Restructuring (Tables)

12 Months Ended

Sep. 30, 2013

Restructuring And Related Activities [Abstract]

Recorded Restructuring Activities

Cabot’s restructuring activities were recorded in the Consolidated Statements of Operations as follows:

	Years Ended September 30
	2013		2012		2011
	(Dollars in millions)
Cost of sales	$	28	$	13	$	16
Selling and administrative expenses		7		2		2
Research and technical expenses		2		—		—
Total	$	37	$	15	$	18

Restructuring Activities and Related Reserves

Details of these restructuring activities and the related reserves for fiscal 2013 and 2012 were as follows:

	Severance and Employee Benefits			Environmental Remediation			Asset Impairment and Accelerated Depreciation			Asset Sales			Other			Total
	(Dollars in millions)
Reserve at September 30, 2011	$	9		$	—		$	—		$	—		$	2		$	11
Charges		3			3			7			(1	)		3			15
Costs charged against assets		—			—			(7	)		(3	)		—			(10	)
Proceeds from sale		—			—			—			4			—			4
Cash paid		(10	)		(2	)		—			—			(2	)		(14	)
Foreign currency translation adjustment		—			—			—			—			(1	)		(1	)
Reserve at September 30, 2012	$	2		$	1		$	—		$	—		$	2		$	5
Charges		13			1			19			—			4			37
Costs charged against assets		—			—			(19	)		—			(2	)		(21	)
Cash paid		(8	)		—			—			—			(3	)		(11	)
Reserve at September 30, 2013	$	7		$	2		$	—		$	—		$	1		$	10