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Superalloy Powders Technical Assistance and Powder Supply Agreements (Details) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Dec. 31, 2013
Dec. 31, 2014
Superalloy powders technical assistance and powder supply agreements    
Up-front license fee asset   $ 13.0crs_UpFrontLicenseFeeAsset
Other assets    
Superalloy powders technical assistance and powder supply agreements    
Up-front license fee asset   13.0crs_UpFrontLicenseFeeAsset
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Technical assistance agreement and a long-term powder supply agreement | UTC    
Superalloy powders technical assistance and powder supply agreements    
Superalloy powder facility construction period 18 months  
Superalloy powder facility construction costs $ 30crs_PlantSetUpCosts
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Term for minimum guaranteed purchase quantities of specified materials 12 years  
Technical assistance agreement and a long-term powder supply agreement | UTC | Maximum    
Superalloy powders technical assistance and powder supply agreements    
Superalloy powder supply term 20 years