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REVENUE - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | $ 17,824 | $ 12,508 | $ 10,090
Revenues | 15,560 |  |
United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 11,086 |  |
Middle East |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 4,388 |  |
Latin America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 936 |  |
Other International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 80 |  |
Intersegment Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | (930) |  |
Revenues | (930) |  |
Intersegment Eliminations | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Intersegment Eliminations | Middle East |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Intersegment Eliminations | Latin America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Intersegment Eliminations | Other International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 10,441 |  |
Oil and Gas Segment | Oil |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 9,245 |  |
Oil and Gas Segment | NGL |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 691 |  |
Oil and Gas Segment | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 495 |  |
Oil and Gas Segment | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 10 |  |
Oil and Gas Segment | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 5,747 |  |
Oil and Gas Segment | United States | Oil |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 5,125 |  |
Oil and Gas Segment | United States | NGL |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 430 |  |
Oil and Gas Segment | United States | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 185 |  |
Oil and Gas Segment | United States | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 7 |  |
Oil and Gas Segment | Middle East |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 3,963 |  |
Oil and Gas Segment | Middle East | Oil |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 3,405 |  |
Oil and Gas Segment | Middle East | NGL |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 261 |  |
Oil and Gas Segment | Middle East | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 294 |  |
Oil and Gas Segment | Middle East | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 3 |  |
Oil and Gas Segment | Latin America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 731 |  |
Oil and Gas Segment | Latin America | Oil |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 715 |  |
Oil and Gas Segment | Latin America | NGL |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Latin America | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 16 |  |
Oil and Gas Segment | Latin America | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Other International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Other International | Oil |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Other International | NGL |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Other International | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Other International | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Intersegment Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Intersegment Eliminations | Oil |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Intersegment Eliminations | NGL |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Intersegment Eliminations | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Oil and Gas Segment | Intersegment Eliminations | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Chemical Segment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 4,648 |  |
Chemical Segment | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 4,363 |  |
Chemical Segment | Middle East |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Chemical Segment | Latin America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 205 |  |
Chemical Segment | Other International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 80 |  |
Chemical Segment | Intersegment Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 1,401 |  |
Midstream Segment | Gas Processing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 982 |  |
Midstream Segment | Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 311 |  |
Midstream Segment | Power and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 108 |  |
Midstream Segment | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 976 |  |
Midstream Segment | United States | Gas Processing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 557 |  |
Midstream Segment | United States | Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 311 |  |
Midstream Segment | United States | Power and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 108 |  |
Midstream Segment | Middle East |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 425 |  |
Midstream Segment | Middle East | Gas Processing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 425 |  |
Midstream Segment | Middle East | Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Middle East | Power and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Latin America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Latin America | Gas Processing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Latin America | Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Latin America | Power and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Other International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Other International | Gas Processing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Other International | Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Other International | Power and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Intersegment Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Intersegment Eliminations | Gas Processing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Intersegment Eliminations | Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | 0 |  |
Midstream Segment | Intersegment Eliminations | Power and Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from customers | $ 0 |  |

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