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Marketable and Other Securities | 3 Months Ended
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Mar. 31, 2024
Marketable Securities [Abstract] |
Marketable and Other Securities | Marketable and Other Securities The following table summarizes the fair value of cash equivalents and marketable debt securities, which approximates cost:
| Fair Value Level |  | March 31, 2024 |  | December 31, 2023
Cash and cash equivalents |  |  |  |  |
Cash and time deposits |  |  | $ | 10,105 |  |  | $ | 8,977 |
Available-for-sale debt securities |  |  |  |  |
U.S. government and agencies | 2 |  | 849 |  |  | 211 |
Corporate debt | 2 |  | 2,997 |  |  | 1,439 |
Sovereign debt | 2 |  | 840 |  |  | 734 |
Total available-for-sale debt securities – cash equivalents |  |  | 4,685 |  |  | 2,384 |
Money market funds | 1 |  | 2,844 |  |  | 7,491 |
Total cash and cash equivalents |  |  | $ | 17,635 |  |  | $ | 18,853 |
Marketable debt securities |  |  |  |  |
U.S. government and agencies | 2 |  | $ | 3,459 |  |  | $ | 3,495 |
Corporate debt and other | 2 |  | 3,808 |  |  | 3,529 |
Mortgage and asset-backed | 2 |  | 578 |  |  | 589 |
Total available-for-sale debt securities – marketable securities |  |  | $ | 7,845 |  |  | $ | 7,613 |
Restricted cash |  |  |  |  |
Cash and cash equivalents |  |  | $ | 293 |  |  | $ | 277 |
Money market funds | 1 |  | 3,450 |  |  | 2,787 |
Total restricted cash |  |  | $ | 3,743 |  |  | $ | 3,064 |
Available-for-sale debt securities included above with contractual maturities(a) |  |  |  |
Due in one year or less |  |  | $ | 6,137 |  |  |
Due between one and five years |  |  | 5,641 |  |  |
Total available-for-sale debt securities with contractual maturities |  |  | $ | 11,778 |  |  |
__________ (a)Excludes mortgage and asset-backed securities of $578 million at March 31, 2024 as these securities are not due at a single maturity date. Proceeds from the sale of available-for-sale debt securities sold prior to maturity were $470 million and $380 million in the three months ended March 31, 2024 and 2023. Net unrealized losses and gains on available-for-sale debt securities were insignificant in the three months ended March 31, 2024 and 2023. Cumulative unrealized losses on available-for-sale debt securities were $158 million and $160 million at March 31, 2024 and December 31, 2023. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheet to the total shown in the condensed consolidated statement of cash flows:
| March 31, 2024
Cash and cash equivalents | $ | 17,635 |
Restricted cash included in Other current assets | 3,260 |
Restricted cash included in Other assets | 483 |
Total | $ | 21,378 |

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + 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 + Details
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