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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ASSET IMPAIRMENTS (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Summary of significant accounting policies |  |  |  |
Crude oil supply agreements termination costs | $ 160 |  |  | $ 160
Other impairments |  |  |  | 619
Qatar ISND and ISSD |  |  |  |
Summary of significant accounting policies |  |  |  |
Impairments of assets |  | $ 416 |  |
Net proved property balance |  | 149 |  |
Oman |  |  |  |
Summary of significant accounting policies |  |  |  |
Net proved property balance |  | 1,700 |  |
Proved and unproved non-core Permian |  |  |  |
Summary of significant accounting policies |  |  |  |
Impairments of assets |  |  | $ 397 |
Libya |  |  |  |
Summary of significant accounting policies |  |  |  |
Impairments of assets |  |  |  | $ 46
Midstream and Marketing |  |  |  |
Summary of significant accounting policies |  |  |  |
Impairments of assets |  | $ 100 |  |
Other asset impairment related charges |  |  | $ 120 |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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- Definition Oil and gas properties net of accumulated depreciation, depletion, amortization, impairment, and abandonment, carried under the successful effort method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(b)) -URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862 + Details
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