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Segment Results (Schedule Of Assets By Segment) (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets $ 3,387.3us-gaap_Assets $ 3,450.8us-gaap_Assets
Engineered Materials    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 1,202.5us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_PaymentandMerchandisingTechnologiesMember		 1,210.1us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_PaymentandMerchandisingTechnologiesMember
Merchandising Systems    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 520.7us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_AerospaceAndElectronicsMember		 512.1us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_AerospaceAndElectronicsMember
Engineered Materials    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 238.5us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_EngineeredMaterialsMember		 229.1us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_EngineeredMaterialsMember
Fluid Handling    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 905.3us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_FluidHandlingMember		 963.2us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= cr_FluidHandlingMember
Corporate    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets $ 520.4us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember		 $ 536.3us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember