Other Current Liabilities (Details 1) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Total product warranties – beginning of period	$ 51	$ 57
Accruals for product warranties	11	14
Payments	(13)	(18)
Change in estimates and other	1	3
Total product warranties – end of period	50	56
Less: Non-current product warranties	(27)	(33)	$ (24)
Product warranties – current	$ 23	$ 23	$ 27