Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 11, 2021	Jun. 30, 2020
Cover [Abstract]
Document Annual Report	true
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Entity Registrant Name	Zoetis Inc.
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	ZTS
Security Exchange Name	NYSE
Entity Central Index Key	0001555280
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		475,166,373
Entity Interactive Data Current	Yes
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 65,094
Entity File Number	001-35797
Entity Tax Identification Number	46-0696167
Entity Address, Address Line One	10 Sylvan Way,
Entity Address, City or Town	Parsippany,
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07054
City Area Code	973
Local Phone Number	822-7000
Document Transition Report	false