Debt and Equity Transactions (Unaudited)	3 Months Ended
Mar. 31, 2015
Debt and Equity Transactions [Abstract]
Debt and Equity Transactions	DEBT AND EQUITY TRANSACTIONS At March 31, 2015, FCX had $20.3 billion in debt, which included additions for unamortized fair value adjustments of $233 million (primarily from the oil and gas acquisitions in 2013), and net of reductions attributable to unamortized net discounts of $21 million and unamortized debt issuance costs of $122 million. Refer to Note 11 for discussion of a change in the presentation of debt issuance costs. In February 2015, FCX's revolving credit facility and $4.0 billion unsecured bank term loan (Term Loan) were modified to amend the maximum total leverage ratio. In addition, the Term Loan amortization schedule was extended such that, as amended, the Term Loan’s scheduled payments total $205 million in 2016, $272 million in 2017, $1.0 billion in 2018, $313 million in 2019 and $1.3 billion in 2020, compared with the previous amortization schedule of $650 million in 2016, $200 million in 2017 and $2.2 billion in 2018. At March 31, 2015, $985 million was outstanding and $42 million of letters of credit were issued under FCX's revolving credit facility, resulting in availability of approximately $3.0 billion, of which $1.5 billion could be used for additional letters of credit. 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. During first-quarter 2015, Cerro Verde borrowed an additional $422 million under its credit facility. At March 31, 2015, the outstanding principal amount was $847 million and no letters of credit were issued under Cerro Verde’s credit facility. Consolidated interest expense (excluding capitalized interest) totaled $210 million in first-quarter 2015 and $224 million in first-quarter 2014. Capitalized interest added to property, plant, equipment and mining development costs, net, totaled $45 million in first-quarter 2015 and $40 million in first-quarter 2014. Capitalized interest added to oil and gas properties not subject to amortization totaled $19 million in first-quarter 2015 and $23 million in first-quarter 2014. On March 24, 2015, FCX's Board of Directors (the Board) declared a quarterly dividend of $0.05 per share, which was paid on May 1, 2015, to common shareholders of record at the close of business on April 15, 2015. This quarterly dividend was reduced from the previous quarterly rate of $0.3125 per share in response to the impact of lower commodity prices.

DEBT AND EQUITY TRANSACTIONS

At March 31, 2015, FCX had $20.3 billion in debt, which included additions for unamortized fair value adjustments of $233 million (primarily from the oil and gas acquisitions in 2013), and net of reductions attributable to unamortized net discounts of $21 million and unamortized debt issuance costs of $122 million. Refer to Note 11 for discussion of a change in the presentation of debt issuance costs.

In February 2015, FCX's revolving credit facility and $4.0 billion unsecured bank term loan (Term Loan) were modified to amend the maximum total leverage ratio. In addition, the Term Loan amortization schedule was extended such that, as amended, the Term Loan’s scheduled payments total $205 million in 2016, $272 million in 2017, $1.0 billion in 2018, $313 million in 2019 and $1.3 billion in 2020, compared with the previous amortization schedule of $650 million in 2016, $200 million in 2017 and $2.2 billion in 2018.

At March 31, 2015, $985 million was outstanding and $42 million of letters of credit were issued under FCX's revolving credit facility, resulting in availability of approximately $3.0 billion, of which $1.5 billion could be used for additional letters of credit.

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. During first-quarter 2015, Cerro Verde borrowed an additional $422 million under its credit facility. At March 31, 2015, the outstanding principal amount was $847 million and no letters of credit were issued under Cerro Verde’s credit facility.

Consolidated interest expense (excluding capitalized interest) totaled $210 million in first-quarter 2015 and $224 million in first-quarter 2014. Capitalized interest added to property, plant, equipment and mining development costs, net, totaled $45 million in first-quarter 2015 and $40 million in first-quarter 2014. Capitalized interest added to oil and gas properties not subject to amortization totaled $19 million in first-quarter 2015 and $23 million in first-quarter 2014.

On March 24, 2015, FCX's Board of Directors (the Board) declared a quarterly dividend of $0.05 per share, which was paid on May 1, 2015, to common shareholders of record at the close of business on April 15, 2015. This quarterly dividend was reduced from the previous quarterly rate of $0.3125 per share in response to the impact of lower commodity prices.