OTHER CURRENT LIABILITIES (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued operating expenses	$ 187	$ 65
Accrued exploration and development	355	667
Accrued gathering, processing, and transmission - Altus	25	81
Accrued compensation and benefits	171	177
Accrued interest	114	137
Accrued income taxes	80	58
Current asset retirement obligation	66	66
Current operating lease liability	149
Other	94	90
Total other current liabilities	$ 1,241	$ 1,341