v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 04, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Document Transition Report false  
Entity File Number 001-42938  
Entity Central Index Key 0002044725  
Entity Registrant Name Evommune, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 85-0742575  
Entity Address, Address Line One 1891 Page Mill Road  
Entity Address, City or Town Palo Alto  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94304  
City Area Code 925  
Local Phone Number 247-4481  
Title of 12(b) Security Common stock, par value $0.0001 per share  
Trading Symbol EVMN  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Filer Category Non-accelerated Filer  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   36,292,113
Document Quarterly Report true