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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Earnings Per Share | The following is a reconciliation of basic and diluted earnings per share for the respective periods:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
In millions, except per share amounts | 2020 |  | 2019 |  | 2020 |  | 2019
Numerator for earnings per share calculation: |  |  |  |  |  |  |
Net income | $ | 1,219 |  |  | $ | 1,529 |  |  | $ | 6,217 |  |  | $ | 4,887 |
Income allocated to participating securities | — |  |  | — |  |  | — |  |  | (3) |
Net (income) loss attributable to noncontrolling interests | 5 |  |  | 1 |  |  | (11) |  |  | — |
Net income attributable to CVS Health | $ | 1,224 |  |  | $ | 1,530 |  |  | $ | 6,206 |  |  | $ | 4,884 |
Denominator for earnings per share calculation: |  |  |  |  |  |  |
Weighted average shares, basic | 1,310 |  |  | 1,302 |  |  | 1,308 |  |  | 1,300 |
Effect of dilutive securities | 5 |  |  | 3 |  |  | 6 |  |  | 3 |
Weighted average shares, diluted | 1,315 |  |  | 1,305 |  |  | 1,314 |  |  | 1,303 |
Earnings per share: |  |  |  |  |  |  |
Basic | $ | 0.93 |  |  | $ | 1.17 |  |  | $ | 4.74 |  |  | $ | 3.76 |
Diluted | $ | 0.93 |  |  | $ | 1.17 |  |  | $ | 4.72 |  |  | $ | 3.75 |

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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=6371337&loc=d3e3550-109257 + Details
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