CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2018	Apr. 02, 2017
Income Statement [Abstract]
Revenue		$ 1,366	$ 1,231
Costs and expenses:
Cost of Sales		447	443
Selling, general and administrative expenses		338	309
Research and development expenses		97	90
Amortization of intangible assets		23	22
Restructuring charges/(reversals) and certain acquisition-related costs		2	(1)
Interest expense, net of capitalized interest		47	41
Other (income)/deductions—net		(5)	(10)
Income before provision for taxes on income	[1]	417	337
Provision for taxes on income		67	98
Net income before allocation to noncontrolling interests		350	239
Less: Net (loss)/income attributable to noncontrolling interests		(2)	1
Net income attributable to Zoetis Inc.		$ 352	$ 238
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)		$ 0.72	$ 0.48
Diluted (in dollars per share)		$ 0.72	$ 0.48
Weighted-average common shares outstanding:
Basic (in shares)		485.9	492.4
Diluted (in shares)		489.8	495.3
Dividends paid per common share (in dollars per share)		$ 0.126	$ 0.105

[1] Defined as income before provision for taxes on income.