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Investments - Bejing Unisoc Technology (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 27, 2021 | Mar. 28, 2020 | Dec. 26, 2020
Schedule of Investments [Line Items] |  |  |
Gains (losses) on equity investments, net | $ 368 | $ (111) |
Bejing Unisoc Technology Ltd. |  |  |
Schedule of Investments [Line Items] |  |  |
Gains (losses) on equity investments, net | 471 |  |
Net book value of nonmarketable equity investment | $ 1,100 |  | $ 658

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