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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
In Billions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Undisbursed Loan Commitments
   
Credit Extensions    
Loan $ 2.32 $ 2.19
Commercial and Standby Letters of Credit
   
Credit Extensions    
Commercial and standby letters of credit issued $ 1.97 $ 1.64