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Earnings per Share (Tables)
 9 Months Ended
Sep. 30, 2022
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 EndedNine Months Ended
(MILLIONS OF DOLLARS AND SHARES, EXCEPT PER SHARE DATA)September 30,September 30,
2022202120222021
Numerator
Net income before allocation to noncontrolling interests$528 $552 $1,651 $1,621 
Less: Net loss attributable to noncontrolling interests(1)— (2)(2)
Net income attributable to Zoetis Inc.$529 $552 $1,653 $1,623 
Denominator
Weighted-average common shares outstanding467.8 474.0 470.0 474.8 
Common stock equivalents: stock options, RSUs, PSUs and DSUs1.3 2.3 1.6 2.3 
Weighted-average common and potential dilutive shares outstanding469.1 476.3 471.6 477.1 
Earnings per share attributable to Zoetis Inc. stockholders—basic$1.13 $1.16 $3.52 $3.42 
Earnings per share attributable to Zoetis Inc. stockholders—diluted$1.13 $1.16 $3.51 $3.40