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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Recoverable Reserves) (Details) oz in Millions, lb in Millions | Jan. 01, 2023 | Jan. 01, 2019 | Dec. 31, 2018 lb oz $ / lb $ / oz | Dec. 21, 2018
--- | --- | --- | --- | ---
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated recoverable proven and probable copper reserves in leach stockpiles (in pounds) |  |  | 2,000 |
Estimated recoverable proven and probable copper reserves in mill stockpiles (in pounds) |  |  | 600 |
Copper |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 124,000 |
Copper | Indonesia |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Long Term Average Price Used To Estimate Recoverable Reserves | $ / lb |  |  | 2.00 |
Gold (ounces) [Member] |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 30.8 |
Long Term Average Price Used To Estimate Recoverable Reserves | $ / oz |  |  | 1,000 |
Molybdenum mines |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 3,830 |
Long Term Average Price Used To Estimate Recoverable Reserves | $ / lb |  |  | 10 |
Silver |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Long Term Average Price Used To Estimate Recoverable Reserves | $ / oz |  |  | 15 |
Net Equity Interest [Member] | Copper |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 86,800 |
Net Equity Interest [Member] | Gold (ounces) [Member] |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 17.0 |
Net Equity Interest [Member] | Molybdenum mines |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 3,440 |
Net Equity Interest [Member] | Silver |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 269.3 |
Consolidated Basis [Member] | Copper |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 119,600 |
Consolidated Basis [Member] | Copper | North America |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 49,900 |
Consolidated Basis [Member] | Copper | South America |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 33,500 |
Consolidated Basis [Member] | Copper | Indonesia |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 36,200 |
Consolidated Basis [Member] | Gold (ounces) [Member] |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 30.8 |
Consolidated Basis [Member] | Gold (ounces) [Member] | North America |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 0.6 |
Consolidated Basis [Member] | Gold (ounces) [Member] | South America |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 0.0 |
Consolidated Basis [Member] | Gold (ounces) [Member] | Indonesia |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 30.2 |
Consolidated Basis [Member] | Molybdenum mines |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 3,780 |
Consolidated Basis [Member] | Molybdenum mines | North America |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 3,060 |
Consolidated Basis [Member] | Molybdenum mines | South America |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 720 |
Consolidated Basis [Member] | Molybdenum mines | Indonesia |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 0 |
Consolidated Basis [Member] | Silver |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 393.1 |
PT Freeport Indonesia [Member] |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Ownership percentage of subsidiary |  |  | 48.76% |
PT Freeport Indonesia [Member] | Rio Tinto Share In Joint Venture | Consolidated Basis [Member] | Copper |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves |  |  | 13,000 |
PT Freeport Indonesia [Member] | Rio Tinto Share In Joint Venture | Consolidated Basis [Member] | Gold (ounces) [Member] |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 10.1 |
PT Freeport Indonesia [Member] | Rio Tinto Share In Joint Venture | Consolidated Basis [Member] | Silver |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Estimated Recoverable Proven And Probable Reserves | oz |  |  | 55.7 |
PT Freeport Indonesia [Member] |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Ownership percentage of subsidiary |  |  |  | 48.76%
Scenario, Forecast [Member] | PT Freeport Indonesia [Member] |  |  |  |
Estimated Recoverable Proven and Probable Reserves [Line Items] |  |  |  |
Ownership percentage of subsidiary | 49.00% | 81.00% |  |

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