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v3.10.0.1

Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Numerator: |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ 197 | $ 202 | $ 107 | $ (97) | $ (230) | $ 77 | $ 506 | $ (250) |  |
Denominator: |  |  |  |  |  |  |  |  |  |
Shares outstanding at the beginning of the period (in shares) |  | 61.3 |  |  | 56.5 |  |  |  | 59.3 | 55.8
Exchange of 1.625% Notes (in shares) | 0.0 |  |  | 0.0 |  |  | 1.3 | 0.0 |  |
Stock-based compensation (in shares) | 0.0 |  |  | 0.0 |  |  | 0.2 | 0.4 |  |
Denominator for basic net income per share (in shares) | 61.3 |  |  | 56.5 |  |  | 60.8 | 56.2 |  |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |
1.125% Warrants (in shares) | 5.6 |  |  | 0.0 |  |  | 5.0 | 0.0 |  |
1.625% Notes (in shares) | 0.6 |  |  | 0.0 |  |  | 0.5 | 0.0 |  |
Stock-based compensation (in shares) | 0.4 |  |  | 0.0 |  |  | 0.3 | 0.0 |  |
Denominator for diluted net income per share (in shares) | 67.9 |  |  | 56.5 |  |  | 66.6 | 56.2 |  |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 3.22 |  |  | $ (1.70) |  |  | $ 8.32 | $ (4.44) |  |
Diluted (in dollars per share) | $ 2.90 |  |  | $ (1.70) |  |  | $ 7.60 | $ (4.44) |  |
Potentially dilutive common shares excluded from calculations: |  |  |  |  |  |  |  |  |  |
Stock-based compensation (in shares) | 0.0 |  |  | 0.2 |  |  | 0.0 | 0.3 |  |
Cash Convertible Senior Notes Due 2020, Warrants |  |  |  |  |  |  |  |  |  |
Potentially dilutive common shares excluded from calculations: |  |  |  |  |  |  |  |  |  |
Stated percentage of warrants | 1.125% |  |  |  |  |  | 1.125% |  |  |
1.125% Warrants |  |  |  |  |  |  |  |  |  |
Potentially dilutive common shares excluded from calculations: |  |  |  |  |  |  |  |  |  |
Potentially dilutive common shares excluded from calculations (in shares) | 0.0 |  |  | 2.3 |  |  | 0.0 | 1.3 |  |
1.625% Notes |  |  |  |  |  |  |  |  |  |
Potentially dilutive common shares excluded from calculations: |  |  |  |  |  |  |  |  |  |
Potentially dilutive common shares excluded from calculations (in shares) | 0.0 |  |  | 0.6 |  |  | 0.0 | 0.3 |  |
Convertible Notes | 1.625% Notes |  |  |  |  |  |  |  |  |  |
Potentially dilutive common shares excluded from calculations: |  |  |  |  |  |  |  |  |  |
Percentage of contractual interest rate | 1.625% |  |  |  |  |  | 1.625% |  |  |

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