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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Interest expense	$ (13)	$ (13)	$ (39)	$ (40)
Global restructuring activities	(1)	(2)	(3)	(45)
Unallocated and Other [Member]
Segment Reporting Information [Line Items]
Interest expense	(13)	(13)	(39)	(40)
Unallocated corporate costs	(11)	(11)	(37)	(36)
General unallocated income (expense)	(4)	1		6
Less: Equity in earnings of affiliated companies, net of tax	3	1	6	2
Income from continuing operations before income taxes and equity in earnings of affiliated companies	(33)	(30)	(84)	(135)
Certain Item [Member]
Segment Reporting Information [Line Items]
Global restructuring activities	(1)	(2)	(3)	(45)
Non-recurring gains (losses) on foreign exchange	(1)		(1)	(11)
Legal and environmental matters and reserves		(1)	2	(4)
Executive transition costs		(3)		(3)
Total certain items, pre-tax	$ (2)	$ (6)	$ (2)	$ (63)