Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Mar. 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 period ended March 31, 2015 are as follows:

	Reinforcement Materials			Performance Chemicals			Purification Solutions			Total
	(Dollars in millions)
Balance at September 30, 2014	$	68		$	10		$	458		$	536
Foreign currency impact		(8	)		(1	)		(19	)		(28	)
Balance at March 31, 2015	$	60		$	9		$	439		$	508

Schedule of Intangible Assets

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

	March 31, 2015							September 30, 2014
	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	$	146	$	(19	)	$	127	$	152	$	(16	)	$	136
Customer relationships		159		(20	)		139		171		(17	)		154
Total intangible assets, finite lives	$	305	$	(39	)	$	266	$	323	$	(33	)	$	290
Trademarks, indefinite lives		54		—			54		57		—			57
Total intangible assets	$	359	$	(39	)	$	320	$	380	$	(33	)	$	347