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Net Income per Share | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Net Income per Share | Net Income per Share The following table sets forth the calculation of basic and diluted net income per share:
| Three Months Ended March 31,
| 2019 |  | 2018
| (In millions, except net income per share)
Numerator: |  |  |
Net income | $ | 198 |  |  | $ | 107 |
Denominator: |  |  |
Shares outstanding at the beginning of the period | 62.1 |  |  | 59.3 |
Weighted-average number of shares issued: |  |  |
Exchange of 1.625% Convertible Notes | — |  |  | 0.5 |
Denominator for basic net income per share | 62.1 |  |  | 59.8 |
Effect of dilutive securities: |  |  |
1.125% Warrants (1) | 3.5 |  |  | 4.4 |
1.625% Convertible Notes | — |  |  | 0.7 |
Stock-based compensation | 0.6 |  |  | 0.3 |
Denominator for diluted net income per share | 66.2 |  |  | 65.2 |
Net income per share: (2) |  |  |
Basic | $ | 3.19 |  |  | $ | 1.79 |
Diluted | $ | 2.99 |  |  | $ | 1.64 |
Potentially dilutive common shares excluded from calculations: (1) |  |  |
Stock-based compensation | 0.1 |  |  | 0.4 |
______________________________
(1) | For more information and definitions regarding the 1.125% Warrants, including partial termination transactions, refer to Note 9, “Stockholders' Equity.” The dilutive effect of all potentially dilutive common shares is calculated using the treasury stock method. Certain potentially dilutive common shares issuable were not included in the computation of diluted net income per share 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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