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Summary of Significant Accounting Policies - Property, Plant and Equipment Summary (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 654.1us-gaap_PropertyPlantAndEquipmentGross $ 690.6us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation (298.5)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (279.0)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, plant and equipment, net 355.6us-gaap_PropertyPlantAndEquipmentNet 411.6us-gaap_PropertyPlantAndEquipmentNet
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 243.5us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
270.8us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Land and buildings    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 247.1us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandAndBuildingMember
261.9us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandAndBuildingMember
Computer equipment and software    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 69.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember
72.3us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 54.9us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
56.7us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 39.4us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
$ 28.9us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember