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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Calculation Of Basic And Diluted Net Earnings Per Common 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 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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