Other Financial Statement Details Gains (Losses) on Equity Investments, Net (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Gain (Loss) on Securities [Line Items]
Impairment charges	$ (303)	$ (122)	$ (424)
Total gains (losses) on equity investments, net	$ 1,904	$ 1,539	$ (125)

Amount of realized and unrealized gain (loss) on investment.

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