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INVESTMENTS AND RELATED-PARTY TRANSACTIONS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Equity Method Investments |  |  |
Equity method investment amounts | $ 6,389 | $ 1,680 | $ 1,515
Equity investments dividends paid | 422 | 329 | 297
Excess of investments in equity investees over the underlying equity in net assets | 3,600 |  |
Excess of investments in equity investees over the underlying equity in net assets, which represents goodwill | 1,500 |  |
Equity-method investments financial information summarized by Income Statement line item |  |  |
Revenues and other income | 26,520 | 28,091 | 13,843
Costs and expenses | 24,084 | 25,029 | 12,230
Net income | 2,436 | 3,062 | 1,613
Equity-method investments financial information summarized by Balance Sheet line item |  |  |
Current assets | 1,130 | 5,587 | 5,754
Non-current assets | 21,158 | 25,871 | 25,108
Current liabilities | 785 | 4,879 | 4,479
Long-term debt | 8,673 | 12,505 | 14,091
Other non-current liabilities | 859 | 95 | 414
Stockholders’ equity | 11,971 | 13,979 | 11,878
RELATED-PARTY TRANSACTIONS |  |  |
Sales | 691 | 805 | 636
Purchases | 463 | 502 | 387
Services | 28 | 52 | 38
Advances and amounts due from related parties | 133 | 63 | 63
Amounts due to related parties | $ 463 | $ 46 | $ 45
Note payable | WES |  |  |
RELATED-PARTY TRANSACTIONS |  |  |
Debt instrument interest rate stated percentage | 6.50% |  |
Anadarko Petroleum Corporation |  |  |
Equity Method Investments |  |  |
Equity method investment amounts | $ 2,800 |  |
Note payable | 2,800 |  |
WES |  |  |
Equity Method Investments |  |  |
Equity method investment amounts | $ 5,128 |  |
Equity method investment ownership percentage | 56.30% |  |
OxyChem Ingleside Facility |  |  |
Equity Method Investments |  |  |
Equity method investment amounts | $ 679 |  |
Equity method investment ownership percentage | 50.00% |  |
Dolphin Energy Limited |  |  |
Equity Method Investments |  |  |
Equity method investment amounts | $ 240 |  |
Equity method investment ownership percentage | 24.50% |  |
Other |  |  |
Equity Method Investments |  |  |
Equity method investment amounts | $ 342 |  |
General Partner of Plains All American Pipeline, L.P |  |  |
Equity Method Investments |  |  |
Ownership interest (as a percent) |  | 11.00% |
RELATED-PARTY TRANSACTIONS |  |  |
Sales to related party (as a percent) | 87.00% | 89.00% | 86.00%
Plains All American Pipeline, LP |  |  |
Equity Method Investments |  |  |
Ownership interest (as a percent) |  | 40.00% |
Ingleside Ethylene LLC |  |  |
RELATED-PARTY TRANSACTIONS |  |  |
Purchases from related party (as a percent) | 98.00% | 98.00% |

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