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INVESTMENTS (Tables) | 3 Months Ended
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Mar. 29, 2024
Investments, Debt and Equity Securities [Abstract] |
Carrying value of equity securities by balance sheet location | The carrying values of our equity securities were included in the following line items in our consolidated balance sheets (in millions):
| Fair Value with Changes Recognized in Income | Measurement Alternative — No Readily Determinable Fair Value
March 29, 2024 |  |
Marketable securities | $ | 373 |  | $ | — |
Other investments | 105 |  | 42 |
Other noncurrent assets | 1,628 |  | — |
Total equity securities | $ | 2,106 |  | $ | 42 |
December 31, 2023 |  |
Marketable securities | $ | 345 |  | $ | — |
Other investments | 76 |  | 42 |
Other noncurrent assets | 1,585 |  | — |
Total equity securities | $ | 2,006 |  | $ | 42 |
Net unrealized gains and losses related to equity securities still held at the end of the period | The calculation of net unrealized gains and losses recognized during the period related to equity securities still held at the end of the period is as follows (in millions):
| Three Months Ended
| March 29, 2024 | March 31, 2023
Net gains (losses) recognized during the period related to equity securities | $ | 183 |  | $ | 125 |
Less: Net gains (losses) recognized during the period related to equity securities sold during the period | 49 |  | 1 |
Net unrealized gains (losses) recognized during the period related to equity securities still held at the end of the period | $ | 134 |  | $ | 124 |
Schedule of available-for-sale and trading securities | Our debt securities consisted of the following (in millions):
|  | Gross Unrealized | Estimated Fair Value
| Cost | Gains | Losses
March 29, 2024 |  |  |  |
Trading securities | $ | 45 |  | $ | 1 |  | $ | (2) |  | $ | 44 |
Available-for-sale securities | 1,516 |  | 29 |  | (25) |  | 1,520 |
Total debt securities | $ | 1,561 |  | $ | 30 |  | $ | (27) |  | $ | 1,564 |
December 31, 2023 |  |  |  |
Trading securities | $ | 43 |  | $ | — |  | $ | (2) |  | $ | 41 |
Available-for-sale securities | 1,136 |  | 26 |  | (28) |  | 1,134 |
Total debt securities | $ | 1,179 |  | $ | 26 |  | $ | (30) |  | $ | 1,175 |
Carrying values of debt securities by balance sheet location | The carrying values of our debt securities were included in the following line items in our consolidated balance sheets (in millions):
| March 29, 2024 |  | December 31, 2023
| Trading Securities | Available-for-Sale Securities |  | Trading Securities | Available-for-Sale Securities
Marketable securities | $ | 44 |  | $ | 1,299 |  |  | $ | 41 |  | $ | 914 |
Other noncurrent assets | — |  | 221 |  |  | — |  | 220 |
Total debt securities | $ | 44 |  | $ | 1,520 |  |  | $ | 41 |  | $ | 1,134 |
Contractual maturities of available-for-sale debt securities | The contractual maturities of these available-for-sale debt securities as of March 29, 2024 were as follows (in millions):
| Cost | Estimated Fair Value |  |  |
Within 1 year | $ | 224 |  | $ | 224 |  |  |  |
After 1 year through 5 years | 1,075 |  | 1,080 |  |  |  |
After 5 years through 10 years | 45 |  | 57 |  |  |  |
After 10 years | 172 |  | 159 |  |  |  |
Total | $ | 1,516 |  | $ | 1,520 |  |  |  |
Realized Gain (Loss) on Investments | The sale and/or maturity of available-for-sale debt securities resulted in the following realized activity (in millions):
|  |  | Three Months Ended
|  |  |  | March 29, 2024 | March 31, 2023
Gross gains |  |  |  | $ | 1 |  | $ | — |
Gross losses |  |  |  | (7) |  | (3) |
Proceeds |  |  |  | 383 |  | 68 |

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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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