SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Recoverable Reserves) (Details) oz in Millions, lb in Millions	Jan. 01, 2023	Jan. 01, 2019	Dec. 31, 2018 lb oz $ / lb $ / oz	Dec. 21, 2018
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated recoverable proven and probable copper reserves in leach stockpiles (in pounds)			2,000
Estimated recoverable proven and probable copper reserves in mill stockpiles (in pounds)			600
Copper
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			124,000
Copper | Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Long Term Average Price Used To Estimate Recoverable Reserves | $ / lb			2.00
Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			30.8
Long Term Average Price Used To Estimate Recoverable Reserves | $ / oz			1,000
Molybdenum mines
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			3,830
Long Term Average Price Used To Estimate Recoverable Reserves | $ / lb			10
Silver
Estimated Recoverable Proven and Probable Reserves [Line Items]
Long Term Average Price Used To Estimate Recoverable Reserves | $ / oz			15
Net Equity Interest [Member] | Copper
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			86,800
Net Equity Interest [Member] | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			17.0
Net Equity Interest [Member] | Molybdenum mines
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			3,440
Net Equity Interest [Member] | Silver
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			269.3
Consolidated Basis [Member] | Copper
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			119,600
Consolidated Basis [Member] | Copper | North America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			49,900
Consolidated Basis [Member] | Copper | South America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			33,500
Consolidated Basis [Member] | Copper | Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			36,200
Consolidated Basis [Member] | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			30.8
Consolidated Basis [Member] | Gold (ounces) [Member] | North America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			0.6
Consolidated Basis [Member] | Gold (ounces) [Member] | South America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			0.0
Consolidated Basis [Member] | Gold (ounces) [Member] | Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			30.2
Consolidated Basis [Member] | Molybdenum mines
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			3,780
Consolidated Basis [Member] | Molybdenum mines | North America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			3,060
Consolidated Basis [Member] | Molybdenum mines | South America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			720
Consolidated Basis [Member] | Molybdenum mines | Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			0
Consolidated Basis [Member] | Silver
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			393.1
PT Freeport Indonesia [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Ownership percentage of subsidiary			48.76%
PT Freeport Indonesia [Member] | Rio Tinto Share In Joint Venture | Consolidated Basis [Member] | Copper
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			13,000
PT Freeport Indonesia [Member] | Rio Tinto Share In Joint Venture | Consolidated Basis [Member] | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			10.1
PT Freeport Indonesia [Member] | Rio Tinto Share In Joint Venture | Consolidated Basis [Member] | Silver
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			55.7
PT Freeport Indonesia [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Ownership percentage of subsidiary				48.76%
Scenario, Forecast [Member] | PT Freeport Indonesia [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Ownership percentage of subsidiary	49.00%	81.00%