CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenue		$ 1,455	$ 1,366
Costs and expenses:
Cost of sales		518	447
Selling, general and administrative expenses		369	338
Research and development expenses		102	97
Amortization of intangible assets		38	23
Restructuring charges and certain acquisition-related costs		5	2
Interest expense, net of capitalized interest		56	47
Other (income)/deductions—net		(14)	(5)
Income before provision for taxes on income	[1]	381	417
Provision for taxes on income		69	67
Net income before allocation to noncontrolling interests		312	350
Less: Net loss attributable to noncontrolling interests		0	(2)
Net income attributable to Zoetis Inc.		$ 312	$ 352
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)		$ 0.65	$ 0.72
Diluted (in dollars per share)		$ 0.65	$ 0.72
Weighted-average common shares outstanding:
Basic (in shares)		479.6	485.9
Diluted (in shares)		483.1	489.8
Dividends paid per common share (in dollars per share)		$ 0.164	$ 0.126

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