FCX or its subsidiaries file income tax returns in the U. S.  federal jurisdiction and various state and foreign jurisdictions.
The tax years for FCX’s major tax jurisdictions that remain subject to examination are as follows:
## Table 0 ##
NOTE 12.
CONTINGENCIES Environmental.
FCX subsidiaries are subject to various national, state and local environmental laws and regulations that govern emissions of air pollutants; discharges of water pollutants; generation, handling, storage and disposal of hazardous substances, hazardous wastes and other toxic materials; and remediation, restoration and reclamation of environmental contamination.
FCX subsidiaries that operate in the U. S.  also are subject to potential liabilities arising under CERCLA and similar state laws that impose responsibility on current and previous owners and operators of a facility for the remediation of hazardous substances released from the facility into the environment, including damages to natural resources, in some cases irrespective of when the damage to the environment occurred or who caused it.
Remediation liability also extends to persons who arranged for the disposal of hazardous substances or transported the hazardous substances to a disposal site selected by the transporter.
These liabilities are often shared on a joint and several basis, meaning that each responsible party is fully responsible for the remediation, if some or all of the other historical owners or operators no longer exist, do not have the financial ability to respond or cannot be found.
As a result, because of FCX’s acquisition of FMC in 2007, many of the subsidiary companies FCX now owns are responsible for a wide variety of environmental remediation projects throughout the U. S. , and FCX expects to spend substantial sums annually for many years to address those remediation issues.
Certain FCX subsidiaries have been advised by the U. S.  Environmental Protection Agency (EPA), the Department of the Interior, the Department of Agriculture and various state agencies that, under CERCLA or similar state laws and regulations, they may be liable for costs of responding to environmental conditions at a number of sites that have been or are being investigated to determine whether releases of hazardous substances have occurred and, if so, to develop and implement remedial actions to address environmental concerns.
FCX is also subject to claims where the release of hazardous substances is alleged to have damaged natural resources (NRD) and to litigation by individuals allegedly exposed to hazardous substances.
As of December 31, 2017, FCX had more than 100 active remediation projects, including NRD claims, in 26 U. S.  states.
A summary of changes in estimated environmental obligations for the years ended December 31 follows:
## Table 1 ##
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.
Estimated future environmental cash payments (on an undiscounted and unescalated basis) total $134 million in 2018, $132 million in 2019, $117 million in 2020, $119 million in 2021, $88 million in 2022 and $2.7 billion thereafter.
The amount and timing of these estimated payments will change as a result of changes in regulatory requirements, changes in scope and timing of remediation activities, the settlement of environmental matters and as actual spending occurs.
At December 31, 2017, FCX’s environmental obligations totaled $1.4 billion, including $1.3 billion recorded on a discounted basis for those obligations assumed in the FMC acquisition at fair value.
On an undiscounted and unescalated basis, these obligations totaled $3.3 billion.
FCX estimates it is reasonably possible that these obligations could range between $2.8 billion and $3.7 billion on an undiscounted and unescalated basis.
At December 31, 2017, the most significant environmental obligations were associated with the Pinal Creek site in Arizona; the Newtown Creek site in New York City; historical smelter sites principally located in Arizona, Indiana, Kansas, Missouri, New Jersey, Oklahoma and Pennsylvania; and uranium mining sites in the western U. S.  The recorded environmental obligations for these sites totaled $1.3 billion at December 31, 2017.
FCX may also be subject to litigation brought by private parties, regulators and local governmental authorities related to these historical sites.
A discussion of these sites follows.
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
## Table 2 ##
Year Ended December 31, 2016
## Table 3 ##
a.
Includes impairment charges totaling $1.5 billion at the FM O&G LLC Guarantor and $2.8 billion at the non-guarantor subsidiaries related to FCX’s oil and gas properties pursuant to full cost accounting rules.
