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ACQUISITIONS AND DIVESTITURES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2018
Jun. 30, 2017
Business Acquisition [Line Items]            
Leasehold and property acquisitions         $ 38 $ 67
Proceeds from sale of Midale and House Mountain         0 228
North America onshore regions            
Business Acquisition [Line Items]            
Leasehold and property acquisitions   $ 26 $ 18   38 67
Permian region            
Business Acquisition [Line Items]            
Proceeds from sale of non-core assets         13 522
Gains on sale of non-core assets         $ 9 $ 372
Refundable deposits for sale of non-core assets       $ 40    
Apache Canada Ltd. (ACL) | Disposed of by Sale            
Business Acquisition [Line Items]            
Proceeds from sale of Midale and House Mountain $ 228          
Disposal Group, Midale and House Mountain | Disposed of by Sale            
Business Acquisition [Line Items]            
Loss on disposition of assets     $ 52