Balance Sheet Components (Property, Plant and Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,974.5	$ 4,002.2
Accumulated depreciation	1,804.3	1,663.1
Property, plant and equipment, net	2,170.2	2,339.1
Land and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	131.3	143.1
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,182.3	1,191.7
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,421.2	2,414.5
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 239.7	$ 252.9