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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Schedule of Computations of Basic and Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share for the quarters and nine months ended September 30, 2018 and 2017 (dollars and shares in millions, except per share amounts):
|  | Quarter |  |  | Nine Months |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Net income attributable to HCA Healthcare, Inc. |  | $ | 759 |  |  | $ | 426 |  |  | $ | 2,723 |  |  | $ | 1,742 |
Weighted average common shares outstanding |  |  | 345.823 |  |  |  | 360.170 |  |  |  | 348.411 |  |  |  | 365.398 |
Effect of dilutive incremental shares |  |  | 7.816 |  |  |  | 9.664 |  |  |  | 7.713 |  |  |  | 9.615 |
Shares used for diluted earnings per share |  |  | 353.639 |  |  |  | 369.834 |  |  |  | 356.124 |  |  |  | 375.013 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings |  | $ | 2.20 |  |  | $ | 1.18 |  |  | $ | 7.82 |  |  | $ | 4.77 |
Diluted earnings |  | $ | 2.15 |  |  | $ | 1.15 |  |  | $ | 7.65 |  |  | $ | 4.64 |

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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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