INVESTMENTS IN NON-CONSOLIDATED JOINT VENTURES (Details 2) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Equity in earnings of affiliates	$ 39	$ 38	$ 42
Commercial Truck & Industrial
Segment Reporting Information [Line Items]
Equity in earnings of affiliates	39	38	36
Aftermarket & Trailer
Segment Reporting Information [Line Items]
Equity in earnings of affiliates	$ 0	$ 0	$ 6