Goodwill and Other Intangible Assets (Gross Carrying Amount, Accumulated Amortization And Net Carrying Amount Of Other Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,649	$ 3,657
Accumulated Amortization	(1,343)	(1,297)
Net Carrying Amount	2,306	2,360	2,452	2,539
Client relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,702	2,706
Accumulated Amortization	(1,011)	(975)
Net Carrying Amount	1,691	1,731
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	717	717
Accumulated Amortization	(200)	(191)
Net Carrying Amount	517	526
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	230	234
Accumulated Amortization	(132)	(131)
Net Carrying Amount	$ 98	$ 103