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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2024
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) | 2024 |  | 2023 |  |  |  |
Net Income Attributable to Merck & Co., Inc. | $ | 4,762 |  |  | $ | 2,821 |  |  |  |  |
Average common shares outstanding | 2,533 |  |  | 2,538 |  |  |  |  |
Common shares issuable (1) | 11 |  |  | 13 |  |  |  |  |
Average common shares outstanding assuming dilution | 2,544 |  |  | 2,551 |  |  |  |  |
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders | $ | 1.88 |  |  | $ | 1.11 |  |  |  |  |
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders | $ | 1.87 |  |  | $ | 1.11 |  |  |  |  |
(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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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