Cover Page - € / shares	3 Months Ended
	Mar. 31, 2021	May 06, 2021	Dec. 31, 2020
Cover [Abstract]
Entity Address, Address Line One	1000 Mylan Boulevard
Title of 12(b) Security	Common Stock, par value $0.01 per share
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-4364296
Entity File Number	001-39695
Entity Registrant Name	VIATRIS INC.
Document Type	10-Q
Document Period End Date	Mar. 31, 2021
Entity Filler Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Ordinary Shares, Shares Outstanding		1,208,655,503
Common Stock, Par or Stated Value Per Share	€ 0.01		€ 0.01
Trading Symbol	VTRS
Security Exchange Name	NASDAQ
Entity Address, City or Town	Canonsburg
Entity Address, Postal Zip Code	15317
City Area Code	(724)
Local Phone Number	514-1800
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Central Index Key	0001792044
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Address, State or Province	PA