Recent Accounting Pronouncements Recent Accounting Pronouncements (Impact of Adoption - ASU 2014-09) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales	$ 2,159.4	$ 2,186.9
Income tax provision	90.7	98.0
Net earnings attributable to Viatris Inc. common shareholders	113.9	224.7
Revenues	3,663.4	$ 3,729.1
Prepaid expenses and other current assets	1,933.3		$ 2,028.1
Income taxes payable	148.4		226.8
Retained earnings	4,607.5		4,639.7
Accumulated other comprehensive loss	$ (2,941.0)		$ (2,747.4)