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EARNINGS PER COMMON SHARE COMPUTATION (Tables)
 12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Computation of Basic and Diluted Earnings Per Common Share
Detail supporting the computation of basic and diluted earnings per common share was as follows for the years ended December 31, 2023, 2022 and 2021:
202320222021
 (dollars in millions, except per
common share results, number of
shares/options in thousands)
Net income available for common stockholders$2,489 $2,806 $2,933 
Weighted-average outstanding shares of common stock used to
    compute basic earnings per common share		123,866 126,419 128,688 
Dilutive effect of:
Employee stock options32 50 64 
Restricted stock543 625 644 
Shares used to compute diluted earnings per common share124,441 127,094 129,396 
Basic earnings per common share$20.09 $22.20 $22.79 
Diluted earnings per common share$20.00 $22.08 $22.67 
Number of antidilutive stock options and restricted stock awards
    excluded from computation		207 205 216