In Management’s Discussion and Analysis of Financial Condition and Results of Operations and Quantitative and Qualitative Disclosures About Market Risk (MD&A), “we,” “us” and “our” refer to Freeport-McMoRan Inc.  (FCX) and its consolidated subsidiaries.
The results of operations reported and summarized below are not necessarily indicative of future operating results (refer to “Cautionary Statement” for further discussion).
References to “Notes” are Notes included in our Notes to Consolidated Financial Statements.
Throughout MD&A, all references to earnings or losses per share are on a diluted basis, unless otherwise noted.
Additionally, in accordance with accounting guidelines, TF Holdings Limited (TFHL), through which we held a controlling interest in the Tenke Fungurume (Tenke) mine until it was sold on November 16, 2016, is reported as a discontinued operation for all periods presented.
OVERVIEW We are a leading international mining company with headquarters in Phoenix, Arizona.
We operate large, long-lived, geographically diverse assets with significant proven and probable reserves of copper, gold and molybdenum.
We are the world’s largest publicly traded copper producer.
Our portfolio of assets includes the Grasberg minerals district in Indonesia, one of the world’s largest copper and gold deposits; and significant mining operations in the Americas, including the large-scale Morenci minerals district in North America and the Cerro Verde operation in South America.
We have taken actions to restore our balance sheet strength through a combination of asset sale transactions and capital market transactions.
We completed approximately $6.7 billion in asset sale transactions (mostly in 2016), including the sale of substantially all of our oil and gas properties, our interest in TFHL and the sale of an additional 13 percent undivided interest in the Morenci minerals district (refer to Note 2 for further discussion of dispositions).
During 2016, we also completed a registered at-the-market offering of our common stock, which generated $1.5 billion in gross proceeds through the sale of 116.5 million shares of our common stock, and redeemed $369 million in senior notes for 27.7 million shares of our common stock (refer to Note 10 for further discussion).
Additionally, in 2016, we settled $1.1 billion in aggregate drillship contracts for $755 million, of which $540 million was funded with 48.1 million shares of our common stock (refer to Notes 10 and 13 for further discussion).
These actions, combined with cash flow from operations, resulted in net reductions of debt totaling $2.9 billion during 2017 and $4.3 billion during 2016, and an increase in consolidated cash from $177 million at December 31, 2015, to $4.2 billion at December 31, 2016, and $4.4 billion at December 31, 2017.
We continue to manage costs and capital spending and, subject to commodity prices and operational results, expect to generate significant operating cash flows for further debt reduction during 2018.
Net income (loss) attributable to common stock totaled $1.8 billion in 2017, $(4.2) billion in 2016 and $(12.2) billion in 2015.
Our results in 2017 benefited from higher copper prices and higher gold sales volumes.
Our prior years’ results were unfavorably impacted by charges for the impairment of oil and gas properties totaling $4.3 billion in 2016 and $11.6 billion in 2015.
Refer to “Consolidated Results” for discussion of items impacting our consolidated results for the three years ended December 31, 2017.
At December 31, 2017, we had $4.4 billion in consolidated cash and cash equivalents and $13.1 billion in total debt.
We had no borrowings and $3.5 billion available under our revolving credit facility.
We believe that we have a high-quality portfolio of longlived copper assets positioned to generate long-term value.
We have commenced a project to develop the Lone Star oxide ores near the Safford operation in eastern Arizona.
We are also pursuing other opportunities to enhance net present values, and we continue to advance studies for future development of our copper resources, the timing of which will be dependent on market conditions.
We have significant mineral reserves, resources and future development opportunities within our portfolio of mining assets.
At December 31, 2017, our estimated consolidated recoverable proven and probable mineral reserves totaled 86.7 billion pounds of copper, 23.5 million ounces of gold and 2.84 billion pounds of molybdenum, which were determined using $2.00 per pound for copper, $1,000 per ounce for gold and $10 per pound for molybdenum.
Refer to “Critical Accounting Estimates—Mineral Reserves” for further discussion.
