Restructuring (Tables)

6 Months Ended

Mar. 31, 2019

Restructuring And Related Activities [Abstract]

Recorded Restructuring Activities

Cabot’s restructuring activities were recorded in the Consolidated Statements of Operations in the three and six months ended March 31, 2019 and 2018 as follows:

	Three Months Ended March 31					Six Months Ended March 31
	2019		2018			2019		2018
	(In millions)
Cost of sales	$	2	$	(10	)	$	5	$	(9	)
Selling and administrative expenses		—		1			6		1
Total	$	2	$	(9	)	$	11	$	(8	)

Restructuring Activities and Related Reserves

Details of all restructuring activities and the related reserves during the three and six months ended March 31, 2019 were as follows:

	Severance and Employee Benefits			Environmental Remediation		Asset Impairment and Accelerated Depreciation			Other			Total
	(In millions)
Reserve at September 30, 2018	$	1		$	4	$	—		$	—		$	5
Charges		7			—		1			1			9
Costs charged against assets / (liabilities)		—			1		(1	)		—			—
Cash paid		(1	)		—		—			(1	)		(2	)
Reserve at December 31, 2018		7			5		—			—			12
Charges (gain)		1			—		—			1			2
Costs charged against assets / (liabilities)		—			—		—			—			—
Cash paid		(1	)		—		—			(1	)		(2	)
Reserve at March 31, 2019	$	7		$	5	$	—		$	—		$	12