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Investments (Tables) | 9 Months Ended
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Sep. 28, 2024
Investments |
Summary of the estimated fair value of short-term investments classified as trading securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 28, | ​ | December 31, |
(Millions of dollars) |  | 2024 | ​ | 2023 |
Domestic equity securities | ​ | $ | 218 | ​ | $ | 143 | ​
Foreign equity securities | ​ |  | 108 | ​ |  | 96 | ​
Domestic debt securities | ​ | ​ | 620 | ​ | ​ | 593 | ​
Foreign debt securities | ​ | ​ | 127 | ​ | ​ | 120 | ​
Money market funds held in trading accounts | ​ | ​ | 18 | ​ | ​ | 17 | ​
Other trading securities | ​ | ​ | 5 | ​ | ​ | 4 | ​
Total trading short-term investments | ​ | $ | 1,096 | ​ | $ | 973 | ​

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