Derivative Instruments - Additional information (Detail) (USD $)	3 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Oct. 01, 2011
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Total notional amount of pay-floating interest rate swaps	$ 2,200,000,000		$ 1,200,000,000
Total notional amount of net foreign exchange cash flow hedges	3,700,000,000		3,600,000,000
Notional amount of foreign exchange contracts not designated as hedges	2,700,000,000		2,600,000,000
Aggregate fair value of derivative instruments with credit-risk-related contingent features that are in a net liability position	103,000,000		114,000,000
Hedging period for foreign currency transactions, maximum	4 years
Net deferred gains recorded in AOCI for contracts that will mature in the next twelve months	46,000,000
Net gain on foreign exchange contracts not designated as hedge	54,000,000	20,000,000
Foreign exchange contract net loss	(66,000,000)	(25,000,000)
Notional amount of other derivatives not designated as hedges	$ 176,000,000		$ 184,000,000