Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets:
Reserves and accruals	$ 76.9	$ 30.8
Bad debts	12.0	3.3
Inventory reserve	12.3	4.2
Postretirement benefits - pensions	62.6	19.3
Tax loss carryforwards	102.7	28.4
Deferred taxes recorded in other comprehensive income	18.0	0.0
Foreign tax credit carryforwards	74.6	52.2
Other	13.5	1.0
Total deferred tax assets	372.6	139.2
Valuation allowance	(141.3)	(67.9)
Deferred Tax Liabilities:
LIFO inventory	(25.1)	(9.3)
Property, plant and equipment	(60.7)	(15.5)
Intangibles	(972.6)	(280.9)
Unremitted foreign earnings	(32.5)	(7.8)
Deferred taxes recorded in other comprehensive income	0.0	(4.1)
Other	0.0	(1.8)
Total deferred tax liabilities	(1,090.9)	(319.4)
Net deferred income tax liability	$ (859.6)	$ (248.1)