Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets attributable to:
Accrued pension and other post-retirement benefits	$ 33.2	$ 34.1
Accrued expenses and accounts receivable allowances	15.8	15.4
Net operating loss carryforwards	2.5	4.7
Inventories	9.1	9.0
Stock-based compensation	6.5	6.8
Research and development credit carryforwards	2.2	2.1
Foreign tax credit carryforward	0.5	0.4
Total deferred tax assets	69.8	72.5
Valuation allowance	0.0	0.0
Deferred tax assets, net of valuation allowance	69.8	72.5
Deferred tax liabilities attributable to:
Liquidation of subsidiary for income tax purposes	13.3	13.3
Property, plant and equipment	10.9	9.7
Goodwill and amortization	14.6	13.4
Other	0.8	5.8
Deferred tax liabilities	39.6	42.2
Net deferred tax assets	$ 30.2	$ 30.3