BUSINESS SEGMENTS INFORMATION (Business Segments Narrative) (Details)	4 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2023
Inventory, Copper Metal Production | Product Concentration Risk | Morenci
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		14.00%
Inventory, Copper Metal Production | Product Concentration Risk | Cerro Verde
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		23.00%
Inventory, Copper Metal Production | Product Concentration Risk | Grasberg Segment [Member]
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		99.00%
North America | Inventory, Copper Metal Production | Product Concentration Risk | Morenci
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		43.00%
North America | Cost of Goods, Product Line | Supplier Concentration Risk | Atlantic Copper Smelting & Refining
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		3.00%
South America | Inventory, Copper Metal Production | Product Concentration Risk | Cerro Verde
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		82.00%
South America | Inventory, Copper Metal Production | Product Concentration Risk | Grasberg Segment [Member]
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		39.00%
South America | Cost of Goods, Product Line | Supplier Concentration Risk | Atlantic Copper Smelting & Refining
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		17.00%
Indonesia | Cost of Goods, Product Line | Supplier Concentration Risk | Atlantic Copper Smelting & Refining
Mining Segment Reporting Information [Line Items]
Concentration risk percentage		20.00%
PT Smelting
Mining Segment Reporting Information [Line Items]
Deferred intercompany profit	25.00%	39.50%