OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES - Joint Venture (Details) lb in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) lb	Dec. 31, 2022 USD ($) lb	Dec. 31, 2021 USD ($)	Apr. 30, 2021	Apr. 29, 2021
Summary of investment holdings [Line Items]
Equity in affiliated companies’ net earnings	$ 15	$ 31	$ 5
Sumitomo Metal Mining Co., Ltd.
Summary of investment holdings [Line Items]
Accounts Receivable, after Allowance for Credit Loss		$ 25
SMM Morenci Inc.
Summary of investment holdings [Line Items]
Dollar value of pounds purchased from Sumitomo	$ 245
Freeport-McMoRan Corporation
Summary of investment holdings [Line Items]
Number of pounds of copper purchased from Sumitomo (in pounds) | lb	46	62
Sumitomo Metal Mining, Ltd. and SMM Morenci Inc.
Summary of investment holdings [Line Items]
Dollar value of pounds purchased from Sumitomo	$ 177
Accounts Receivable, after Allowance for Credit Loss	17
PT Freeport Indonesia | PT Smelting
Summary of investment holdings [Line Items]
Equity in affiliated companies’ net earnings	$ 10	$ 24	$ 6
Morenci
Summary of investment holdings [Line Items]
Ownership percentage	72.00%
Ownership percentage	28.00%
Morenci | Sumitomo Metal Mining Co., Ltd.
Summary of investment holdings [Line Items]
Ownership percentage	15.00%
Morenci | SMM Morenci Inc.
Summary of investment holdings [Line Items]
Ownership percentage	13.00%
PT Smelting
Summary of investment holdings [Line Items]
Ownership percentage				39.50%	25.00%
Equity in affiliated companies’ net earnings		$ 112
PT Smelting | PT Freeport Indonesia
Summary of investment holdings [Line Items]
Ownership percentage	39.50%
PT Smelting | Mitsubishi Materials Corporation
Summary of investment holdings [Line Items]
Ownership percentage	60.50%