Annual report pursuant to Section 13 and 15(d)

Gains (Losses) on Equity Investments, Net (Detail)

v3.3.1.900
Gains (Losses) on Equity Investments, Net (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Dec. 28, 2013
Schedule Of Investment Type [Line Items]      
Share of equity method investee losses, net $ (95) $ (69) $ (69)
Impairments (185) (146) (123)
Other, net 398 147 102
Total gains (losses) on equity investments, net 315 411 471
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
Clearwire Corporation [Member] | Marketable equity securities      
Schedule Of Investment Type [Line Items]      
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds     142
Available-for-sale Securities, Gross Realized Gains     111
Clearwire, LLC [Member] | Equity Method Investments [Member]      
Schedule Of Investment Type [Line Items]      
Proceeds from Sale, Maturity and Collection of Investments     328
Equity Method Investment, Realized Gain (Loss) on Disposal     328
Interest In Clearwire, LLC And Shares In Clearwire Corporation [Member]      
Schedule Of Investment Type [Line Items]      
Gain (Loss) On Sale Of Combined Investment     439
Equity Investments [Member]      
Schedule Of Investment Type [Line Items]      
Gains on sales, net 145 422 515
Investment Income, Dividend $ 52 $ 57 $ 46