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CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Retained Earnings
--- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Adoption of ASU | Topic 606 | $ 6 |  |  |  | $ 6
Adoption of ASU | ASU 2018-02 | $ 1 |  |  |  | 1
Beginning Balance (in shares) at Dec. 31, 2017 | 59 | 60 |  |  |
Beginning Balance at Dec. 31, 2017 | $ 1,337 | $ 0 | $ 1,044 | $ (5) | 298
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 107 |  |  |  | 107
1.625% Convertible Notes exchange transaction (in shares) |  | 2 |  |  |
1.625% Convertible Notes exchange transaction | 108 |  | 108 |  |
Other comprehensive loss, net | (7) |  |  | (7) |
Share-based compensation | 1 |  | 1 |  |
Ending Balance (in shares) at Mar. 31, 2018 |  | 62 |  |  |
Ending Balance at Mar. 31, 2018 | $ 1,553 | $ 0 | $ 1,153 | $ (12) | $ 412

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