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Property, Plant and Equipment (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment    
Property, plant and equipment, gross $ 1,291.8 $ 1,272.8
Accumulated depreciation (650.3) (635.7)
Property, plant and equipment, net 641.5 637.1
Land
   
Property, Plant and Equipment    
Property, plant and equipment, gross 45.2 45.8
Buildings and leasehold improvements
   
Property, Plant and Equipment    
Property, plant and equipment, gross 313.3 311.9
Machinery and equipment
   
Property, Plant and Equipment    
Property, plant and equipment, gross 851.8 845.2
Projects in progress
   
Property, Plant and Equipment    
Property, plant and equipment, gross $ 81.5 $ 69.9