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Inventories
12 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Inventories
4. Inventories

Inventories consisted of the following:

September 30,
(in millions)20212020
Raw materials and supplies$750 $530 
Work-in-process29 22 
Finished goods197 133 
Inventories$976 $685