Cover [Abstract] Document Type Amendment Flag Entity Registrant Name Entity Central Index Key Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Income Statement [Abstract] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Pro Forma [Member] PRO FORMA COMBINED [Member] Scenario, Adjustment [Member] TRANSACTION ACCOUNTING ADJUSTMENTS [Member] Scenario, Adjustment [Member] Statement [Line Items] Operating Expenses [Abstract] Operating expenses: Research and Development Expense Research and development General and Administrative Expense General and administrative Operating Expenses Total operating expenses Net Income (Loss) Attributable to Parent Net loss Preferred Stock Dividends, Income Statement Impact Deemed dividend Operating Income (Loss) Loss from operations Other Nonoperating Income (Expense) [Abstract] Other (income) expense: Change In Fair Value Of Tranche Liability Change in fair value of Series A tranche liability Change in fair value of tranche liability. Nonoperating Income (Expense) Total other (income) expense Other Nonoperating Income (Expense) Other (income) expense Interest Expense, Related Party Interest expense—related party Change In Fair Value Of Notes And Derivative Related Party Change in fair value of notes and derivative—related party Change in fair value of notes and derivative related party. Change In Fair Value Of Bridge Loan Notes Change in fair value of 2020 bridge loan notes Change in fair value of bridge loan notes. Net Income (Loss) Available to Common Stockholders, Basic Net loss attributable to common shareholders Earnings Per Share, Basic Net loss per share attributable to common shareholders, basic Earnings Per Share, Diluted Net loss per share attributable to common shareholders, diluted Weighted Average Number of Shares Outstanding, Basic Shares used to compute basic net loss per share attributable to common shareholders Weighted Average Number of Shares Outstanding, Diluted Shares used to compute diluted net loss per share attributable to common shareholders Legal Entity [Axis] Entity [Domain] Adjustment of Oppilan Pharma, Ltd [Member] OPPILAN PHARMA, LTD [Member] Adjustment of oppilan pharma, ltd. Adjustment of Zomagen Biosciences, Ltd [Member] ZOMAGEN BIOSCIENCES, LTD [Member] Adjustment of zomagen biosciences, ltd. Adjustment of Ventyx Biosciences, Inc [Member] VENTYX BIOSCIENCES, INC [Member] Adjustment of ventyx biosciences,inc. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Description of the Zomagen and Oppilan acquisition Basis of presentation [Abstract] Basis of Accounting [Text Block] Basis of presentation Business Combination Purchase Price [Abstract] Business Combination Purchase Price Disclosure NA Transaction Accounting Adjustments [Abstract] Transaction Accounting Adjustments [Abstract] Transaction accounting adjustments. Transaction Accounting Adjustments Disclosure [Text Block] Transaction accounting adjustments Transaction accounting adjustments disclosure. Summary of Components of Business Combination Purchase Price Summary of Components of Business Combination Purchase Price Summary of Components of Business Combination Purchase Price. Organization Consolidation And Presentation Of Financial Statements Disclosure [Table] Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] Proceeds from Issuance of Convertible Preferred Stock Proceeds from Issuance of Convertible Preferred Stock Number of Businesses Acquired Number of businesses acquired Common Stock, Shares, Issued Common stock, shares, issued Ventyx common shares issued Sale of Stock, Number of Shares Issued in Transaction Sale of stock, number of shares issued in transaction Outstanding options to purchase shares of Ventyx common stock Equity Interest Type [Axis] Equity Interest Issued or Issuable, Type [Domain] Second Tranche [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Zomagen [Member] Zomagen [Member] Oppilan [Member] Oppilan [Member] Class of Stock [Axis] Class of Stock [Domain] Series A1 Convertible Preferred Stock [Member] Series A Convertible Preferred Stock [Member] Business Combination Purchase Price [Table] Business Acquisition [Line Items] Common Stock, Par or Stated Value Per Share Ventyx's share value Common Stock, Par or Stated Value Per Share Common Stock, Value, Issued Common stock, value, issued Business Combination Transaction Fees Transaction fees Business Combination Transaction Fees. Business Combination, Consideration Transferred Total purchase price Sale of Stock, Price Per Share Ventyx's option value Sale of Stock, Price Per Share Sale of Stock, Consideration Received on Transaction Sale of Stock, Consideration Received on Transaction Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Stock consideration Transaction Accounting Adjustments [Table] Transaction Accounting Adjustments [Table] Transaction accounting adjustments. Transaction Accounting Adjustments [Line Items] Transaction Accounting Adjustments [Line Items] Transaction accounting adjustments. Change in Fair Value of Related Party Notes Change in fair value of related party notes Change in fair value of related party notes. Interest Expense Reversal Interest expense—related party Interest expense reversal. Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Two Thousand Twenty Bridge Notes [Member] 2020 Bridge Notes [Member] 2020 bridge notes.