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REVENUE - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | $ 17,130 | $ 19,192
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 14,167 | 15,327
Middle East |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 2,774 | 4,204
Latin America |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 604 | 858
Other International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 343 | 67
Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | (758) | (1,264)
Oil and gas |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 11,995 | 14,048
Oil and gas | Oil |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 9,888 | 12,350
Oil and gas | NGL |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 1,055 | 941
Oil and gas | Gas |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 986 | 763
Oil and gas | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 66 | (6)
Oil and gas | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 9,048 | 9,492
Oil and gas | United States | Oil |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 7,485 | 8,411
Oil and gas | United States | NGL |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 838 | 658
Oil and gas | United States | Gas |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 660 | 424
Oil and gas | United States | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 65 | (1)
Oil and gas | Middle East |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 2,480 | 3,853
Oil and gas | Middle East | Oil |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 1,949 | 3,256
Oil and gas | Middle East | NGL |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 217 | 283
Oil and gas | Middle East | Gas |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 313 | 319
Oil and gas | Middle East | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 1 | (5)
Oil and gas | Latin America |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 467 | 703
Oil and gas | Latin America | Oil |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 454 | 683
Oil and gas | Latin America | NGL |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Latin America | Gas |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 13 | 20
Oil and gas | Latin America | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Other International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Other International | Oil |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Other International | NGL |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Other International | Gas |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Other International | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Intersegment Eliminations | Oil |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Intersegment Eliminations | NGL |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Intersegment Eliminations | Gas |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Oil and gas | Intersegment Eliminations | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Chemical |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 3,726 | 4,080
Chemical | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 3,524 | 3,858
Chemical | Middle East |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Chemical | Latin America |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 137 | 155
Chemical | Other International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 65 | 67
Chemical | Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 2,167 | 2,328
Midstream and marketing | Gas Processing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 644 | 746
Midstream and marketing | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 1,422 | 436
Midstream and marketing | WES - Gas Processing | WES |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers |  | 1,110
Midstream and marketing | Power and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 101 | 36
Midstream and marketing | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 1,595 | 1,977
Midstream and marketing | United States | Gas Processing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 350 | 395
Midstream and marketing | United States | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 1,144 | 436
Midstream and marketing | United States | WES - Gas Processing | WES |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers |  | 1,110
Midstream and marketing | United States | Power and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 101 | 36
Midstream and marketing | Middle East |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 294 | 351
Midstream and marketing | Middle East | Gas Processing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 294 | 351
Midstream and marketing | Middle East | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Middle East | WES - Gas Processing | WES |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers |  | 0
Midstream and marketing | Middle East | Power and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Latin America |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Latin America | Gas Processing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Latin America | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Latin America | WES - Gas Processing | WES |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers |  | 0
Midstream and marketing | Latin America | Power and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Other International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 278 | 0
Midstream and marketing | Other International | Gas Processing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Other International | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 278 | 0
Midstream and marketing | Other International | WES - Gas Processing | WES |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers |  | 0
Midstream and marketing | Other International | Power and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Intersegment Eliminations | Gas Processing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Intersegment Eliminations | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | 0 | 0
Midstream and marketing | Intersegment Eliminations | WES - Gas Processing | WES |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers |  | 0
Midstream and marketing | Intersegment Eliminations | Power and Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from customers | $ 0 | $ 0

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