Earnings per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Earnings per Share

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

	Three Months Ended					Six Months Ended
	June 30,					June 30,
(MILLIONS OF DOLLARS AND SHARES, EXCEPT PER SHARE DATA)	2019		2018			2019		2018
Numerator
Net income before allocation to noncontrolling interests	$	371	$	382		$	683	$	732
Less: Net loss attributable to noncontrolling interests	—		(2		)	—		(4		)
Net income attributable to Zoetis Inc.	$	371	$	384		$	683	$	736
Denominator
Weighted-average common shares outstanding	478.8		483.8			479.2		484.8
Common stock equivalents: stock options, RSUs, PSUs and DSUs	3.5		3.7			3.5		3.8
Weighted-average common and potential dilutive shares outstanding	482.3		487.5			482.7		488.6
Earnings per share attributable to Zoetis Inc. stockholders—basic	$	0.77	$	0.79		$	1.43	$	1.52
Earnings per share attributable to Zoetis Inc. stockholders—diluted	$	0.77	$	0.79		$	1.41	$	1.51

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 and $1 million for the three months ended June 30, 2019 and June 30, 2018, respectively and de minimis for the six months ended June 30, 2019 and June 30, 2018, respectively.