OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued operating expenses	$ 92	$ 91
Accrued exploration and development	151	167
Accrued compensation and benefits	91	170
Accrued interest	138	140
Accrued income taxes	41	25
Current asset retirement obligation	56	56
Current operating lease liability	105	116
Other	103	97
Total Other current liabilities	$ 777	$ 862