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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
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 ($ in millions, except per share data in dollars and shares in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Earnings attributable to Centene Corporation | $ | 584 |  |  | $ | 568 |  |  | $ | 748 |  |  | $ | 1,820 |
Shares used in computing per share amounts: |  |  |  |  |  |  |
Weighted average number of common shares outstanding | 583,244 |  |  | 579,510 |  |  | 582,636 |  |  | 567,586 |
Common stock equivalents (as determined by applying the treasury stock method) | 7,458 |  |  | 8,461 |  |  | 7,518 |  |  | 8,146 |
Weighted average number of common shares and potential dilutive common shares outstanding | 590,702 |  |  | 587,971 |  |  | 590,154 |  |  | 575,732 |
Net earnings per common share attributable to Centene Corporation: |  |  |  |
Basic earnings per common share | $ | 1.00 |  |  | $ | 0.98 |  |  | $ | 1.28 |  |  | $ | 3.21 |
Diluted earnings per common share | $ | 0.99 |  |  | $ | 0.97 |  |  | $ | 1.27 |  |  | $ | 3.16 |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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