Debt and Equity Transactions (Unaudited)	6 Months Ended
Jun. 30, 2014
Debt and Equity Transactions [Abstract]
Debt and Equity Transactions	DEBT AND EQUITY TRANSACTIONS In June 2014, FCX announced the redemption of $1.7 billion of the aggregate principal amount of outstanding senior notes on July 23, 2014. The redemptions included $263 million for the 6.125% Senior Notes due 2019, $525 million for the 6½% Senior Notes due 2020, $350 million for the 6.75% Senior Notes due 2022 and $525 million for the 6.875% Senior Notes due 2023. At the redemption date, these senior notes had a book value of $1.8 billion, which included fair value adjustments of $167 million. In accordance with the terms of these senior notes, the redemptions were funded with cash contributions to FM O&G by FCX in exchange for additional equity, which is eliminated in the consolidated financial statements. FCX used available cash and borrowed approximately $950 million under its revolving credit facility and uncommitted lines of credit to fund the contributions to FM O&G. Holders of these senior notes received the principal amount together with the redemption premium and accrued and unpaid interest to the redemption date. As a result of these redemptions, FCX will report a gain on early extinguishment of debt of $58 million in third-quarter 2014. In May 2014, FCX, PT Freeport Indonesia (PT-FI) and Freeport-McMoRan Oil & Gas LLC (FM O&G LLC, a wholly owned subsidiary of FM O&G and the successor entity of PXP) amended the senior unsecured $3.0 billion revolving credit facility to extend the maturity date one year to May 31, 2019, and increase the aggregate principal amount from $3.0 billion to $4.0 billion, with $500 million available to PT-FI. FCX, PT-FI and FM O&G LLC had entered into the $3.0 billion revolving credit facility on May 31, 2013 (upon completion of the acquisition of PXP). At June 30, 2014, there were no borrowings and $46 million of letters of credit issued under the revolving credit facility, resulting in availability of approximately $4.0 billion, of which $1.5 billion could be used for additional letters of credit. In April 2014, FCX redeemed $210 million of the aggregate principal amount of the outstanding 6.625% Senior Notes due 2021. In accordance with the terms of the senior notes, the redemption was funded with cash contributions to FM O&G by FCX in exchange for additional equity, which is eliminated in the consolidated financial statements. Holders of these senior notes received the principal amount together with the redemption premium and accrued and unpaid interest to the redemption date. As a result of the redemption, FCX recorded a gain on early extinguishment of debt of $6 million in second-quarter 2014. In March 2014, Sociedad Minera Cerro Verde S.A.A. (Cerro Verde, FCX's mining subsidiary in Peru) entered into a five-year, $1.8 billion senior unsecured credit facility that is nonrecourse to FCX and the other shareholders of Cerro Verde. The credit facility allows for term loan borrowings up to the full amount of the facility, less any amounts issued and outstanding under a $500 million letter of credit sublimit. Interest on amounts drawn under the term loan is based on London Interbank Offered Rate (LIBOR) plus a spread (currently 1.90 percent) based on Cerro Verde’s total net debt to earnings before interest, taxes, depreciation and amortization (EBITDA) ratio as defined in the agreement. Amounts may be drawn or letters of credit may be issued over a two-year period to fund a portion of Cerro Verde’s expansion project and for Cerro Verde's general corporate purposes. The credit facility amortizes in three installments in amounts necessary for the aggregate borrowings and outstanding letters of credit not to exceed 85 percent of the $1.8 billion commitment on September 30, 2017, 70 percent on March 31, 2018, and 35 percent on September 30, 2018, with the remaining balance due on the maturity date of March 10, 2019. At June 30, 2014, there were no borrowings and no letters of credit issued under Cerro Verde’s credit facility. FCX recorded a loss on early extinguishment of debt of $45 million ($39 million to net income attributable to FCX common stockholders) in first-quarter 2013 for financing costs incurred for the terminated $9.5 billion acquisition bridge loan facility, which was entered into in December 2012 to provide interim financing for FCX's second-quarter 2013 acquisitions of PXP and MMR. Consolidated interest expense (excluding capitalized interest) totaled $225 million in second-quarter 2014, $167 million in second-quarter 2013, $449 million for the first six months of 2014 and $242 million for the first six months of 2013. Capitalized interest included in property, plant, equipment and mining development costs, net, totaled $39 million in second-quarter 2014, $27 million in second-quarter 2013, $79 million for the first six months of 2014 and $45 million for the six months of 2013. Capitalized interest included in oil and gas properties not subject to amortization totaled $22 million in second-quarter 2014, $8 million in second-quarter 2013, $45 million for the first six months of 2014 and $8 million for the first six months of 2013. On June 25, 2014, FCX's Board of Directors declared a quarterly dividend of $0.3125 per share, which was paid on August 1, 2014, to common shareholders of record at the close of business on July 15, 2014. In connection with the second-quarter 2013 acquisition of PXP, FCX issued 91 million shares of its common stock.

