Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Cash and Investments, Available-for-Sale Investments (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Dec. 28, 2013
Available-For-Sale Investments [Abstract]          
Adjusted Cost $ 7,884   $ 7,884    
Gross Unrealized Gains     3,233   2,902
Gross Unrealized Losses     (5)   (7)
Fair Value 7,903   7,903    
Adjusted Cost, Total 11,189   11,189   15,191
Fair Value, Total 14,417   14,417   18,086
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds 373 359 1,200 1,200  
Available-for-sale Securities, Gross Realized Gains 0 134 136 143  
Due in 1 year or less, Cost 5,331   5,331    
Due in 1-2 years, Cost 1,197   1,197    
Due in 2-5 years, Cost 922   922    
Instruments not due at a single maturity date, Cost 434   434    
Cost 7,884   7,884    
Due in 1 year or less, Fair Value 5,350   5,350    
Due in 1-2 years, Fair Value 1,198   1,198    
Due in 2-5 years, Fair Value 923   923    
Instruments not due at a single maturity date, Fair Value 432   432    
Asset-Backed Securities [Member]
          
Available-For-Sale Investments [Abstract]          
Adjusted Cost 8   8   11
Gross Unrealized Gains     0   0
Gross Unrealized Losses     (1)   (2)
Fair Value 7   7   9
Cost 8   8   11
Corporate Debt [Member]
          
Available-For-Sale Investments [Abstract]          
Adjusted Cost 2,848   2,848   4,254
Gross Unrealized Gains     18   15
Gross Unrealized Losses     (3)   (3)
Fair Value 2,863   2,863   4,266
Cost 2,848   2,848   4,254
Financial Institution Instruments [Member]
          
Available-For-Sale Investments [Abstract]          
Adjusted Cost 3,976   3,976   5,654
Gross Unrealized Gains     6   5
Gross Unrealized Losses     0   (1)
Fair Value 3,982   3,982   5,658
Cost 3,976   3,976   5,654
Government Debt [Member]
          
Available-For-Sale Investments [Abstract]          
Adjusted Cost 1,052   1,052   1,932
Gross Unrealized Gains     0   1
Gross Unrealized Losses     (1)   (1)
Fair Value 1,051   1,051   1,932
Cost 1,052   1,052   1,932
Marketable Equity Securities [Member]
          
Available-For-Sale Investments [Abstract]          
Gross Unrealized Gains     3,209   2,881
Gross Unrealized Losses     0   0
Adjusted Cost 3,305   3,305   3,340
Fair Value 6,514   6,514   6,221
Clearwire Corporation [Member] | Marketable Equity Securities [Member]
          
Available-For-Sale Investments [Abstract]          
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds   142      
Available-for-sale Securities, Gross Realized Gains   111      
Cash and Cash Equivalents [Member]
          
Available-For-Sale Investments [Abstract]          
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds $ 82 $ 93 $ 459 $ 339