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Earnings per Share (Tables)
 6 Months Ended
Jun. 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 EndedSix Months Ended
(MILLIONS OF DOLLARS AND SHARES, EXCEPT PER SHARE DATA)June 30,June 30,
2022202120222021
Numerator
Net income before allocation to noncontrolling interests$529 $511 $1,123 $1,069 
Less: Net loss attributable to noncontrolling interests— (1)(1)(2)
Net income attributable to Zoetis Inc.$529 $512 $1,124 $1,071 
Denominator
Weighted-average common shares outstanding470.0 474.8 471.1 475.2 
Common stock equivalents: stock options, RSUs, PSUs and DSUs1.5 2.2 1.7 2.3 
Weighted-average common and potential dilutive shares outstanding471.5 477.0 472.8 477.5 
Earnings per share attributable to Zoetis Inc. stockholders—basic$1.13 $1.08 $2.39 $2.25 
Earnings per share attributable to Zoetis Inc. stockholders—diluted$1.12 $1.07 $2.38 $2.24