Condensed Consolidated Statements Of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net earnings attributable to Viatris Inc. common shareholders	$ 331.6	$ 354.3	$ 820.3	$ 1,067.4
Other Comprehensive Income (Loss), before Tax [Abstract]
Foreign currency translation adjustment	(350.8)	(1,163.0)	(559.6)	(2,782.1)
Change in unrecognized loss and prior service cost related to defined benefit plans	(4.9)	(1.2)	(10.4)	(3.3)
Net unrealized loss on marketable securities	(1.3)	(0.8)	(0.2)	(3.5)
Other Comprehensive Income (Loss), before Tax, Total	(161.4)	(772.6)	(414.0)	(1,793.0)
Income tax provision	41.5	87.3	33.3	221.8
Other Comprehensive Income (Loss), Net of Tax, Total	(202.9)	(859.9)	(447.3)	(2,014.8)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	128.7	(505.6)	373.0	(947.4)
Cash Flow Hedging
Other Comprehensive Income (Loss), before Tax [Abstract]
Net unrecognized gain (loss) on derivatives	8.8	15.7	48.4	33.5
Net Investment Hedging
Other Comprehensive Income (Loss), before Tax [Abstract]
Net unrecognized gain (loss) on derivatives	$ 186.8	$ 376.7	$ 107.8	$ 962.4