Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2013

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 years ended September 30, 2013 and 2012 are as follows:

	Reinforcement Materials			Performance Materials		Advanced Technologies		Purification Solutions		Total
	(Dollars in millions)
Balance at September 30, 2011	$	27		$	11	$	2	$	—	$	40
Goodwill acquired		—			—		—		432		432
Foreign currency translation adjustment		1			—		—		7		8
Balance at September 30, 2012		28			11		2		439		480
Measurement period adjustments(1)		—			—		—		22		22
Foreign currency translation adjustment		(3	)		—		—		5		2
Balance at September 30, 2013	$	25		$	11	$	2	$	466	$	504

⁽¹⁾  Refer to Note C for further details related to the measurement period adjustments.

Schedule of Intangible Assets

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

	Years Ended September 30
	2013							2012
	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 technology	$	155	$	(9	)	$	146	$	151	$	(2	)	$	149
Customer relationships(1)		113		(7	)		106		121		(1	)		120
Other intangible assets		3		(2	)		1		6		(3	)		3
Total intangible assets, finite lives	$	271	$	(18	)	$	253	$	278	$	(6	)	$	272
Trademarks, indefinite lives		57		—			57		58		—			58
Total intangible assets	$	328	$	(18	)	$	310	$	336	$	(6	)	$	330

⁽¹⁾  The change in the gross carrying value of the Customer relationships intangible asset is primarily due to measurement period adjustments as described in Note C.