RESTRUCTURING COSTS (Details Textuals) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended						12 Months Ended
	Nov. 12, 2012	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014 segment	Sep. 30, 2013 segment	Sep. 30, 2012	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		$ 11						$ 11	$ 12	$ 15	$ 19
Restructuring costs		7	2	1	12	11	3	10	23	39
Number of reportable segments	2							2	2
Restructuring costs and asset impairment charges									1	19
Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		11						11	12	15	19
Restructuring costs								10	18	18
Restructuring costs and asset impairment charges									0	0
Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs								8	17	36
Aftermarket & Trailer [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs								1	3	2
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs								1	3	1
South America Labor Reductions [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs									7
South America Labor Reductions [Member] | Hourly Positions [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
No. of Positions expected to be eliminated through Performance Plus Program restructuring actions in North America and Europe								190
South America Labor Reductions [Member] | Salaried Position [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
No. of Positions expected to be eliminated through Performance Plus Program restructuring actions in North America and Europe								20
Variable Labor Reductions [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Cost incurred to date									10
Restructuring costs									5	5
Variable Labor Reductions [Member] | Hourly Positions [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated									600
Variable Labor Reductions [Member] | Salaried Position [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated									120
Segment Reorganization and Asia-Pacific Realignment [Member] | Commercial Truck & Industrial [Member] | Employee Severance Charges and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs									8
Segment Reorganization and Asia-Pacific Realignment [Member] | Commercial Truck & Industrial [Member] | Lease Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs									2
Segment Reorganization and Asia-Pacific Realignment [Member] | Aftermarket & Trailer [Member] | Employee Severance Charges and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs									3
Segment Reorganization and Asia-Pacific Realignment [Member] | Corporate [Member] | Employee Severance Charges and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs									3
Segment Reorganization and Asia-Pacific Realignment [Member] | Hourly Positions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated									50
Segment Reorganization and Asia-Pacific Realignment [Member] | Salaried Position [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated									200
M2016 Footprint Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring period								3 years
M2016 Footprint Actions [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Cost incurred to date									2
Expected remaining cost for restructuring under Performance Plus Program		2						2
M2016 Footprint Actions [Member] | Hourly Positions [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated								74
M2016 Footprint Actions [Member] | Salaried Position [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated								27
Performance Plus Program [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring costs under Performance Plus Program										186
Cumulative restructuring costs under Performance Plus Program for discontinued operations										93
Performance Plus Program [Member] | Asset Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring costs under Performance Plus Program										41
Performance Plus Program [Member] | Employee Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring costs under Performance Plus Program										117
Performance Plus Program [Member] | Pension Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring costs under Performance Plus Program										28
Performance Plus Program [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs									24	16
Restructuring costs and asset impairment charges										19
Performance Plus Program [Member] | Commercial Truck & Industrial [Member] | Asset Impairment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs and asset impairment charges										17
Performance Plus Program [Member] | St Priest [Member] | Employee Severance Charges and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs										5
Performance Plus Program [Member] | Commercial Truck, Performance Plus [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring costs under Performance Plus Program										82
Performance Plus Program [Member] | Corporate Locations and Aftermarket and Trailer Segment [Member]
Restructuring Cost and Reserve [Line Items]
Cumulative restructuring costs under Performance Plus Program										11
Performance Plus Program [Member] | Salaried Position [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated								2,800
European Action [Member] | Commercial Truck & Industrial [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs										$ 7