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
Mar. 30, 2013
Mar. 31, 2012
Marketable Debt Instruments [Member]
   
Schedule Of Trading Securities And Other Trading Assets [Line Items]    
Trading Securities, Change in Unrealized Holding Gain (Loss) $ (163) $ (20)
Net gains (losses) on derivatives related to trading securities $ 164 $ 28