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INDUSTRY SEGMENTS AND GEOGRAPHIC AREAS - RESULTS OF OPERATIONS (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Segment Reporting [Abstract] |  |  |
Number of operating segments | segment | 3 |  |
Segment Information |  |  |
Net sales | $ 20,393 | $ 17,824 | $ 12,508
Income (loss) from continuing operations before income taxes | 186 | 5,608 | 1,328
Income tax expense | (693) | (1,477) | (17)
Income (loss) from continuing operations | (507) | 4,131 | 1,311
INVESTMENTS IN UNCONSOLIDATED ENTITIES | 6,389 | 1,680 | 1,515
Property, plant and equipment additions | 6,441 | 5,020 | 3,651
Depreciation, depletion and amortization | 5,981 | 3,977 | 4,002
Total assets | 109,330 | 43,854 | 42,026
Pre-tax impairment and related charges on domestic undeveloped leases | 285 |  |
Impairments of assets | 285 |  |
Employee severance and related costs | 1,000 |  |
Crucial seismic data | 401 |  |
Bank, legal and consulting fees | 213 |  |
Tax effect of pre-tax adjustments | (245) | 198 | (392)
Qatar ISND and ISSD |  |  |
Segment Information |  |  |
Impairments of assets |  | 416 |
Marketing and Midstream |  |  |
Segment Information |  |  |
Impairments of assets |  | 100 |
Marketing and Midstream | Non Core Midstream Assets |  |  |
Segment Information |  |  |
Pre-tax net gain from divestiture |  | 907 |
Operating segments | Oil and Gas |  |  |
Segment Information |  |  |
Net sales | 13,423 | 10,441 | 7,870
Income (loss) from continuing operations before income taxes | 2,352 | 2,442 | 1,111
Income tax expense | 0 | 0 | 0
Income (loss) from continuing operations | 2,352 | 2,442 | 1,111
INVESTMENTS IN UNCONSOLIDATED ENTITIES | 181 | 0 | 0
Property, plant and equipment additions | 5,559 | 4,443 | 2,968
Depreciation, depletion and amortization | 4,994 | 3,254 | 3,269
Total assets | 77,936 | 24,874 | 23,595
Gain on sale | 475 |  |
Impairment charges | 285 |  |
Pre-tax impairment and related charges on domestic undeveloped leases | 39 |  |
Operating segments | Oil and Gas | South Texas and non-core acreage in the Permian basin |  |  |
Segment Information |  |  |
Pre-tax gain on sale of properties |  |  | 655
Operating segments | Oil and Gas | Non-core Permian acreage |  |  |
Segment Information |  |  |
Impairment charges |  |  | 397
Operating segments | Chemical |  |  |
Segment Information |  |  |
Net sales | 4,102 | 4,657 | 4,355
Income (loss) from continuing operations before income taxes | 799 | 1,159 | 822
Income tax expense | 0 | 0 | 0
Income (loss) from continuing operations | 799 | 1,159 | 822
INVESTMENTS IN UNCONSOLIDATED ENTITIES | 689 | 733 | 771
Property, plant and equipment additions | 272 | 277 | 323
Depreciation, depletion and amortization | 368 | 354 | 352
Total assets | 4,361 | 4,359 | 4,364
Operating segments | Marketing and Midstream |  |  |
Segment Information |  |  |
Net sales | 4,132 | 3,656 | 1,157
Income (loss) from continuing operations before income taxes | 241 | 2,802 | 85
Income tax expense | 0 | 0 | 0
Income (loss) from continuing operations | 241 | 2,802 | 85
INVESTMENTS IN UNCONSOLIDATED ENTITIES | 5,519 | 947 | 739
Property, plant and equipment additions | 475 | 221 | 296
Depreciation, depletion and amortization | 563 | 331 | 340
Total assets | 17,055 | 11,087 | 11,775
Charge upon loss of control | 1,000 |  |
Gain on sale of equity investment | 114 |  |
Impairment charges |  |  | 120
Operating segments | Marketing and Midstream | Interest Rate Swaps |  |  |
Segment Information |  |  |
Mark to market gain on interest rate swap | 30 |  |
Corporate and Eliminations |  |  |
Segment Information |  |  |
Net sales | (1,264) | (930) | (874)
Income (loss) from continuing operations before income taxes | (3,206) | (795) | (690)
Income tax expense | (693) | (1,477) | (17)
Income (loss) from continuing operations | (3,899) | (2,272) | (707)
INVESTMENTS IN UNCONSOLIDATED ENTITIES | 0 | 0 | 5
Property, plant and equipment additions | 135 | 79 | 64
Depreciation, depletion and amortization | 56 | 38 | 41
Total assets | $ 9,978 | $ 3,534 | $ 2,292

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