Earnings per Share

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Earnings per Share

14. Earnings per Share

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

	Three Months Ended
(MILLIONS OF DOLLARS AND SHARES, EXCEPT PER SHARE DATA)	March 31,
	2022		2021
Numerator
Net income before allocation to noncontrolling interests	$	594	$	558
Less: Net loss attributable to noncontrolling interests	(1)		(1)
Net income attributable to Zoetis Inc.	$	595	$	559
Denominator
Weighted-average common shares outstanding	472.2		475.5
Common stock equivalents: stock options, RSUs, PSUs and DSUs	1.9		2.4
Weighted-average common and potential dilutive shares outstanding	474.1		477.9
Earnings per share attributable to Zoetis Inc. stockholders—basic	$	1.26	$	1.18
Earnings per share attributable to Zoetis Inc. stockholders—diluted	$	1.26	$	1.17

The number of stock options outstanding under the company's Equity Plan that were excluded from the computation of diluted earnings per share, as the effect would have been antidilutive, were de minimis for the three months ended March 31, 2022 and 2021.