OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued operating expenses	$ 139	$ 143
Accrued exploration and development	216	319
Accrued gathering, processing, and transmission - Altus	1	17
Accrued compensation and benefits	107	212
Accrued interest	130	135
Accrued income taxes	33	51
Current asset retirement obligation	47	47
Current operating lease liability	123	169
Current derivative liability	97	0
Other	64	56
Total Other current liabilities	$ 957	$ 1,149
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent