Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Feb. 11, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-35797
Entity Registrant Name	Zoetis Inc.
Entity Incorporation, State or Country Code	DE
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
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	ZTS
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 88,374
Entity Common Stock, Shares Outstanding		471,970,580
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001555280
Amendment Flag	false