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FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Midstream |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax impairment charges | $ 814 |  |  |  |
Chemical |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax impairment charges |  |  |  | $ 121 | $ 149
Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  | $ 15 | 6,500 |
Total Foreign | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 4,700 |
Oman | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 1,800 |
Iraq and Libya | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 1,300 |
Qatar | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 1,000 |
Colombia and Bolivia | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 550 |
Williston Basin | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 763 |
Piceance Basin | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 460 |
South Texas | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 554 |
Net Book Value | Midstream |  |  |  |  |
Assets: |  |  |  |  |
Net Book Value | 891 |  |  | 891 |
Net Book Value | Chemical |  |  |  |  |
Assets: |  |  |  |  |
Net Book Value | 124 |  |  | 124 |
Net Book Value | Total Foreign | Proved gas and oil properties | Oil and Gas |  |  |  |  |
Assets: |  |  |  |  |
Net Book Value | 7,359 |  |  | 7,359 |
Net Book Value | Williston Basin | Proved gas and oil properties |  |  |  |  |
Assets: |  |  |  |  |
Net Book Value |  | $ 1,378 |  |  |
Net Book Value | United States | Proved gas and oil properties | Oil and Gas |  |  |  |  |
Assets: |  |  |  |  |
Net Book Value | 1,655 |  |  | 1,655 |
Recurring | Fair Value |  |  |  |  |
Assets: |  |  |  |  |
Available for sale investment | 167 |  |  | 167 |
Recurring | Fair Value | Accrued liabilities |  |  |  |  |
Liabilities: |  |  |  |  |
Embedded derivatives | 47 |  | 43 | 47 |
Recurring | Fair Value | Deferred credits and liabilities |  |  |  |  |
Liabilities: |  |  |  |  |
Embedded derivatives | 267 |  | 178 | 267 |
Recurring | Fair Value | Level 1 |  |  |  |  |
Assets: |  |  |  |  |
Available for sale investment | 167 |  |  | 167 |
Recurring | Fair Value | Level 2 | Accrued liabilities |  |  |  |  |
Liabilities: |  |  |  |  |
Embedded derivatives | 47 |  | 43 | 47 |
Recurring | Fair Value | Level 2 | Deferred credits and liabilities |  |  |  |  |
Liabilities: |  |  |  |  |
Embedded derivatives | 267 |  | $ 178 | 267 |
Non recurring | Low end of range |  |  |  |  |
Liabilities: |  |  |  |  |
Risk adjusted discount rate |  |  | 8.00% |  |
Non recurring | High end of range |  |  |  |  |
Liabilities: |  |  |  |  |
Risk adjusted discount rate |  |  | 20.00% |  |
Non recurring | Fair Value | Midstream |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax impairment charges |  |  |  | 841 |
Non recurring | Fair Value | Chemical |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax impairment charges |  |  |  | 121 |
Non recurring | Fair Value | Total Foreign | Proved gas and oil properties | Oil and Gas |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 4,693 |
Non recurring | Fair Value | Williston Basin | Proved gas and oil properties |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  | 763 |  |  |
Non recurring | Fair Value | United States | Proved gas and oil properties | Oil and Gas |  |  |  |  |
Liabilities: |  |  |  |  |
Pre-tax Impairment Charges |  |  |  | 1,030 |
Non recurring | Fair Value | Level 3 | Midstream |  |  |  |  |
Assets: |  |  |  |  |
Assets, Fair value, nonrecurring | 50 |  |  | 50 |
Non recurring | Fair Value | Level 3 | Chemical |  |  |  |  |
Assets: |  |  |  |  |
Assets, Fair value, nonrecurring | 3 |  |  | 3 |
Non recurring | Fair Value | Level 3 | Total Foreign | Proved gas and oil properties | Oil and Gas |  |  |  |  |
Assets: |  |  |  |  |
Assets, Fair value, nonrecurring | 2,666 |  |  | 2,666 |
Non recurring | Fair Value | Level 3 | Williston Basin | Proved gas and oil properties |  |  |  |  |
Assets: |  |  |  |  |
Assets, Fair value, nonrecurring |  | $ 615 |  |  |
Non recurring | Fair Value | Level 3 | United States | Proved gas and oil properties | Oil and Gas |  |  |  |  |
Assets: |  |  |  |  |
Assets, Fair value, nonrecurring | $ 625 |  |  | $ 625 |

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