Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator
Net income before allocation to noncontrolling interests	$ 692	$ 596	$ 1,915	$ 1,817
Less: Net income/(loss) attributable to noncontrolling interests	10	0	10	(2)
Net income attributable to Zoetis Inc.	$ 682	$ 596	$ 1,905	$ 1,819
Denominator
Weighted-average common shares outstanding	452.9	460.3	455.4	461.9
Common stock equivalents: stock options, RSUs, PSUs and DSUs	0.6	1.1	0.7	1.1
Weighted-average common and potential dilutive shares outstanding	453.5	461.4	456.1	463.0
Earnings per share attributable to Zoetis stockholders—basic (in dollars per share)	$ 1.51	$ 1.29	$ 4.18	$ 3.94
Earnings per share attributable to Zoetis stockholders—diluted (in dollars per share)	$ 1.50	$ 1.29	$ 4.18	$ 3.93