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Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2023
Feb. 23, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2023    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Trading Symbol PCVX    
Entity Registrant Name VAXCYTE, INC.    
Entity Central Index Key 0001649094    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Interactive Data Current Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
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 File Number 001-39323    
Entity Tax Identification Number 46-4233385    
Entity Address, Address Line One 825 Industrial Road    
Entity Address, Address Line Two Suite 300    
Entity Address, City or Town San Carlos    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94070    
City Area Code 650    
Local Phone Number 837-0111    
Entity Common Stock, Shares Outstanding   108,407,730  
Entity Public Float     $ 4.1
Document Annual Report true    
Document Transition Report false    
Entity Incorporation, State or Country Code DE    
Title of 12(b) Security Common Stock, $0.001 par value per share    
Security Exchange Name NASDAQ    
Documents Incorporated by Reference

Part III of this Annual Report on Form 10-K incorporates information by reference from the Registrant’s definitive proxy statement to be filed with the U.S. Securities and Exchange Commission pursuant to Regulation 14A, not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K, in connection with the Registrant’s 2024 annual meeting of stockholders.

    
Auditor Name Deloitte & Touche LLP    
Auditor Location San Francisco, California    
Auditor Firm ID 34    
Document Financial Statement Error Correction [Flag] false