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Document and Entity Information
Nov. 06, 2025
Cover [Abstract]  
Entity File Number 921-21
Amendment Flag false
Entity Central Index Key 0001159036
Document Type 8-K
Document Period End Date Nov. 06, 2025
Entity Registrant Name HALOZYME THERAPEUTICS, INC.
Entity Incorporation State Country Code DE
Entity Tax Identification Number 88-0488686
Entity Address, Address Line One 11388 Sorrento Valley Road
Entity Address, City or Town San Diego
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92121
City Area Code (858)
Local Phone Number 794-8889
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.001 par value
Trading Symbol HALO
Security Exchange Name NASDAQ
Entity Emerging Growth Company false