Income Taxes - Components of Deferred Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Deferred expenses	$ 29	$ 13
Other	28	36
Pension and other benefits	71	84
Net operating loss carry-forwards	187	194
Foreign tax credit carry-forwards	49	12
R&D credit carry-forwards	28	27
Other business credit carry-forwards	32	31
Subtotal	424	397
Valuation allowances	(166)	(169)
Total deferred tax assets	258	228
Intangible assets	(28)	(10)
Inventory		(2)
Property, plant and equipment	(149)	(141)
Unremitted earnings of non-U.S. subsidiaries		(11)
Total deferred tax liabilities	$ (177)	$ (164)