Goodwill and Intangible Assets (Tables)

3 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Goodwill Balances

The carrying amount of goodwill attributable to each reportable segment with goodwill balances and the changes in those balances during the three month period ended December 31, 2017 are as follows:

	Reinforcement Materials			Performance Chemicals		Purification Solutions		Total
	(In millions)
Balance at September 30, 2017	$	53		$	9	$	92	$	154
Goodwill acquired(1)		—			31		—		31
Foreign currency impact		(2	)		1		—		(1	)
Balance at December 31, 2017	$	51		$	41	$	92	$	184

⁽¹⁾ Consists of goodwill acquired in the acquisition of Tech Blend as described in Note C.

Schedule of Intangible Assets

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

	December 31, 2017							September 30, 2017
	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)	$	72	$	(7	)	$	65	$	49	$	(7	)	$	42
Trademarks(1)		18		(2	)		16		16		(1	)		15
Customer relationships(1)		98		(15	)		83		94		(14	)		80
Total intangible assets	$	188	$	(24	)	$	164	$	159	$	(22	)	$	137

⁽¹⁾ The changes in the gross carrying value of the Developed technologies, Trademarks, and Customer relationships intangible assets are primarily due to the acquisition of Tech Blend as described in Note C.