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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Basic and Diluted earnings per share numerator:    
Net income $ 209.5 $ 173.4
Net income allocated to participating securities (1.2) (0.8)
Net income allocated to common stockholders $ 208.3 $ 172.6
Basic earnings per share denominator:    
Weighted average shares outstanding (in shares) 105.6 105.9
Basic earnings per share (in dollars per share) $ 1.97 $ 1.63
Diluted earnings per share denominator:    
Weighted average shares outstanding (in shares) 105.6 105.9
Dilutive common shares issued under stock program (in shares) 0.5 0.3
Total dilutive weighted average shares (in shares) 106.1 106.2
Diluted earnings per share (in dollars per share) $ 1.96 $ 1.63