BUSINESS SEGMENTS INFORMATION (Product Revenue) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Product revenue [Line Items]
Revenues	$ 22,845	$ 14,198	$ 14,402
Treatment and refining charges included in copper concentrates revenues	(445)	(362)	(404)
Royalty Expense	(330)	(165)	(113)
Export Duties Expense	(218)	(92)	(221)
Revenue from Contract with Customer, Excluding Assessed Tax	22,422	13,894	14,348
Copper in concentrate
Product revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	8,705	4,294	4,566
Rod and other refined copper products
Product revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	3,369	2,052	2,110
Purchased Copper [Member]
Product revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	757	821	1,060
Copper Cathode
Product revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	5,900	4,204	3,656
Gold
Product revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	2,580	1,702	1,620
Molybdenum
Product revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	1,283	848	1,169
Other
Product revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	821	592	905
Derivatives Not Designated as Hedging Instruments | Sales [Member]
Product revenue [Line Items]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	423	304	54
PT Freeport Indonesia
Product revenue [Line Items]
Royalty Expense	(319)	(160)	(106)
Export Duties Expense	(218)	(92)	$ (66)
Export Duties Expense	$ (16)
Indonesia Tax Authority | PT Freeport Indonesia | Memorandum of Understanding with the Indonesian Government, Indonesia Supreme Court Appeal
Product revenue [Line Items]
Export Duties Expense		$ (155)