Goodwill and Intangible Assets

12 Months Ended

Sep. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Note G. Goodwill and Intangible Assets

The carrying amount of goodwill attributable to each reportable segment with goodwill balances and the changes in those balances during the period ended September 30, 2021 are as follows:

	Reinforcement Materials		Performance Chemicals		Total ⁽¹⁾
	(In millions)
Balance at September 30, 2020	$	46	$	88		134
Foreign currency impact		2		4		6
Balance at September 30, 2021	$	48	$	92	$	140

⁽¹⁾

The balance as of September 30, 2020 and September 30, 2021 includes $444 million of accumulated impairment losses associated with the goodwill of Purification Solutions segment. There were no accumulated impairment losses associated with the goodwill of the Reinforcement Materials or Performance Chemicals segments.

The following table provides information regarding the Company’s intangible assets with finite lives:

	September 30, 2021							September 30, 2020
	Gross Carrying Value		Accumulated Amortization			Net Intangible Assets		Gross Carrying Value		Accumulated Amortization			Net Intangible Assets
	(In millions)
Developed technologies	$	62	$	(12	)	$	50	$	60	$	(8	)	$	52
Trademarks		11		(1	)		10		11		(1	)		10
Customer relationships		60		(20	)		40		56		(15	)		41
Total intangible assets	$	133	$	(33	)	$	100	$	127	$	(24	)	$	103

Intangible assets are amortized over their estimated useful lives, which range between ten and twenty-five years, with a weighted average amortization period of 17 years. Amortization expense for fiscal 2021, 2020 and 2019 was $8 million, $7 million and $6 million, respectively, and is included in Cost of sales, Selling and administrative expenses, and Research and technical expenses in the Consolidated Statements of Operations. Total amortization expense is estimated to be approximately $8 million each year for the next five fiscal years.