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COMMITMENTS AND CONTINGENT LIABILITIES (Tables)
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Contract amounts of various commitments to extend credit The contract amounts of these financial agreements at December 31, 2021, and December 31, 2020 were as follows: 
 At December 31,
(dollar amounts in millions)20212020
Contract amount representing credit risk
Commitments to extend credit:
Commercial$27,933 $20,701 
Consumer18,513 14,808 
Commercial real estate3,042 1,313 
Standby letters of credit and guarantees on industrial revenue bonds694 581 
Commercial letters of credit36 21