Accumulated Other Comprehensive Income (Loss) (“AOCI”) (Tables)

3 Months Ended

Dec. 31, 2021

Equity [Abstract]

Changes in Each Component of AOCI, Net of Tax

Changes in each component of AOCI, net of tax, were as follows:

	Currency Translation Adjustment			Pension and Other Postretirement Benefit Liability Adjustments			Total
	(In millions)
Balance at September 30, 2021, attributable to Cabot Corporation	$	(265	)	$	(24	)	$	(289	)
Other comprehensive income (loss) before reclassifications		(28	)		1			(27	)
Amounts reclassified from AOCI		(1	)		—			(1	)
Less: Other comprehensive income (loss) attributable to    noncontrolling interests		2			—			2
Balance at December 31, 2021, attributable to Cabot Corporation	$	(296	)	$	(23	)	$	(319	)

Amounts Reclassified Out of AOCI

The amounts reclassified out of AOCI and into the Consolidated Statements of Operations in each of the three months ended December 31, 2021 and 2020 were as follows:

	Affected Line Item in the Consolidated	Three Months Ended December 31
	Statements of Operations	2021			2020
		(In millions)
Derivatives: net investment hedges
(Gains) losses reclassified to interest    expense	Interest expense	$	(1	)	$	(1	)
Pension and other postretirement
Amortization of actuarial losses and prior service cost (credit)	Net Periodic Benefit Cost (Note E)		—			1
Settlement charge	Net Periodic Benefit Cost (Note E)		—			6
Total before tax		$	(1	)	$	6