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EARNINGS PER COMMON SHARE COMPUTATION (Tables)
 9 Months Ended
Sep. 30, 2024
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 and nine months ended September 30, 2024 and 2023:
Three months ended September 30,Nine months ended September 30,
2024202320242023
(dollars in millions, except per common share results; number of shares in thousands)
Net income available for common stockholders$480 $832 $1,900 $3,030 
Weighted average outstanding shares of common stock
    used to compute basic earnings per common share		120,405 123,426 120,609 124,335 
Dilutive effect of:
Employee stock options3 26 4 31 
Restricted stock356 531 286 519 
Shares used to compute diluted earnings per common share120,764 123,983 120,899 124,885 
Basic earnings per common share$3.99 $6.74 $15.76 $24.37 
Diluted earnings per common share$3.98 $6.71 $15.72 $24.26 
Number of antidilutive stock options and restricted stock
    excluded from computation		361 137 759 251