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INVESTMENTS (Tables) | 3 Months Ended
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Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Investments | The following table summarizes the Company's investments by major security type at March 31, 2024 (in millions):
|  | Cost |  | Gross Unrealized Gains /Upward Adjustments |  | Gross Unrealized Losses /Downward Adjustments |  | Carrying Value
Short-term investments: |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |
International government securities |  | $ | 41 |  |  | $ | — |  |  | $ | — |  |  | $ | 41 |
U.S. government securities |  | 106 |  |  | — |  |  | — |  |  | 106 |
Corporate debt securities |  | 216 |  |  | — |  |  | (1) |  |  | 215 |
Total short-term investments |  | $ | 363 |  |  | $ | — |  |  | $ | (1) |  |  | $ | 362 |
Long-term investments: |  |  |  |  |  |  |  |
Equity securities: |  |  |  |  |  |  |  |
Equity securities with readily determinable fair values |  | $ | 715 |  |  | $ | — |  |  | $ | (420) |  |  | $ | 295 |
Equity securities of private entities |  | 97 |  |  | 259 |  |  | (208) |  |  | 148 |
Total long-term investments |  | $ | 812 |  |  | $ | 259 |  |  | $ | (628) |  |  | $ | 443 |
The following table summarizes the Company's investments by major security type at December 31, 2023 (in millions):
|  | Cost |  | Gross Unrealized Gains/Upward Adjustments |  | Gross Unrealized Losses/Downward Adjustments |  | Carrying Value
Short-term investments: |  |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |  |
International government securities |  | $ | 63 |  |  | $ | — |  |  | $ | — |  |  | $ | 63 |
U.S. government securities (1) |  | 152 |  |  | — |  |  | (1) |  |  | 151 |
Corporate debt securities |  | 365 |  |  | — |  |  | (3) |  |  | 362 |
Total short-term investments |  | $ | 580 |  |  | $ | — |  |  | $ | (4) |  |  | $ | 576 |
Long-term investments: |  |  |  |  |  |  |  |
Equity securities: |  |  |  |  |  |  |  |
Equity securities with readily determinable fair values |  | $ | 715 |  |  | $ | — |  |  | $ | (404) |  |  | $ | 311 |
Equity securities of private entities |  | 78 |  |  | 259 |  |  | (208) |  |  | 129 |
Total long-term investments |  | $ | 793 |  |  | $ | 259 |  |  | $ | (612) |  |  | $ | 440 |
(1) Includes investments in U.S. municipal bonds.

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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//320/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 321 -Publisher FASB -URI https://asc.fasb.org//321/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 325 -Publisher FASB -URI https://asc.fasb.org//325/tableOfContent + Details
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- References No definition available. + Details
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