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Inventories
9 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Inventories
4. Inventories

Inventories consisted of the following:

(in millions)June 30,
2021
September 30,
2020
Raw materials and supplies$660 $530 
Work-in-process25 22 
Finished goods165 133 
Inventories$850 $685