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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]  
Schedule of Non-cash Impairments of Proved and Unproved Property and Equipment
The following table represents non-cash impairments of the carrying value of the Company’s proved and unproved property and equipment for the second quarters and first six months of 2018 and 2017:
 
 
For the Quarter Ended June 30,
 
For the Six Months Ended June 30,
 
 
2018
 
2017
 
2018
 
2017
 
 
(In millions)
Oil and Gas Property:
 
 
 
 
 
 
 
 
Proved
 
$

 
$

 
$

 
$

Unproved
 
21

 
39

 
37

 
54