Goodwill and Intangible Assets

6 Months Ended

Mar. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

E. 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 six months ended March 31, 2021 are as follows:

	Reinforcement Materials		Performance Chemicals		Total
	(In millions)
Balance at September 30, 2020	$	46	$	88	$	134
Foreign currency impact		2		3		5
Balance at March 31, 2021	$	48	$	91	$	139

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

	March 31, 2021							September 30, 2020
	Gross Carrying Value		Accumulated Amortization			Net Intangible Assets		Gross Carrying Value		Accumulated Amortization			Net Intangible Assets
	(In millions)
Intangible assets with finite lives
Developed technologies	$	62	$	(10	)	$	52	$	60	$	(8	)	$	52
Trademarks		11		(1	)		10		11		(1	)		10
Customer relationships		59		(18	)		41		56		(15	)		41
Total intangible assets	$	132	$	(29	)	$	103	$	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 approximately eighteen years. Amortization expense for each of the three months ended March 31, 2021 and 2020 was $2 million and is included in Cost of sales, Selling and administrative expenses and Research and technical expenses in the Consolidated Statements of Operations. Amortization expense for the six months ended March 31, 2021 and 2020 was $4 million and $3 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.