Restructuring (Tables)

12 Months Ended

Sep. 30, 2020

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
	2020		2019		2018
	(In millions)
Cost of sales	$	6	$	9	$	(31	)
Selling and administrative expenses		13		7		1
Total	$	19	$	16	$	(30	)

Restructuring Activities and Related Reserves

Details of all restructuring activities and the related reserves for fiscal 2018, 2019, and 2020 were as follows:

	Severance and Employee Benefits			Environmental Remediation and Decommissioning Activities			Non-Cash Asset Impairment and Accelerated Depreciation			Asset Sales			Other			Total
	(In millions)
Reserve at September 30, 2017	$	1		$	2		$	—		$	—		$	—		$	3
Charges (gain)		2			3			1			(38	)		2			(30	)
Costs charged against assets		—			—			(1	)		(1	)		—			(2	)
Cash (paid) received		(2	)		(1	)		—			39			(2	)		34
Reserve at September 30, 2018		1			4			—			—			—			5
Charges (gain)		11			—			2			—			3			16
Costs charged against liabilities		—			—			(2	)		—			—			(2	)
Cash paid		(9	)		—			—			—			(3	)		(12	)
Reserve at September 30, 2019		3			4			—			—			—			7
Charges (gain)		14			—			1			—			4			19
Costs charged against assets		—			—			(1	)		—			—			(1	)
Cash (paid) received		(12	)		—			—			—			(4	)		(16	)
Reserve at September 30, 2020	$	5		$	4		$	—		$	—		$	—		$	9