Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Reserves and accrued expenses	$ 156.5	$ 121.5
Inventories	4.5	5.1
Net operating loss carryforwards	67.9	71.8
R&D credits	6.1	9.6
Valuation allowance	(26.4)	(25.7)
Outside basis difference on investments held for sale	2.7	0.0
Total deferred tax assets	211.3	182.3
Deferred tax liabilities:
Reserves and accrued expenses	14.3	39.6
Amortizable intangible assets	1,043.0	935.9
Plant and equipment	6.6	5.7
Accrued tax on unremitted foreign earnings	16.3	0.0
Outside basis difference on investments held for sale	10.0	0.0
Total deferred tax liabilities	$ 1,090.2	$ 981.2