CAPITALIZED EXPLORATORY WELL COSTS - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Exploratory well costs capitalized for a period greater than one year	$ 13	$ 33	$ 33
Block 58 Offshore Suriname
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Ownership percentage by noncontrolling owners		50.00%
SURINAME
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]
Exploratory well costs capitalized for a period greater than one year			$ 28