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Investments of Insurance Subsidiaries | 12 Months Ended
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Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Investments of Insurance Subsidiaries | NOTE 6 — INVESTMENTS OF INSURANCE SUBSIDIARIES A summary of the insurance subsidiaries’ investments at December 31 follows (dollars in millions):
|  | 2024 |
|  |  |  |  | Unrealized Amounts |  |  |  |
|  | Amortized Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Debt securities |  | $ | 388 |  |  | $ | — |  |  | $ | (27 | ) |  | $ | 361 |
Money market funds and other |  |  | 296 |  |  |  | — |  |  |  | — |  |  |  | 296 |
|  | $ | 684 |  |  | $ | — |  |  | $ | (27 | ) |  |  | 657 |
Amounts classified as current assets |  |  |  |  |  |  |  |  |  |  |  | (88 | )
Investment carrying value |  |  |  |  |  |  |  |  |  |  | $ | 569 |
NOTE 6 — INVESTMENTS OF INSURANCE SUBSIDIARIES (continued)
|  | 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 |
At December 31, 2024 and 2023, the investments in debt securities of our insurance subsidiaries were classified as “available-for-sale.” Changes in unrealized gains and losses that are not credit-related are recorded as adjustments to other comprehensive income (loss). Scheduled maturities of investments in debt securities at December 31, 2024 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 |  |  | 145 |  |  |  | 140 |
Due after five years through ten years |  |  | 147 |  |  |  | 130 |
Due after ten years |  |  | 65 |  |  |  | 60 |
|  | $ | 388 |  |  | $ | 361 |
The average expected maturity of the investments in debt securities at December 31, 2024 was 4.4 years, compared to the average scheduled maturity of 8.1 years. Expected and scheduled maturities may differ because the issuers of certain securities have the right to call, prepay or otherwise redeem such obligations prior to their scheduled maturity date.

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