Contingencies (Details Textuals) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) site claim	Sep. 30, 2013 USD ($)	Jun. 30, 2015 USD ($) site claim	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($) claim	Sep. 30, 2009 USD ($)
Loss Contingencies [Line Items]
Environmental accrual balance	$ 17		$ 17		$ 19
Discounted amount environmental accrual for ongoing operations maintenance and monitoring	8		8
Undiscounted amount environmental accrual for ongoing operations maintenance and monitoring	8		8
Maremont Asbestos
Loss Contingencies [Line Items]
Environmental accrual balance	$ 75		$ 75		$ 76
Number of pending claims | claim	5,600		5,600		5,700
Obligation period for asbestos personal injury claims			10 years
Estimated insurance recoveries	$ 43		$ 43		$ 49
Pending and future claims	73		73		73
Rockwell Asbestos
Loss Contingencies [Line Items]
Environmental accrual balance	$ 50		$ 50		$ 50
Number of pending claims | claim	3,000		3,000		2,800
Obligation period for asbestos personal injury claims			10 years
Estimated insurance recoveries	$ 11		$ 11		$ 11
Pending and future claims	$ 48		$ 48		48
Superfund Sites
Loss Contingencies [Line Items]
Number of Superfund environmental sites | site	9		9
Environmental costs reasonably possible	$ 17		$ 17
Environmental accrual balance	2		2		2
Non-Superfund Sites
Loss Contingencies [Line Items]
Environmental costs reasonably possible	34		34
Environmental accrual balance	15		$ 15		17
Maremont Asbestos
Loss Contingencies [Line Items]
Obligation period for asbestos personal injury claims			10 years
Range of possible loss, minimum	73		$ 73
Range of possible loss, maximum	105		105
Rockwell Asbestos
Loss Contingencies [Line Items]
Range of possible loss, minimum	48		48
Range of possible loss, maximum	62		62
Insurance Receivables | Rockwell Asbestos
Loss Contingencies [Line Items]
Estimated insurance recoveries	8		8		8
Indemnity Obligations
Loss Contingencies [Line Items]
Guarantee obligations recorded	13		13		14	$ 28
Body Systems
Loss Contingencies [Line Items]
Increased liability					6
Indemnity obligations liability					2
Gain related to litigation settlement	6
MSSC
Loss Contingencies [Line Items]
Indemnity obligations liability	2		2		5
Potential Product Performance Issue
Loss Contingencies [Line Items]
Range of possible loss, minimum		$ 12		$ 12
Range of possible loss, maximum	$ 3	20	$ 3	20	3
Loss contingency accrual, provision				$ 12
Non-cash cost recovery		$ 5
Low Range
Loss Contingencies [Line Items]
Site contingency, accrual, discount rate	0.50%		0.50%
High Range
Loss Contingencies [Line Items]
Site contingency, accrual, discount rate	2.50%		2.50%
Tax Years 2008 Through 2014 | Value Added Tax
Loss Contingencies [Line Items]
Increased liability	$ 10		$ 10		$ 11