QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended			3 Months Ended	0 Months Ended	3 Months Ended			3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2014 ZF Meritor LLC [Member]	Jul. 30, 2013 Suspensys Sistemas Automotivos Ltda. [Member]	Sep. 30, 2013 Suspensys Sistemas Automotivos Ltda. [Member]	Jun. 30, 2013 Suspensys Sistemas Automotivos Ltda. [Member]	Sep. 30, 2012 Suspensys Sistemas Automotivos Ltda. [Member]	Jun. 30, 2013 Canadian Pension Plan Dispute [Member] claim	Sep. 30, 2014 Retiree Medical Plan [Member]
Restructuring charges	$ 7		$ 2	$ 1		$ 12	$ 11	$ 3	$ 10	$ 23	$ 39
Recognized prior service costs due to curtailment																		15
Restructuring reversal					3
Net income (loss)	3	234	1	11	41	(39)	(3)	(21)	249	(22)	52	209
Non-operating loss from the change in fair value of notes receivable					(73)												27
Pension plans settled during period																	5
Gain on sale of ownership in joint venture, net of tax													$ 92	$ 92
Company's overall ownership, as a percentage														50.00%	50.00%	50.00%