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Commitments, Contingencies and Guarantees (Tables)
6 Months Ended
Jun. 30, 2012
Commitments, Contingencies and Guarantees [Abstract]  
Summary of commitments
         

(Dollars in millions)

  June 30, 2012  

Commitments to extend credit

  $ 27,410  

Standby & commercial letters of credit

    5,836  

Other commitments

    582