Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator
Net income before allocation to noncontrolling interests	$ 528	$ 552	$ 1,651	$ 1,621
Less: Net loss attributable to noncontrolling interests	(1)	0	(2)	(2)
Net income attributable to Zoetis Inc.	$ 529	$ 552	$ 1,653	$ 1,623
Denominator
Weighted-average common shares outstanding	467,800,000	474,000,000.0	470,000,000.0	474,800,000
Common stock equivalents: stock options, RSUs, PSUs and DSUs	1,300,000	2,300,000	1,600,000	2,300,000
Weighted-average common and potential dilutive shares outstanding	469,100,000	476,300,000	471,600,000	477,100,000
Earnings per share attributable to Zoetis stockholders—basic (in dollars per share)	$ 1.13	$ 1.16	$ 3.52	$ 3.42
Earnings per share attributable to Zoetis stockholders—diluted (in dollars per share)	$ 1.13	$ 1.16	$ 3.51	$ 3.40
Antidilutive securities excluded from computation of earnings per share, amount	0	0	0	0