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COMMITMENTS AND CONTINGENCIES (Tables) | 3 Months Ended
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Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Environmental Obligations | The following is a summary of our environmental obligations:
| (In Millions)
| March 31, 2021 |  | December 31, 2020
Environmental obligations | $ | 134 |  |  | $ | 135 |
Less: current portion | 20 |  |  | 18 |
Long-term environmental obligations | $ | 114 |  |  | $ | 117 |

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