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DERIVATIVES - Fair Value (Details) - Commodity Contracts - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value of Derivatives |  |
Total derivatives | $ 0 | $ 0
Other current assets |  |
Fair Value of Derivatives |  |
Netting | (21) | (10)
Other assets |  |
Fair Value of Derivatives |  |
Netting | (63) | 0
Accrued liabilities |  |
Fair Value of Derivatives |  |
Netting | 21 | 10
Other long-term liabilities |  |
Fair Value of Derivatives |  |
Netting | 63 | 0
Gross Amounts at Fair Value |  |
Fair Value of Derivatives |  |
Total derivatives | (56) | 35
Gross Amounts at Fair Value | Other current assets |  |
Fair Value of Derivatives |  |
Gross Amounts at Fair Value | 21 | 49
Gross Amounts at Fair Value | Other assets |  |
Fair Value of Derivatives |  |
Gross Amounts at Fair Value | 63 | 1
Gross Amounts at Fair Value | Accrued liabilities |  |
Fair Value of Derivatives |  |
Gross Amounts at Fair Value | (71) | (15)
Gross Amounts at Fair Value | Other long-term liabilities |  |
Fair Value of Derivatives |  |
Gross Amounts at Fair Value | (69) | 0
Net Fair Value |  |
Fair Value of Derivatives |  |
Total derivatives | (56) | 35
Net Fair Value | Other current assets |  |
Fair Value of Derivatives |  |
Net Fair Value | 0 | 39
Net Fair Value | Other assets |  |
Fair Value of Derivatives |  |
Net Fair Value | 0 | 1
Net Fair Value | Accrued liabilities |  |
Fair Value of Derivatives |  |
Net Fair Value | (50) | (5)
Net Fair Value | Other long-term liabilities |  |
Fair Value of Derivatives |  |
Net Fair Value | $ (6) | $ 0

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