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Short-Term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2024
Line of Credit Facility [Line Items] |
Schedule of Balances Outstanding and Interest Rates of Borrowings | Balances outstanding and interest rates on borrowings (excluding letters of credit) under the Company’s revolving committed line of credit were as follows as of December 31 (dollars in millions):
|  | 2024 |  |  | 2023 |
Balance outstanding at end of period |  | $ | 342 |  |  | $ | 349 |
Letters of credit balance outstanding at end of period |  |  | 5 |  |  |  | 5 |
Average interest rate at end of period |  |  | 5.52 | % |  |  | 6.46 | %

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