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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Basic and Diluted earnings per share numerator:      
Net income $ 761.4 $ 235.0 $ 529.0
Net income allocated to participating securities (3.9) (0.9) (1.7)
Net income allocated to common stockholders $ 757.5 $ 234.1 $ 527.3
Basic earnings per share denominator:      
Weighted average shares outstanding (in shares) 105.8 106.3 107.0
Basic earnings per share (in dollars per share) $ 7.16 $ 2.20 $ 4.93
Diluted earnings per share denominator:      
Weighted average shares outstanding (in shares) 105.8 106.3 107.0
Dilutive common shares issued under stock program (in shares) 0.4 0.4 0.2
Total dilutive weighted average shares (in shares) 106.2 106.7 107.2
Diluted earnings per share (in dollars per share) $ 7.13 $ 2.19 $ 4.92