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Earnings (Loss) Per Share (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Options | Dec. 31, 2012 Options | Dec. 31, 2011 Options | Jun. 29, 2009 Convertible notes 5% Convertible Senior Notes due 2014 | Dec. 31, 2013 Convertible notes 1.125% Convertible Senior Notes due 2018 | Aug. 16, 2013 Convertible notes 1.125% Convertible Senior Notes due 2018
Anti-dilutive shares excluded from calculation of earnings per share |  |  |  |  |  |  |  |  |
Anti-dilutive shares excluded from calculation of earnings per share |  |  |  | 7.3 | 12.2 | 12.0 |  |  |
Dilutive potential shares excluded from calculation of earnings per share (in shares) due to the loss position |  |  |  |  |  |  |  |  |
Dilutive potential shares excluded from calculation of earnings per share (in shares) due to the loss position | 3.3 | 6.8 | 4.1 |  |  |  |  |  |
Stated Interest rate (as a percent) |  |  |  |  |  |  | 5.00% | 1.125% | 1.125%
Initial conversion price of notes (in dollars per share) |  |  |  |  |  |  | $ 19.31 |  | $ 12.07

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