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Accumulated Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Other comprehensive income activity, net of tax, is provided in the following table (dollars in millions):
| Pension |  | Translation Adjustments |  | Other |  | Total
Balance at December 31, 2020 | $ | (81) |  |  | $ | (68) |  |  | $ | (2) |  |  | $ | (151) |
Reclassified to income statement, net of taxes 1 | 5 |  |  | — |  |  | — |  |  | 5 |
Pension settlement loss, net of taxes | — |  |  | — |  |  | — |  |  | — |
Translation adjustments | — |  |  | (28) |  |  | — |  |  | (28) |
Balance at December 31, 2021 | (76) |  |  | (96) |  |  | (1) |  |  | (174) |
Reclassified to income statement, net of taxes 1 | — |  |  | — |  |  | 1 |  |  | 1 |
Pension settlement loss, net of taxes | 71 |  |  | — |  |  | — |  |  | 71 |
Translation adjustments | — |  |  | 2 |  |  | — |  |  | 2 |
Balance at December 31, 2022 | (5) |  |  | (94) |  |  | — |  |  | (99) |
Reclassified to income statement, net of taxes 1 | — |  |  | — |  |  | — |  |  | — |
Pension settlement loss, net of taxes | 4 |  |  | — |  |  | — |  |  | 4 |
Translation adjustments | — |  |  | 6 |  |  | — |  |  | 6 |
Balance at December 31, 2023 | $ | — |  |  | $ | (89) |  |  | $ | — |  |  | $ | (89) |

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