Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2018

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,			April 2,
(MILLIONS OF DOLLARS AND SHARES, EXCEPT PER SHARE DATA)	2018			2017
Numerator
Net income before allocation to noncontrolling interests	$	350		$	239
Less: Net (loss)/income attributable to noncontrolling interests	(2		)	1
Net income attributable to Zoetis Inc.	$	352		$	238
Denominator
Weighted-average common shares outstanding	485.9			492.4
Common stock equivalents: stock options, RSUs, PSUs and DSUs	3.9			2.9
Weighted-average common and potential dilutive shares outstanding	489.8			495.3
Earnings per share attributable to Zoetis Inc. stockholders—basic	$	0.72		$	0.48
Earnings per share attributable to Zoetis Inc. stockholders—diluted	$	0.72		$	0.48