OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES (Details) (USD $)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2013	Dec. 31, 2012
Summary of investment holdings [Line Items]
Retained earnings (accumulated deficit) of subsidiary		$ 2,742,000,000	$ 2,399,000,000
Morenci [Member]
Summary of investment holdings [Line Items]
Percentage of undivided interest owned by company		85.00%
Other North America Mines [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		100.00%
Cerro Verde [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		53.56%
El Abra [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		51.00%
Candelaria [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		80.00%
Ojos Del Salado [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		80.00%
Tenke [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		56.00%
Freeport-McMoRan Corporation [Member]
Summary of investment holdings [Line Items]
Net assets (liabilities) in subsidiary		20,300,000,000
Retained earnings (accumulated deficit) of subsidiary		(9,000,000,000)
FCX loans outstanding		0
Number of pounds of copper purchased from Sumitomo		76,000,000
Dollar value of pounds purchased from Sumitomo		253,000,000
Net receivable from Sumitomo		12,000,000	49,000,000
PT Freeport Indonesia [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		81.28%
Net assets (liabilities) in subsidiary		4,900,000,000
Retained earnings (accumulated deficit) of subsidiary		4,700,000,000
FCX loans outstanding		0
Percentage of cash flows from specified annual amounts of copper, gold and silver calculated by reference to proven and probable reserves as of 12/31/1994 (in hundredths)		100.00%
Percentage of remaining cash flows		60.00%
Reduction in Specified Copper Production Resulting from Labor and Pipeline Disruptions (in pounds)		228,000,000
Reduction in Specified Gold Production Resulting from Labor and Pipeline Disruptions (in ounces)		224,000
PT Indocopper Investama [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		100.00%
Company's indirect ownership percentage of a subsidiary through another wholly owned subsidiary		9.36%
Atlantic Copper [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		100.00%
Net assets (liabilities) in subsidiary		(148,000,000)
Retained earnings (accumulated deficit) of subsidiary		(543,000,000)
FCX loans outstanding		642,000,000
Freeport-McMoRan Oil & Gas [Member]
Summary of investment holdings [Line Items]
Company's direct ownership percentage		100.00%
Net assets (liabilities) in subsidiary		(9,800,000,000)
Retained earnings (accumulated deficit) of subsidiary		(265,000,000)
FCX loans outstanding		3,400,000,000
Rio Tinto Share In Joint Venture [Member]
Summary of investment holdings [Line Items]
Percentage interest in joint venture contract of work by third party		40.00%
Percentage of optional participation of any other future exploration costs shared by joint venture		40.00%
Percent interest in certain assets and future production per terms of the joint venture agreement	40.00%	40.00%
Payable to joint venture interests for its share of cash flows		$ 33,000,000	$ 4,000,000
Sumitomo's Share in Joint Venture [Member]
Summary of investment holdings [Line Items]
Percentage of undivided interest owned by third party		15.00%