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Debt and Equity Transactions (Unaudited) Debt (Tables) | 3 Months Ended
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Mar. 31, 2016
Debt Instrument [Line Items] |
Schedule of Debt [Table Text Block] | The components of debt follow:
| March 31, 2016 |  | December 31, 2015
Term Loan | $ | 3,011 |  |  | $ | 3,032 |
Revolving credit facility | 480 |  |  | — |
Lines of credit | 332 |  |  | 442 |
Cerro Verde credit facility | 1,783 |  |  | 1,781 |
Cerro Verde shareholder loans | 261 |  |  | 259 |
Senior notes and debentures: |  |  |
Issued by FCX | 11,911 |  |  | 11,908 |
Issued by Freeport-McMoRan Oil & Gas LLC (FM O&G LLC) | 2,532 |  |  | 2,539 |
Issued by FMC | 359 |  |  | 359 |
Other (including equipment capital leases and other short-term borrowings) | 108 |  |  | 108 |
Total debt a | 20,777 |  |  | 20,428 |
Less current portion of debt | (1,139 | ) |  | (649 | )
Long-term debt | $ | 19,638 |  |  | $ | 19,779 |
a. | Includes additions for unamortized fair value adjustments totaling $203 million at March 31, 2016, and $210 million at December 31, 2015, and net reductions for unamortized debt issuance costs and unamortized discounts of $130 million at March 31, 2016, and $129 million at December 31, 2015.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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