Supplementary Financial Statement Information - Property, Plant and Equipment (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 5,871.9	$ 5,943.9
Less accumulated depreciation	(3,991.8)	(3,931.6)
Property, plant and equipment, net	1,880.1	2,012.3
Capitalized interest on capital projects	2.7	2.5	6.7
Asset retirement obligations	5.6	5.4
Land, land improvements and leaseholds [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	249.5	239.8
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	403.7	428.3
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	5,178.0	5,224.4
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 40.7	$ 51.4