Property, Plant, and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Property, Plant, and Equipment
Property, plant and equipment, gross	$ 1,126.2	$ 1,061.0
Accumulated depreciation	(542.8)	(513.7)
Property, plant, and equipment, net	583.4	547.3
Land
Property, Plant, and Equipment
Property, plant and equipment, gross	60.5	37.1
Buildings and leasehold improvements
Property, Plant, and Equipment
Property, plant and equipment, gross	315.2	284.6
Machinery and equipment
Property, Plant, and Equipment
Property, plant and equipment, gross	721.8	690.7
Projects in progress
Property, Plant, and Equipment
Property, plant and equipment, gross	$ 28.7	$ 48.6