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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Calculations of Earnings Per Share | The calculations of earnings per share are as follows:
| Three Months Ended March 31, |  |
($ and shares in millions except per share amounts) | 2023 |  | 2022 |  |  |  |
Net Income Attributable to Merck & Co., Inc. | $ | 2,821 |  |  | $ | 4,310 |  |  |  |  |
Average common shares outstanding | 2,538 |  |  | 2,528 |  |  |  |  |
Common shares issuable (1) | 13 |  |  | 9 |  |  |  |  |
Average common shares outstanding assuming dilution | 2,551 |  |  | 2,537 |  |  |  |  |
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders | $ | 1.11 |  |  | $ | 1.70 |  |  |  |  |
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders | $ | 1.11 |  |  | $ | 1.70 |  |  |  |  |
(1) Issuable primarily under share-based compensation plans.

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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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