Other Current Liabilities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014
Other Current Liabilities Disclosure [Abstract]
Compensation and benefits	$ 111	$ 146
Income taxes	9	8
Taxes other than income taxes	44	50
Accrued interest	15	15
Product warranties	23	27	24
Environmental reserves (see Note 19)	9	12
Restructuring (see Note 6)	10	9	7
Asbestos-related liabilities (see Note 19)	17	17
Indemnity obligations (see Note 19)	2	11
Other	41	56
Other current liabilities	$ 281	$ 351