OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES	12 Months Ended
Dec. 31, 2013
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]
Ownership In Subsidiaries And Joint Ventures	OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES Ownership in Subsidiaries. FMC is a fully integrated producer of copper and molybdenum, with mines in North America, South America and the Tenke minerals district in the DRC. At December 31, 2013, FMC’s operating mines in North America were Morenci, Bagdad, Safford, Sierrita and Miami located in Arizona; Tyrone and Chino located in New Mexico; and Henderson and Climax located in Colorado. FCX has an 85 percent interest in Morenci (refer to “Joint Ventures – Sumitomo”) and owns 100 percent of the other North America mines. At December 31, 2013, operating mines in South America were Cerro Verde (53.56 percent owned) located in Peru, and El Abra (51 percent owned), Candelaria (80 percent owned) and Ojos del Salado (80 percent owned) located in Chile. At December 31, 2013, FMC owned an effective 56 percent interest in the Tenke minerals district in the DRC (refer to Note 13 for discussion of the change in ownership interest in 2012). At December 31, 2013, FMC’s net assets totaled $20.3 billion and its accumulated deficit totaled $9.0 billion. FCX had no loans outstanding to FMC at December 31, 2013. FCX’s direct ownership in PT-FI totals 81.28 percent. PT Indocopper Investama, an Indonesian company, owns 9.36 percent of PT-FI, and FCX owns 100 percent of PT Indocopper Investama. Refer to "Joint Ventures - Rio Tinto" for discussion of the unincorporated joint ventures. At December 31, 2013, PT-FI's net assets totaled $4.9 billion and its retained earnings totaled $4.7 billion. As of December 31, 2013, FCX had no loans outstanding to PT-FI. FCX owns 100 percent of the outstanding Atlantic Copper common stock. At December 31, 2013, Atlantic Copper’s net liabilities totaled $148 million and its accumulated deficit totaled $543 million. FCX had $642 million in intercompany loans outstanding to Atlantic Copper at December 31, 2013. FCX owns 100 percent of FM O&G, which has a portfolio of oil and gas assets. At December 31, 2013, FM O&G’s net assets totaled $9.8 billion and its retained earnings totaled $265 million. FCX had $3.4 billion in intercompany loans to FM O&G at December 31, 2013. Joint Ventures. FCX has the following unincorporated joint ventures with third parties. Rio Tinto. FCX and Rio Tinto have established certain unincorporated joint ventures. Under the joint venture arrangements, Rio Tinto has a 40 percent interest in PT-FI’s Contract of Work and the option to participate in 40 percent of any other future exploration projects in Papua, Indonesia. Pursuant to the joint venture agreement, Rio Tinto has a 40 percent interest in certain assets and future production exceeding specified annual amounts of copper, gold and silver through 2021 in Block A of PT-FI’s Contract of Work, and, after 2021, a 40 percent interest in all production from Block A. All of PT-FI’s proven and probable reserves and its mining operations are located in the Block A area. Operating, nonexpansion capital and administrative costs are shared proportionately between PT-FI and Rio Tinto based on the ratio of (i) the incremental revenues from production from PT-FI’s expansion completed in 1998 to (ii) total revenues from production from Block A, including production from PT-FI’s previously existing reserves. PT-FI will continue to receive 100 percent of the cash flow from specified annual amounts of copper, gold and silver through 2021 calculated by reference to its proven and probable reserves as of December 31, 1994, and 60 percent of all remaining cash flow. The agreement provides for adjustments to the specified annual amounts of copper, gold and silver attributable 100 percent to PT-FI upon the occurrence of certain events that cause an interruption in production to occur, including events such as the business interruption and property damage relating to the 2011 incidents affecting PT-FI's concentrate pipelines. As a result of these incidents, the 2011 specified amounts, before smelter recoveries, attributable 100 percent to PT-FI were reduced by 228 million pounds for copper and 224 thousand ounces for gold, which will be offset by identical increases in future periods. The payable to Rio Tinto for its share of joint venture cash flows was $33 million at December 31, 2013, and $4 million at December 31, 2012. Sumitomo. FCX owns an 85 percent undivided interest in Morenci via an unincorporated joint venture. The remaining 15 percent is owned by Sumitomo, a jointly owned subsidiary of Sumitomo Metal Mining Co., Ltd. and Sumitomo Corporation. Each partner takes in kind its share of Morenci’s production. FMC purchased 76 million pounds of Morenci’s copper cathode from Sumitomo for $253 million during 2013. FCX had a receivable from Sumitomo of $12 million at December 31, 2013, and $49 million at December 31, 2012.

OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES

Ownership in Subsidiaries. FMC is a fully integrated producer of copper and molybdenum, with mines in North America, South America and the Tenke minerals district in the DRC. At December 31, 2013, FMC’s operating mines in North America were Morenci, Bagdad, Safford, Sierrita and Miami located in Arizona; Tyrone and Chino located in New Mexico; and Henderson and Climax located in Colorado. FCX has an 85 percent interest in Morenci (refer to “Joint Ventures – Sumitomo”) and owns 100 percent of the other North America mines. At December 31, 2013, operating mines in South America were Cerro Verde (53.56 percent owned) located in Peru, and El Abra (51 percent owned), Candelaria (80 percent owned) and Ojos del Salado (80 percent owned) located in Chile. At December 31, 2013, FMC owned an effective 56 percent interest in the Tenke minerals district in the DRC (refer to Note 13 for discussion of the change in ownership interest in 2012). At December 31, 2013, FMC’s net assets totaled $20.3 billion and its accumulated deficit totaled $9.0 billion. FCX had no loans outstanding to FMC at December 31, 2013.

FCX’s direct ownership in PT-FI totals 81.28 percent. PT Indocopper Investama, an Indonesian company, owns 9.36 percent of PT-FI, and FCX owns 100 percent of PT Indocopper Investama. Refer to "Joint Ventures - Rio Tinto" for discussion of the unincorporated joint ventures. At December 31, 2013, PT-FI's net assets totaled $4.9 billion and its retained earnings totaled $4.7 billion. As of December 31, 2013, FCX had no loans outstanding to PT-FI.

FCX owns 100 percent of the outstanding Atlantic Copper common stock. At December 31, 2013, Atlantic Copper’s net liabilities totaled $148 million and its accumulated deficit totaled $543 million. FCX had $642 million in intercompany loans outstanding to Atlantic Copper at December 31, 2013.

FCX owns 100 percent of FM O&G, which has a portfolio of oil and gas assets. At December 31, 2013, FM O&G’s net assets totaled $9.8 billion and its retained earnings totaled $265 million. FCX had $3.4 billion in intercompany loans to FM O&G at December 31, 2013.

Joint Ventures. FCX has the following unincorporated joint ventures with third parties.

Rio Tinto. FCX and Rio Tinto have established certain unincorporated joint ventures. Under the joint venture arrangements, Rio Tinto has a 40 percent interest in PT-FI’s Contract of Work and the option to participate in 40 percent of any other future exploration projects in Papua, Indonesia.

Pursuant to the joint venture agreement, Rio Tinto has a 40 percent interest in certain assets and future production exceeding specified annual amounts of copper, gold and silver through 2021 in Block A of PT-FI’s Contract of Work, and, after 2021, a 40 percent interest in all production from Block A. All of PT-FI’s proven and probable reserves and its mining operations are located in the Block A area. Operating, nonexpansion capital and administrative costs are shared proportionately between PT-FI and Rio Tinto based on the ratio of (i) the incremental revenues from production from PT-FI’s expansion completed in 1998 to (ii) total revenues from production from Block A, including production from PT-FI’s previously existing reserves. PT-FI will continue to receive 100 percent of the cash flow from specified annual amounts of copper, gold and silver through 2021 calculated by reference to its proven and probable reserves as of December 31, 1994, and 60 percent of all remaining cash flow. The agreement provides for adjustments to the specified annual amounts of copper, gold and silver attributable 100 percent to PT-FI upon the occurrence of certain events that cause an interruption in production to occur, including events such as the business interruption and property damage relating to the 2011 incidents affecting PT-FI's concentrate pipelines. As a result of these incidents, the 2011 specified amounts, before smelter recoveries, attributable 100 percent to PT-FI were reduced by 228 million pounds for copper and 224 thousand ounces for gold, which will be offset by identical increases in future periods. The payable to Rio Tinto for its share of joint venture cash flows was $33 million at December 31, 2013, and $4 million at December 31, 2012.

Sumitomo. FCX owns an 85 percent undivided interest in Morenci via an unincorporated joint venture. The remaining 15 percent is owned by Sumitomo, a jointly owned subsidiary of Sumitomo Metal Mining Co., Ltd. and Sumitomo Corporation. Each partner takes in kind its share of Morenci’s production. FMC purchased 76 million pounds of Morenci’s copper cathode from Sumitomo for $253 million during 2013. FCX had a receivable from Sumitomo of $12 million at December 31, 2013, and $49 million at December 31, 2012.