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EARNINGS PER COMMON SHARE COMPUTATION (Tables)
 3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Details Supporting Computation of Earnings Per Share
Detail supporting the computation of basic and diluted earnings per common share was as follows for the three months ended March 31, 2023 and 2022:
Three months ended March 31,
20232022
(dollars in millions, except per common share results; number of shares in thousands)
Net income available for common stockholders$1,239 $930 
Weighted average outstanding shares of common stock
    used to compute basic earnings per common share		125,005 126,938 
Dilutive effect of:
Employee stock options34 40 
Restricted stock525 496 
Shares used to compute diluted earnings per common share125,564 127,474 
Basic earnings per common share$9.91 $7.32 
Diluted earnings per common share$9.87 $7.29 
Number of antidilutive stock options and restricted stock
    excluded from computation		538 626