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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 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Segment Reporting Information [Line Items]        
Interest expense $ (14) $ (14) $ (28) $ (29)
Global restructuring activities (5) (2) (13) (11)
Unallocated and Other [Member]        
Segment Reporting Information [Line Items]        
Interest expense (14) (14) (28) (29)
Unallocated corporate costs (12) (13) (22) (25)
General unallocated income (expense)   1 (1) 3
Less: Equity in earnings of affiliated companies, net of tax 1   1  
Income from continuing operations before income taxes and equity in earnings of affiliated companies (83) (63) (119) (98)
Certain Items [Member]        
Segment Reporting Information [Line Items]        
Legal and environmental matters and reserves (51) (1) (50) (1)
Global restructuring activities (5) (2) (13) (11)
Employee benefit plan settlements (1)   (3) 3
Acquisition and integration-related charges (1) (1) (2) (4)
Indirect tax settlement credits 3   3  
Other   (2) (1) (3)
Total certain items, pre-tax (56) (37) (67) (47)
Certain Items [Member] | Equity Affiliate Investment [Member]        
Segment Reporting Information [Line Items]        
Investment impairment charge   (11)   (11)
Certain Items [Member] | Specialty Fluids [Member]        
Segment Reporting Information [Line Items]        
Loss on sale and asset impairment charges $ (1) $ (20) $ (1) $ (20)