Goodwill and Intangible Assets (Tables)

9 Months Ended

Jun. 30, 2016

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 nine month period ended June 30, 2016 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		(2	)		—		—		(2	)
Balance at June 30, 2016	$	53		$	9	$	90	$	152

Schedule of Intangible Assets

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

	June 30, 2016							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	$	47	$	(3	)	$	44	$	48	$	(1	)	$	47
Trademarks		16		(1	)		15		16		—			16
Customer relationships		91		(8	)		83		96		(6	)		90
Total intangible assets	$	154	$	(12	)	$	142	$	160	$	(7	)	$	153