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Earnings Per Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per share (EPS) is calculated using the weighted average number of common shares outstanding during the period and includes the effect of any participating securities as appropriate. Participating securities consist of unvested restricted stock issued to our employees and non-employee directors that provide dividend rights. Diluted EPS is calculated assuming the issuance of common shares for all potentially dilutive securities, provided the effect is not antidilutive. For all periods presented, our contingent convertible senior notes did not have a dilutive effect and, therefore, were excluded from the calculation of diluted EPS. See Note 3 for further discussion of our convertible senior notes and contingent convertible senior notes. A reconciliation of basic EPS and diluted EPS is as follows:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
|  | (in millions, except per share data)
Net income (loss) available to common stockholders |  | $ | 60 |  |  | $ | (41 | ) |  | $ | 288 |  |  | $ | 506 |
Effect of dilutive securities |  | — |  |  | — |  |  | — |  |  | — |
Diluted income (loss) available to common stockholders |  | $ | 60 |  |  | $ | (41 | ) |  | $ | 288 |  |  | $ | 506 |
Weighted average common and common equivalent shares outstanding - basic |  | 910 |  |  | 909 |  |  | 909 |  |  | 908 |
Effect of dilutive securities |  | 1 |  |  | — |  |  | — |  |  | — |
Weighted average common and common equivalent shares outstanding - diluted |  | 911 |  |  | 909 |  |  | 909 |  |  | 908 |
Net income per share attributable to Chesapeake: |  |  |  |  |  |  |  |
Basic |  | $ | 0.07 |  |  | $ | (0.05 | ) |  | $ | 0.32 |  |  | $ | 0.56 |
Diluted |  | $ | 0.07 |  |  | $ | (0.05 | ) |  | $ | 0.32 |  |  | $ | 0.56 |
Shares of common stock for the following securities were excluded from the calculation of diluted EPS as the effect was antidilutive: |  |  |  |  |  |  |  |
Common stock equivalent of our preferred stock outstanding |  | 60 |  |  | 60 |  |  | 60 |  |  | 60 |
Common stock equivalent of our convertible senior notes outstanding |  | 146 |  |  | 146 |  |  | 146 |  |  | 146 |
Participating securities |  | 2 |  |  | — |  |  | 1 |  |  | 1 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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