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Inventories (Tables)
3 Months Ended
Dec. 31, 2023
Inventory [Abstract]  
Inventories
December 31,
2023
September 30,
2023
Raw materials and supplies$59.5 $60.4 
Work in process0.1 0.1 
Finished products128.0 133.8 
   Inventories$187.6 $194.3