Inventories

12 Months Ended

Sep. 30, 2020

Inventory Disclosure [Abstract]

Inventories

Note E. Inventories

Inventories, net of obsolete, unmarketable and slow moving reserves, are as follows:

	September 30
	2020		2019
	(In millions)
Raw materials	$	82	$	107
Finished goods		225		305
Other(1)		52		54
Total	$	359	$	466

⁽¹⁾            Other inventory is comprised of certain spare parts and supplies.

Cabot periodically reviews inventory for both obsolescence and loss of value. In this review, Cabot makes assumptions about the future demand for and market value of the inventory and, based on these assumptions, estimates the amount of obsolete, unmarketable or slow moving inventory. At September 30, 2020 and 2019, total inventory reserves were $28 million and $29 million, respectively.