INVESTMENTS IN NON-CONSOLIDATED JOINT VENTURES (Details)	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Schedule of Equity Method Investments [Line Items]
Non-consolidated joint ventures and related direct ownership interest	100.00%
Meritor WABCO Vehicle Control Systems (Commercial Truck & Industrial)
Schedule of Equity Method Investments [Line Items]
Non-consolidated joint ventures and related direct ownership interest	50.00%	50.00%	50.00%
Master Sistemas Automotivos Ltda. (Commercial Truck & Industrial)
Schedule of Equity Method Investments [Line Items]
Non-consolidated joint ventures and related direct ownership interest	49.00%	49.00%	49.00%
Sistemas Automotrices de Mexico S.A. de C.V. (Commercial Truck & Industrial)
Schedule of Equity Method Investments [Line Items]
Non-consolidated joint ventures and related direct ownership interest	50.00%	50.00%	50.00%
Ege Fren Sanayii ve Ticaret A.S. (Commercial Truck & Industrial)
Schedule of Equity Method Investments [Line Items]
Non-consolidated joint ventures and related direct ownership interest	49.00%	49.00%	49.00%
Automotive Axles Limited (Commercial Truck & Industrial)
Schedule of Equity Method Investments [Line Items]
Non-consolidated joint ventures and related direct ownership interest	36.00%	36.00%	36.00%
ZF Meritor LLC (Commercial Truck & Industrial)
Schedule of Equity Method Investments [Line Items]
Non-consolidated joint ventures and related direct ownership interest	0.00%	50.00%	50.00%