Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator
Net income before allocation to noncontrolling interests	$ 721	$ 692	$ 2,070	$ 1,915
Less: Net income/(loss) attributable to noncontrolling interests	0	10	0	10
Net income attributable to Zoetis Inc.	$ 721	$ 682	$ 2,070	$ 1,905
Denominator
Weighted-average common shares outstanding	442.9	452.9	445.2	455.4
Common stock equivalents: stock options, RSUs, PSUs and DSUs	0.3	0.6	0.4	0.7
Weighted-average common and potential dilutive shares outstanding	443.2	453.5	445.6	456.1
Earnings per share attributable to Zoetis stockholders—basic (in dollars per share)	$ 1.63	$ 1.51	$ 4.65	$ 4.18
Earnings per share attributable to Zoetis stockholders—diluted (in dollars per share)	$ 1.63	$ 1.50	$ 4.65	$ 4.18