v2.4.0.6
Goodwill (Schedule Of Goodwill By Segment) (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Indefinite-lived Intangible Assets by Segment [Line Items]    
Goodwill $ 4,816 $ 4,816
Banking/Treasury [Member]
   
Indefinite-lived Intangible Assets by Segment [Line Items]    
Goodwill 4,691 4,691
Insurance [Member]
   
Indefinite-lived Intangible Assets by Segment [Line Items]    
Goodwill $ 125 $ 125