Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Net sales	$ 3,569.0	$ 3,785.9	$ 6,812.2	$ 7,439.4
Other revenues	13.1	10.7	24.2	20.6
Total revenues	3,582.1	3,796.6	6,836.4	7,460.0
Cost of sales	2,249.2	2,351.2	4,342.3	4,510.6
Gross profit	1,332.9	1,445.4	2,494.1	2,949.4
Operating expenses:
Research and development	218.8	204.1	440.8	403.8
Acquired IPR&D	0.0	(7.8)	10.0	(1.7)
Selling, general and administrative	928.7	1,037.0	1,876.8	2,054.5
Impairment of goodwill	0.0	321.0	2,936.8	321.0
Litigation settlements and other contingencies, net	(47.6)	131.0	(121.1)	207.8
Total operating expenses	1,099.9	1,685.3	5,143.3	2,985.4
Earnings (loss) from operations	233.0	(239.9)	(2,649.2)	(36.0)
Interest expense	116.6	145.8	232.1	284.2
Other expense (income), net	333.5	6.1	432.8	(133.0)
Loss before income taxes	(217.1)	(391.8)	(3,314.1)	(187.2)
Income tax (benefit) provision	(212.5)	(65.4)	(267.5)	25.3
Net loss	$ (4.6)	$ (326.4)	$ (3,046.6)	$ (212.5)
Loss per share attributable to Viatris Inc. shareholders
Basic (in USD per share)	$ 0	$ (0.27)	$ (2.58)	$ (0.18)
Diluted (in USD per share)	$ 0	$ (0.27)	$ (2.58)	$ (0.18)
Weighted average shares outstanding:
Basic (in shares)	1,173.0	1,191.1	1,182.7	1,193.1
Diluted (in shares)	1,173.0	1,191.1	1,182.7	1,193.1