Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator
Net income before allocation to noncontrolling interests	$ 670	$ 529	$ 1,221	$ 1,123
Less: Net loss attributable to noncontrolling interests	(1)	0	(2)	(1)
Net income attributable to Zoetis Inc.	$ 671	$ 529	$ 1,223	$ 1,124
Denominator
Weighted-average common shares outstanding	461,900,000	470,000,000.0	462,700,000	471,100,000
Common stock equivalents: stock options, RSUs, PSUs and DSUs	1,000,000.0	1,500,000	1,100,000	1,700,000
Weighted-average common and potential dilutive shares outstanding	462,900,000	471,500,000	463,800,000	472,800,000
Earnings per share attributable to Zoetis stockholders—basic (in dollars per share)	$ 1.45	$ 1.13	$ 2.64	$ 2.39
Earnings per share attributable to Zoetis stockholders—diluted (in dollars per share)	$ 1.45	$ 1.12	$ 2.64	$ 2.38
Antidilutive securities excluded from computation of earnings per share, amount	0			0