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Net (Loss) Income per Share | 12 Months Ended
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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.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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