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INVESTMENTS AND RELATED-PARTY TRANSACTIONS (Details) shares in Millions, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2014 shares | Mar. 31, 2016 USD ($) shares | Nov. 30, 2014 USD ($) shares | Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
RELATED-PARTY TRANSACTIONS |  |  |  |  |  |
Sales to related parties |  |  |  | $ 602 | $ 555 | $ 835
Purchases from related parties |  |  |  | 7 | 26 | 6
Services |  |  |  | 17 | 32 | 27
Advances and amounts due from related parties |  |  |  | 59 | 60 | 26
Amounts due to related parties |  |  |  |  | 5 | 15
Equity Method Investments |  |  |  |  |  |
Equity method investment amounts |  |  |  | 1,401 | 1,267 | 1,171
Equity investments dividends paid |  |  |  | 224 | 438 | 396
Excess of investments in equity investees over the underlying equity in net assets |  |  |  | 653 |  |
Excess of investments in equity investees over the underlying equity in net assets, which represents goodwill |  |  |  | 537 |  |
Equity-method investments financial information summarized by Income Statement line item |  |  |  |  |  |
Revenues |  |  |  | 1,238 | 1,050 | 3,090
Costs and expenses |  |  |  | 1,043 | 827 | 2,774
Net income |  |  |  | 195 | 223 | $ 316
Equity-method investments financial information summarized by Balance Sheet line item |  |  |  |  |  |
Current assets |  |  |  | 914 | 896 |
Non-current assets |  |  |  | 3,605 | 3,589 |
Current liabilities |  |  |  | 577 | 536 |
Long-term debt |  |  |  | 1,957 | 2,141 |
Other non-current liabilities |  |  |  | 159 | 149 |
Stockholders' equity |  |  |  | $ 1,826 | $ 1,659 |
General Partner of Plains All American Pipeline,L.P |  |  |  |  |  |
EQUITY INVESTMENTS |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  | 12.00% |  |
Proceeds from sale |  |  | $ 1,700 |  |  |
Gain on sale of equity investments |  |  | $ 1,400 |  |  |
RELATED-PARTY TRANSACTIONS |  |  |  |  |  |
Sales to related party (as a percent) |  |  |  | 89.00% | 87.00% | 46.00%
California Resource Corporation |  |  |  |  |  |
EQUITY INVESTMENTS |  |  |  |  |  |
Interest in investment recorded as available for sale asset (as a percent) | 18.70% |  |  |  |  |
Shares owned by Occidental | shares | 71.5 |  | 71.5 |  |  |
Other than temporary loss |  | $ 78 |  |  | $ 227 |
Available for sale investment |  |  |  |  | $ 167 |
California Resource Corporation | Stock dividend distribution |  |  |  |  |  |
EQUITY INVESTMENTS |  |  |  |  |  |
Stock dividend, shares distributed | shares |  | 71.5 |  |  |  |
Dolphin Energy |  |  |  |  |  |
EQUITY INVESTMENTS |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  | 24.50% |  |
Ownership interest (as a percent) |  |  |  | 24.50% |  |
Number of separate economic interests comprising investment in unconsolidated affiliate | item |  |  |  | 2 |  |

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