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Net Income per Share | 3 Months Ended
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Mar. 31, 2018
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,
| 2018 |  | 2017
| (In millions, except net income per share)
Numerator: |  |  |
Net income | $ | 107 |  |  | $ | 77 |
Denominator: |  |  |
Shares outstanding at the beginning of the period | 59 |  |  | 56 |
Weighted-average number of shares issued: |  |  |
1.625% Exchange (1) | 1 |  |  | — |
Denominator for basic net income per share | 60 |  |  | 56 |
Effect of dilutive securities: |  |  |
Convertible senior notes (1) | 1 |  |  | — |
1.125% Warrants (1) | 4 |  |  | — |
Denominator for diluted net income per share | 65 |  |  | 56 |
Net income per share: (2) |  |  |
Basic | $ | 1.79 |  |  | $ | 1.38 |
Diluted | $ | 1.64 |  |  | $ | 1.37 |
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(1) | For more information regarding the 1.625% Exchange and the convertible senior notes, refer to Note 7, “Debt.” For more information regarding the 1.125% Warrants, refer to Note 9, “Stockholders' Equity.” The dilutive effect of all potentially dilutive common shares is calculated using the treasury stock method.
(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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