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Fair Value Measurements - Summary of Activity Related to Equity Investments (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 30, 2018
Equity Investment [Roll Forward] |  |
Non Current Other Assets | $ 5,159 | $ 4,182
Equity Securities | Equity Investments with readily determinable value |  |
Equity Investment [Roll Forward] |  |
Carrying value, beginning of period | 511 |
Changes in Fair Value Reflected in Net Income | 143 |
Sales/ Purchases/Other | 176 |
Carrying value, end of period | 830 |
Non Current Other Assets | 830 |
Equity Securities | Equity Investments without readily determinable value |  |
Equity Investment [Roll Forward] |  |
Carrying value, beginning of period | 681 |
Changes in Fair Value Reflected in Net Income | 4 |
Sales/ Purchases/Other | 13 |
Carrying value, end of period | 698 |
Non Current Other Assets | $ 698 |

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