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Investments of Insurance Subsidiaries (Tables) | 3 Months Ended
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Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investments | A summary of our insurance subsidiaries’ investments at March 31, 2022 and December 31, 2021 follows (dollars in millions):
|  | March 31, 2022 |
|  |  |  |  | Unrealized Amounts |  |  |  |
|  | Amortized Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Debt securities |  | $ | 411 |  |  | $ | 4 |  |  | $ | (14 | ) |  | $ | 401 |
Money market funds and other |  |  | 112 |  |  |  | — |  |  |  | — |  |  |  | 112 |
|  | $ | 523 |  |  | $ | 4 |  |  | $ | (14 | ) |  |  | 513 |
Amounts classified as current assets |  |  |  |  |  |  |  |  |  |  |  | (105 | )
Investment carrying value |  |  |  |  |  |  |  |  |  |  | $ | 408 |
|  | December 31, 2021 |
|  |  |  |  | Unrealized Amounts |  |  |  |
|  | Amortized Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Debt securities |  | $ | 400 |  |  | $ | 18 |  |  | $ | (2 | ) |  | $ | 416 |
Money market funds and other |  |  | 125 |  |  |  | — |  |  |  | — |  |  |  | 125 |
|  | $ | 525 |  |  | $ | 18 |  |  | $ | (2 | ) |  |  | 541 |
Amounts classified as current assets |  |  |  |  |  |  |  |  |  |  |  | (103 | )
Investment carrying value |  |  |  |  |  |  |  |  |  |  | $ | 438 |
Schedule of Maturities of Investments | Scheduled maturities of investments in debt securities at March 31, 2022 were as follows (dollars in millions):
|  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 8 |  |  | $ | 8 |
Due after one year through five years |  |  | 139 |  |  |  | 140 |
Due after five years through ten years |  |  | 173 |  |  |  | 166 |
Due after ten years |  |  | 91 |  |  |  | 87 |
|  | $ | 411 |  |  | $ | 401 |

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