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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Dec. 31, 2018
Accrual for Environmental Loss Contingencies [Roll Forward] |  |  |  |  |  |
Beginning of period |  |  | $ 755 |  |  |
Accruals for environmental matters deemed probable and reasonably estimable |  |  | 169 |  |  |
Environmental liability payments |  |  | (135) |  |  |
Other |  |  | (4) |  |  |
End of period | $ 785 |  | 785 |  |  |
Probable and reasonably estimable environmental liabilities, net of indemnities | 6 | $ 150 | 59 | $ 334 |  |
Loss Contingency, Classification of Accrual [Abstract] |  |  |  |  |  |
Accrued liabilities |  |  |  |  | $ 184 | $ 175
Other liabilities |  |  |  |  | 601 | 580
Total environmental liabilities | $ 785 |  | 755 |  | $ 785 | $ 755
Sale Of Legacy Remediated Property [Member] |  |  |  |  |  |
Accrual for Environmental Loss Contingencies [Roll Forward] |  |  |  |  |  |
Probable and reasonably estimable environmental liabilities, net of indemnities |  |  | $ (43) |  |  |

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