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v3.10.0.1

Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Retained Earnings
--- | --- | --- | --- | --- | ---
Beginning Balance, shares at Dec. 31, 2015 | 55.1 | 56.0 |  |  |
Beginning Balance at Dec. 31, 2015 | $ 1,557 | $ 0 | $ 803 | $ (4) | $ 758
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income (loss) | 52 |  |  |  | 52
Other comprehensive income (loss), net | 2 |  |  | 2 |
Share-based compensation, shares |  | 1.0 |  |  |
Share-based compensation | 36 |  | 36 |  |
Tax benefit from share-based compensation | 2 |  | 2 |  |
Exchange of 1.625% Convertible Notes | $ 0 |  |  |  |
Ending Balance, shares at Dec. 31, 2016 | 55.8 | 57.0 |  |  |
Ending Balance at Dec. 31, 2016 | $ 1,649 | $ 0 | 841 | (2) | 810
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income (loss) | (512) |  |  |  | (512)
Other comprehensive income (loss), net | (3) |  |  | (3) |
Share-based compensation | 42 |  | 42 |  |
Exchange of 1.625% Convertible Notes, shares |  | 3.0 |  |  |
Exchange of 1.625% Convertible Notes | $ 161 |  | 161 |  |
Ending Balance, shares at Dec. 31, 2017 | 59.3 | 60.0 |  |  |
Ending Balance at Dec. 31, 2017 | $ 1,337 | $ 0 | 1,044 | (5) | 298
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Adoption of ASU | Adoption of Topic 606 | 6 |  |  |  | 6
Adoption of ASU | Adoption of ASU 2018-02 | 0 |  |  | (1) | 1
Net income (loss) | 707 |  |  |  |
Other comprehensive income (loss), net | (2) |  |  | (2) |
Share-based compensation | 37 |  | 37 |  |
Exchange of 1.625% Convertible Notes, shares |  | 2.0 |  |  |
Exchange of 1.625% Convertible Notes | 108 |  | 108 |  |
Partial termination of 1.125% Warrants | (550) |  | (550) |  |
Conversion of 1.625% Convertible Notes | 4 |  | 4 |  |
Ending Balance, shares at Dec. 31, 2018 |  | 62.0 |  |  |
Ending Balance at Dec. 31, 2018 | $ 1,647 | $ 0 | $ 643 | $ (8) | $ 1,012

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