Goodwill and Intangible Assets

3 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

F. 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 three months ended December 31, 2021 are as follows:

	Reinforcement Materials		Performance Chemicals		Total
	(In millions)
Balance at September 30, 2021	$	48	$	92	$	140
Foreign currency impact		—		—		—
Balance at December 31, 2021	$	48	$	92	$	140

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

	December 31, 2021							September 30, 2021
	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⁽¹⁾	$	36	$	(7	)	$	29	$	62	$	(12	)	$	50
Trademarks⁽¹⁾		2		—			2		11		(1	)		10
Customer relationships		60		(21	)		39		60		(20	)		40
Total intangible assets	$	98	$	(28	)	$	70	$	133	$	(33	)	$	100

⁽¹⁾

Developed technologies intangible assets with a carrying value of $25 million and accumulated amortization of $5 million and trademark intangible assets with a carrying value of $8 million and accumulated amortization of $1 million related to the Purification Solutions business were classified as assets held for sale as of December 31, 2021.

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 seventeen years. Amortization expense was $2 million for each of the three months ended December 31, 2021 and 2020 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 $6 million each year for the next five fiscal years.