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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Sep. 30, 2012
Inventories    
Finished goods $ 276.5 $ 262.5
Work in process 158.6 149.5
Raw materials, parts and supplies 211.5 207.0
Inventories $ 646.6 $ 619.0