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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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