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CONTINGENCIES (Tables) | 12 Months Ended
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Dec. 31, 2013
Contingencies [Abstract] |
Environmental Loss Contingency Disclosure | A summary of changes in environmental obligations for the years ended December 31 follows:
| 2013 |  | 2012 |  | 2011
Balance at beginning of year | $ | 1,222 |  |  | $ | 1,453 |  |  | $ | 1,422 |
Accretion expense a | 79 |  |  | 80 |  |  | 88 |
Additions | 73 |  |  | 70 |  |  | 132 |
Reductions b | (77 | ) |  | (182 | ) |  | (68 | )
Spending | (130 | ) |  | (199 | ) |  | (121 | )
Balance at end of year | 1,167 |  |  | 1,222 |  |  | 1,453 |
Less current portion | (121 | ) |  | (186 | ) |  | (205 | )
Long-term portion | $ | 1,046 |  |  | $ | 1,036 |  |  | $ | 1,248 |
a. | Represented accretion of the fair value of environmental obligations assumed in the 2007 acquisition of FMC, which were determined on a discounted cash flow basis.
b. | Reductions primarily reflected revisions for changes in the anticipated scope and timing of environmental remediation projects and the noncash adjustments of environmental matters.
Asset Retirement Obligation Disclosure | A summary of changes in FCX’s AROs for the years ended December 31 follows:
| 2013 |  | 2012 |  | 2011
Balance at beginning of year | $ | 1,146 |  |  | $ | 921 |  |  | $ | 856 |
Liabilities assumed in the acquisitions of PXP and MMR a | 1,028 |  |  | — |  |  | — |
Liabilities incurred | 45 |  |  | 6 |  |  | 9 |
Settlements and revisions to cash flow estimates, net | 123 |  |  | 211 |  |  | 48 |
Accretion expense | 95 |  |  | 55 |  |  | 58 |
Spending | (107 | ) |  | (47 | ) |  | (49 | )
Other | (2 | ) |  | — |  |  | (1 | )
Balance at end of year | 2,328 |  |  | 1,146 |  |  | 921 |
Less: current portion | (115 | ) |  | (55 | ) |  | (31 | )
Long-term portion | $ | 2,213 |  |  | $ | 1,091 |  |  | $ | 890 |
a. | The fair value of AROs assumed in the acquisitions of PXP and MMR ($741 million and $287 million, respectively) were estimated based on projected cash flows, an estimated long-term annual inflation rate of 2.5 percent, and discount rates based on FCX's estimated credit-adjusted, risk-free interest rates ranging from 1.3 percent to 6.3 percent.
Summary of Income Tax Contingencies [Table Text Block] | PT-FI has received assessments from the Indonesian tax authorities for additional taxes and interest related to various audit exceptions for income taxes and other taxes as follows:
Date of Assessment |  | Tax Year |  | Tax Assessment |  | Interest Assessment |  | Total
October 2010 |  | 2005 |  | $ | 103 |  |  | $ | 49 |  |  | $ | 152 |
November 2011 |  | 2006 |  | 22 |  |  | 10 |  |  | 32 |
March 2012 |  | 2007 |  | 91 |  |  | 44 |  |  | 135 |
First-quarter 2013 |  | 2008 |  | 62 |  |  | 52 |  |  | 114 |
Second-quarter 2013 |  | 2011 |  | 56 |  |  | 13 |  |  | 69 |
Total |  |  |  | $ | 334 |  |  | $ | 168 |  |  | $ | 502 |

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- Definition The entire disclosure for environmental loss contingencies, such as presence of hazardous waste, relevant information from reports issued by regulators, and estimated costs to achieve compliance with regulatory requirements. This element may be used for all of an entity's disclosures about environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13328-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13185-110859 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y + Details
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