Property, Plant, and Equipment - Components of Property, Plant, and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	$ 6,833.6	$ 6,691.1
Less accumulated depreciation	(3,726.4)	(3,582.5)
Total	3,107.2	3,108.6
Land and Land Improvements
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	167.7	161.9
Buildings
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	812.0	795.5
Machinery and Equipment
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	5,603.6	5,481.6
Construction in Progress
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	172.2	176.7
Other
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	$ 78.1	$ 75.4