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Investments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 28, 2024 | Sep. 30, 2023 | Sep. 28, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Investments |  |  |  |  |
Total trading short-term investments | $ 1,096 |  | $ 1,096 |  | $ 973
Unrealized gain (loss) on trading securities | 27 | $ (1) | 44 | $ 28 |
Long term investments | 135 |  | 135 |  | 207
Denominated in foreign currencies |  |  |  |  |
Investments |  |  |  |  |
Total trading short-term investments | 31 |  | 31 |  | 18
Business Development Company |  |  |  |  |
Investments |  |  |  |  |
Long term investments |  |  |  |  | 68
Domestic equity securities |  |  |  |  |
Investments |  |  |  |  |
Fair Value | 218 |  | 218 |  | 143
Foreign equity securities |  |  |  |  |
Investments |  |  |  |  |
Fair Value | 108 |  | 108 |  | 96
Domestic debt securities |  |  |  |  |
Investments |  |  |  |  |
Fair Value | 620 |  | 620 |  | 593
Foreign debt securities |  |  |  |  |
Investments |  |  |  |  |
Fair Value | 127 |  | 127 |  | 120
Money market funds held in trading accounts |  |  |  |  |
Investments |  |  |  |  |
Fair Value | 18 |  | 18 |  | 17
Other trading securities |  |  |  |  |
Investments |  |  |  |  |
Fair Value | $ 5 |  | $ 5 |  | $ 4

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