Goodwill and Other Intangible Assets (Changes In The Carrying Amount Of Other Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 2,539	$ 2,459
Amortization	(53)	(51)
Foreign currency translation, net	(34)	35
Ending balance	2,452	2,443
Investment Servicing
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	2,492	2,408
Amortization	(51)	(49)
Foreign currency translation, net	(32)	34
Ending balance	2,409	2,393
Investment Management
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	47	51
Amortization	(2)	(2)
Foreign currency translation, net	(2)	1
Ending balance	$ 43	$ 50