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EARNINGS PER SHARE (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Basic and Diluted Earnings Per Share Table
 
Years ended December 31,
 
2019
 
2018
 
2017
Computation of (Loss) Income per Share
(In millions, except per share data)
Net (loss) income
$
(11.3
)
 
$
327.9

 
$
549.5

Basic shares
162.3

 
166.8

 
166.2

Basic net (loss) income per share
$
(0.07
)
 
$
1.97

 
$
3.31

Diluted shares:
 
 
 
 
 
Basic shares
162.3

 
166.8

 
166.2

Stock-based compensation
—

 
1.6

 
2.3

Diluted shares
162.3

 
168.4

 
168.5

Diluted net (loss) income per share
$
(0.07
)
 
$
1.95

 
$
3.26