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OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES (Details) oz in Millions, lb in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2020 USD ($) lb oz	Jan. 01, 2023	Dec. 31, 2019 USD ($)	Dec. 21, 2018	May 31, 2016
Summary of investment holdings [Line Items]
Retained Earnings (accumulated deficit)		$ (11,681,000,000)		$ (12,280,000,000)
Rio Tinto
Summary of investment holdings [Line Items]
Ownership percentage					100.00%
Freeport-McMoRan Corporation [Member]
Summary of investment holdings [Line Items]
Number of pounds of copper purchased from Sumitomo (in pounds) | lb		146
Sumitomo Metal Mining, Ltd. and SMM Morenci Inc. [Member]
Summary of investment holdings [Line Items]
Dollar value of pounds purchased from Sumitomo		$ 409,000,000
Due from Joint Ventures, Current		15,000,000
PT-FI
Summary of investment holdings [Line Items]
Net assets (liabilities) in subsidiary		11,400,000,000
Retained Earnings (accumulated deficit)		$ 7,200,000,000
Rio Tinto Share In Joint Venture
Summary of investment holdings [Line Items]
Percent interest in certain assets and future production per terms of the joint venture agreement		40.00%
Sumitomo Metal Mining Co., Ltd. [Member]
Summary of investment holdings [Line Items]
Due from Joint Ventures, Current				$ 19,000,000
Copper
Summary of investment holdings [Line Items]
Estimated Recoverable Proven And Probable Reserves (in pounds) | lb		117,200
Gold
Summary of investment holdings [Line Items]
Estimated Recoverable Proven And Probable Reserves (in pounds) | oz		28.9
Morenci
Summary of investment holdings [Line Items]
Ownership percentage		72.00%
Ownership percentage		28.00%
Morenci | SMM Morenci Inc.
Summary of investment holdings [Line Items]
Ownership percentage						13.00%
Morenci | Sumitomo Metal Mining Co., Ltd. [Member]
Summary of investment holdings [Line Items]
Ownership percentage		15.00%
Cerro Verde [Member]
Summary of investment holdings [Line Items]
Ownership percentage		53.56%
Other North America Mines [Member]
Summary of investment holdings [Line Items]
Ownership percentage		100.00%
El Abra [Member]
Summary of investment holdings [Line Items]
Ownership percentage		51.00%
PT Indocopper Investama [Member]
Summary of investment holdings [Line Items]
Ownership percentage					100.00%
Freeport Minerals Corporation [Member]
Summary of investment holdings [Line Items]
Loans outstanding		$ 0
Freeport Minerals Corporation [Member] | Subsidiaries [Member]
Summary of investment holdings [Line Items]
Net assets (liabilities) in subsidiary		15,000,000,000.0
Retained Earnings (accumulated deficit)		$ (15,700,000,000)
PT-FI
Summary of investment holdings [Line Items]
Ownership percentage		48.76%			81.28%
Loans outstanding		$ 539,000,000
PT-FI | PT Indocopper Investama [Member]
Summary of investment holdings [Line Items]
Ownership percentage					9.36%
PT-FI | PT Freeport Indonesia, Subsidiary
Summary of investment holdings [Line Items]
Ownership percentage					19.00%
Atlantic Copper [Member]
Summary of investment holdings [Line Items]
Ownership percentage		100.00%
Net assets (liabilities) in subsidiary		$ 145,000,000
Retained Earnings (accumulated deficit)		(406,000,000)
Loans outstanding		$ 56,000,000
Forecast [Member] | Rio Tinto Share In Joint Venture
Summary of investment holdings [Line Items]
Percent interest in certain assets and future production per terms of the joint venture agreement	40.00%
Forecast [Member] | PT-FI
Summary of investment holdings [Line Items]
Ownership percentage			48.76%

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