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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
Earnings per share    
Income (loss) from continuing operations $ 108.5 $ 109.9
Gain (loss) on disposition of discontinued operations – net of tax 0.0 2.7
Net income (loss) $ 108.5 $ 112.6
Basic shares:    
Weighted average shares outstanding - basic (in shares) 67.0 67.7
Earnings (loss) per share – basic:    
Income (loss) from continuing operations (in dollars per share) $ 1.62 $ 1.62
Gain (loss) on disposition of discontinued operations - net of tax (in dollars per share) 0 0.04
Net income (loss) (in dollars per share) $ 1.62 $ 1.66
Diluted shares:    
Weighted average shares outstanding - basic (in shares) 67.0 67.7
Effect of dilutive securities:    
Restricted stock (in shares) 0.9 1.1
Diluted weighted average shares outstanding (in shares) 67.9 68.8
Earnings (loss) per share – diluted:    
Income (loss) from continuing operations (in dollars per share) $ 1.60 $ 1.60
Gain (loss) on disposition of discontinued operations - net of tax (in dollars per share) 0 0.04
Net income (loss) (in dollars per share) $ 1.60 $ 1.64
Restricted Stock    
Earnings (loss) per share – diluted:    
Antidilutive securities excluded from computation of earnings per share (in shares) 0.3 0.1