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Inventories (Notes)
6 Months Ended
Mar. 31, 2024
Inventory [Abstract]  
Inventories INVENTORIES
March 31,
2024
September 30,
2023
Raw materials and supplies$60.2 $60.4 
Work in process0.1 0.1 
Finished products133.8 133.8 
   Inventories$194.1 $194.3