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Debt (Tables) | 9 Months Ended
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Sep. 30, 2017
Debt Instrument, Redemption [Line Items] |
Schedule of Debt [Table Text Block] | DEBT The components of debt follow (in millions):
|  | September 30, 2017 |  | December 31, 2016
Senior notes and debentures: |  |  |  |
Issued by FCX |  | $ | 12,811 |  |  | $ | 13,745 |
Issued by FMC |  | 358 |  |  | 359 |
Issued by Freeport-McMoRan Oil & Gas LLC (FM O&G LLC) |  | 122 |  |  | 267 |
Cerro Verde credit facility |  | 1,486 |  |  | 1,390 |
Cerro Verde shareholder loans |  | — |  |  | 261 |
Other |  | 5 |  |  | 5 |
Total debt a |  | 14,782 |  |  | 16,027 |
Less current portion of debt |  | (2,215 | ) |  | (1,232 | )
Long-term debt |  | $ | 12,567 |  |  | $ | 14,795 |
a. | Includes additions for unamortized fair value adjustments totaling $131 million at September 30, 2017 ($179 million at December 31, 2016), and is net of reductions for unamortized net discounts and unamortized debt issuance costs totaling $92 million at September 30, 2017 ($100 million at December 31, 2016).
Schedule of Extinguishment of Debt [Table Text Block] | During third-quarter 2017, FCX redeemed in full certain senior notes. A summary of these early debt extinguishments follows (in millions):
| Principal Amount |  | Net Adjustments |  | Book Value |  | Redemption Value |  | Gain
FCX 6.125% Senior Notes due 2019 | $ | 179 |  |  | $ | 5 |  |  | $ | 184 |  |  | $ | 182 |  |  | $ | 2 |
FM O&G 6.125% Senior Notes due 2019 | 58 |  |  | 2 |  |  | 60 |  |  | 59 |  |  | 1 |
FCX 6.625% Senior Notes due 2021 | 228 |  |  | 12 |  |  | 240 |  |  | 234 |  |  | 6 |
FM O&G 6.625% Senior Notes due 2021 | 33 |  |  | 2 |  |  | 35 |  |  | 34 |  |  | 1 |
FM O&G 6.75% Senior Notes due 2022 | 45 |  |  | 2 |  |  | 47 |  |  | 46 |  |  | 1 |
| $ | 543 |  |  | $ | 23 |  |  | $ | 566 |  |  | $ | 555 |  |  | $ | 11 |

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- Definition Tabular disclosure of debt extinguished which may include, amount of gain (loss), the income tax effect and the per share amount of the aggregate gain (loss), net of the related income tax. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7516071&loc=d3e13374-112631 + Details
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