Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share

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

	Year Ended December 31,
(MILLIONS OF DOLLARS AND SHARES, EXCEPT PER SHARE DATA)	2019		2018			2017
Numerator
Net income before allocation to noncontrolling interests	$	1,500	$	1,424		$	862
Less: net loss attributable to noncontrolling interests	—		(4		)	(2		)
Net income attributable to Zoetis Inc.	$	1,500	$	1,428		$	864
Denominator
Weighted-average common shares outstanding	478.128		483.063			489.918
Common stock equivalents: stock options, RSUs, DSUs and PSUs	3.659		3.835			3.243
Weighted-average common and potential dilutive shares outstanding	481.787		486.898			493.161
Earnings per share attributable to Zoetis Inc. stockholders—basic	$	3.14	$	2.96		$	1.76
Earnings per share attributable to Zoetis Inc. stockholders—diluted	$	3.11	$	2.93		$	1.75