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EARNINGS PER SHARE (Tables)
 12 Months Ended
Dec. 31, 2024
Earnings Per Share [Abstract]  
Calculation of earnings per share
The following table sets forth the calculation of EPS on total net income for the years ended December 31, 2024, 2023 and 2022 (in millions, except share and per share data):
 Years Ended December 31,
 202420232022
Weighted average basic common shares outstanding13,192,518 13,681,660 15,441,292 
Dilutive effect of stock-based awards and employee stock purchases57,366 53,139 52,324 
Weighted average dilutive common shares outstanding13,249,884 13,734,799 15,493,616 
Basic:
Net income$498.1 $601.6 $751.5 
Less: Earnings allocated to participating securities from continuing operations10.5 14.8 21.3 
Less: Earnings (loss) allocated to participating securities from discontinued operations— — (0.1)
Net income available to basic common shares$487.6 $586.8 $730.3 
Basic earnings per common share$36.96 $42.89 $47.29 
Diluted:
Net income$498.1 $601.6 $751.5 
Less: Earnings allocated to participating securities from continuing operations10.4 14.8 21.3 
Less: Earnings (loss) allocated to participating securities from discontinued operations— — (0.1)
Net income available to diluted common shares$487.7 $586.9 $730.3 
Diluted earnings per common share$36.81 $42.73 $47.14