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EARNINGS PER COMMON SHARE COMPUTATION (Tables)
 6 Months Ended
Jun. 30, 2025
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 three and six months ended June 30, 2025 and 2024:
Three months ended June 30,Six months ended June 30,
2025202420252024
(dollars in millions, except per common share results; number of shares in thousands)
Net income available for common stockholders$545 $679 $1,789 $1,420 
Weighted average outstanding shares of common stock
    used to compute basic earnings per common share		120,539 120,445 120,602 120,712 
Dilutive effect of:
Employee stock options— 1 — 4 
Restricted stock206 219 192 251 
Shares used to compute diluted earnings per common share120,745 120,665 120,794 120,967 
Basic earnings per common share$4.52 $5.63 $14.83 $11.76 
Diluted earnings per common share$4.51 $5.62 $14.81 $11.74 
Number of antidilutive stock options and restricted stock
    excluded from computation		791 751 1,299 958