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Earnings Per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2019
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 March 31,
In millions, except per share amounts | 2019 |  | 2018
Numerator for earnings per share calculation: |  |  |
Net income | $ | 1,427 |  |  | $ | 998 |
Income allocated to participating securities | (2 | ) |  | (2 | )
Net income attributable to noncontrolling interest | (6 | ) |  | — |
Net income attributable to CVS Health | $ | 1,419 |  |  | $ | 996 |
Denominator for earnings per share calculation: |  |  |
Weighted average shares, basic | 1,298 |  |  | 1,016 |
Effect of dilutive securities | 4 |  |  | 3 |
Weighted average shares, diluted | 1,302 |  |  | 1,019 |
Earnings per share: |  |  |
Basic | $ | 1.09 |  |  | $ | 0.98 |
Diluted | $ | 1.09 |  |  | $ | 0.98 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | Earnings per share is computed using the two-class method. Stock appreciation rights and options to purchase 15.3 million shares of common stock were outstanding, but were excluded from the calculation of diluted earnings per share, for the three months ended March 31, 2019 because their exercise prices were greater than the average market price of the common shares and, therefore, the effect would be antidilutive. For the same reason, options to purchase 13.2 million shares of common stock were outstanding, but were excluded from the calculation of diluted earnings per share, for the three months ended March 31, 2018.

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + 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 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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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