Financial Information by Segment & Geographic Area (Schedule of Income (Loss) Before Taxes for Unallocated and Other) (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Restructuring charges	$ 15	$ 18	$ 46
Benefit from a legal judgment		3
Colombia [Member]
Charge related to change in net worth tax regulations		3
Certain Items [Member]
Restructuring charges	17
Acquisition related charges	26
Legal and professional fees	14
One time integration costs	3
Charges related to acquisition accounting adjustment	9
Environmental reserves and legal settlements	4
Reserve for respirator claim	4		2
Impairment of long-lived assets to be disposed of			2
2009 Global Restructuring [Member] | Certain Items [Member]
Restructuring charges			46
Environmental reserves and legal settlements			$ 3