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DISPOSITIONS AND ACQUISITIONS (PT-FI Divestment) (Details) - USD ($) $ in Millions |  | 12 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 21, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Jan. 01, 2023 | Jan. 01, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from divestiture, net | $ 350 |  |  |  |  |  |
Accounts payable and accrued liabilities |  | $ 2,269 | $ 2,491 |  | $ 2,269 |  |
Net income (loss) |  | 865 | (189) | $ 2,894 |  |  |
Other current assets |  | 341 | 655 |  | 341 |  |
Property, plant, equipment and mine development costs, net |  | 29,818 | 29,584 |  | 29,818 |  |
Deferred Income Tax Liabilities, Net |  | 4,408 | 4,210 |  | 4,408 |  |
Noncontrolling interests |  | 8,494 | 8,150 |  | 8,494 |  |
Capital in excess of par value |  | $ 26,037 | 25,830 |  | $ 26,037 |  |
Rio Tinto Share In Joint Venture |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from divestiture, net | $ 107 |  |  |  |  |  |
PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage | 81.28% | 48.76% |  |  | 48.76% |  |
Net income (loss) |  | $ 765 | 203 |  | $ 425 |  |
Net Income (Loss) Attributable to Parent |  | $ 621 | $ 165 |  | $ 346 |  |
PT-FI | Scenario, forecast |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 48.76% |
PT Freeport Indonesia, Subsidiary | PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage | 19.00% |  |  |  |  |  |
PT Indonesia Papua Metal dan Mineral | PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership interest by parent subsequent to business acquisition | 25.00% |  |  |  |  |  |
PT Indonesia Papua Metal dan Mineral | PT-FI | Scenario, forecast |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 25.00% |
Rio Tinto | Rio Tinto Share In Joint Venture |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from divestiture, net | $ 3,500 |  |  |  |  |  |
PT Indonesia Asahan Aluminium (Persero) (Inalum) | PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from divestiture, net | $ 3,850 |  |  |  |  |  |
PT Indonesia Asahan Aluminium (Persero) (Inalum) | Interest In PT Indocopper Investama |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Percentage of voting interest | 100.00% |  |  |  |  |  |
PT Indonesia Asahan Aluminium (Persero) (Inalum) | PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Percentage of voting interest | 40.00% |  |  |  |  |  |
Ownership interest by parent subsequent to business acquisition | 26.24% |  |  |  |  |  |
PT Indonesia Asahan Aluminium (Persero) (Inalum) | PT-FI | Scenario, forecast |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 26.24% |
PT-FI | PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership interest by parent subsequent to business acquisition | 51.24% |  |  |  |  |  |
PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage of subsidiary | 48.76% |  |  |  |  |  |
PT-FI | Scenario, forecast |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage of subsidiary |  |  |  |  |  | 48.76% | 81.00%
PT-FI | PT-FI |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage of subsidiary |  | 48.76% |  |  | 48.76% |  |
PT-FI | PT Indonesia Papua Metal dan Mineral |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Ownership percentage | 9.36% |  |  |  |  |  |
Indemnification Agreement [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Accounts payable and accrued liabilities |  | $ 42 |  |  | $ 42 |  |

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