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Equity (Tables) | 12 Months Ended
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Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | A summary of the changes in each component of Accumulated other comprehensive (loss) income, net of tax is provided below:
(dollars in millions) |  | Foreign Currency Translation |  | Defined Benefit Pension and Postretirement Plans |  |  |  | Unrealized Hedging (Losses) Gains |  | Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2020 |  | $ | 710 |  |  | $ | (4,483) |  |  |  |  | $ | 39 |  |  | $ | (3,734) |
Other comprehensive income (loss) before reclassifications, net |  | (647) |  |  | 3,210 |  |  |  |  | (226) |  |  | 2,337 |
Amounts reclassified, pre-tax |  | — |  |  | 258 |  |  |  |  | (28) |  |  | 230 |
Tax benefit (expense) |  | (14) |  |  | (813) |  |  |  |  | 79 |  |  | (748) |
Balance at December 31, 2021 |  | $ | 49 |  |  | $ | (1,828) |  |  |  |  | $ | (136) |  |  | $ | (1,915) |
Other comprehensive income (loss) before reclassifications, net |  | (1,050) |  |  | 1,225 |  |  |  |  | (246) |  |  | (71) |
Amounts reclassified, pre-tax |  | 2 |  |  | 129 |  |  |  |  | 103 |  |  | 234 |
Tax benefit (expense) |  | (6) |  |  | (308) |  |  |  |  | 48 |  |  | (266) |
Balance at December 31, 2022 |  | $ | (1,005) |  |  | $ | (782) |  |  |  |  | $ | (231) |  |  | $ | (2,018) |
Other comprehensive income (loss) before reclassifications, net |  | 562 |  |  | (1,041) |  |  |  |  | 278 |  |  | (201) |
Amounts reclassified, pre-tax |  | — |  |  | (568) |  |  |  |  | 80 |  |  | (488) |
Tax benefit (expense) |  | 3 |  |  | 365 |  |  |  |  | (80) |  |  | 288 |
Balance at December 31, 2023 |  | $ | (440) |  |  | $ | (2,026) |  |  |  |  | $ | 47 |  |  | $ | (2,419) |

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