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Net (Loss) Income per Share
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Net (Loss) Income per Share
Net (Loss) Income per Share
The following table sets forth the calculation of basic and diluted net (loss) income per share:
 
December 31,
 
2017
 
2016
 
2015
 
(In millions, except net (loss) income per share)
Numerator:
 
 
 
 
 
Net (loss) income
$
(512
)
 
$
52

 
$
143

Denominator:
 
 
 
 
 
Shares outstanding at the beginning of the period
56

 
55

 
49

Weighted-average number of shares issued:
 
 
 
 
 
Common stock offering
—

 
—

 
3

Denominator for basic net (loss) income per share
56

 
55

 
52

Effect of dilutive securities:
 
 
 
 
 
Share-based compensation
—

 
—

 
1

Convertible senior notes (1)
—

 
—

 
1

1.125% Warrants (1)
—

 
1

 
2

Denominator for diluted net (loss) income per share
56

 
56

 
56

 
 
 
 
 
 
Net (loss) income per share: (2)
 
 
 
 
 
Basic
$
(9.07
)
 
$
0.93

 
$
2.75

Diluted
$
(9.07
)
 
$
0.92

 
$
2.58

 
 
 
 
 
 
Potentially dilutive common shares excluded from calculations: (1)
 
 
 
 
 
1.125% Warrants
2

 
—

 
—

1.625% Notes
1

 
—

 
—

_______________________________ 
(1)
For more information regarding the convertible senior notes, refer to Note 11, “Debt.” For more information regarding the 1.125% Warrants, refer to Note 14, “Stockholders' Equity.” The dilutive effect of all potentially dilutive common shares is calculated using the treasury stock method. Potentially dilutive common shares were not included in the computation of diluted net loss per share for the year ended December 31, 2017, because to do so would have been anti-dilutive.
(2)
Source data for calculations in thousands.