Balance Sheet Accounts - Schedule of Property, Plant and Equipment, net (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 979.5	$ 963.0
Less: accumulated depreciation	(621.7)	(604.0)
Property, plant and equipment, net	357.8	359.0
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	71.2	71.2
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	377.4	368.3
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	492.5	493.2
Construction-in-Progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 38.4	$ 30.3