OPERATING CASH FLOWS AND OTHER SUPPLEMENTAL FINANCIAL INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Operating Cash Flow Disclosure [Abstract]
NET INCOME (LOSS)	$ (22)	$ 14	$ 43	$ 30	$ 4	$ 234	$ 3	$ 13	$ 65	$ 254	$ (20)
Less: Loss from discontinued operations, net of tax									(1)	(30)	(7)
Income (loss) from continuing operations									66	284	(13)
Adjustments to income (loss) from continuing operations to arrive at cash provided by (used for) operating activities:
Depreciation and amortization									65	67	67
Deferred income tax benefit									(24)	(2)	(4)
Restructuring costs									16	10	23
Repurchase of convertible notes									25	31	24
Goodwill and asset impairment charges									17	0	0
Equity in earnings of other ZF Meritor									0	190	0
Equity in earnings of affiliates									(39)	(38)	(42)
Stock compensation expense									10	8	5
Provision for doubtful accounts									2	0	3
Pension and retiree medical expense									82	25	151
Gain on sale of equity investment									0	0	(125)
Gain on sale of property									(3)	0	0
Dividends received from ZF Meritor									0	190	0
Dividends received from other equity method investments									32	36	30
Pension and retiree medical contributions									(141)	(177)	(153)
Restructuring payments									(16)	(10)	(23)
Changes in off-balance sheet receivable securitization and factoring programs									39	(46)	43
Changes in assets and liabilities, excluding effects of acquisitions, divestitures, foreign currency adjustments and discontinued operations:
Receivables									54	34	(87)
Inventories									4	(9)	18
Accounts payable									(70)	(5)	(31)
Other current assets and liabilities									(52)	19	37
Other assets and liabilities									40	0	(1)
Operating cash flows provided by (used for) continuing operations									107	227	(78)
Operating cash flows used for discontinued operations									(10)	(12)	(18)
CASH PROVIDED BY (USED FOR) OPERATING ACTIVITIES									$ 97	$ 215	$ (96)