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Earnings Per Share | 6 Months Ended
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Jun. 30, 2016
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Earnings Per Share | Note 11: Earnings Per Share Earnings per share is calculated using the two-class method in which earnings are allocated to common stock and participating securities based on their rights to receive nonforfeitable dividends or dividend equivalents. The Company grants restricted stock and restricted stock units to certain employees and non-employee directors in accordance with the Company’s long-term incentive programs, which entitle the participants to receive nonf orfeitable dividends or dividend equivalents during the vesting period on the same basis as those dividends are paid to common shareholders. These unvested stock awards represent participating securities. During periods of net income, the calculation of ea rnings per share exclude the income attributable to participating securities in the numerator and the dilutive impact of these securities from the denominator. During periods of net loss, no effect is given to participating securities in the numerator and the denominator excludes the dilutive impact of these securities since they do not share in the losses of the Company. Basic earnings per share excludes dilution and is computed by dividing net income available to common shareholders by the weighted avera ge number of common shares outstanding during the period. Diluted earnings per share reflects the dilutive effect of all stock options, warrants and unvested restricted stock outstanding during the period that could potentially result in the issuance of co mmon stock. The dilution from stock options, warrants and unvested restricted stock are calculated by applying the two-class method and using the treasury stock method. The treasury stock method assumes the proceeds from the exercise of stock options and w arrants or the unrecognized compensation expense from unvested restricted stock will be used to purchase shares of the Company’s common stock at the average market price during the period. For the three months ended June 30, 2016 and 2015, there wer e 16,144,902 and 17,983,125, respectively, of stock options, warrants and unvested restricted stock outstanding that were antidilutive. For the six months ended June 30, 2016 and 2015, there were 16,099,818 and 17,970,329, respectively, of stock options, warrants and unvested restricted stock outstanding that were antidilutive. The following table presents the computation of basic and diluted earnings per share for the three and six months ended June 30, 2016 and 2015:
|  |  | Three Months Ended June 30, |  | Six Months Ended June 30,
In millions except share and per share amounts |  | 2016 |  | 2015 |  | 2016 |  |  | 2015
Basic earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (27) |  | $ | 64 |  | $ | (105) |  | $ | 133
Less: undistributed earnings allocated to participating securities |  |  | - |  |  | 2 |  |  | - |  |  | 4
Net income (loss) available to common shareholders |  |  | (27) |  |  | 62 |  |  | (105) |  |  | 129
Basic weighted average shares (1) |  |  | 132,677,066 |  |  | 172,146,651 |  |  | 134,245,952 |  |  | 176,914,777
Net income (loss) per basic common share: |  | $ | (0.20) |  | $ | 0.36 |  | $ | (0.78) |  | $ | 0.73
Diluted earnings per share: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  | (27) |  |  | 64 |  |  | (105) |  |  | 133
Less: undistributed earnings allocated to participating securities |  |  | - |  |  | 2 |  |  | - |  |  | 4
Net income (loss) available to common shareholders |  |  | (27) |  |  | 62 |  |  | (105) |  |  | 129
Basic weighted average shares (1) |  |  | 132,677,066 |  |  | 172,146,651 |  |  | 134,245,952 |  |  | 176,914,777
Effect of common stock equivalents: |  |  |  |  |  |  |  |  |  |  |  |
| Stock options |  |  | - |  |  | 1,007,668 |  |  | - |  |  | 1,004,181
Diluted weighted average shares |  |  | 132,677,066 |  |  | 173,154,319 |  |  | 134,245,952 |  |  | 177,918,958
Net income (loss) per diluted common share: |  | $ | (0.20) |  | $ | 0.36 |  | $ | (0.78) |  | $ | 0.72
_________ |  |  |  |  |  |  |  |  |  |  |  |
(1) - Includes 932,355 and 581,102 of participating securities that met the service condition and were eligible to receive nonforfeitable dividends or dividend equivalents for the three months ended June 30, 2016 and 2015, respectively. Includes 822,642 and 629,569 of participating securities that met the service condition and were eligible to receive nonforfeitable dividends or dividend equivalents for the six months ended June 30, 2016 and 2015, respectively.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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