Property, Plant, and Equipment, net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant, and Equipment
Property, plant and equipment, gross	$ 1,487.7	$ 1,244.9
Accumulated depreciation	(706.8)	(612.7)
Property, plant, and equipment, net	780.9	632.2
Capitalized interest	2.4	0.9	$ 1.0
Land
Property, Plant, and Equipment
Property, plant and equipment, gross	74.5	60.2
Buildings and leasehold improvements
Property, Plant, and Equipment
Property, plant and equipment, gross	389.1	342.5
Machinery and equipment
Property, Plant, and Equipment
Property, plant and equipment, gross	896.9	784.7
Projects in progress
Property, Plant, and Equipment
Property, plant and equipment, gross	$ 127.2	$ 57.5