Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Sep. 30, 2022

Stockholders Equity Note [Abstract]

Accumulated Other Comprehensive Income (Loss)

Note O. Accumulated Other Comprehensive Income (Loss)

Changes in each component of AOCI, net of tax, are as follows for fiscal 2021 and 2022:

	Currency Translation Adjustment			Pension and Other Postretirement Benefit Liability Adjustment			Total
	(In millions)
Balance at September 30, 2020 attributable to    Cabot Corporation	$	(307	)	$	(44	)	$	(351	)
Other comprehensive income (loss) before reclassifications		52			20			72
Amounts reclassified from AOCI		(3	)		—			(3	)
Less: Other comprehensive income (loss) attributable to    noncontrolling interests		7			—			7
Balance at September 30, 2021 attributable to    Cabot Corporation		(265	)		(24	)		(289	)
Other comprehensive income (loss) before reclassifications		(208	)		12			(196	)
Amounts reclassified from AOCI		29			2			31
Less: Other comprehensive income (loss) attributable to    noncontrolling interests		(15	)		—			(15	)
Balance at September 30, 2022 attributable to    Cabot Corporation	$	(429	)	$	(10	)	$	(439	)

The amounts reclassified out of AOCI and into the Consolidated Statements of Operations for fiscal 2022, 2021 and 2020 are as follows:

	Affected Line Item in the Consolidated	Years Ended September 30
	Statements of Operations	2022			2021			2020
		(In Millions)
Derivatives: net investment hedges
(Gains) losses reclassified to interest    expense	Interest expense	$	(6	)	$	(5	)	$	(5	)
(Gains) losses excluded from effectiveness    testing and amortized to interest expense	Interest expense		2			2			2
Release of current translation adjustment	Loss on sale of business and asset impairment charge		33			—			—
Pension and other postretirement benefit    liability adjustment
Release of actuarial losses and prior service cost (credits)	Loss on sale of business and asset impairment charge		2			—			—
Amortization of actuarial losses and prior service cost (credit)	Net Periodic Benefit Cost - see Note M for details		1			3			3
Settlement and curtailment loss (gain)	Net Periodic Benefit Cost - see Note M for details		(1	)		5			4
Total before tax		$	31		$	5		$	4