Goodwill and Intangible Assets (Tables)

3 Months Ended

Dec. 31, 2015

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, 2015 are as follows:

	Reinforcement Materials			Performance Chemicals		Purification Solutions		Total
	(Dollars in millions)
Balance at September 30, 2015	$	55		$	9	$	90	$	154
Foreign currency impact		(1	)		—		—		(1	)
Balance at December 31, 2015	$	54		$	9	$	90	$	153

Schedule of Intangible Assets

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

	December31, 2015							September 30, 2015
	Gross Carrying Value		Accumulated Amortization			Net Intangible Assets		Gross Carrying Value		Accumulated Amortization			Net Intangible Assets
	(Dollars in millions)
Intangible assets with finite lives
Developed technologies	$	48	$	(2	)	$	46	$	48	$	(1	)	$	47
Trademarks		15		—			15		16		—			16
Customer relationships		95		(7	)		88		96		(6	)		90
Total intangible assets	$	158	$	(9	)	$	149	$	160	$	(7	)	$	153