Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator
Net income before allocation to noncontrolling interests	$ 154	$ 237	$ 224	$ 204	$ 20	$ 190	$ (36)	$ 165	$ 819	$ 339	$ 587
Less: net (loss)/income attributable to noncontrolling interests	0	(2)	0	0	(2)	1	1	0	(2)	0	4
Net income attributable to Zoetis Inc.	$ 154	$ 239	$ 224	$ 204	$ 22	$ 189	$ (37)	$ 165	$ 821	$ 339	$ 583
Denominator
Weighted-average common shares outstanding									495,715	499,707	501,055
Common stock equivalents: stock options, RSUs, DSUs and PSUs									2,510	2,312	970
Weighted-average common and potential dilutive shares outstanding									498,225	502,019	502,025
Earnings per share attributable to Zoetis Inc. stockholders—basic (in dollars per share)	$ 0.31	$ 0.48	$ 0.45	$ 0.41	$ 0.04	$ 0.38	$ (0.07)	$ 0.33	$ 1.66	$ 0.68	$ 1.16
Earnings per share attributable to Zoetis stockholders—diluted (in dollars per share)	$ 0.31	$ 0.48	$ 0.45	$ 0.41	$ 0.04	$ 0.38	$ (0.07)	$ 0.33	$ 1.65	$ 0.68	$ 1.16
Stock Options
Denominator
Number of stock options excluded from the computation of diluted earnings per share									1,000	1,000