Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Calculations of (Loss) Earnings Per Share

The calculations of (loss) earnings per share are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
($ and shares in millions except per share amounts)	2023		2022		2023		2022
Net (Loss) Income Attributable to Merck & Co., Inc.	$	(5,975)	$	3,944	$	(3,154)	$	8,254
Average common shares outstanding	2,539		2,531		2,539		2,529
Common shares issuable (1)	—		9		—		9
Average common shares outstanding assuming dilution	2,539		2,540		2,539		2,538
Basic (Loss) Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders	$	(2.35)	$	1.56	$	(1.24)	$	3.26
(Loss) Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders	$	(2.35)	$	1.55	$	(1.24)	$	3.25

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