Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share

The following table presents the calculation of basic and diluted earnings per share:

	Three Months Ended
	March 31,
(MILLIONS OF DOLLARS AND SHARES, EXCEPT PER SHARE DATA)	2021		2020
Numerator
Net income before allocation to noncontrolling interests	$	558	$	423
Less: Net loss attributable to noncontrolling interests	(1)		—
Net income attributable to Zoetis Inc.	$	559	$	423
Denominator
Weighted-average common shares outstanding	475.5		475.6
Common stock equivalents: stock options, RSUs, PSUs and DSUs	2.4		3.4
Weighted-average common and potential dilutive shares outstanding	477.9		479.0
Earnings per share attributable to Zoetis Inc. stockholders—basic	$	1.18	$	0.89
Earnings per share attributable to Zoetis Inc. stockholders—diluted	$	1.17	$	0.88