Annual report pursuant to Section 13 and 15(d)

Cash and Investments, Available For Sale Investments (Detail)

v3.3.1.900
Cash and Investments, Available For Sale Investments (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Dec. 28, 2013
Available-for-sale Securities [Abstract]      
Fair Value $ 16,047    
Adjusted Cost, Total 19,311 $ 9,253  
Gross Unrealized Gains, Total 2,710 3,794  
Gross Unrealized Losses, Total (14) (9)  
Fair Value, Total 22,007 13,038  
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds 2,200 1,700 $ 1,300
Available-for-sale Securities, Gross Realized Gains 133 136 146
Due in 1 year or less, Fair Value 5,893    
Due in 1-2 years, Fair Value 1,268    
Due in 2-5 years, Fair Value 620    
Instruments not due at a single maturity date, Fair Value 8,266    
Cash and Cash Equivalents [Member]      
Available-for-sale Securities [Abstract]      
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds 144 509 $ 339
Asset-backed securities      
Available-for-sale Securities [Abstract]      
Adjusted Cost 5 8  
Gross Unrealized Gains 0 0  
Gross Unrealized Losses (1) (2)  
Fair Value 4 6  
Corporate debt      
Available-for-sale Securities [Abstract]      
Adjusted Cost 4,164 2,040  
Gross Unrealized Gains 3 13  
Gross Unrealized Losses (10) (5)  
Fair Value 4,157 2,048  
Financial institution instruments      
Available-for-sale Securities [Abstract]      
Adjusted Cost 11,140 3,146  
Gross Unrealized Gains 1 2  
Gross Unrealized Losses (2) (1)  
Fair Value 11,139 3,147  
Government debt      
Available-for-sale Securities [Abstract]      
Adjusted Cost 748 741  
Gross Unrealized Gains 0 0  
Gross Unrealized Losses (1) (1)  
Fair Value 747 740  
Marketable equity securities      
Available-for-sale Securities [Abstract]      
Adjusted Cost 3,254 3,318  
Gross Unrealized Gains 2,706 3,779  
Gross Unrealized Losses 0 0  
Fair Value 5,960 $ 7,097  
Debt Securities [Member]      
Available-for-sale Securities [Abstract]      
Adjusted Cost 16,057    
Due in 1 year or less, Cost 5,896    
Due in 1-2 years, Cost 1,271    
Due in 2-5 years, Cost 623    
Instruments not due at a single maturity date, Cost $ 8,267