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Earnings Per Share | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Earnings Per Share | NOTE 4 — EARNINGS PER SHARE We compute basic earnings per share using the weighted average number of common shares outstanding. We compute diluted earnings per share using the weighted average number of common shares outstanding, plus the dilutive effect of outstanding equity awards, computed using the treasury stock method. The following table sets forth the computation of basic and diluted earnings per share for the quarters ended March 31, 2021 and 2020 (dollars and shares in millions, except per share amounts):
|  | 2021 |  |  | 2020 |
Net income attributable to HCA Healthcare, Inc. |  | $ | 1,423 |  |  | $ | 581 |
Weighted average common shares outstanding |  |  | 338.123 |  |  |  | 338.242 |
Effect of dilutive incremental shares |  |  | 5.198 |  |  |  | 5.854 |
Shares used for diluted earnings per share |  |  | 343.321 |  |  |  | 344.096 |
Earnings per share: |  |  |  |  |  |  |  |
Basic earnings |  | $ | 4.21 |  |  | $ | 1.72 |
Diluted earnings |  | $ | 4.14 |  |  | $ | 1.69 |

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