Derivative Instruments - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Oct. 01, 2011
Derivative [Line Items]
Total notional amount of pay-floating interest rate swaps	$ 3,100,000,000		$ 3,100,000,000		$ 1,200,000,000
Hedging period for foreign currency transactions, maximum	4 years		4 years
Total notional amount of net foreign exchange cash flow hedges	5,200,000,000		5,200,000,000		3,600,000,000
Net deferred gains recorded in AOCI for contracts that will mature in next twelve months			120,000,000
Notional amount of foreign exchange contracts not designated as hedges	2,800,000,000		2,800,000,000		2,600,000,000
Net gains (losses) on foreign exchange contracts not designated as hedge	130,000,000	(62,000,000)	73,000,000	(127,000,000)
Net gains (losses) on related economic exposures of hedged item	(136,000,000)	63,000,000	(109,000,000)	119,000,000
Notional amount of other derivatives not designated as hedges					184,000,000
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a net liability position by counterparty	$ 21,000,000		$ 21,000,000		$ 114,000,000