| Document And Entity Information | Mar. 23, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 23, 2023 |
| Entity Registrant Name | VENTYX BIOSCIENCES, INC. |
| Entity Central Index Key | 0001851194 |
| Entity Emerging Growth Company | true |
| Securities Act File Number | 001-40928 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 83-2996852 |
| Entity Address, Address Line One | 662 Encinitas Blvd |
| Entity Address, Address Line Two | Suite 250 |
| Entity Address, City or Town | Encinitas |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92024 |
| City Area Code | 760 |
| Local Phone Number | 593-4832 |
| Entity Information, Former Legal or Registered Name | Not Applicable |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Ex Transition Period | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | VTYX |
| Security Exchange Name | NASDAQ |
