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Property, Plant and Equipment (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Property, Plant and Equipment    
Property, plant and equipment, gross $ 1,300.4 $ 1,272.8
Accumulated depreciation (665.9) (635.7)
Property, plant and equipment, net 634.5 637.1
Land
   
Property, Plant and Equipment    
Property, plant and equipment, gross 48.7 45.8
Buildings and leasehold improvements
   
Property, Plant and Equipment    
Property, plant and equipment, gross 331.3 311.9
Machinery and equipment
   
Property, Plant and Equipment    
Property, plant and equipment, gross 875.0 845.2
Projects in progress
   
Property, Plant and Equipment    
Property, plant and equipment, gross $ 45.4 $ 69.9