CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Apr. 03, 2016	Mar. 29, 2015
Income Statement [Abstract]
Revenue		$ 1,162	$ 1,102
Costs and expenses:
Cost of Sales	[1]	389	394
Selling, general and administrative expenses	[1]	315	354
Research and development expenses	[1]	90	80
Amortization of intangible assets	[1]	21	15
Restructuring charges and certain acquisition-related costs		2	1
Interest expense, net of capitalized interest		43	28
Other (income)/deductions—net		(30)	0
Income before provision for taxes on income	[2]	332	230
Provision for taxes on income		128	65
Net income before allocation to noncontrolling interests		204	165
Less: Net income attributable to noncontrolling interests		0	0
Net income attributable to Zoetis Inc.		$ 204	$ 165
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)		$ 0.41	$ 0.33
Diluted (in dollars per share)		$ 0.41	$ 0.33
Weighted-average common shares outstanding:
Basic (in shares)		497.4	501.1
Diluted (in shares)		499.5	503.2
Dividends paid per common share (in dollars per share)		$ 0.095	$ 0.083

[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.