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EARNINGS PER COMMON SHARE COMPUTATION (Tables)
 6 Months Ended
Jun. 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 six months ended June 30, 2024 and 2023:
Three months ended June 30,Six Months Ended June 30,
2024202320242023
(dollars in millions, except per common share results; number of shares in thousands)
Net income available for common stockholders$679 $959 $1,420 $2,198 
Weighted average outstanding shares of common stock
    used to compute basic earnings per common share		120,445 124,574 120,712 124,790 
Dilutive effect of:
Employee stock options1 34 4 34 
Restricted stock219 501 251 512 
Shares used to compute diluted earnings per common share120,665 125,109 120,967 125,336 
Basic earnings per common share$5.63 $7.70 $11.76 $17.62 
Diluted earnings per common share$5.62 $7.66 $11.74 $17.54 
Number of antidilutive stock options and restricted stock
    excluded from computation		751 78 958 308