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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Loss Contingency, Classification of Accrual [Abstract] |  |  |
Accrued liabilities | $ 225,000,000 | $ 225,000,000 |
Other liabilities | 393,000,000 | 435,000,000 |
Total environmental liabilities | 618,000,000 | 660,000,000 | $ 709,000,000
Environmental Matters [Abstract] |  |  |
Beginning of period | 660,000,000 | 709,000,000 | 755,000,000
Accruals for environmental matters deemed probable and reasonably estimable | 168,000,000 | 173,000,000 | 213,000,000
Environmental liability payments |  | (216,000,000) | (256,000,000)
Other | 0 | (6,000,000) | (3,000,000)
End of period | $ 618,000,000 | $ 660,000,000 | $ 709,000,000

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