Accumulated Other Comprehensive Income (Loss) ("AOCI")

3 Months Ended

Dec. 31, 2024

Stockholders' Equity Note [Abstract]

Accumulated Other Comprehensive Income (Loss) ("AOCI")

E. Accumulated Other Comprehensive Income (Loss) (“AOCI”)

Comprehensive income combines net income (loss) and other comprehensive income items, which are reported as components of stockholders’ equity in the accompanying Consolidated Balance Sheets.

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

	Currency Translation Adjustment			Pension and Other Post-retirement Benefit Liability Adjustments			Total
	(In millions)
Balance at September 30, 2024, attributable to Cabot Corporation	$	(342	)	$	(18	)	$	(360	)
Other comprehensive income (loss) before reclassifications		(104	)		—			(104	)
Amounts reclassified from AOCI		—			—			—
Less: Other comprehensive income (loss) attributable to    noncontrolling interests		(7	)		—			(7	)
Balance at December 31, 2024, attributable to Cabot Corporation	$	(439	)	$	(18	)	$	(457	)

	Currency Translation Adjustment			Pension and Other Post-retirement Benefit Liability Adjustments			Total
	(In millions)
Balance at September 30, 2023, attributable to Cabot Corporation	$	(353	)	$	(9	)	$	(362	)
Other comprehensive income (loss) before reclassifications		62			—			62
Amounts reclassified from AOCI		(1	)		—			(1	)
Less: Other comprehensive income (loss) attributable to    noncontrolling interests		4			—			4
Balance at December 31, 2023, attributable to Cabot Corporation	$	(296	)	$	(9	)	$	(305	)

For both three months ended December 31, 2024 and 2023, the Company reclassified $1 million of gain associated with net investment hedges and $1 million and nil, respectively, of losses excluded from net investment hedges effectiveness testing out of AOCI and into interest expense on the Consolidated Statements of Operations.