Inventories (Tables)

9 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Summary of inventories

Inventories are stated at the lower of cost (using FIFO or average methods) or net realizable value (determined on the basis of estimated realizable values) and are summarized as follows (in millions):

	June 30, 2018		September 30, 2017
Finished goods	$	172	$	139
Work in process	36		34
Raw materials, parts and supplies	258		205
Total	$	466	$	378