Notional Principal Amounts of Outstanding Derivative Instruments and Credit Risk Amounts of Associated with Outstanding or Unsettled Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Sep. 24, 2011
Instruments qualifying as accounting hedges:
Notional Principal - Foreign exchange contracts	$ 12,323	$ 13,705
Credit Risk Amounts - Foreign exchange contracts	415	537
Instruments other than accounting hedges:
Notional Principal - Foreign exchange contracts	15,988	9,891
Credit Risk Amounts - Foreign exchange contracts	$ 85	$ 56