During 2017, production from our mines totaled 3.7 billion pounds of copper, 1.6 million ounces of gold and 92 million pounds of molybdenum.
Following is a summary of the geographic locations of our consolidated copper, gold and molybdenum production in 2017:

<table><tr><td>Jurisdiction</td><td>Years Subject to Examination</td><td>Additional Open Years</td></tr><tr><td>U.S. Federal</td><td>N/A</td><td>2014-2017</td></tr><tr><td>Indonesia</td><td>2008, 2011-2016</td><td>2017</td></tr><tr><td>Peru</td><td>2012</td><td>2013-2017</td></tr><tr><td>Chile</td><td>2015-2016</td><td>2017</td></tr></table>
<table><tr><td></td><td>2017</td><td>2016</td><td>2015</td></tr><tr><td>Balance at beginning of year</td><td>$1,221</td><td>$1,215</td><td>$1,174</td></tr><tr><td>Accretion expense<sup>a</sup></td><td>84</td><td>81</td><td>78</td></tr><tr><td>Additions</td><td>241</td><td>26</td><td>33</td></tr><tr><td>Reductions<sup>b</sup></td><td>-43</td><td>-43</td><td>-3</td></tr><tr><td>Spending</td><td>-64</td><td>-58</td><td>-67</td></tr><tr><td>Balance at end of year</td><td>1,439</td><td>1,221</td><td>1,215</td></tr><tr><td>Less current portion</td><td>-134</td><td>-129</td><td>-100</td></tr><tr><td>Long-term portion</td><td>$1,305</td><td>$1,092</td><td>$1,115</td></tr></table>
<table><tr><td></td><td>FCX Issuer</td><td>FM O&G LLC Guarantor</td><td>Non-guarantor Subsidiaries</td><td>Eliminations</td><td>Consolidated FCX</td></tr><tr><td>Revenues</td><td>$—</td><td>$52</td><td>$16,351</td><td>$—</td><td>$16,403</td></tr><tr><td>Total costs and expenses</td><td>42</td><td>78</td><td>12,640</td><td>10</td><td>12,770</td></tr><tr><td>Operating (loss) income</td><td>-42</td><td>-26</td><td>3,711</td><td>-10</td><td>3,633</td></tr><tr><td>Interest expense, net</td><td>-467</td><td>-227</td><td>-455</td><td>348</td><td>-801</td></tr><tr><td>Net gain (loss) on early extinguishment of debt</td><td>22</td><td>5</td><td>-6</td><td>—</td><td>21</td></tr><tr><td>Other income (expense), net</td><td>339</td><td>—</td><td>58</td><td>-348</td><td>49</td></tr><tr><td>(Loss) income before income taxes and equity in affiliated companies’ net earnings (losses)</td><td>-148</td><td>-248</td><td>3,308</td><td>-10</td><td>2,902</td></tr><tr><td>Benefit from (provision for) income taxes</td><td>220</td><td>-108</td><td>-998</td><td>3</td><td>-883</td></tr><tr><td>Equity in affiliated companies’ net earnings (losses)</td><td>1,745</td><td>10</td><td>-337</td><td>-1,408</td><td>10</td></tr><tr><td>Net income (loss) from continuing operations</td><td>1,817</td><td>-346</td><td>1,973</td><td>-1,415</td><td>2,029</td></tr><tr><td>Net income from discontinued operations</td><td>—</td><td>—</td><td>66</td><td>—</td><td>66</td></tr><tr><td>Net income (loss)</td><td>1,817</td><td>-346</td><td>2,039</td><td>-1,415</td><td>2,095</td></tr><tr><td>Net income attributable to noncontrolling interests:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Continuing operations</td><td>—</td><td>—</td><td>-150</td><td>-124</td><td>-274</td></tr><tr><td>Discontinued operations</td><td>—</td><td>—</td><td>-4</td><td>—</td><td>-4</td></tr><tr><td>Net income (loss) attributable to common stockholders</td><td>$1,817</td><td>$-346</td><td>$1,885</td><td>$-1,539</td><td>$1,817</td></tr><tr><td>Other comprehensive income (loss)</td><td>61</td><td>—</td><td>61</td><td>-61</td><td>61</td></tr><tr><td>Total comprehensive income (loss)</td><td>$1,878</td><td>$-346</td><td>$1,946</td><td>$-1,600</td><td>$1,878</td></tr></table>
