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ENVIRONMENTAL MATTERS (Tables) | 12 Months Ended
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Dec. 31, 2016
Environmental Matters [Abstract] |
Schedule of Environmental Liabilities, Current and Non-current |
| December 31,
(Dollars in millions) | 2016 |  | 2015
Environmental contingent liabilities, current | $ | 30 |  |  | $ | 35 |
Environmental contingent liabilities, long-term | 291 |  |  | 301 |
Total | $ | 321 |  |  | $ | 336 |
Schedule of Changes to Environmental Remediation Liabilities |
(Dollars in millions) | Environmental Remediation Liabilities
Balance at December 31, 2015 | $ | 308 |
Changes in estimates recorded to earnings and other | 11 |
Cash reductions | (24 | )
Balance at December 31, 2016 | $ | 295 |

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