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Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2024
Equity [Abstract] |
Schedule of Changes in AOCI balance by Component |
| Pension and Other Post-Employment Benefits | Interest Rate Derivatives | Other | Accumulated Other Comprehensive (Loss) Income
(Dollars in Millions) |  |  |  |
Balance December 31, 2023, Net of Tax | $ | (423) |  | $ | 150 |  | $ | (39) |  | $ | (312) |
Other Comprehensive Income (Loss) |  |  |  |
Income Before Reclassifications | — |  | 3 |  | — |  | 3 |
Amounts Reclassified to Net Earnings | 3 |  | — |  | 2 |  | 5 |
Tax Expense | (1) |  | (1) |  | — |  | (2) |
Total Other Comprehensive Income | 2 |  | 2 |  | 2 |  | 6 |
Balance March 31, 2024, Net of Tax | $ | (421) |  | $ | 152 |  | $ | (37) |  | $ | (306) |

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