v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Aug. 01, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-37686  
Entity Registrant Name BEONE MEDICINES LTD.  
Entity Incorporation, State or Country Code V8  
Entity Tax Identification Number 98-1209416  
Entity Address, Street Address c/o BeOne Medicines I GmbH  
Entity Address, Street Address Two Aeschengraben 27  
Entity Address, City Basel, Switzerland  
Entity Address, Postal Zip Code 4051  
City Area Code 61  
Local Phone Number 685 19 00  
Title of each class American Depositary Shares, each representing 13 Ordinary Shares, par value $0.0001 per share  
Trading Symbol(s) ONC  
Name of each exchange on which registered NASDAQ  
Entity Common Stock, Shares Outstanding   1,430,372,987
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001651308  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2