Annual report pursuant to Section 13 and 15(d)

Investments, Non-Marketable Cost Method Investments (Detail)

v3.20.4
Investments, Non-Marketable Cost Method Investments (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Gain (Loss) on Securities [Line Items]      
Non-marketable equity securities $ 18 $ 37  
Impairments 303 122 $ 424
Cost-method Investments [Member]      
Gain (Loss) on Securities [Line Items]      
Impairments $ 290 $ 122 $ 132