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Financial Information by Segment & Geographic Area - 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
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Segment Reporting Information [Line Items]      
Interest expense $ (56) $ (49) $ (53)
Gain on bargain purchase of a business 24    
Gain on sale of land 17    
Unallocated and Other [Member]      
Segment Reporting Information [Line Items]      
Interest expense (56) (49) (53)
Unallocated corporate costs (59) (58) (41)
General unallocated income (expense) 1   (1)
Less: Equity in earnings of affiliated companies, net of tax 10 3 3
Income from continuing operations before income taxes and equity in earnings of affiliated companies (307) (144) (316)
Certain Items [Member]      
Segment Reporting Information [Line Items]      
Gain on bargain purchase of a business 24    
Gain on sale of land 17    
Employee benefit plan settlement and other charges 1 (4) (10)
Loss on sale and asset impairment charge (207)    
Legal and environmental matters and reserves (9) (25) (54)
Acquisition and integration-related charges (6) (5) (5)
Global restructuring activities (3) (11) (19)
Inventory reserve adjustment     (2)
Indirect tax settlement credits   12 3
Other certain items   (1) (1)
Total certain items, pre-tax (183) $ (34) (218)
Certain Items [Member] | Marshall Mine [Member]      
Segment Reporting Information [Line Items]      
Loss on sale and asset impairment charge     (129)
Certain Items [Member] | Specialty Fluids [Member]      
Segment Reporting Information [Line Items]      
Divestiture related benefit 5    
Loss on sale and asset impairment charge     $ (1)
Certain Items [Member] | Purification Solutions [Member]      
Segment Reporting Information [Line Items]      
Divestiture related charges $ (5)