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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

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)	2018				2017
Net income attributable to Merck & Co., Inc.	$	736			$	1,551
Average common shares outstanding	2,695				2,745
Common shares issuable (1)	15				21
Average common shares outstanding assuming dilution	2,710				2,766
Basic earnings per common share attributable to Merck & Co., Inc. common shareholders	$	0.27			$	0.56
Earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders	$	0.27			$	0.56

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

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- References

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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/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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