Property, Plant, and Equipment - Components of Property, Plant, and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	$ 7,117.0	$ 6,997.8
Less accumulated depreciation	(4,002.3)	(3,846.1)
Property, plant, and equipment, net	3,114.7	3,151.7
Land and Land Improvements
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	177.5	177.5
Buildings
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	845.1	837.4
Machinery and Equipment
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	5,793.7	5,727.4
Construction in Progress
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	214.5	174.0
Other
Property, Plant, And Equipment [Line Items]
Property, plant and equipment, at cost	$ 86.2	$ 81.5