VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 6	$ 9	$ 7
Charged to costs and expenses	3	(2)	3
Other deductions	0	(1)	(1)
Ending balance	9	6	9
Deferred tax asset valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	1,030	1,166	1,204
Charged to costs and expenses	(47)	(89)	44
Other deductions	(22)	(47)	(82)
Ending balance	$ 961	$ 1,030	$ 1,166