Net Gains or Losses Recognized in Costs and Expenses on Economic Exposures Associated with Foreign Currency Exchange Rates (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 29, 2012		Oct. 01, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on the economic exposures related to foreign currency exchange contracts	$ (72)		$ (25)
Net gains (losses) on related foreign exchange contracts not designated as hedges	9		24
Net gains (losses) recognized in costs and expenses	$ (63)	[1]	$ (1)	[1]

[1] Gross gains or losses on exchange hedge contracts may include interest rate or other non-foreign currency related components which impact the fair value of the contracts, and which do not impact the foreign currency assets and liabilities which they are intended to offset