DEBT AND EQUITY TRANSACTIONS

In June 2014, FCX announced the redemption of $1.7 billion of the aggregate principal amount of outstanding senior notes on July 23, 2014. The redemptions included $263 million for the 6.125% Senior Notes due 2019, $525 million for the 6½% Senior Notes due 2020, $350 million for the 6.75% Senior Notes due 2022 and $525 million for the 6.875% Senior Notes due 2023. At the redemption date, these senior notes had a book value of $1.8 billion, which included fair value adjustments of $167 million. In accordance with the terms of these senior notes, the redemptions were funded with cash contributions to FM O&G by FCX in exchange for additional equity, which is eliminated in the consolidated financial statements. FCX used available cash and borrowed approximately $950 million under its revolving credit facility and uncommitted lines of credit to fund the contributions to FM O&G. Holders of these senior notes received the principal amount together with the redemption premium and accrued and unpaid interest to the redemption date. As a result of these redemptions, FCX will report a gain on early extinguishment of debt of $58 million in third-quarter 2014.

In May 2014, FCX, PT Freeport Indonesia (PT-FI) and Freeport-McMoRan Oil & Gas LLC (FM O&G LLC, a wholly owned subsidiary of FM O&G and the successor entity of PXP) amended the senior unsecured $3.0 billion revolving credit facility to extend the maturity date one year to May 31, 2019, and increase the aggregate principal amount from $3.0 billion to $4.0 billion, with $500 million available to PT-FI. FCX, PT-FI and FM O&G LLC had entered into the $3.0 billion revolving credit facility on May 31, 2013 (upon completion of the acquisition of PXP). At June 30, 2014, there were no borrowings and $46 million of letters of credit issued under the revolving credit facility, resulting in availability of approximately $4.0 billion, of which $1.5 billion could be used for additional letters of credit.

In April 2014, FCX redeemed $210 million of the aggregate principal amount of the outstanding 6.625% Senior Notes due 2021. In accordance with the terms of the senior notes, the redemption was funded with cash contributions to FM O&G by FCX in exchange for additional equity, which is eliminated in the consolidated financial statements. Holders of these senior notes received the principal amount together with the redemption premium and accrued and unpaid interest to the redemption date. As a result of the redemption, FCX recorded a gain on early extinguishment of debt of $6 million in second-quarter 2014.

In March 2014, Sociedad Minera Cerro Verde S.A.A. (Cerro Verde, FCX's mining subsidiary in Peru) entered into a five-year, $1.8 billion senior unsecured credit facility that is nonrecourse to FCX and the other shareholders of Cerro Verde. The credit facility allows for term loan borrowings up to the full amount of the facility, less any amounts issued and outstanding under a $500 million letter of credit sublimit. Interest on amounts drawn under the term loan is based on London Interbank Offered Rate (LIBOR) plus a spread (currently 1.90 percent) based on Cerro Verde’s total net debt to earnings before interest, taxes, depreciation and amortization (EBITDA) ratio as defined in the agreement. Amounts may be drawn or letters of credit may be issued over a two-year period to fund a portion of Cerro Verde’s expansion project and for Cerro Verde's general corporate purposes. The credit facility amortizes in three installments in amounts necessary for the aggregate borrowings and outstanding letters of credit not to exceed 85 percent of the $1.8 billion commitment on September 30, 2017, 70 percent on March 31, 2018, and 35 percent on September 30, 2018, with the remaining balance due on the maturity date of March 10, 2019. At June 30, 2014, there were no borrowings and no letters of credit issued under Cerro Verde’s credit facility.

FCX recorded a loss on early extinguishment of debt of $45 million ($39 million to net income attributable to FCX common stockholders) in first-quarter 2013 for financing costs incurred for the terminated $9.5 billion acquisition bridge loan facility, which was entered into in December 2012 to provide interim financing for FCX's second-quarter 2013 acquisitions of PXP and MMR.

Consolidated interest expense (excluding capitalized interest) totaled $225 million in second-quarter 2014, $167 million in second-quarter 2013, $449 million for the first six months of 2014 and $242 million for the first six months of 2013. Capitalized interest included in property, plant, equipment and mining development costs, net, totaled $39 million in second-quarter 2014, $27 million in second-quarter 2013, $79 million for the first six months of 2014 and $45 million for the six months of 2013. Capitalized interest included in oil and gas properties not subject to amortization totaled $22 million in second-quarter 2014, $8 million in second-quarter 2013, $45 million for the first six months of 2014 and $8 million for the first six months of 2013.

On June 25, 2014, FCX's Board of Directors declared a quarterly dividend of $0.3125 per share, which was paid on August 1, 2014, to common shareholders of record at the close of business on July 15, 2014.

In connection with the second-quarter 2013 acquisition of PXP, FCX issued 91 million shares of its common stock.