Other (Income)/Deductions - Net (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Royalty-related income		$ (1)	$ (5)
Interest income		(6)	(10)
Foreign currency loss	[1]	5	0
Other, net		(1)	1
Other (income)/deductions—net		(20)	(14)
Reconciling Items | Zoetis Initiatives
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net (gain)/loss on sale of assets	[2]	$ (17)	$ 0

[1] Primarily driven by costs related to hedging and exposures to certain emerging and developed market currencies.

[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.