Condensed Consolidated Statements Of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net earnings attributable to Viatris Inc. common shareholders	$ 264.0	$ 313.9	$ 488.7	$ 713.1
Other Comprehensive Income (Loss), before Tax [Abstract]
Foreign currency translation adjustment	(254.1)	(1,149.9)	(208.8)	(1,619.1)
Change in unrecognized (loss) gain and prior service cost related to defined benefit plans	(6.8)	0.5	(5.5)	(2.1)
Net unrealized gain (loss) on marketable securities	0.2	(1.0)	1.1	(2.7)
Other Comprehensive Income (Loss), before Tax, Total	(236.7)	(748.4)	(252.6)	(1,020.4)
Income tax provision (benefit)	4.3	89.8	(8.2)	134.5
Other Comprehensive Income (Loss), Net of Tax, Total	(241.0)	(838.2)	(244.4)	(1,154.9)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	23.0	(524.3)	244.3	(441.8)
Cash Flow Hedging
Other Comprehensive Income (Loss), before Tax [Abstract]
Net unrecognized gain (loss) on derivatives	36.8	17.6	39.6	17.8
Net Investment Hedging
Other Comprehensive Income (Loss), before Tax [Abstract]
Net unrecognized gain (loss) on derivatives	$ (12.8)	$ 384.4	$ (79.0)	$ 585.7