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Inventories (Tables)
9 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following (in millions):
June 30, 2020September 30, 2019
Raw materials and supplies$661  $588  
Work-in-process157  176  
Finished goods1,178  1,050  
Inventories$1,996  $1,814