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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Jun. 30, 2014
Inventory, Net [Abstract]    
Raw materials and supplies $ 140.8us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves $ 122.3us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves
Work in process 414.6us-gaap_InventoryWorkInProcessNetOfReserves 393.9us-gaap_InventoryWorkInProcessNetOfReserves
Finished and purchased products 201.7crs_InventoryFinishedGoodsAndPurchasedPartsNetOfReserves 183.0crs_InventoryFinishedGoodsAndPurchasedPartsNetOfReserves
Total inventory $ 757.1us-gaap_InventoryNet $ 699.2us-gaap_InventoryNet