Income Taxes - Deferred Tax Asset and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Accruals and reserves	$ 15.9	$ 11.7
Pensions	3.3	2.0
Inventory	2.2	4.1
Share-based compensation	6.5	6.6
Tax credit carryforwards	16.2	16.4
Foreign net operating loss carryforwards	11.2	11.7
State net operating loss carryforwards	0.6	2.0
Deferred Tax Assets, Capital Loss Carryforwards	29.7	0.0
Other – net	13.5	0.2
Total deferred tax assets before valuation allowances	99.1	54.7
Valuation allowances	(65.2)	(26.8)
Total deferred tax assets, net of valuation allowances	33.9	27.9
Deferred tax liabilities:
Property, plant and equipment	15.4	15.0
Goodwill and intangible assets	88.9	71.4
Convertible notes	(0.4)	(0.5)
Other – net	1.6	4.1
Total deferred tax liabilities	105.5	90.0
Net deferred tax liabilities	71.6	62.1
Other assets	(4.8)	0.0
Long-term deferred tax liabilities	$ 76.4	$ 62.1