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SUPPLEMENTARY OIL AND GAS INFORMATION (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2013
Supplementary Oil and Gas Information [Abstract] |
Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block] | FCX's oil and gas acquisition, exploration and development activities since the acquisitions of PXP and MMR follow:
Property acquisition costs: |
Proved properties a | $ | 12,205 |
Unproved properties b | 11,259 |
Exploration costs | 502 |
Development costs | 854 |
| $ | 24,820 |
a. | Included $12.2 billion from the acquisitions of PXP and MMR.
b. | Included $11.1 billion from the acquisitions of PXP and MMR.
Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block] | The following table presents the aggregate capitalized costs subject to amortization for oil and gas properties and the aggregate related accumulated amortization as of December 31, 2013:
Properties subject to amortization |  | $ | 13,829 |
Accumulated amortization |  | (1,357 | )
|  | $ | 12,472 |
Schedule of Capitalized Costs of Unproved Properties Excluded from Amortization [Table Text Block] | The following table summarizes the categories of costs comprising the amount of unproved properties not subject to amortization as of December 31, 2013:
U.S.: |  |
Onshore |  |
Acquisition costs |  | $ | 3,109 |
Exploration costs |  | 8 |
Capitalized interest |  | 11 |
Offshore |  |
Acquisition costs |  | 7,528 |
Exploration costs |  | 163 |
Capitalized interest |  | 53 |
International: |  |
Offshore |  |
Acquisition costs |  | 15 |
Exploration costs |  | — |
Capitalized interest |  | — |
|  | $ | 10,887 |
Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block] | The results of operations from oil and gas producing activities from June 1, 2013, to December 31, 2013, presented below exclude non-oil and gas revenues, general and administrative expenses, interest expense and interest income. Income tax expense was determined by applying the statutory rates to pre-tax operating results:
Revenues from oil and gas producing activities |  | $ | 2,616 |
Production and delivery costs |  | (682 | )
Depreciation, depletion and amortization |  | (1,358 | )
Income tax expense (based on FCX's statutory tax rate) |  | (219 | )
Results of operations from oil and gas producing activities (excluding general and administrative expenses, interest expense and interest income) |  | $ | 357 |
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block] | The following table sets forth certain data pertaining to proved, proved developed and proved undeveloped reserves all of which are in the U.S. for the period June 1, 2013, to December 31, 2013.
|  | Oil |  | Gas |  | Total
|  | (MMbls)a,b |  | (Bcf)a |  | (MMBOE)a
Proved reserves: |  |  |  |  |  |
Acquisitions of PXP and MMR |  | 368 |  |  | 626 |  |  | 472 |
Extensions and discoveries |  | 20 |  |  | 20 |  |  | 24 |
Revisions of previous estimates |  | 11 |  |  | (26 | ) |  | 7 |
Sale of reserves in-place |  | — |  |  | (3 | ) |  | (1 | )
Production |  | (29 | ) |  | (55 | ) |  | (38 | )
Balance at December 31, 2013 |  | 370 |  |  | 562 |  |  | 464 |
Proved developed reserves at December 31, 2013 |  | 236 |  |  | 423 |  |  | 307 |
Proved undeveloped reserves at December 31, 2013 |  | 134 |  |  | 139 |  |  | 157 |
a. | MMbls = million barrels; Bcf = billion cubic feet; MMBOE = million BOE
b. | Included 20 MMBbls of NGL proved reserves, consisting of 14 MMBbls of proved developed and 6 MMBbls of proved undeveloped at December 31, 2013.
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block] | The Standardized Measure related to proved oil and natural gas reserves as of December 31, 2013, follows:
Future cash inflows |  | $ | 38,901 |
Future production expense |  | (12,774 | )
Future development costs a |  | (6,480 | )
Future income tax expense |  | (4,935 | )
Future net cash flows |  | 14,712 |
Discounted at 10% per year |  | (5,295 | )
Standardized Measure |  | $ | 9,417 |
a. Included estimated asset retirement costs of $1.8 billion.
Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows [Table Text Block] | The following table summarizes the principal sources of changes in the Standardized Measure from June 1, 2013, to December 31, 2013:
Reserves acquired in the acquisitions of PXP and MMR |  | $ | 14,467 |
Sales, net of production expenses |  | (2,296 | )
Net changes in sales and transfer prices, net of production expenses |  | (459 | )
Extensions, discoveries and improved recoveries |  | 752 |
Changes in estimated future development costs |  | (1,190 | )
Previously estimated development costs incurred during the year |  | 578 |
Sales of reserves in-place |  | (12 | )
Other purchases of reserves in-place |  | — |
Revisions of quantity estimates |  | 102 |
Accretion of discount |  | 701 |
Net change in income taxes |  | (3,226 | )
Balance at December 31, 2013 |  | $ | 9,417 |

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- Definition Tabular disclosure of the capitalized costs of unproved properties and major development projects that are excluded from capitalized costs being amortized. This includes the total costs excluded and, at a minimum, these categories of costs: acquisition costs, exploration costs, development costs in the case of significant development projects, and capitalized interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=27015464&loc=d3e511914-122862 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 10 -Paragraph c -Subparagraph 3(ii)(A) -Article 4 + Details
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- Definition Tabular disclosure of the net quantities of an enterprise's interests in proved developed and undeveloped reserves of (a) crude oil (including condensate and natural gas liquids), (b) natural gas (including coal bed methane), (c) synthetic oil, (d) synthetic gas, and (e) other nonrenewable natural resources that are intended to be upgraded during the period as of the beginning of the period, changes in quantities during the period, and as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61858-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61797-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61869-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61872-109447 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61884-109447 + Details
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- Definition Tabular disclosure of the future net cash flows relating to proved oil and gas reserves and oil and gas subject to purchase under long-term agreements in which the enterprise participates in the operation of the properties on which the oil and gas is located or otherwise serves as the producer. This information is presented in aggregate and for each geographic area for which reserve quantities are disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 36 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62536-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62424-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62479-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62455-109447 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62500-109447 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62476-109447 + Details
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