Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Calculations of Earnings Per Share

The calculations of earnings per share are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
($ and shares in millions except per share amounts)	2023		2022		2023		2022
Net Income Attributable to Merck & Co., Inc.	$	4,745	$	3,248	$	1,591	$	11,502
Average common shares outstanding	2,537		2,533		2,538		2,531
Common shares issuable (1)	9		9		11		9
Average common shares outstanding assuming dilution	2,546		2,542		2,549		2,540
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders	$	1.87	$	1.28	$	0.63	$	4.55
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders	$	1.86	$	1.28	$	0.62	$	4.53

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