Financial Instruments - Investments - Unrealized Gains and Losses Related to Equity Securities (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Sep. 27, 2026 |
Sep. 28, 2025 |
Sep. 27, 2026 |
Sep. 28, 2025 |
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| Fair Value Disclosures [Abstract] | ||||||
| Net (gains)/losses recognized during the period on equity securities | [1] | $ 75 | $ (201) | $ 121 | $ 94 | |
| Less: Net (gains)/losses recognized during the period on equity securities sold during the period | (59) | (224) | (81) | (1,159) | ||
| Net unrealized (gains)/losses during the reporting period on equity securities still held at the reporting date | $ 134 | $ 23 | $ 202 | $ 1,253 | ||
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