SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Ore Reserves) (Details) oz in Millions, lb in Millions, T in Millions	Dec. 31, 2022 oz T lb g
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	18,528
Consolidated Basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	17,158
Net Equity Interest [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore)	14,007
Productive Land [Member] | Morenci
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	4,895
Average ore grade of copper per metric ton	23.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.01%
Productive Land [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	2,637
Average ore grade of copper per metric ton	33.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.02%
Productive Land [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	1,071
Average ore grade of copper per metric ton	40.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.00%
Productive Land [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	2,735
Average ore grade of copper per metric ton	22.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.02%
Productive Land [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	91
Average ore grade of copper per metric ton	17.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.00%
Productive Land [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	319
Average ore grade of copper per metric ton	44.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0.04
Average ore grade of molybdenum per metric ton	0.00%
Productive Land [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	0
Average ore grade of copper per metric ton	0.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.00%
Productive Land [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	51
Average ore grade of copper per metric ton	0.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.16%
Productive Land [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	151
Average ore grade of copper per metric ton	0.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.14%
Productive Land [Member] | Cerro Verde
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	4,235
Average ore grade of copper per metric ton	35.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.01%
Productive Land [Member] | El Abra
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	722
Average ore grade of copper per metric ton	42.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0
Average ore grade of molybdenum per metric ton	0.00%
Productive Land [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	49
Average ore grade of copper per metric ton	227.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0.95
Average ore grade of molybdenum per metric ton	0.00%
Productive Land [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	810
Average ore grade of copper per metric ton	110.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0.75
Average ore grade of molybdenum per metric ton	0.00%
Productive Land [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	382
Average ore grade of copper per metric ton	75.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0.62
Average ore grade of molybdenum per metric ton	0.00%
Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Amount of ore reserves (in metric tons of ore) | T	381
Average ore grade of copper per metric ton	99.00%
Average ore grade of gold per metric ton (in grams per metric ton) | g	0.88
Average ore grade of molybdenum per metric ton	0.00%
Copper
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	115,400
Copper | Consolidated Basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	111,000
Copper | Net Equity Interest [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	80,400
Copper | Productive Land [Member] | Morenci
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	15,700
Copper | Productive Land [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	16,200
Copper | Productive Land [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	7,000
Copper | Productive Land [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	11,100
Copper | Productive Land [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	300
Copper | Productive Land [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	2,600
Copper | Productive Land [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	100
Copper | Productive Land [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Copper | Productive Land [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Copper | Productive Land [Member] | Cerro Verde
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	28,000
Copper | Productive Land [Member] | El Abra
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	3,600
Copper | Productive Land [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	2,200
Copper | Productive Land [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	16,500
Copper | Productive Land [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	5,400
Copper | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	6,800
Gold
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	26.9
Gold | Consolidated Basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	26.9
Gold | Net Equity Interest [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	13.5
Gold | Productive Land [Member] | Morenci
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.2
Gold | Productive Land [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.1
Gold | Productive Land [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.3
Gold | Productive Land [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | Cerro Verde
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | El Abra
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	0.0
Gold | Productive Land [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	1.0
Gold | Productive Land [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	12.9
Gold | Productive Land [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	5.9
Gold | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz	6.5
Molybdenum
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	3,610
Molybdenum | Consolidated Basis [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	3,530
Molybdenum | Net Equity Interest [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	3,200
Molybdenum | Productive Land [Member] | Morenci
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	290
Molybdenum | Productive Land [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	910
Molybdenum | Productive Land [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Productive Land [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	1,100
Molybdenum | Productive Land [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Productive Land [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Productive Land [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Productive Land [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	160
Molybdenum | Productive Land [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	450
Molybdenum | Productive Land [Member] | Cerro Verde
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	700
Molybdenum | Productive Land [Member] | El Abra
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Productive Land [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Productive Land [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Productive Land [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
Molybdenum | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves	0
FCX | Productive Land [Member] | Morenci
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	72.00%
Amount of ore reserves (in metric tons of ore) | T	3,525
FCX | Productive Land [Member] | Bagdad [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	2,637
FCX | Productive Land [Member] | Safford [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	1,071
FCX | Productive Land [Member] | Sierrita [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	2,735
FCX | Productive Land [Member] | Tyrone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	91
FCX | Productive Land [Member] | Chino [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	319
FCX | Productive Land [Member] | Miami [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	0
FCX | Productive Land [Member] | Henderson [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	51
FCX | Productive Land [Member] | Climax [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	100.00%
Amount of ore reserves (in metric tons of ore) | T	151
FCX | Productive Land [Member] | Cerro Verde
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	53.56%
Amount of ore reserves (in metric tons of ore) | T	2,268
FCX | Productive Land [Member] | El Abra
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	51.00%
Amount of ore reserves (in metric tons of ore) | T	368
FCX | Productive Land [Member] | Big Gossan [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	48.76%
Amount of ore reserves (in metric tons of ore) | T	24
FCX | Productive Land [Member] | Grasberg block cave [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	48.76%
Amount of ore reserves (in metric tons of ore) | T	395
FCX | Productive Land [Member] | Deep Mill Level Zone [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	48.76%
Amount of ore reserves (in metric tons of ore) | T	186
FCX | Undeveloped [Member] | Kucing Liar [Member]
Ore, average ore grades and recoverable proven and probable reserves [Line Items]
FCX’s Interest	48.76%
Amount of ore reserves (in metric tons of ore) | T	186