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Investments of Insurance Subsidiaries (Tables) | 3 Months Ended
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Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investments | A summary of our insurance subsidiaries’ investments at March 31, 2024 and December 31, 2023 follows (dollars in millions):
|  | March 31, 2024 |
|  |  |  |  | Unrealized Amounts |  |  |  |
|  | Amortized Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Debt securities |  | $ | 402 |  |  | $ | — |  |  | $ | (30 | ) |  | $ | 372 |
Money market funds and other |  |  | 194 |  |  |  | — |  |  |  | — |  |  |  | 194 |
|  | $ | 596 |  |  | $ | — |  |  | $ | (30 | ) |  |  | 566 |
Amounts classified as current assets |  |  |  |  |  |  |  |  |  |  |  | (95 | )
Investment carrying value |  |  |  |  |  |  |  |  |  |  | $ | 471 |
|  | December 31, 2023 |
|  |  |  |  | Unrealized Amounts |  |  |  |
|  | Amortized Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Debt securities |  | $ | 404 |  |  | $ | 1 |  |  | $ | (29 | ) |  | $ | 376 |
Money market funds and other |  |  | 188 |  |  |  | — |  |  |  | — |  |  |  | 188 |
|  | $ | 592 |  |  | $ | 1 |  |  | $ | (29 | ) |  |  | 564 |
Amounts classified as current assets |  |  |  |  |  |  |  |  |  |  |  | (87 | )
Investment carrying value |  |  |  |  |  |  |  |  |  |  | $ | 477 |
Schedule of Maturities of Investments | Scheduled maturities of investments in debt securities at March 31, 2024 were as follows (dollars in millions):
|  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 14 |  |  | $ | 14 |
Due after one year through five years |  |  | 147 |  |  |  | 141 |
Due after five years through ten years |  |  | 161 |  |  |  | 143 |
Due after ten years |  |  | 80 |  |  |  | 74 |
|  | $ | 402 |  |  | $ | 372 |

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