NET INCOME (LOSS) ATTRIBUTABLE TO NCI - Net Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
NET INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS
Net income (loss) attributable to noncontrolling interests	$ 79	$ 39	$ 5
Merian
NET INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS
Net income (loss) attributable to noncontrolling interests	78	71	69
Yanacocha
NET INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS
Net income (loss) attributable to noncontrolling interests	$ 1	(32)	(63)
Net income (loss) attributable to redeemable noncontrolling interest		$ (1)
Other
NET INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS
Net income (loss) attributable to noncontrolling interests			$ (1)