Operating Cash Flow (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
OPERATING ACTIVITIES
Net income	$ 14	$ 234	$ 87	$ 250
Less: Income (loss) from discontinued operations, net of tax	(2)	(3)	(1)	(4)
Income from continuing operations	16	237	88	254
Adjustments to income from continuing operations to arrive at cash provided by operating activities:
Depreciation and amortization			49	50
Restructuring costs	9	0	15	3
Loss on debt extinguishment			20	21
Gain on sale of property			(3)	0
Equity in earnings of ZF Meritor	0	$ (190)	0	(190)
Equity in earnings of other affiliates	$ (10)		(28)	(28)
Pension and retiree medical expense			20	30
Other adjustments to income from continuing operations			8	7
Dividends received from equity method investments			26	28
Pension and retiree medical contributions			(36)	(31)
Restructuring payments			(10)	(6)
Changes in off-balance sheet accounts receivable factoring			94	(27)
Changes in assets and liabilities, excluding effects of acquisitions, divestitures, foreign currency adjustments and discontinued operations			(111)	3
Operating cash flows provided by continuing operations			132	114
Operating cash flows used for discontinued operations			(10)	(11)
CASH PROVIDED BY OPERATING ACTIVITIES			$ 122	$ 103