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Inventories (Tables)
9 Months Ended
Jun. 30, 2023
Inventory [Abstract]  
Inventories
June 30,
2023
September 30,
2022
Raw materials and supplies$61.6 $58.3 
Work in process0.1 0.1 
Finished products174.5 141.4 
   Inventories$236.2 $199.8