	(2)
Other	0	2	0	2
Ending balance	$ 49	$ 55	$ 49	$ 55