Income Taxes - Deferred Tax Asset and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Accruals and reserves	$ 15.7	$ 19.4
Pensions	2.6	2.9
Inventory	3.5	2.3
Share-based compensation	4.4	5.3
Tax credit carryforwards	10.6	15.5
Foreign net operating loss carryforwards	22.4	24.4
State net operating loss carryforwards	1.9	0.3
Capital loss carryover	0.0	29.4
Convertible notes	0.7	0.7
Operating leases	8.1	8.5
Other – net	7.4	5.5
Total deferred tax assets before valuation allowances	77.3	114.2
Valuation allowances	(33.9)	(68.2)
Total deferred tax assets, net of valuation allowances	43.4	46.0
Deferred tax liabilities:
Property, plant and equipment	27.8	22.2
Goodwill and intangible assets	69.1	74.9
Other – net	5.2	1.0
Total deferred tax liabilities	102.1	98.1
Net deferred tax liabilities	(58.7)	(52.1)
Other assets
Deferred tax liabilities:
Net deferred tax liabilities	(1.5)	0.0
Long-term deferred tax liabilities
Deferred tax liabilities:
Net deferred tax liabilities	$ (60.2)	$ (52.1)