CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
Statement of Comprehensive Income [Abstract]
Net income before allocation to noncontrolling interests		$ 247	$ 224	$ 486	$ 428
Unrealized losses on derivatives, net	[1]	(1)	(3)	(1)	(3)
Other comprehensive income/(loss), net of taxes and reclassification adjustments:
Foreign currency translation adjustments, net		12	63	56	65
Benefit plans: Actuarial (losses)/gains, net	[1]	(1)	2	1	3
Total other comprehensive income/(loss), net of tax		10	62	56	65
Comprehensive income before allocation to noncontrolling interests		257	286	542	493
Less: Comprehensive income/(loss) attributable to noncontrolling interests		0	0	1	(1)
Comprehensive income attributable to Zoetis Inc.		$ 257	$ 286	$ 541	$ 494

[1] Presented net of reclassification adjustments and tax impacts, which are not significant in any period presented. Reclassification adjustments related to benefit plans are generally reclassified, as part of net periodic pension cost, into Cost of sales, Selling, general and administrative expenses, and/or Research and development expenses, as appropriate, in the condensed consolidated statements of income.