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FAIR VALUE MEASUREMENTS (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Qatar ISND and ISSD |  |  |
Fair Values - Nonrecurring |  |  |
Impairments of assets | $ 416 |  |
Proved and unproved non-core Permian acreages |  |  |
Fair Values - Nonrecurring |  |  |
Pre-tax impairment charges |  | $ 397 |
Proved gas and oil properties |  |  |
Fair Values - Nonrecurring |  |  |
Pre-tax impairment charges |  |  | $ 15
Recurring | Accrued liabilities |  |  |
Liabilities: |  |  |
Netting and Collateral | 0 | 0 |
Recurring | Deferred credits and liabilities |  |  |
Liabilities: |  |  |
Netting and Collateral | 0 | 0 |
Recurring | Level 1 | Accrued liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | 0 | 0 |
Recurring | Level 1 | Deferred credits and liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | 0 | 0 |
Recurring | Level 2 | Accrued liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | 66 | 39 |
Recurring | Level 2 | Deferred credits and liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | 116 | 147 |
Recurring | Level 3 | Accrued liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | 0 | 0 |
Recurring | Level 3 | Deferred credits and liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | $ 0 | 0 |
Non recurring | Risk-Adjusted Discount Rate |  |  |
Fair Values - Nonrecurring |  |  |
Measurement input | 0.10 |  |
Fair Value | Recurring | Accrued liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | $ 66 | 39 |
Fair Value | Recurring | Deferred credits and liabilities |  |  |
Liabilities: |  |  |
Embedded derivative | $ 116 | $ 147 |

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