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