v3.26.1
Cover Page - € / shares
6 Months Ended
Jun. 30, 2026
Aug. 03, 2026
Dec. 31, 2025
Cover [Abstract]      
Document Type 10-Q    
Document Quarterly Report true    
Document Period End Date Jun. 30, 2026    
Document Transition Report false    
Entity File Number 001-39695    
Entity Registrant Name VIATRIS INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 83-4364296    
Entity Address, Address Line One 1000 Mylan Boulevard    
Entity Address, City or Town Canonsburg    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 15317    
City Area Code 724    
Local Phone Number 514-1800    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol VTRS    
Security Exchange Name NASDAQ    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filler Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Common Stock, Par or Stated Value Per Share € 0.01   € 0.01
Entity Common Stock, Shares Outstanding   1,148,590,864  
Entity Central Index Key 0001792044    
Amendment Flag false    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus Q2    
Current Fiscal Year End Date --12-31