Property, Plant, and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment, at cost	$ 5,770.5		$ 5,714.8
Less accumulated depreciation	(2,952.6)		(2,882.7)
Property, plant, and equipment, net	2,817.9		2,832.1
Depreciation [Abstract]
Depreciation expense	80.7	$ 85.2
Incremental depreciation expense	0.1	$ 9.0
Purchases of property, plant, and equipment included in accounts payable	29.4		15.0
Land and Land Improvements
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment, at cost	146.2		146.4
Buildings
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment, at cost	641.3		640.9
Machinery and Equipment
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment, at cost	4,769.9		4,747.1
Construction in Progress
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment, at cost	148.3		119.1
Other
Property, Plant, and Equipment [Line Items]
Property, plant, and equipment, at cost	$ 64.8		$ 61.3