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Consolidated Statements of Equity - USD ($) $ in Millions | Total | Common Stock Shares | Common Stock Amount | Accumulated Other Comprehensive Loss | Retained Earnings
--- | --- | --- | --- | --- | ---
Balance, shares at Dec. 31, 2015 |  | 88,792,751 |  |  |
Balance at Dec. 31, 2015 | $ 2,258 |  | $ 1,196 | $ (8) | $ 1,070
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Shares issued pursuant to equity-based plans |  | 153,953 |  |  |
Proceeds from issuance of shares pursuant to equity-based plans | 1 |  | 1 |  |
Stock-based compensation | 4 |  | 4 | 0 | 0
Dividends declared | (113) |  | 0 | 0 | (113)
Net income (loss) | 193 |  | 0 | 0 | 193
Other comprehensive income (loss) | 1 |  | 0 | 1 | 0
Balance, shares at Dec. 31, 2016 |  | 88,946,704 |  |  |
Balance at Dec. 31, 2016 | 2,344 |  | 1,201 | (7) | 1,150
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Shares issued pursuant to equity-based plans |  | 167,561 |  |  |
Proceeds from issuance of shares pursuant to equity-based plans | 2 |  | 2 |  |
Stock-based compensation | 4 |  | 4 | 0 | 0
Dividends declared | (120) |  | 0 | 0 | (120)
Net income (loss) | 187 |  | 0 | 0 | 187
Other comprehensive income (loss) | (1) |  | 0 | (1) | 0
Balance, shares at Dec. 31, 2017 |  | 89,114,265 |  |  |
Balance at Dec. 31, 2017 | 2,416 |  | 1,207 | (8) | 1,217
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Shares issued pursuant to equity-based plans |  | 153,694 |  |  |
Proceeds from issuance of shares pursuant to equity-based plans | 1 |  | 1 |  |
Stock-based compensation | 4 |  | 4 | 0 | 0
Dividends declared | (128) |  | 0 | 0 | (128)
Net income (loss) | 212 |  | 0 | 0 | 212
Other comprehensive income (loss) | 1 |  | 0 | 1 | 0
Balance, shares at Dec. 31, 2018 |  | 89,267,959 |  |  |
Balance at Dec. 31, 2018 | $ 2,506 |  | $ 1,212 | $ (7) | $ 1,301

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