Notional Principal Amounts of Outstanding Derivative Instruments and Credit Risk Amounts Associated with Outstanding or Unsettled Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2013	Sep. 28, 2013
Derivatives Designated as Hedging Instruments | Foreign exchange contracts
Derivative [Line Items]
Notional Principal	$ 23,553	$ 35,013
Credit Risk Amounts	331	159
Derivatives Designated as Hedging Instruments | Interest rate contract
Derivative [Line Items]
Notional Principal	3,000	3,000
Credit Risk Amounts	55	44
Not Designated as Hedging Instrument | Foreign exchange contracts
Derivative [Line Items]
Notional Principal	16,859	16,131
Credit Risk Amounts	$ 48	$ 25