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ENVIRONMENTAL MATTERS AND ASSET RETIREMENT OBLIGATIONS (Tables) | 3 Months Ended
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Mar. 31, 2024
Accrual for Environmental Loss Contingencies Disclosure [Abstract] |
Schedule of environmental liabilities, current and non-current |
(Dollars in millions) | March 31, 2024 |  | December 31, 2023
Environmental contingencies, current | $ | 10 |  |  | $ | 10 |
Environmental contingencies, long-term | 272 |  |  | 274 |
Total | $ | 282 |  |  | $ | 284 |
Schedule of changes to environmental remediation liabilities | Changes in the reserves for environmental remediation liabilities during first three months 2024 and full year 2023 are summarized below:
(Dollars in millions) | Environmental Remediation Liabilities
Balance at December 31, 2022 | $ | 245 |
Changes in estimates recognized in earnings and other | 19 |
Cash reductions | (12) |
Balance at December 31, 2023 | 252 |
Changes in estimates recognized in earnings and other | 1 |
Cash reductions | (3) |
Balance at March 31, 2024 | $ | 250 |

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