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OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES (Details) oz in Millions, lb in Millions, $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2017 USD ($) lb oz | Dec. 31, 2016 USD ($) | May 31, 2016 | Dec. 31, 1994 lb oz
Summary of investment holdings [Line Items] |  |  |  |  |
Retained Earnings (accumulated deficit) |  | $ (14,722) | $ (16,540) |  |
Freeport-McMoRan Corporation [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Number of pounds of copper purchased from Sumitomo (in pounds) | lb |  | 218 |  |  |
Sumitomo Metal Mining, Ltd. and SMM Morenci Inc. [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Dollar value of pounds purchased from Sumitomo |  | $ 610 |  |  |
Due from Joint Ventures, Current |  | $ 18 |  |  |
PT-FI |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Percent interest in certain assets and future production per terms of the joint venture agreement |  | 60.00% |  |  |
Percentage of cash flows from specified annual amounts of copper, gold and silver calculated by reference to proven and probable reserves as of 12/31/1994 (in hundredths) |  | 100.00% |  |  |
Percentage of remaining cash flows |  | 60.00% |  |  |
Percentage of optional participation of any other future exploration costs shared by joint venture |  | 60.00% |  |  |
PT-FI |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Net assets (liabilities) in subsidiary |  | $ 6,300 |  |  |
Retained Earnings (accumulated deficit) |  | $ 6,000 |  |  |
Rio Tinto Share In Joint Venture [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Percent interest in certain assets and future production per terms of the joint venture agreement |  | 40.00% |  |  |
Percentage of optional participation of any other future exploration costs shared by joint venture |  | 40.00% |  |  |
Sumitomo Metal Mining Co., Ltd. [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Due from Joint Ventures, Current |  |  | 15 |  |
Copper |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) | lb |  | 103,700 |  |  |
Copper | PT-FI |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) | lb |  |  |  |  | 27,100
Gold |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) | oz |  | 34.2 |  |  |
Gold | PT-FI |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) | oz |  |  |  |  | 38.4
Silver | PT-FI |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Estimated Recoverable Proven And Probable Reserves (in pounds) | oz |  |  |  |  | 75.8
Morenci |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Ownership percentage |  | 72.00% |  |  |
Morenci | SMM Morenci Inc. [Member] |  |  |  |  |
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 |  | 16,000 |  |  |
Retained Earnings (accumulated deficit) |  | $ (14,000) |  |  |
PT-FI |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Ownership percentage |  | 81.28% |  |  |
Loans outstanding |  | $ 0 |  |  |
PT-FI | PT Indocopper Investama [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Ownership percentage |  | 9.36% |  |  |
PT-FI | Rio Tinto Share In Joint Venture [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Percentage interest in joint venture contract of work by third party |  | 40.00% |  |  |
Optional Participation Of Future Exploration Costs Shared By Joint Venture Percentage |  | 40.00% |  |  |
Atlantic Copper [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Ownership percentage |  | 100.00% |  |  |
Net assets (liabilities) in subsidiary |  | $ (40) |  |  |
Retained Earnings (accumulated deficit) |  | (452) |  |  |
Loans outstanding |  | $ 365 |  |  |
Freeport-McMoRan Oil & Gas |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Ownership percentage |  | 100.00% |  |  |
Net assets (liabilities) in subsidiary |  | $ (13,700) |  |  |
Retained Earnings (accumulated deficit) |  | (25,300) |  |  |
Loans outstanding |  | 9,900 |  |  |
Rio Tinto [Member] | Co-venturer [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Due to Related Parties, Current |  | $ 30 | $ 10 |  |
Scenario, Forecast [Member] | Rio Tinto Share In Joint Venture [Member] |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Percent interest in certain assets and future production per terms of the joint venture agreement | 40.00% |  |  |  |
Morenci |  |  |  |  |
Summary of investment holdings [Line Items] |  |  |  |  |
Ownership percentage |  |  |  | 85.00% |
Morenci | SMM Morenci Inc. [Member] |  |  |  |  |
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% |

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