Quarterly report pursuant to Section 13 or 15(d)

Cash and Investments, Trading Assets (Detail)

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Cash and Investments, Trading Assets (Detail) (Marketable Debt Instruments [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Jun. 29, 2013
Jun. 30, 2012
Marketable Debt Instruments [Member]
       
Schedule Of Trading Securities And Other Trading Assets [Line Items]        
Trading Securities, Change in Unrealized Holding Gain (Loss) $ 50 $ (37) $ (32) $ (28)
Net gains (losses) on derivatives related to trading securities $ (50) $ 43 $ 34 $ 43