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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of the entity's accumulated other comprehensive loss by component | The table below summarizes changes in accumulated other comprehensive loss recorded on our consolidated balance sheet by component for the year ended December 31, 2024:
| Pension Plans |  | Post-Retirement Benefit Plans |  | Foreign Currency Translation Adjustment and Other |  | Total
| (Dollars in millions)
Balance at December 31, 2023 | $ | (1,045) |  |  | 276 |  |  | (41) |  |  | (810) |
Other comprehensive (loss) income before reclassifications | (34) |  |  | 63 |  |  | 1 |  |  | 30 |
Amounts reclassified from accumulated other comprehensive income (loss) | 76 |  |  | (19) |  |  | — |  |  | 57 |
Net current-period other comprehensive income | 42 |  |  | 44 |  |  | 1 |  |  | 87 |
Balance at December 31, 2024 | $ | (1,003) |  |  | 320 |  |  | (40) |  |  | (723) |
The table below summarizes changes in accumulated other comprehensive loss recorded on our consolidated balance sheet by component for the year ended December 31, 2023:
| Pension Plans |  | Post-Retirement Benefit Plans |  | Foreign Currency Translation Adjustment and Other |  | Total
| (Dollars in millions)
Balance at December 31, 2022 | $ | (985) |  |  | 308 |  |  | (422) |  |  | (1,099) |
Other comprehensive loss before reclassifications | (110) |  |  | (11) |  |  | (1) |  |  | (122) |
Amounts reclassified from accumulated other comprehensive income (loss) | 50 |  |  | (21) |  |  | 382 |  |  | 411 |
Net current-period other comprehensive (loss) income | (60) |  |  | (32) |  |  | 381 |  |  | 289 |
Balance at December 31, 2023 | $ | (1,045) |  |  | 276 |  |  | (41) |  |  | (810) |
Schedule of reclassifications out of accumulated other comprehensive loss by component | The amount of realized losses reclassified from accumulated other comprehensive loss to the statement of operations consists of the following (in millions):
Derivatives designated as hedging instruments |
Cash flow hedging contracts |
Year Ended December 31, 2022 | $ | 22 |
The table below presents further information about our reclassifications out of accumulated other comprehensive loss by component for the year ended December 31, 2024:
Year Ended December 31, 2024 |  | (Decrease) Increase in Net Loss |  | Affected Line Item in Consolidated Statement of Operations
|  | (Dollars in millions) |  |
Amortization of pension & post-retirement plans (1) |  |  |  |
Net actuarial loss |  | $ | 91 |  | Other income (expense), net
Prior service cost |  | (15) |  | Other income (expense), net
Total before tax |  | 76 |  |  |
Income tax benefit |  | (19) |  | Income tax (benefit) expense
Net of tax |  | $ | 57 |  |  |
________________________________________________________________________ (1)See Note 11—Employee Benefits for additional information on our net periodic benefit (expense) income related to our pension and post-retirement plans. The table below presents further information about our reclassifications out of accumulated other comprehensive loss by component for the year ended December 31, 2023:
Year Ended December 31, 2023 |  | (Decrease) Increase in Net Loss |  | Affected Line Item in Consolidated Statement of Operations
|  | (Dollars in millions) |  |
Amortization of pension & post-retirement plans (1) |  |  |  |
Net actuarial loss |  | $ | 82 |  |  | Other income (expense), net
Prior service cost |  | (15) |  |  | Other income (expense), net
Total before tax |  | 67 |  |  |
Income tax benefit |  | (16) |  |  | Income tax (benefit) expense
Net of tax |  | $ | 51 |  |  |
Year Ended December 31, 2023 |  | Reclassification out of Accumulated Other Comprehensive Loss |  | Affected line item in Consolidated Balance Sheets and Consolidated Statement of Operations
Reclassification of realized loss on foreign currency translation to valuation allowance within assets held for sale(2) |  | $ | 389 |  |  | Assets held for sale
Reclassification of realized loss on foreign currency translation to loss on sale of business(3) |  | (7) |  | Net loss (gain) on sale of businesses
Subtotal reclassification of realized loss on foreign currency |  | 382 |  |  |
Reclassification of net actuarial loss to valuation allowance within assets held for sale(2) |  | (24) |  |  | Assets held for sale
Reclassification of net actuarial gain to loss on sale of business(3) |  | 2 |  |  | Net loss (gain) on sale of businesses
Subtotal reclassification of net actuarial loss |  | (22) |  |  |
Income tax benefit |  | — |  | Income tax expense
Net of tax |  | $ | 360 |  |  |
________________________________________________________________________ (1)See Note 11—Employee Benefits for additional information on our net periodic benefit (expense) income related to our pension and post-retirement plans. (2)Recognized in net income through net loss (gain) on sale of business for the year ended December 31, 2022 and included in our valuation allowance in assets held for sale as of December 31, 2022. (3)(Decrease) increase to net loss for the year ended December 31, 2023.

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