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Earnings Per Share | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share The following table sets forth the calculation of basic and diluted net earnings per common share for the years ended December 31 ($ in millions, except shares in thousands and per share data in dollars):
| 2018 |  | 2017 |  | 2016
Earnings attributable to Centene Corporation | $ | 900 |  |  | $ | 828 |  |  | $ | 562 |
Shares used in computing per share amounts: |  |  |  |  |  |
Weighted average number of common shares outstanding | 390,248 |  |  | 344,853 |  |  | 319,135 |
Common stock equivalents (as determined by applying the treasury stock method) | 8,258 |  |  | 8,551 |  |  | 8,816 |
Weighted average number of common shares and potential dilutive common shares outstanding | 398,506 |  |  | 353,404 |  |  | 327,951 |
Net earnings per common share attributable to Centene Corporation: |  |  |  |  |
Basic earnings per common share | $ | 2.31 |  |  | $ | 2.40 |  |  | $ | 1.76 |
Diluted earnings per common share | $ | 2.26 |  |  | $ | 2.34 |  |  | $ | 1.71 |
The calculation of diluted earnings per common share for 2018, 2017 and 2016 excludes the impact of 58 thousand shares, 106 thousand shares and 252 thousand shares, respectively, related to anti-dilutive stock options, restricted stock and restricted stock units.

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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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