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Financial Instruments (Unaudited) (Tables) | 9 Months Ended
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Sep. 30, 2015
Financial Instruments [Abstract] |
Unrealized gains (losses) for derivative financial instruments that are designated and qualify as fair value hedge transactions and for the related hedged item | A summary of gains (losses) recognized in revenues for derivative financial instruments related to commodity contracts that are designated and qualify as fair value hedge transactions, along with the unrealized gains (losses) on the related hedged item follows (in millions):
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Copper futures and swap contracts: |  |  |  |  |  |  |
Unrealized gains (losses): |  |  |  |  |  |  |
Derivative financial instruments | $ | (2 | ) |  | $ | (10 | ) |  | $ | — |  |  | $ | (10 | )
Hedged item – firm sales commitments | 2 |  |  | 10 |  |  | — |  |  | 10 |
Realized (losses) gains: |  |  |  |  |  |  |
Matured derivative financial instruments | (12 | ) |  | 1 |  |  | (23 | ) |  | (3 | )
Schedule of Derivative Instruments | At September 30, 2015, the outstanding 2015 crude oil option contracts, which settle monthly and cover approximately 7.7 million barrels over the remainder of 2015, follow:
|  |  |  | Daily Volumes (thousand barrels) |  | Average Strike Price (per barrel)a |  | Weighted-Average Deferred Premium (per barrel) |  |
2015 Period |  | Instrument Type |  |  | Floor |  | Floor Limit |  |  | Index
October - December |  | Put options b |  | 84 |  |  | $ | 90 |  |  | $ | 70 |  |  | $ | 6.89 |  |  | Brent
a. | The average strike prices do not reflect any premiums to purchase the put options.
b. | If the index price is less than the per barrel floor, FCX receives the difference between the per barrel floor and the index price up to a maximum of $20 per barrel less the option premium. If the index price is at or above the per barrel floor, FCX pays the option premium and no cash settlement is received.
A summary of FCX’s embedded commodity derivatives at September 30, 2015, follows:
| Open Positions |  | Average Price Per Unit |  | Maturities Through
|  | Contract |  | Market |
Embedded derivatives in provisional sales contracts: |  |  |  |  |  |  |
Copper (millions of pounds) | 536 |  |  | $ | 2.45 |  |  | $ | 2.34 |  |  | March 2016
Gold (thousands of ounces) | 149 |  |  | 1,125 |  |  | 1,118 |  |  | December 2015
Embedded derivatives in provisional purchase contracts: |  |  |  |  |  |  |
Copper (millions of pounds) | 87 |  |  | 2.45 |  |  | 2.35 |  |  | January 2016
Realized and unrealized gains (losses) for derivative financial instruments that do not qualify as hedge transactions | A summary of the realized and unrealized (losses) gains recognized in (loss) income before income taxes and equity in affiliated companies’ net earnings for commodity contracts that do not qualify as hedge transactions, including embedded derivatives, follows (in millions):
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Embedded derivatives in provisional copper and gold |  |  |  |  |  |  |
sales contracts a | $ | (170 | ) |  | $ | (99 | ) |  | $ | (320 | ) |  | $ | (184 | )
Crude oil options a | 29 |  |  | 57 |  |  | 87 |  |  | (47 | )
Natural gas swaps a | — |  |  | 7 |  |  | — |  |  | (9 | )
Copper forward contracts b | (8 | ) |  | (4 | ) |  | (15 | ) |  | 1 |
a. | Amounts recorded in revenues.
b. | Amounts recorded in cost of sales as production and delivery costs.
Fair Values of Unsettled Derivative Financial Instruments | A summary of these unsettled commodity contracts that are offset in the balance sheet follows (in millions):
|  | Assets |  | Liabilities
|  | September 30, 2015 |  | December 31, 2014 |  | September 30, 2015 |  | December 31, 2014
Gross amounts recognized: |  |  |  |  |  |  |  |
Commodity contracts: |  |  |  |  |  |  |  |
Embedded derivatives in provisional |  |  |  |  |  |  |  |
sales/purchase contracts |  | $ | 17 |  |  | $ | 15 |  |  | $ | 69 |  |  | $ | 93 |
Crude oil derivatives |  | 101 |  |  | 316 |  |  | — |  |  | — |
Copper derivatives |  | 1 |  |  | — |  |  | 8 |  |  | 7 |
|  | 119 |  |  | 331 |  |  | 77 |  |  | 100 |
Less gross amounts of offset: |  |  |  |  |  |  |  |
Commodity contracts: |  |  |  |  |  |  |  |
Embedded derivatives in provisional |  |  |  |  |  |  |  |
sales/purchase contracts |  | 2 |  |  | 1 |  |  | 2 |  |  | 1 |
Crude oil derivatives |  | — |  |  | — |  |  | — |  |  | — |
Copper derivatives |  | 1 |  |  | — |  |  | 1 |  |  | — |
|  | 3 |  |  | 1 |  |  | 3 |  |  | 1 |
Net amounts presented in balance sheet: |  |  |  |  |  |  |  |
Commodity contracts: |  |  |  |  |  |  |  |
Embedded derivatives in provisional |  |  |  |  |  |  |  |
sales/purchase contracts |  | 15 |  |  | 14 |  |  | 67 |  |  | 92 |
Crude oil derivatives |  | 101 |  |  | 316 |  |  | — |  |  | — |
Copper derivatives |  | — |  |  | — |  |  | 7 |  |  | 7 |
|  | $ | 116 |  |  | $ | 330 |  |  | $ | 74 |  |  | $ | 99 |
Balance sheet classification: |  |  |  |  |  |  |  |
Trade accounts receivable |  | $ | 6 |  |  | $ | 5 |  |  | $ | 50 |  |  | $ | 56 |
Other current assets |  | 101 |  |  | 316 |  |  | — |  |  | — |
Accounts payable and accrued liabilities |  | 9 |  |  | 9 |  |  | 24 |  |  | 43 |
|  | $ | 116 |  |  | $ | 330 |  |  | $ | 74 |  |  | $ | 99 |
A summary of the fair values of unsettled commodity derivative financial instruments follows (in millions):
|  | September 30, 2015 |  | December 31, 2014
Commodity Derivative Assets: |  |  |  |
Derivatives designated as hedging instruments: |  |  |  |
Copper futures and swap contracts a |  | $ | 1 |  |  | $ | — |
Derivatives not designated as hedging instruments: |  |  |  |
Embedded derivatives in provisional copper and gold |  |  |  |
sales/purchase contracts |  | 17 |  |  | 15 |
Crude oil options b |  | 101 |  |  | 316 |
Total derivative assets |  | $ | 119 |  |  | $ | 331 |
Commodity Derivative Liabilities: |  |  |  |
Derivatives designated as hedging instruments: |  |  |  |
Copper futures and swap contracts a |  | $ | 8 |  |  | $ | 7 |
Derivatives not designated as hedging instruments: |  |  |  |
Embedded derivatives in provisional copper and gold |  |  |  |
sales/purchase contracts |  | 69 |  |  | 93 |
Total derivative liabilities |  | $ | 77 |  |  | $ | 100 |
a. | FCX paid $16 million to brokers at September 30, 2015, and $10 million at December 31, 2014, for margin requirements (recorded in other current assets).
b. | Amounts are net of $53 million at September 30, 2015, and $210 million at December 31, 2014, for deferred premiums and accrued interest.

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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41641-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41638-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579240-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41620-113959 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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