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Inventories (Tables)
12 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of (in millions):
 September 30,
 20212020
Finished goods$287.0 $243.0 
Work in process229.3 159.1 
Raw materials281.8 181.9 
Inventories$798.1 $584.0