Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2024

Earnings Per Share [Abstract]

Calculations of Earnings Per Share

The calculations of earnings per share (shares in millions) are as follows:

Years Ended December 31	2024		2023		2022
Net Income Attributable to Merck & Co., Inc.	$	17,117	$	365	$	14,519
Average common shares outstanding	2,532		2,537		2,532
Common shares issuable (1)	9		10		10
Average common shares outstanding assuming dilution	2,541		2,547		2,542
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders	$	6.76	$	0.14	$	5.73
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders	$	6.74	$	0.14	$	5.71

(1)     Issuable primarily under share-based compensation plans.