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COMMITMENTS AND CONTINGENCIES (Federal, State and Provincial Enforcement Actions) (Details) - Federal, State, and Provincial Enforcement Actions | Dec. 31, 2018 USD ($) proceeding | Dec. 31, 2017 proceeding
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Federal and State Enforcement Actions |  |
Number of proceedings | proceeding | 10 | 5
Sanctions relating to waste treatment | $ | $ 100,000,000 |

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