CONTINGENCIES (Royalty Dispute Schedule) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended				27 Months Ended	36 Months Ended	57 Months Ended
	Dec. 31, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2013	Dec. 31, 2019	Sep. 01, 2011
Loss Contingencies [Line Items]
Production and delivery		$ 10,031	$ 11,534	$ 11,708
Interest expense, net		598	620	945
Provision for (benefit from) income taxes		(944)	(510)	(991)
Net income from continuing operations attributable to noncontrolling interests		$ (266)	(50)	(292)
Disputed Royalty Assessments						$ 69		$ 175
Royalty Related Gains				16
Royalties, Pre-tax Gains				14
Royalties, Related Tax Benefits				17
Royalties, Tax Benefits Attributable to Non-controlling Interests				15
Disputed Royalty Assessments, Tax Expenses						136
Disputed Royalty Assessments, Mining Related Tax Expenses						$ 67
Disputed Royalty Assessment, Prior Tax Benefit	$ 129
Cerro Verde | Cerro Verde Royalty Dispute | Royalty Assessments
Loss Contingencies [Line Items]
Production and delivery			6	14	$ 203		$ 223
Interest expense, net			10	370	145		525
Other expense			0	22	0		22
Provision for (benefit from) income taxes			2	35	(7)		30
Net income from continuing operations attributable to noncontrolling interests			7	176	169		352
Loss contingency, loss In period, attributable to parent			$ 7	195	$ 186		$ 388
Judicial Ruling | December 2006 to Tax Year 2013 | Cerro Verde Royalty Dispute | Unfavorable Regulatory Actions
Loss Contingencies [Line Items]
Provision for (benefit from) income taxes				$ 35