Income Taxes (Components of Deferred Income Taxes) (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Income Taxes [Line Items]
Property, plant & equipment	$ 140	$ 73
Pension and other benefits	94	87
Environmental liabilities	2	3
Inventory	12	12
Deferred expenses	12	11
State taxes	5
Net operating loss carry-forwards	194	125
Other tax carry-forwards	73	137
Other	45	28
Subtotal	577	476
Valuation allowances	(169)	(138)
Total deferred tax assets	408	338
Property, plant & equipment	191	28
Intangible assets	107
Pension and other benefits	15	2
Unremitted earnings of non-U.S. subsidiaries	11	18
Inventory	10	3
Other	10	5
Total deferred tax liabilities	$ 344	$ 56