Quarterly report pursuant to Section 13 or 15(d)

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

v3.2.0.727
Cash and Investments, Available-for-Sale Investments (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Dec. 27, 2014
Available-for-sale Securities [Abstract]          
Adjusted Cost $ 7,565   $ 7,565    
Fair Value 7,577   7,577    
Adjusted Cost, Total 10,867   10,867   $ 9,253
Gross Unrealized Gains, Total 3,931   3,931   3,794
Gross Unrealized Losses, Total (13)   (13)   (9)
Fair Value, Total 14,785   14,785   13,038
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds 66 $ 594 109 $ 873  
Available-for-sale Securities, Gross Realized Gains 43 69 85 136  
Due in 1 year or less, Cost 5,717   5,717    
Due in 1-2 years, Cost 933   933    
Due in 2-5 years, Cost 789   789    
Instruments not due at a single maturity date, Cost 126   126    
Due in 1 year or less, Fair Value 5,732   5,732    
Due in 1-2 years, Fair Value 933   933    
Due in 2-5 years, Fair Value 789   789    
Instruments not due at a single maturity date, Fair Value 123   123    
Cash and Cash Equivalents [Member]          
Available-for-sale Securities [Abstract]          
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds 0 $ 273 0 $ 378  
Asset-Backed Securities [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 8   8   8
Gross Unrealized Gains 0   0   0
Gross Unrealized Losses (2)   (2)   (2)
Fair Value 6   6   6
Corporate Debt [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 2,951   2,951   2,040
Gross Unrealized Gains 18   18   13
Gross Unrealized Losses (5)   (5)   (5)
Fair Value 2,964   2,964   2,048
Financial Institution Instruments [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 3,884   3,884   3,146
Gross Unrealized Gains 1   1   2
Gross Unrealized Losses (1)   (1)   (1)
Fair Value 3,884   3,884   3,147
Government Debt [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 722   722   741
Gross Unrealized Gains 1   1   0
Gross Unrealized Losses 0   0   (1)
Fair Value 723   723   740
Marketable Equity Securities [Member]          
Available-for-sale Securities [Abstract]          
Adjusted Cost 3,302   3,302   3,318
Gross Unrealized Gains 3,911   3,911   3,779
Gross Unrealized Losses (5)   (5)   0
Fair Value $ 7,208   $ 7,208   $ 7,097