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EARNINGS PER SHARE (Tables)
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Reconciliation of Earnings and Number of Shares Used in Calculation of Basic and Diluted Earnings Per Share
The table below illustrates the reconciliation of the earnings and number of shares used in our calculation of basic and diluted earnings per share attributable to common shareholders.
 
Three Months Ended
 
Nine Months Ended
(in millions, except per share amounts)
September 30, 2019
 
September 30, 2018
 
September 30, 2019(1)
 
September 30, 2018(1)
Computation of Basic Earnings Per Share Attributable to Common Shareholders
 
 
 
 
Net (loss) income attributable to common shareholders
$
(9
)
 
$
(36
)
 
$
64

 
$
11

Shares for basic earnings per share
43.4

 
32.8

 
44.5

 
28.8

Basic (loss) earnings per share
$
(0.21
)
 
$
(1.08
)
 
$
1.44

 
$
0.39

Computation of Diluted Earnings Per Share Attributable to Common Shareholders
 
 
 
 
Net (loss) income attributable to common shareholders
$
(9
)
 
$
(36
)
 
$
64

 
$
11

Shares for basic earnings per share
43.4

 
32.8

 
44.5

 
28.8

Effect of dilutive shares outstanding
 
 
 
 
 
 
 
Employee stock options and SARs
—

 
—

 
0.3

 
0.4

Restricted stock units
—

 
—

 
0.3

 
0.2

Shares for diluted earnings per share
43.4

 
32.8

 
45.1

 
29.4

Diluted (loss) earnings per share
$
(0.21
)
 
$
(1.08
)
 
$
1.43

 
$
0.38

_______________________________
(1) 
The computations of diluted earnings per share attributable to common shareholders exclude approximately 401,000 and 269,000 shares of common stock, the maximum number of shares issuable as of September 30, 2019 and September 30, 2018, respectively, upon the vesting of certain performance-based awards, because the performance conditions required to be met for the shares subject to such awards to vest were not achieved by the end of the reporting period.