| Document and Entity Information | Oct. 03, 2019 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Oct. 3, 2019 |
| Entity Registrant Name | Zoetis Inc. |
| Entity Central Index Key | 0001555280 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | ZTS |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
