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Inventories (Tables)
12 Months Ended
Sep. 30, 2025
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following (in millions):
 September 30,
 20252024
Raw materials and supplies$716 $765 
Work-in-process132 130 
Finished goods972 879 
Inventories$1,820 $1,774