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Investments of Insurance Subsidiaries (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investments | A summary of the insurance subsidiaries’ investments at December 31 follows (dollars in millions):
|  | 2022 |
|  |  |  |  | Unrealized Amounts |  |  |  |
|  | Amortized Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Debt securities |  | $ | 415 |  |  | $ | — |  |  | $ | (38 | ) |  | $ | 377 |
Money market funds and other |  |  | 96 |  |  |  | — |  |  |  | — |  |  |  | 96 |
|  | $ | 511 |  |  | $ | — |  |  | $ | (38 | ) |  |  | 473 |
Amounts classified as current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (92 | )
Investment carrying value |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 381 |
|  | 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 December 31, 2022 were as follows (dollars in millions):
|  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 31 |  |  | $ | 31 |
Due after one year through five years |  |  | 121 |  |  |  | 116 |
Due after five years through ten years |  |  | 185 |  |  |  | 161 |
Due after ten years |  |  | 78 |  |  |  | 69 |
|  | $ | 415 |  |  | $ | 377 |

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