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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Earnings per share        
Income (loss) from continuing operations $ 22.0 $ 52.4 $ (5.9) $ 191.2
Income (loss) from discontinued operations – net of tax (0.1) (10.1) (1.3) (151.8)
Gain (loss) on disposition of discontinued operations – net of tax (16.1) (20.9) (21.1) (9.5)
Net income (loss) $ 5.8 $ 21.4 $ (28.3) $ 29.9
Basic shares:        
Weighted average shares outstanding - basic (in shares) 69.3 71.3 69.7 71.0
Earnings (loss) per share – basic:        
Income (loss) from continuing operations $ 0.31 $ 0.73 $ (0.09) $ 2.69
Income (loss) from discontinued operations – net of tax 0 (0.14) (0.02) (2.14)
Gain (loss) on disposition of discontinued operations – net of tax (0.23) (0.29) (0.30) (0.13)
Net income (loss) $ 0.08 $ 0.30 $ (0.41) $ 0.42
Diluted shares:        
Weighted average shares outstanding - basic (in shares) 69.3 71.3 69.7 71.0
Effect of dilutive securities:        
Stock options and restricted stock awards [in shares] 0.2 0.5 0.0 0.8
Diluted weighted average shares outstanding (in shares) 69.5 71.8 69.7 71.8
Earnings (loss) per share – diluted:        
Income (loss) from continuing operations $ 0.31 $ 0.73 $ (0.09) $ 2.66
Income (loss) from discontinued operations – net of tax 0 (0.14) (0.02) (2.11)
Gain (loss) on disposition of discontinued operations – net of tax (0.23) (0.29) (0.30) (0.13)
Net income (loss) $ 0.08 $ 0.30 $ (0.41) $ 0.42
Restricted Stock        
Other details of antidilutive securities        
Antidilutive securities excluded from computation of earnings per share (in shares) 0.9 1.3 2.0 1.1