Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2019	$ 11,883.8	$ 6.1	$ 8,643.5	$ 6,031.1	$ (999.7)	$ (1,797.2)
Balance (in shares) at Dec. 31, 2019		540,746,871			24,598,074
Net earnings (loss)	(669.9)			(669.9)
Other comprehensive earnings, net of tax	939.2					939.2
Share-based compensation expense	79.2		79.2
Issuance of restricted stock and stock options exercised, net	0.6		0.6
Issuance of restricted stock and stock options exercised, net (in shares)		872,802
Taxes related to the net share settlement of equity awards	(6.3)		(6.3)
Exchange of Mylan N.V. ordinary shares for Viatris Inc. common stock	0.0	$ (6.1)	6.1
Exchange of Mylan N.V. ordinary shares for Viatris Inc. common stock (in shares)		(541,619,673)
Issuance of common stock to Mylan N.V. shareholders	0.0	$ 5.2	(5.2)
Issuance of common stock to Mylan N.V. shareholders (in shares)		541,619,673
Issuance of common stock	10,727.5	$ 6.9	10,720.6
Issuance of common stock (in shares)		689,874,045
Retirement of Mylan N.V. treasury stock, net	0.0		(999.7)		$ 999.7
Retirement of Mylan N.V. treasury stock, net (in shares)		(24,598,074)			(24,598,074)
Balance at Dec. 31, 2020	22,954.1	$ 12.1	18,438.8	5,361.2	$ 0.0	(858.0)
Balance (in shares) at Dec. 31, 2020		1,206,895,644			0
Net earnings (loss)	(1,269.1)			(1,269.1)
Other comprehensive earnings, net of tax	(886.3)					(886.3)
Share-based compensation expense	111.2		111.2
Taxes related to the net share settlement of equity awards	(13.9)		(13.9)
Issuance of restricted stock, net (in shares)		2,611,819
Cash dividends declared	(403.3)			(403.3)
Balance at Dec. 31, 2021	20,492.7	$ 12.1	18,536.1	3,688.8	$ 0.0
Balance (in shares) at Dec. 31, 2021		1,209,507,463			0
Net earnings (loss)	2,078.6			2,078.6
Other comprehensive earnings, net of tax	(1,016.9)					(1,016.9)
Share-based compensation expense	116.4		116.4
Taxes related to the net share settlement of equity awards	(11.6)		(11.6)
Issuance of common stock	3.3		3.3
Issuance of common stock (in shares)		313,341
Issuance of restricted stock, net	1.6		1.6
Issuance of restricted stock, net (in shares)		3,972,427
Cash dividends declared	(591.8)			(591.8)
Balance at Dec. 31, 2022	$ 21,072.3	$ 12.1	$ 18,645.8	$ 5,175.6	$ 0.0	$ (2,761.2)
Balance (in shares) at Dec. 31, 2022		1,213,793,231			0