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	Jun. 30, 2012	Sep. 24, 2011
Instruments designated as accounting hedges:
Notional Principal - Foreign exchange contracts	$ 33,892	$ 13,705
Credit Risk Amounts - Foreign exchange contracts	569	537
Instruments not designated as accounting hedges:
Notional Principal - Foreign exchange contracts	10,637	9,891
Credit Risk Amounts - Foreign exchange contracts	$ 40	$ 56