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Net Income per Share (Tables) | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Summary of Denominators for the Computation of Basic and Diluted Net Income (Loss) Per Share | The following table sets forth the calculation of net income per share:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (In millions, except net income per share)
Numerator: |  |  |  |  |  |  |
Net income | $ | 175 |  |  | $ | 197 |  |  | $ | 569 |  |  | $ | 506 |
Denominator: |  |  |  |  |  |  |
Shares outstanding at the beginning of the period | 62.2 |  |  | 61.3 |  |  | 62.1 |  |  | 59.3 |
Weighted-average number of shares issued: |  |  |  |  |  |  |
Exchange of 1.625% Convertible Notes | — |  |  | — |  |  | — |  |  | 1.3 |
Stock-based compensation | — |  |  | — |  |  | 0.1 |  |  | 0.2 |
Denominator for net income per share, basic | 62.2 |  |  | 61.3 |  |  | 62.2 |  |  | 60.8 |
Effect of dilutive securities: |  |  |  |  |  |  |
1.125% Warrants (1) | 0.8 |  |  | 5.6 |  |  | 1.8 |  |  | 5.0 |
1.625% Convertible Notes | — |  |  | 0.6 |  |  | — |  |  | 0.5 |
Stock-based compensation | 0.6 |  |  | 0.4 |  |  | 0.6 |  |  | 0.3 |
Denominator for net income per share, diluted | 63.6 |  |  | 67.9 |  |  | 64.6 |  |  | 66.6 |
Net income per share: (2) |  |  |  |  |  |  |
Basic | $ | 2.81 |  |  | $ | 3.22 |  |  | $ | 9.15 |  |  | $ | 8.32 |
Diluted | $ | 2.75 |  |  | $ | 2.90 |  |  | $ | 8.80 |  |  | $ | 7.60 |
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(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.
(2) Source data for calculations in thousands.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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