CONTINGENCIES (Tax and Other Matters) (Details) - USD ($) $ in Millions	1 Months Ended			12 Months Ended
	May 31, 2023	Dec. 31, 2022	Jan. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jul. 15, 2023	Mar. 31, 2022	Jan. 31, 2022
Income Tax Examination [Line Items]
Long-term receivable for taxes		$ 54.0		$ 70.0	$ 54.0
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization				13,627.0	13,070.0	$ 12,032.0
Export Duties Expense				307.0	325.0	218.0
Administrative Fees Expense				$ 55.0	41.0	16.0
Other Commitment, Escrow Account, Smelter Development Progress, Percent	90.00%
Export Duties, Smelter Development Progress, Percent				90.50%
Surety Bond
Income Tax Examination [Line Items]
Guarantor obligations, carrying value				$ 497.0
PT-FI
Income Tax Examination [Line Items]
Progressive export duty on copper concentrates, lower threshold, percent		2.50%		2.50%
Progressive export duty on copper concentrates, higher threshold, percent		5.00%		5.00%
Export Duties Expense				$ 324.0	307.0	$ 218.0
Loss contingency, loss in period					16.0
Administrative Fees Expense			$ 149.0
Income tax examination, assessments, penalties and interest not accrued				117.0
Loss contingency, estimate of possible loss							$ 55.0	$ 41.0	$ 57.0
PT-FI | Surety Bond | Construction Contracts
Income Tax Examination [Line Items]
Escrow Deposit	$ 10.0
Cerro Verde
Income Tax Examination [Line Items]
Income tax examination, assessments, penalties and interest not accrued				242.0
FCX Affiliates | Settled Litigation | Louisiana Parishes Coastal Erosion Cases | Maximum
Income Tax Examination [Line Items]
Settlement amount				23.5
Cyprus Mines
Income Tax Examination [Line Items]
Settlement amount			$ 130.0
Cyprus Mines | Minimum
Income Tax Examination [Line Items]
Increase (Decrease) In Litigation Settlement, Amount Awarded To Other Party				65.0
Cyprus Mines | Maximum
Income Tax Examination [Line Items]
Increase (Decrease) In Litigation Settlement, Amount Awarded To Other Party				195.0
SUNAT | PT-FI
Income Tax Examination [Line Items]
Long-term receivable for taxes				189.0
Increase (decrease) in income taxes receivable				179.0
SUNAT | Cerro Verde
Income Tax Examination [Line Items]
Long-term receivable for taxes				820.0
Increase (decrease) in income taxes receivable				546.0
Indonesian Supreme Court | PT-FI | The year 2005 and the year 2007
Income Tax Examination [Line Items]
Loss contingency, loss in period				43.0
Cerro Verde
Income Tax Examination [Line Items]
Long-term receivable for taxes		$ 333.0		274.0	333.0
PT-FI
Income Tax Examination [Line Items]
Long-term receivable for taxes		$ 12.0		$ 10.0	$ 12.0