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Inventories
3 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventories
4. Inventories

Inventories consisted of the following:

(in millions)December 31,
2021
September 30,
2021
Raw materials and supplies$733 $750 
Work-in-process27 29 
Finished goods182 197 
Inventories$942 $976