Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator
Net income before allocation to noncontrolling interests	$ 529	$ 511	$ 1,123	$ 1,069
Less: Net loss attributable to noncontrolling interests	0	(1)	(1)	(2)
Net income attributable to Zoetis Inc.	$ 529	$ 512	$ 1,124	$ 1,071
Denominator
Weighted-average common shares outstanding	470,000,000.0	474,800,000	471,100,000	475,200,000
Common stock equivalents: stock options, RSUs, PSUs and DSUs	1,500,000	2,200,000	1,700,000	2,300,000
Weighted-average common and potential dilutive shares outstanding	471,500,000	477,000,000.0	472,800,000	477,500,000
Earnings per share attributable to Zoetis stockholders—basic (in dollars per share)	$ 1.13	$ 1.08	$ 2.39	$ 2.25
Earnings per share attributable to Zoetis stockholders—diluted (in dollars per share)	$ 1.12	$ 1.07	$ 2.38	$ 2.24
Antidilutive securities excluded from computation of earnings per share, amount	0	0	0	0