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Changes in the Net Carrying Amount of Goodwill by Reporting Unit (Detail)
9 Months Ended
Sep. 30, 2011
Schedule of Goodwill [Table Text Block]

Changes in the net carrying amount of goodwill, by reporting unit, for the nine months ended September 30, 2011 and 2010 were as follows:

  CommercialBranchConsumerInvestment 
($ in millions) BankingBankingLendingAdvisorsTotal
Net carrying value as of December 31, 2010:$6131,656 - 1482,417
Acquisition activity -- - - -
Net carrying value as of September 30, 2011:$6131,656 - 1482,417
       
Net carrying value as of December 31, 2009:$6131,656 - 1482,417
Acquisition activity 00 - - 0
Net carrying value as of September 30, 2010:$6131,656 - 1482,417

 Discount Rate
Commercial Banking16.9%
Branch Banking15.9%
Investment Advisors18.7%