Financial Information by Segment - Schedule of Income (Loss) from Continuing Operations before Income Taxes and Equity in Earnings of Affiliated Companies for Unallocated and Other (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Interest expense	$ (19)	$ (24)	$ (62)	$ (69)
Gain on sale of land				1
Loss on sale of business				(3)
Unallocated and Other [Member]
Segment Reporting Information [Line Items]
Interest expense	(19)	(24)	(62)	(69)
Unallocated corporate costs	(16)	(11)	(51)	(42)
General unallocated income (expense)	6	3	34	9
Less: Equity in earnings of affiliated companies, net of tax	2	1	5	4
Income from continuing operations before income taxes and equity in earnings of affiliated companies	(33)	(34)	(140)	(113)
Certain Items [Member]
Segment Reporting Information [Line Items]
Global restructuring activities (Note H)	(1)		(13)
Acquisition and integration-related charges		(1)		(2)
Legal and environmental matters and reserves			(1)	(2)
Gain on sale of land				1
Loss on sale of business				(3)
Other	1		1	(1)
Total certain items	(2)	$ (1)	(56)	$ (7)
Certain Items [Member] | Argentina [Member]
Segment Reporting Information [Line Items]
Controlled currency devaluation and other losses	$ (2)		$ (43)