CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Income Statement [Abstract]
Revenue		$ 1,241	$ 1,214	$ 3,611	$ 3,491
Costs and expenses:
Cost of Sales	[1]	410	421	1,198	1,242
Selling, general and administrative expenses	[1]	345	374	1,003	1,107
Research and development expenses	[1]	90	91	268	255
Amortization of intangible assets	[1]	21	15	64	45
Restructuring charges/(benefits) and certain acquisition-related costs		4	13	(15)	280
Interest expense, net of capitalized interest		41	29	125	86
Other (income)/deductions—net		(3)	(2)	(29)	0
Income before provision for taxes on income	[2]	333	273	997	476
Provision for taxes on income		96	83	332	157
Net income before allocation to noncontrolling interests		237	190	665	319
Less: Net (loss)/income attributable to noncontrolling interests		(2)	1	(2)	2
Net income attributable to Zoetis Inc.		$ 239	$ 189	$ 667	$ 317
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)		$ 0.48	$ 0.38	$ 1.34	$ 0.63
Diluted (in dollars per share)		$ 0.48	$ 0.38	$ 1.34	$ 0.63
Weighted-average common shares outstanding:
Basic (in shares)		495.2	499.2	496.3	500.2
Diluted (in shares)		497.9	501.7	498.8	502.5
Dividends paid per common share (in dollars per share)		$ 0	$ 0.083	$ 0.190	$ 0.166

[1] Amortization expense related to finite-lived acquired intangible assets that contribute to our ability to sell, manufacture, research, market and distribute products, compounds and intellectual property is included in Amortization of intangible assets as these intangible assets benefit multiple business functions. Amortization expense related to finite-lived acquired intangible assets that are associated with a single function is included in Cost of sales, Selling, general and administrative expenses or Research and development expenses, as appropriate, in the condensed consolidated statements of income.

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