v3.25.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Apr. 23, 2025
Jun. 30, 2024
Document Information [Line Items]      
Document Type 10-K/A    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag true    
Amendment Flag false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Information [Line Items]      
Entity Registrant Name VIATRIS INC.    
Entity Central Index Key 0001792044    
Entity File Number 001-39695    
Entity Tax Identification Number 83-4364296    
Entity Incorporation, State or Country Code DE    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Public Float     $ 12,661,582,065
Entity Contact Personnel [Line Items]      
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    
Entity Phone Fax Numbers [Line Items]      
City Area Code 724    
Local Phone Number 514-1800    
Entity Listings [Line Items]      
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol VTRS    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   1,185,856,452