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Investments (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Apr. 02, 2022 | Apr. 03, 2021 | Dec. 31, 2021
Investments |  |  |
Total trading short-term investments | $ 1,295 |  | $ 1,416
Change in unrealized gains (losses) on trading securities | (42) | $ 65 |
Long term investments | 160 |  | 156
Denominated in foreign currencies |  |  |
Investments |  |  |
Total trading short-term investments | 37 |  | 46
Domestic equity securities |  |  |
Investments |  |  |
Fair Value | 460 |  | 472
Domestic debt securities |  |  |
Investments |  |  |
Fair Value | 452 |  | 542
Foreign equity securities |  |  |
Investments |  |  |
Fair Value | 183 |  | 193
Foreign debt securities |  |  |
Investments |  |  |
Fair Value | 138 |  | 133
Money market funds held in trading accounts |  |  |
Investments |  |  |
Fair Value | 48 |  | 59
Other trading investments. |  |  |
Investments |  |  |
Fair Value | $ 14 |  | $ 17

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