OTHER CURRENT LIABILITIES (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accrued operating expenses	$ 79	$ 72
Accrued exploration and development	660	680
Accrued gathering, transmission, and processing	67	122
Accrued compensation and benefits	147	115
Accrued interest	99	145
Accrued income taxes	89	55
Current asset retirement obligation	38	43
Other	134	141
Total other current liabilities	$ 1,313	$ 1,373