Condensed Consolidated Statements Of Comprehensive Earnings (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net loss attributable to Viatris Inc. common shareholders	$ (4.6)	$ (326.4)	$ (3,046.6)	$ (212.5)
Other comprehensive earnings (loss), before tax:
Foreign currency translation adjustment	507.0	(89.7)	1,005.8	(432.2)
Change in unrecognized loss and prior service cost related to defined benefit plans	0.5	(5.6)	0.3	(11.8)
Net unrealized gain (loss) on available-for-sale fixed income securities	0.2	0.0	0.8	(0.3)
Other comprehensive earnings (loss), before tax	123.5	(18.2)	421.5	(169.4)
Income tax (benefit) provision	(83.0)	16.0	(127.0)	58.4
Other comprehensive earnings (loss), net of tax	206.5	(34.2)	548.5	(227.8)
Comprehensive earnings (loss)	201.9	(360.6)	(2,498.1)	(440.3)
Cash Flow Hedging
Other comprehensive earnings (loss), before tax:
Net unrecognized gain (loss) on derivatives	$ (29.0)	8.7	(56.5)	37.4
Net Investment Hedging
Other comprehensive earnings (loss), before tax:
Net unrecognized gain (loss) on derivatives		$ 68.4	$ (528.9)	$ 237.5