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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, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Segment Reporting Information [Line Items]        
Interest expense $ (12) $ (13) $ (37) $ (41)
Global restructuring activities (4) (3) (8) (16)
Unallocated and Other [Member]        
Segment Reporting Information [Line Items]        
Interest expense (12) (13) (37) (41)
Unallocated corporate costs (14) (10) (43) (32)
General unallocated income (expense) 1 2 (4) 1
Less: Equity in earnings of affiliated companies, net of tax 2 1 3 2
Income from continuing operations before income taxes and equity in earnings of affiliated companies (22) (29) (94) (148)
Certain Items [Member]        
Segment Reporting Information [Line Items]        
Indirect tax settlement credits 12   12 3
Global restructuring activities (4) (3) (8) (16)
Employee benefit plan settlement and other charges (1) (2) (6) (5)
Acquisition and integration-related charges (2) (1) (4) (3)
Legal and environmental matters and reserves   (1)   (51)
Other     (1) (1)
Total certain items, pre-tax $ 5 $ (7) $ (7) (74)
Specialty Fluids [Member] | Certain Items [Member]        
Segment Reporting Information [Line Items]        
Loss on sale and asset impairment charge       $ (1)