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DISPOSITIONS AND ACQUISITIONS (FCX Consolidated Balance Sheet) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 21, 2018
--- | --- | --- | ---
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Other current assets | $ 655 | $ 422 |
Property, plant, equipment and mine development costs, net | 29,584 | 28,010 |
Noncontrolling interests | (8,150) | (8,094) |
Capital in excess of par value | $ 25,830 | $ 26,013 |
PT-FI | Rio Tinto Share In Joint Venture |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Cash |  |  | $ 458
Other current assets |  |  | 23
Liabilities other than taxes |  |  | (77)
Deferred income taxes, net |  |  | (788)
Noncontrolling interests |  |  | (4,762)
Capital in excess of par value |  |  | 531
PT-FI | Rio Tinto Share In Joint Venture | Mineral reserves |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Property, plant, equipment and mine development costs, net |  |  | 3,056
PT-FI | Rio Tinto Share In Joint Venture | Mine development, infrastructure and other |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Property, plant, equipment and mine development costs, net |  |  | $ 1,559

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