Consolidated Statements of Equity - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment
Balance at Dec. 31, 2018	$ 12,167.1	$ 0.0	$ 6.0	$ 8,591.4	$ 6,010.7	$ 3.6	$ (999.7)	$ (1,441.3)	$ (3.6)
Balance (in shares) at Dec. 31, 2018			539,289,665				23,490,867
Net earnings	16.8				16.8
Other comprehensive loss, net of tax	(352.3)							(352.3)
Share-based compensation expense	56.8			56.8
Issuance of restricted stock and stock options exercised, net	8.2		$ 0.1	8.1
Issuance of restricted stock and stock options exercised, net (in shares)			1,457,206
Taxes related to the net share settlement of equity awards	(12.8)			(12.8)
Cancellation of restricted stock							(1,107,207)
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	(669.9)				(669.9)
Other comprehensive loss, 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)
Cancellation of restricted stock			(24,598,074)				(24,598,074)
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)
Stock Issued During Period, Value, New Issues	0.0		$ 5.2	(5.2)
Issuance of common stock to Mylan N.V. shareholders (in shares)			541,619,673
Issuance of common stock for the Combination	10,727.5		$ 6.9	10,720.6
Issuance of common stock for the Combination (in shares)			689,874,045
Retirement of Mylan N.V. treasury stock, net	0.0			(999.7)			$ 999.7
Balance at Dec. 31, 2020	22,954.1		$ 12.1	18,438.8	5,361.2		$ 0.0
Balance (in shares) at Dec. 31, 2020			1,206,895,644				0
Net earnings	(1,269.1)				(1,269.1)
Other comprehensive loss, net of tax	(886.3)							(886.3)
Share-based compensation expense	111.2			111.2
Issuance of restricted stock and stock options exercised, net (in shares)			2,611,819
Taxes related to the net share settlement of equity awards	(13.9)			(13.9)
Cash dividends declared, $0.33 per common share					(403.3)
Balance at Dec. 31, 2021	$ 20,492.7		$ 12.1	$ 18,536.1	$ 3,688.8		$ 0.0	$ (1,744.3)
Balance (in shares) at Dec. 31, 2021			1,209,507,463				0