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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Earnings per share      
Income (loss) from continuing operations $ 47.6 $ (60.3)  
Gain (loss) on disposition of discontinued operations – net of tax 2.7 55.7  
Net income (loss) $ 50.3 $ (4.6)  
Basic shares:      
Weighted average shares outstanding - basic (in shares) 79,700,000 105,200,000  
Earnings (loss) per share – basic:      
Income (loss) from continuing operations (in dollars per share) $ 0.60 $ (0.57)  
Gain (loss) on disposition of discontinued operations - net of tax (in dollars per share) 0.03 0.53  
Net income (loss) $ 0.63 $ (0.04)  
Diluted shares:      
Weighted average shares outstanding - basic (in shares) 79,700,000 105,200,000  
Effect of dilutive securities:      
Stock options and restricted stock awards [in shares] 2,000,000 0  
Diluted weighted average shares outstanding (in shares) 81,700,000 105,200,000  
Earnings (loss) per share – diluted:      
Income (loss) from continuing operations (in dollars per share) $ 0.59 $ (0.57)  
Gain (loss) on disposition of discontinued operations - net of tax (in dollars per share) 0.03 0.53  
Net income (loss) 0.62 (0.04)  
Other details of antidilutive securities      
Common stock, par value (in dollars per share) $ 0.01 $ 0.01 $ 0.01
Stock Options      
Other details of antidilutive securities      
Antidilutive securities excluded from computation of earnings per share (in shares) 60 8,000  
Restricted Stock      
Other details of antidilutive securities      
Antidilutive securities excluded from computation of earnings per share (in shares) 125,200 2,288,000