<table><tr><td></td><td>FCX Issuer</td><td>FM O&G LLC Guarantor</td><td></td><td>Non-guarantor Subsidiaries</td><td></td><td>Eliminations</td><td>Consolidated FCX</td></tr><tr><td>Revenues</td><td>$—</td><td>$379</td><td></td><td>$14,451</td><td></td><td>$—</td><td>$14,830</td></tr><tr><td>Total costs and expenses</td><td>75</td><td>3,074</td><td><sup>a</sup></td><td>14,463</td><td><sup>a</sup></td><td>10</td><td>17,622</td></tr><tr><td>Operating loss</td><td>-75</td><td>-2,695</td><td></td><td>-12</td><td></td><td>-10</td><td>-2,792</td></tr><tr><td>Interest expense, net</td><td>-534</td><td>-56</td><td></td><td>-498</td><td></td><td>333</td><td>-755</td></tr><tr><td>Net gain on early extinguishment and exchanges of debt</td><td>26</td><td>—</td><td></td><td>—</td><td></td><td>—</td><td>26</td></tr><tr><td>Other income (expense), net</td><td>271</td><td>—</td><td></td><td>70</td><td></td><td>-292</td><td>49</td></tr><tr><td>(Loss) income before income taxes and equity in affiliated companies’ net (losses) earnings</td><td>-312</td><td>-2,751</td><td></td><td>-440</td><td></td><td>31</td><td>-3,472</td></tr><tr><td>(Provision for) benefit from income taxes</td><td>-2,233</td><td>1,053</td><td></td><td>821</td><td></td><td>-12</td><td>-371</td></tr><tr><td>Equity in affiliated companies’ net (losses) earnings</td><td>-1,609</td><td>-3,101</td><td></td><td>-4,790</td><td></td><td>9,511</td><td>11</td></tr><tr><td>Net (loss) income from continuing operations</td><td>-4,154</td><td>-4,799</td><td></td><td>-4,409</td><td></td><td>9,530</td><td>-3,832</td></tr><tr><td>Net loss from discontinued operations</td><td>—</td><td>—</td><td></td><td>-154</td><td></td><td>-39</td><td>-193</td></tr><tr><td>Net (loss) income</td><td>-4,154</td><td>-4,799</td><td></td><td>-4,563</td><td></td><td>9,491</td><td>-4,025</td></tr><tr><td>Net income, and gain on redemption and preferred dividends attributable to noncontrolling interests:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Continuing operations</td><td>—</td><td>—</td><td></td><td>—</td><td></td><td>-66</td><td>-66</td></tr><tr><td>Discontinued operations</td><td>—</td><td>—</td><td></td><td>-63</td><td></td><td>—</td><td>-63</td></tr><tr><td>Net (loss) income attributable to common stockholders</td><td>$-4,154</td><td>$-4,799</td><td></td><td>$-4,626</td><td></td><td>$9,425</td><td>$-4,154</td></tr><tr><td>Other comprehensive (loss) income</td><td>-45</td><td>—</td><td></td><td>-45</td><td></td><td>45</td><td>-45</td></tr><tr><td>Total comprehensive (loss) income</td><td>$-4,199</td><td>$-4,799</td><td></td><td>$-4,671</td><td></td><td>$9,470</td><td>$-4,199</td></tr></table>

Question: What will Total comprehensive income (loss) reach in next year if it continues to grow at its current rate?
Answer: 2156