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Inventories (Tables)
6 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories consisted of the following (in millions):
 
March 31, 2019
 
September 30, 2018
 
 
 
 
Raw materials and supplies
$
687

 
$
606

Work-in-process
188

 
155

Finished goods
1,249

 
1,058

Inventories
$
2,124

 
$
1,819