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		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Interest expense	$ (21)	$ (23)	$ (43)	$ (45)
Gain on sale of land				1
Loss on sale of business				(3)
Unallocated and Other [Member]
Segment Reporting Information [Line Items]
Interest expense	(21)	(23)	(43)	(45)
Unallocated corporate costs	(18)	(16)	(35)	(31)
General unallocated income (expense)	15	2	28	6
Less: Equity in earnings of affiliated companies, net of tax	2	1	3	3
Income from continuing operations before income taxes and equity in earnings of affiliated companies	(38)	(40)	(107)	(79)
Certain Items [Member]
Segment Reporting Information [Line Items]
Global restructuring activities (Note H)	(3)		(12)
Gain on sale of land				1
Legal and environmental matters and reserves	(1)	(1)	(1)	(2)
Acquisition and integration-related charges				(1)
Other		(1)		(1)
Total certain items	(12)	$ (2)	(54)	$ (6)
Certain Items [Member] | Argentina [Member]
Segment Reporting Information [Line Items]
Controlled currency devaluation and other losses	$ (8)		$ (41)