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Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2023
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, 2022, Net of Tax | $ | (497) |  | $ | 150 |  | $ | (41) |  | $ | (388) |
Other Comprehensive Income (Loss) |  |  |  |
Income Before Reclassifications | — |  | 22 |  | — |  | 22 |
Amounts Reclassified to Net Earnings | 15 |  | — |  | (1) |  | 14 |
Tax Expense | (3) |  | (18) |  | 1 |  | (20) |
Total Other Comprehensive Income | 12 |  | 4 |  | — |  | 16 |
Balance September 30, 2023, Net of Tax | $ | (485) |  | $ | 154 |  | $ | (41) |  | $ | (372) |

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