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COMMITMENTS AND CONTINGENCIES (Tables)
3 Months Ended
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 portion20 18 
Long-term environmental obligations$114 $117