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	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,603	$ 3,304
Accumulated Amortization	(1,064)	(845)
Net Carrying Amount	2,539	2,459	2,593
Client relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,653	2,369
Accumulated Amortization	(755)	(641)
Net Carrying Amount	1,898	1,728
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	706	702
Accumulated Amortization	(192)	(117)
Net Carrying Amount	514	585
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	244	233
Accumulated Amortization	(117)	(87)
Net Carrying Amount	$ 127	$ 146