Restructuring (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended				1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended		12 Months Ended			12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012 Maximum [Member]	Mar. 31, 2012 Closure Of Hong Kong [Member] Person	Sep. 30, 2012 Closure Of Hong Kong [Member]	Sep. 30, 2012 Closure Of Hong Kong [Member] Maximum [Member]	Sep. 30, 2012 Closure Of Hong Kong [Member] Other Post Closing Costs [Member]	Feb. 28, 2011 Closure Of Grigno [Member] Person	Sep. 30, 2012 Closure Of Grigno [Member]	Sep. 30, 2012 Closure Of Grigno [Member] Maximum [Member]	Sep. 30, 2012 Closure Of Thane [Member]	Sep. 30, 2010 Closure Of Thane [Member] Person	Sep. 30, 2012 Closure Of Thane [Member] Maximum [Member]	Sep. 30, 2012 Closure Of Thane [Member] Other Post Closing Costs [Member]	Sep. 30, 2012 Closure Of Thane [Member] Demolition And Site Clearing Costs [Member]	Sep. 30, 2012 2009 Global Restructuring [Member] Person	Sep. 30, 2009 2009 Global Restructuring [Member] Facility	Sep. 30, 2012 2009 Global Restructuring [Member] Other Post Closing Costs [Member]	Sep. 30, 2012 2009 Global Restructuring [Member] Demolition And Site Clearing Costs [Member]	Sep. 30, 2012 Other Activity [Member]	Sep. 30, 2011 Other Activity [Member]
Restructuring Cost and Reserve [Line Items]
Affected employees					64				37				120				400
Pre-tax charge to earnings						$ 10						$ 24					$ 124
Restructuring charges	15	18	46			6		2		5					2	3			17	7
Expected cumulative net cash outlays related to plan						3						8					72
Severance costs						1				3		7					55				1	5
Cash payments							1			1		8					71				5
Expected cash outlays remainder fiscal year						3								1			1				1
Restructuring costs in accrued expenses	5	11	19			1								1			3				1
Restructuring accelerated depreciation and asset impairments										3		12					45
Gain on sale of facility	191									1
Other costs										1
Proceeds from sale of business	181									2
Expected cash outlays beyond fiscal year											1
Accrued severance costs				$ 1
Number of facilities closed																		3