SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Recoverable Reserves) (Details) oz in Millions, lb in Millions	120 Months Ended
	Dec. 31, 2031	Feb. 15, 2022	Dec. 31, 2021 oz lb $ / lb $ / oz	Dec. 21, 2018
Copper
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			110,800
Long Term Average Price Used To Estimate Recoverable Reserves | $ / lb			2.50
Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			27.1
Long Term Average Price Used To Estimate Recoverable Reserves | $ / oz			1,200
Molybdenum mines
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			3,430
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			76,200
Net Equity Interest [Member] | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			14.2
Net Equity Interest [Member] | Molybdenum mines
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			3,060
Net Equity Interest [Member] | Silver
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			230.0
Consolidated Basis [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated recoverable proven and probable copper reserves in leach stockpiles (in pounds)			1,800
Estimated recoverable proven and probable copper reserves in mill stockpiles (in pounds)			300
Consolidated Basis [Member] | Copper
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			107,200
Consolidated Basis [Member] | Copper | North America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			43,000
Consolidated Basis [Member] | Copper | South America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			31,900
Consolidated Basis [Member] | Copper | Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			32,200
Consolidated Basis [Member] | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			27.1
Consolidated Basis [Member] | Gold (ounces) [Member] | North America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves | oz			0.5
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			26.6
Consolidated Basis [Member] | Molybdenum mines
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			3,390
Consolidated Basis [Member] | Molybdenum mines | North America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			2,690
Consolidated Basis [Member] | Molybdenum mines | South America
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimated Recoverable Proven And Probable Reserves			690
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			346.0
PT Freeport Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Ownership percentage of subsidiary				48.76%
PT Freeport Indonesia | PT Freeport Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Ownership percentage of subsidiary			48.76%
Forecast | PT-FI
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimate of proven and probable mineral reserves to be mined	0.48
Forecast | PT-FI | Copper
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimate of proven and probable mineral reserves to be mined	0.53
Forecast | PT-FI | Gold (ounces) [Member]
Estimated Recoverable Proven and Probable Reserves [Line Items]
Estimate of proven and probable mineral reserves to be mined	0.55
Forecast | PT Freeport Indonesia
Estimated Recoverable Proven and Probable Reserves [Line Items]
Ownership percentage of subsidiary		81.00%