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Inventories
6 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories are stated at the lower of cost (using FIFO or average methods) or market (determined on the basis of estimated realizable values) and are summarized as follows (in millions):
 
March 31,
2017
 
September 30,
2016
Finished goods
$
130

 
$
125

Work in process
30

 
26

Raw materials, parts and supplies
178

 
165

Total
$
338

 
$
316