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Earnings (Loss) Per Share (Details 2) - $ / shares shares in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Aug. 16, 2013 | Jun. 29, 2009
Options |  |  |  |  |
Anti-dilutive shares excluded from calculation of earnings per share |  |  |  |  |
Anti-dilutive shares excluded from calculation of earnings per share | 2.2 | 2.5 | 5.6 |  |
Convertible notes | 5% Convertible Senior Notes due 2014 |  |  |  |  |
Dilutive potential shares excluded from calculation of earnings per share (in shares) due to the loss position |  |  |  |  |
Stated Interest rate (as a percent) |  |  |  |  | 5.00%
Initial conversion price of notes (in dollars per share) |  |  |  |  | $ 19.31
Convertible notes | 1.125% Convertible Senior Notes due 2018 |  |  |  |  |
Dilutive potential shares excluded from calculation of earnings per share (in shares) due to the loss position |  |  |  |  |
Stated Interest rate (as a percent) |  |  |  | 1.125% |
Initial conversion price of notes (in dollars per share) |  |  |  | $ 12.07 |

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