General Information (Unaudited)	9 Months Ended
General Information (Unaudited)	Sep. 30, 2021
General Information [Abstract]
General Information	GENERAL INFORMATION The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and do not include all information and disclosures required by generally accepted accounting principles in the United States (U.S.). Therefore, this information should be read in conjunction with Freeport-McMoRan Inc.’s (FCX) consolidated financial statements and notes contained in its annual report on Form 10-K for the year ended December 31, 2020 (2020 Form 10-K). The information furnished herein reflects all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the interim periods reported. All such adjustments are, in the opinion of management, of a normal recurring nature. Operating results for the nine-month period ended September 30, 2021, are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. Trade Accounts Receivable Agreements. In first-quarter 2021, PT Freeport Indonesia (PT-FI) entered into agreements to sell certain trade accounts receivables to unrelated third-party financial institutions. The agreements were entered into in the normal course of business to fund the working capital for the additional quantity of copper to be supplied by PT-FI to PT Smelting (PT-FI’s 39.5 percent owned copper smelter and refinery in Gresik, Indonesia - see “Acquisition of Minority Interest in PT Smelting” below for further discussion). The balances sold under the agreements were excluded from trade accounts receivable on the consolidated balance sheet at September 30, 2021. Receivables are considered sold when (i) they are transferred beyond the reach of PT-FI and its creditors, (ii) the purchaser has the right to pledge or exchange the receivables, and (iii) PT-FI has no continuing involvement in the transferred receivables. In addition, PT-FI provides no other forms of continued financial support to the purchaser of the receivables once the receivables are sold. Gross amounts sold under these arrangements totaled $131 million in third-quarter 2021 and $319 million for the nine-month period ended September 30, 2021. Discounts on the sold receivables totaled less than $1 million in third-quarter 2021 and $1 million for the nine-month period ended September 30, 2021. Acquisition of Minority Interest in PT Smelting. On April 30, 2021, PT-FI acquired 14.5 percent of the outstanding common stock of PT Smelting for $33 million, increasing its ownership interest from 25 percent to 39.5 percent. The remaining shares of PT Smelting continue to be owned by Mitsubishi Materials Corporation. PT-FI has continued to account for its investment in PT Smelting using the equity method since it does not have control over PT Smelting. Sale of Freeport Cobalt. On September 1, 2021, FCX’s 56-percent-owned subsidiary, Koboltti Chemicals Holdings Limited (KCHL), completed the sale of its remaining cobalt business based in Kokkola, Finland (Freeport Cobalt) to Jervois Global Limited (Jervois) for $208 million (subject to post-closing adjustments), consisting of cash consideration of $173 million and 7 percent of Jervois shares (valued at $35 million). At closing, Freeport Cobalt’s assets included cash of approximately $20 million and other net assets of $125 million. FCX recorded a gain of $60 million ($34 million to net income attributable to common stock) in third-quarter 2021. In addition, KCHL will have the right to receive contingent consideration of up to $40 million based on the future performance of Freeport Cobalt. Any gain related to the contingent consideration will be recognized when received. The operating results of Freeport Cobalt are not significant to FCX’s financial statements for the year ended December 31, 2020, or the three- and nine-month periods ended September 30, 2021. Subsequent Events. FCX evaluated events after September 30, 2021, and through the date the consolidated financial statements were issued, and took into account events and transactions occurring during this period requiring recognition or disclosure in these consolidated financial statements.