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Net Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Net Property, Plant and Equipment    
Property, plant and equipment $ 1,868.7us-gaap_PropertyPlantAndEquipmentGross $ 1,661.2us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation (630.5)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (593.8)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Net property, plant and equipment 1,238.2us-gaap_PropertyPlantAndEquipmentNet 1,067.4us-gaap_PropertyPlantAndEquipmentNet
Land    
Net Property, Plant and Equipment    
Property, plant and equipment 50.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember		 50.9us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
Buildings    
Net Property, Plant and Equipment    
Property, plant and equipment 386.0us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember		 396.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
Equipment    
Net Property, Plant and Equipment    
Property, plant and equipment 1,008.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember		 957.0us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
Construction in progress    
Net Property, Plant and Equipment    
Property, plant and equipment $ 423.9us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember		 $ 257.1us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember