Quarterly report pursuant to Section 13 or 15(d)

Cash and Investments, Available-for-Sale Investments (Detail)

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Cash and Investments, Available-for-Sale Investments (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 02, 2016
Jun. 27, 2015
Jul. 02, 2016
Jun. 27, 2015
Dec. 26, 2015
Available-for-sale Securities [Abstract]          
Fair Value $ 9,727   $ 9,727    
Adjusted Cost, Total 12,518   12,518   $ 19,311
Gross Unrealized Gains, Total 2,616   2,616   2,710
Gross Unrealized Losses, Total (13)   (13)   (14)
Fair Value, Total 15,121   15,121   22,007
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds 875 $ 66 3,800 $ 109  
Available-for-sale Securities, Gross Realized Gains 403 43 497 85  
Due in 1 year or less, Fair Value 5,954   5,954    
Due in 1-2 years, Fair Value 2,073   2,073    
Due in 2-5 years, Fair Value 1,493   1,493    
Instruments not due at a single maturity date, Fair Value 207   207    
Cash and Cash Equivalents [Member]          
Available-for-sale Securities [Abstract]          
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds 0 $ 0 129 $ 0  
Asset-Backed Securities [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 0   0   5
Gross Unrealized Gains 0   0   0
Gross Unrealized Losses 0   0   (1)
Fair Value 0   0   4
Corporate Debt Securities [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 4,212   4,212   4,164
Gross Unrealized Gains 9   9   3
Gross Unrealized Losses (12)   (12)   (10)
Fair Value 4,209   4,209   4,157
Financial Institution Instruments [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 4,126   4,126   11,140
Gross Unrealized Gains 5   5   1
Gross Unrealized Losses (1)   (1)   (2)
Fair Value 4,130   4,130   11,139
Government Debt [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 1,385   1,385   748
Gross Unrealized Gains 3   3   0
Gross Unrealized Losses 0   0   (1)
Fair Value 1,388   1,388   747
Marketable Equity Securities [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 2,795   2,795   3,254
Gross Unrealized Gains 2,599   2,599   2,706
Gross Unrealized Losses 0   0   0
Fair Value 5,394   5,394   $ 5,960
Debt Securities [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 9,723   9,723    
Due in 1 year or less, Cost 5,960   5,960    
Due in 1-2 years, Cost 2,069   2,069    
Due in 2-5 years, Cost 1,487   1,487    
Instruments not due at a single maturity date, Cost $ 207   $ 207