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Consolidated Statements of Equity (USD $) In Millions, except Share data, unless otherwise specified | Total USD ($) | Common Stock Shares | Common Stock Amount USD ($) | Accumulated Other Comprehensive Loss USD ($) | Retained Earnings USD ($) | Noncontrolling Interests' Equity USD ($)
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2009 |  |  | $ 829 | $ (6) | $ 719 | $ 1
Balance, shares at Dec. 31, 2009 |  | 75,210,580 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Shares issued pursuant to equity-based plans |  | 105,839 |  |  |  |
Proceeds from issuance of shares pursuant to equity-based plans |  |  | 1 |  |  |
Noncontrolling interests' capital contributions |  |  | 0 | 0 | 0 | (10)
Stock-based compensation |  |  | 1 | 0 | 0 | 0
Dividends declared |  |  | 0 | 0 | (78) | 0
Net income (loss) | 121 |  | 0 | 0 | 125 | (4)
Other comprehensive income (loss) |  |  | 0 | 1 | 0 | 0
Balance at Dec. 31, 2010 |  |  | 831 | (5) | 766 | 7
Balance, shares at Dec. 31, 2010 |  | 75,316,419 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Shares issued pursuant to equity-based plans |  | 46,537 |  |  |  |
Proceeds from issuance of shares pursuant to equity-based plans |  |  | 1 |  |  |
Noncontrolling interests' capital contributions |  |  | 0 | 0 | 0 | (4)
Stock-based compensation |  |  | 4 | 0 | 0 | 0
Dividends declared |  |  | 0 | 0 | (80) | 0
Net income (loss) | 147 |  | 0 | 0 | 147 | 0
Other comprehensive income (loss) |  |  | 0 | (1) | 0 | 0
Balance at Dec. 31, 2011 | 1,666 |  | 836 | (6) | 833 | 3
Balance, shares at Dec. 31, 2011 |  | 75,362,956 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Shares issued pursuant to equity-based plans |  | 193,316 |  |  |  |
Proceeds from issuance of shares pursuant to equity-based plans |  |  | 1 |  |  |
Stock-based compensation |  |  | 4 | 0 | 0 | 0
Dividends declared |  |  | 0 | 0 | (81) | 0
Net income (loss) | 140 |  | 0 | 0 |  | (1)
Balance at Dec. 31, 2012 | $ 1,730 |  | $ 841 | $ (6) | $ 893 | $ 2
Balance, shares at Dec. 31, 2012 |  | 75,556,272 |  |  |  |

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