Segment Information Selected Statement of Income Narrative (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue		$ 1,534	$ 1,455
Contingent payment received related to sale of certain U.S. manufacturing sites		20
Inventory Adjustments			68
Provision		3
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	[1]	728	718
International | Operating Segments | Euro Member Countries, Euro
Segment Reporting Information [Line Items]
Revenue		170	181
Zoetis Initiatives | Reconciling Items
Segment Reporting Information [Line Items]
Restructuring and Other Cost Productivity Charges			2
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	[2]	(17)	0
CEO Transition Costs [Member]
Segment Reporting Information [Line Items]
Restructuring and Other Cost Productivity Charges		4
CHINA
Segment Reporting Information [Line Items]
Revenue		66	60
Employee Termination Costs
Segment Reporting Information [Line Items]
Employee termination costs	[3]	$ (3)	$ (4)

[1] Revenue denominated in euros was $170 million and $181 million for the three months ended March 31, 2020 and March 31, 2019, respectively.

[2] For the three months ended March 31, 2020, represents a net gain resulting from net cash proceeds received pursuant to an agreement related to the 2016 sale of certain U.S. manufacturing sites.

[3] The restructuring charges for the three months ended March 31, 2020 primarily relate to CEO transition-related costs which are associated with Manufacturing/research/corporate.The restructuring charges for the three months ended March 31, 2019 primarily relate to the acquisition of Abaxis which are associated with Manufacturing/research/corporate.