Derivative Instruments - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Derivative [Line Items]
Total notional amount of pay-floating interest rate swaps	$ 5,600,000,000	$ 3,100,000,000
Hedging period for foreign currency transactions, maximum	4 years
Total notional amount of net foreign exchange cash flow hedges	4,300,000,000	4,600,000,000
Net deferred gain recorded in AOCI for contracts that will be reclassified to earnings in the next twelve months	64,000,000
Notional amount of foreign exchange contracts not designated as hedges and do not qualify for hedge accounting	4,300,000,000	4,100,000,000
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	124,000,000	82,000,000
Collateral Already Posted, Aggregate Fair Value	54,000,000	0
Interest Expense | Interest rate
Derivative [Line Items]
Realized benefit from derivative instruments	$ 80,000,000	$ 58,000,000	$ 66,000,000