Recent Accounting Pronouncements Recent Accounting Pronouncements (Impact of Adoption - ASU 2014-09) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales	$ 2,420.5	$ 3,303.0
Income tax (benefit) provision	128.3	596.3
Net earnings (loss) attributable to Viatris Inc. common shareholders	399.2	(1,037.6)
Revenues	4,191.7	$ 4,430.3
Prepaid expenses and other current assets	1,763.6		$ 1,957.6
Income taxes payable	177.8		236.9
Retained earnings	3,941.5		3,688.8
Accumulated other comprehensive loss	$ (2,061.0)		$ (1,744.3)