Financial Information by Segment - Schedule of Income (Loss) from Continuing Operations before Taxes for Unallocated and Other (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Restructuring charges	$ 4	$ 5	$ 24	$ 29
Acquisition costs			1
Certain Item [Member]
Segment Reporting Information [Line Items]
Restructuring charges	3	5	24	29
Acquisition costs		2	5	18
One-time integration costs			3	7
Acquisition of accounting adjustments for acquired inventory			2	11
Foreign currency exchange rate, re measurement income (loss)	(3)	3	(3)	4
Reserve for legal and environmental matters	1		16
Non-cash gain on acquisition	$ 29		$ 29