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CONTINGENCIES (Tables) | 12 Months Ended
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Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Environmental Obligations | A summary of changes in estimated environmental obligations for the years ended December 31 follows:
| 2016 |  | 2015 |  | 2014
Balance at beginning of year | $ | 1,215 |  |  | $ | 1,174 |  |  | $ | 1,167 |
Accretion expensea | 81 |  |  | 78 |  |  | 77 |
Additions | 26 |  |  | 33 |  |  | 16 |
Reductionsb | (43 | ) |  | (3 | ) |  | (6 | )
Spending | (58 | ) |  | (67 | ) |  | (80 | )
Balance at end of year | 1,221 |  |  | 1,215 |  |  | 1,174 |
Less current portion | (129 | ) |  | (100 | ) |  | (105 | )
Long-term portion | $ | 1,092 |  |  | $ | 1,115 |  |  | $ | 1,069 |
a. | Represents 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 reflect revisions for changes in the anticipated scope and timing of projects and other noncash adjustments.
Summary of income tax examinations | The tax years for FCX's major tax jurisdictions that remain subject to examination are as follows:
Jurisdiction |  | Years Subject to Examination |  | Additional Open Years
U.S. Federal |  | 2013 |  | 2014-2016
Indonesia |  | 2008, 2011, 2012, 2014, 2015 |  | 2013, 2016
Peru |  | 2011 |  | 2012-2016
Chile |  | 2013-2015 |  | 2016
A summary of these assessments follows:
Tax Year |  | Tax Assessment |  | Penalty and Interest Assessment |  | Total |
2002 to 2005 |  | $ | 16 |  |  | $ | 51 |  |  | $ | 67 |  |
2006 |  | 7 |  |  | 49 |  |  | 56 |  |
2007 |  | 12 |  |  | 18 |  |  | 30 |  |
2008 |  | 21 |  |  | 13 |  |  | 34 |  |
2009 |  | 56 |  |  | 48 |  |  | 104 |  |
2010 |  | 66 |  |  | 98 |  |  | 164 |  |
2011, 2014 to 2016 |  | 22 |  |  | 3 |  |  | 25 |  |
|  | $ | 200 |  |  | $ | 280 |  |  | $ | 480 |  |
PT-FI has received assessments from the Indonesian tax authorities for additional taxes and interest related to various audit exceptions for income and other taxes. PT-FI has filed objections to the assessments because it believes it has properly determined and paid its taxes. A summary of these assessments follows:
Tax Year |  | Tax Assessment |  | Interest Assessment |  | Total
2005 |  | $ | 103 |  |  | $ | 49 |  |  | $ | 152 |
2006 |  | 22 |  |  | 10 |  |  | 32 |
2007 |  | 91 |  |  | 44 |  |  | 135 |
2008 |  | 62 |  |  | 52 |  |  | 114 |
2011 |  | 78 |  |  | 13 |  |  | 91 |
2012 |  | 123 |  |  | — |  |  | 123 |
2014 |  | 152 |  |  | — |  |  | 152 |
|  | $ | 631 |  |  | $ | 168 |  |  | $ | 799 |
Schedule of Asset Retirement Obligations | A summary of changes in FCX’s AROs for the years ended December 31 follows:
| 2016 |  | 2015 |  | 2014 |
Balance at beginning of year | $ | 2,771 |  |  | $ | 2,744 |  |  | $ | 2,316 |  |
Liabilities incurred | 12 |  |  | 97 |  |  | 429 |  | a
Settlements and revisions to cash flow estimates, net | 529 |  | b | (66 | ) |  | 56 |  |
Accretion expense | 137 |  |  | 131 |  |  | 116 |  |
Dispositions | (626 | ) | c | — |  |  | (61 | ) |
Spending | (188 | ) |  | (132 | ) |  | (101 | ) |
Other | — |  |  | (3 | ) |  | (11 | ) |
Balance at end of year | 2,635 |  |  | 2,771 |  |  | 2,744 |  |
Less current portion | (240 | ) |  | (172 | ) |  | (189 | ) |
Long-term portion | $ | 2,395 |  |  | $ | 2,599 |  |  | $ | 2,555 |  |
a. | Primarily reflects updates to the closure approach to reclaim an overburden stockpile in Indonesia.
b. |

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