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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Sep. 30, 2012
Inventories    
Finished goods $ 259.4 $ 262.5
Work in process 162.6 149.5
Raw materials, parts and supplies 218.0 207.0
Inventories $ 640.0 $ 619.0