Segment Information Selected Statement of Income Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue		$ 1,548	$ 1,547	$ 3,082		$ 3,002
Contingent payment received related to sale of certain U.S. manufacturing sites				20
Provision				5
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue		708	742	1,436	[1]	1,460	[1]
International | Operating Segments | Euro Member Countries, Euro
Segment Reporting Information [Line Items]
Revenue				331		365
Zoetis Initiatives
Segment Reporting Information [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal				(17)
Zoetis Initiatives | Reconciling Items
Segment Reporting Information [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	[2]	(1)	0	(18)		0
CEO Transition Costs
Segment Reporting Information [Line Items]
Restructuring and Other Cost Productivity Charges				9
CHINA
Segment Reporting Information [Line Items]
Revenue		66	56	132		116
Employee Termination Costs
Segment Reporting Information [Line Items]
Employee termination costs	[3]	$ (2)	$ (14)	$ (5)		$ (18)

[1] Revenue denominated in euros was $331 million and $365 million for the six months ended June 30, 2020 and June 30, 2019, respectively.

[2] For the six months ended June 30, 2020, primarily 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 and six months ended June 30, 2020 primarily relate to CEO transition-related costs which are associated with Manufacturing/research/corporate.The restructuring charges for the three and six months ended June 30, 2019 primarily relate to the acquisition of Abaxis which are associated with Manufacturing/research/corporate.