Financial Information by Segment (Schedule of Income (Loss) Before Taxes for Unallocated and Other) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Segment Reporting Information [Line Items]
Interest expense	$ (15)		$ (11)		$ (47)		$ (30)
Total certain items, pre-tax			(2)		3		(2)
Equity in earnings of affiliated companies	3		4		9		8
Income from continuing operations before income taxes and equity in earnings of affiliated companies	73	[1]	78	[1]	150	[1]	209	[1]
Unallocated and Other [Member]
Segment Reporting Information [Line Items]
Interest expense	(15)		(11)		(47)		(30)
Total certain items, pre-tax	(4)	[2],[3]	(7)	[2],[3]	(44)	[2],[3]	(21)	[2],[3]
Equity in earnings of affiliated companies	(3)	[4]	(4)	[4]	(9)	[4]	(8)	[4]
Unallocated corporate costs	(13)	[5]	(12)	[5]	(42)	[5]	(44)	[5]
General unallocated (expense) income	(3)	[6]	3	[6]	2	[6]	(1)	[6]
Income from continuing operations before income taxes and equity in earnings of affiliated companies	$ (38)	[1]	$ (31)	[1]	$ (140)	[1]	$ (104)	[1]

[1] Income (loss) from continuing operations before taxes that are categorized as Unallocated and Other includes:

[2] (c) Unallocated corporate costs are not controlled by the operating segments and primarily benefit corporate interests.

[3] (a) Certain items are items that management does not consider to be representative of operating segment results and they are, therefore, excluded from Segment EBIT. Certain items, pre-tax, for the three months ended June 30, 2013 include $5 million related to global restructuring activities and $2 million for acquisition-related charges (consisting of $2 million for certain other one-time integration costs) offset by $3 million of foreign currency gain on revaluation of the GAM Notes. Certain items, pre-tax, for the nine months ended June 30, 2013 include $30 million related to global restructuring activities and $18 million for acquisition-related charges (consisting of $7 million for certain other one-time integration costs and $11 million of charges related to acquisition accounting adjustments for the acquired inventory) offset by $4 million of foreign currency gain on revaluation of the GAM Notes. Certain items, pre-tax, for the three months ended June 30, 2012 include $2 million related to global restructuring activities and $5 million for acquisition-related charges. Certain items, pre-tax, for the nine months ended June 30, 2012 include $14 million related to global restructuring activities, $5 million for acquisition-related charges and $2 million for environmental and legal reserves.

[4] Equity in earnings of affiliated companies is included in Segment EBIT and is removed from Unallocated and other to reconcile to income (loss) from operations before taxes.

[5] (c) Unallocated corporate costs are not controlled by the operating segments and primarily benefit corporate interests.

[6] (d) General unallocated (expense) income consists of gains (losses) arising from foreign currency transactions, net of other foreign currency risk management activities, the impact of accounting for certain inventory on a LIFO basis, and the profit or loss related to the corporate adjustment for unearned revenue.