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Earnings Per Share | 9 Months Ended
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Sep. 30, 2021
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 ($ 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 |
The calculation of diluted earnings per common share for the three months ended September 30, 2021 and 2020 excludes the impact of 111 thousand and 64 thousand shares, respectively, related to anti-dilutive stock options, restricted stock and restricted stock units. The calculation of diluted earnings per common share for the nine months ended September 30, 2021 and 2020 excludes the impact of 57 thousand and 75 thousand shares, respectively, related to anti-dilutive stock options, restricted stock and restricted stock units.

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