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ENVIRONMENTAL MATTERS AND ASSET RETIREMENT OBLIGATIONS (Tables) | 9 Months Ended
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Sep. 30, 2020
Accrual for Environmental Loss Contingencies Disclosure [Abstract] |
Schedule of environmental liabilities, current and non-current |
(Dollars in millions) | September 30, 2020 |  | December 31, 2019
Environmental contingent liabilities, current | $ | 15 |  |  | $ | 20 |
Environmental contingent liabilities, long-term | 272 |  |  | 267 |
Total | $ | 287 |  |  | $ | 287 |
Schedule of changes to environmental remediation liabilities | Changes in the reserves for environmental remediation liabilities during first nine months 2020 and full year 2019 are summarized below:
(Dollars in millions) | Environmental Remediation Liabilities
Balance at December 31, 2018 | $ | 271 |
Changes in estimates recognized in earnings and other | 4 |
Cash reductions | (15) |
Balance at December 31, 2019 | 260 |
Changes in estimates recognized in earnings and other | 9 |
Cash reductions | (9) |
Balance at September 30, 2020 | $ | 260 |

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