Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator
Net income before allocation to noncontrolling interests	$ 596	$ 528	$ 1,817	$ 1,651
Less: Net loss attributable to noncontrolling interests	0	(1)	(2)	(2)
Net income attributable to Zoetis Inc.	$ 596	$ 529	$ 1,819	$ 1,653
Denominator
Weighted-average common shares outstanding	460,300,000	467,800,000	461,900,000	470,000,000.0
Common stock equivalents: stock options, RSUs, PSUs and DSUs	1,100,000	1,300,000	1,100,000	1,600,000
Weighted-average common and potential dilutive shares outstanding	461,400,000	469,100,000	463,000,000.0	471,600,000
Earnings per share attributable to Zoetis stockholders—basic (in dollars per share)	$ 1.29	$ 1.13	$ 3.94	$ 3.52
Earnings per share attributable to Zoetis stockholders—diluted (in dollars per share)	$ 1.29	$ 1.13	$ 3.93	$ 3.51
Antidilutive securities excluded from computation of earnings per share, amount	0			0