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Inventories (Notes)
6 Months Ended
Mar. 31, 2022
Inventory [Abstract]  
Inventories INVENTORIES
March 31,
2022
September 30,
2021
Raw materials and supplies$38.5 $34.0 
Work in process0.1 0.1 
Finished products106.1 83.8 
   Inventories$144.7 $117.9