Property, Plant and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Property, plant and equipment
Property, plant and equipment, gross	$ 5,158.4		$ 5,158.4		$ 5,033.2
Less accumulated depreciation	(2,675.0)		(2,675.0)		(2,602.5)
Net property, plant and equipment	2,483.4		2,483.4		2,430.7
Depreciation expense	62.1	$ 59.1	121.0	$ 118.2
Land
Property, plant and equipment
Property, plant and equipment, gross	63.8		63.8		64.6
Buildings
Property, plant and equipment
Property, plant and equipment, gross	986.7		986.7		973.4
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	3,744.3		3,744.3		3,612.5
Construction-in-progress
Property, plant and equipment
Property, plant and equipment, gross	$ 363.6		$ 363.6		$ 382.7