HESS CORPORATION AND CONSOLIDATED SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued) As a result of continued substantial operating losses and unsuccessful efforts to improve operating performance by reducing refining capacity, HOVENSA prepared an impairment analysis as of December 31, 2011, which concluded that undiscounted future cash flows would not recover the carrying value of its long-lived assets, and recorded an impairment charge and other charges related to the decision to shut down the refinery.
For 2011, the Corporation recorded a total of $1,073 million of losses from its equity investment in HOVENSA.
These pre-tax losses included $875 million ($525 million after income taxes) due to the impairment recorded by HOVENSA and other charges associated with its decision to shut down the refinery.
The Corporation’s share of the impairment related losses recorded by HOVENSA represented an amount equivalent to the Corporation’s financial support to HOVENSA at December 31, 2011, its planned future funding commitments for costs related to the refinery shutdown, and a charge of $135 million for the write-off of related assets held by the subsidiary which owns the Corporation’s investment in HOVENSA.
A deferred income tax benefit of $350 million, consisting primarily of U. S.  income taxes, was recorded on the Corporation’s share of HOVENSA’s impairment and refinery shutdown related charges.
At December 31, 2011, the Corporation had a liability of $487 million for its planned funding commitments, which was fully funded in 2012.
In December 2010, the Corporation recorded an impairment charge of $300 million before income taxes ($289 million after income taxes) to reduce the carrying value of its equity investment in HOVENSA to its fair value.
The investment had been adversely affected by consecutive annual operating losses and a fourth quarter 2010 debt rating downgrade.
The Corporation performed an impairment analysis and concluded that its investment had experienced an other than temporary decline in value.
The fair value was determined based on an income approach using estimated refined petroleum product selling prices and volumes, related costs of product sold, capital and operating expenditures and a market based discount rate (a Level 3 fair value measurement).
The Corporation’s investment in HOVENSA is accounted for using the equity method.
In accordance with Rule 3-09 of Regulation S-X, the Corporation has filed financial statements for HOVENSA in this report on Form 10-K.  6.
Property, Plant and Equipment Property, plant and equipment at December 31 were as follows:
## Table 0 ##
Assets Held for Sale: In September 2012, the Corporation reached an agreement to sell its assets in Azerbaijan consisting of its interests in the Azeri-Chirag-Guneshli (ACG) fields and the associated Baku-TbilisiCeyhan (BTC) pipeline for approximately $1 billion before normal post-closing adjustments.
This transaction is subject to various government and regulatory approvals.
In October 2012, the Corporation also announced that it had reached an agreement to sell its interests in the Beryl fields in the United Kingdom North Sea.
The sale was completed in January 2013 for cash proceeds of approximately $440 million, see Note 21, Subsequent Events in the notes to the Consolidated Financial Statements.
At December 31, 2012, long-term assets totaling $1,092 million, primarily comprising the net property, plant and equipment balances and allocated goodwill of $100 million have been classified as held for sale and reported in Other current assets.
In addition, related asset retirement obligations and deferred income taxes totaling $539 million were reported in Accrued liabilities.
At December 31, 2011, long-term assets totaling $764 million, including goodwill of $62 million and liabilities totaling $556 million were reported as held for sale.
Properties classified as held for sale are not depreciated but are subject to impairment testing.
The table below summarizes marketing sales volumes:
## Table 1 ##
Includes operated, WilcoHess, dealer and branded retailer stations.
In addition, the Corporation plans to divest its interests in an energy trading partnership, a joint venture (Hess 50%) to build a 655-megawatt natural gas fueled electric generating facility in Newark, New Jersey, and the Bayonne Energy Center, LLC (Hess 50%), a joint venture that operates a 512-megawatt natural gas fueled electric generating station in Bayonne, New Jersey, which provides power to New York City.
In the fourth quarter of 2013, the Corporation sold its energy marketing and terminal network businesses which marketed refined petroleum products, natural gas and electricity on the East Coast of the U. S.  to wholesale distributors, industrial and commercial users, other petroleum companies, governmental agencies and public utilities.
In the first quarter of 2013, the Corporation permanently shut down refining operations at its Port Reading, New Jersey facility, thus completing its exit from all refining operations.
HOVENSA, a 50/50 joint venture between the Corporation’s subsidiary, HOVIC, and a subsidiary of PDVSA, had previously shut down its refinery in St.  Croix, U. S.  Virgin Islands in January 2012 and continued operating solely as an oil storage terminal.
During 2012 and continuing into 2013, HOVENSA and the Government of the Virgin Islands negotiated a plan to pursue the sale of HOVENSA and the sales process commenced in the fourth quarter.
If an agreement to sell the refinery cannot be reached, HOVENSA will likely not be able to continue operating as an oil storage terminal.
For further discussion of the refinery shutdown, see Note 10, HOVENSA L. L. C.  Joint Venture, in the notes to the Consolidated Financial Statements.
Competition and Market Conditions See Item 1A.
Risk Factors Related to Our Business and Operations, for a discussion of competition and market conditions.
Other Items Emergency Preparedness and Response Plans and Procedures The Corporation has in place a series of business and asset-specific emergency preparedness, response and business continuity plans that detail procedures for rapid and effective emergency response and environmental mitigation activities.
These plans are risk appropriate and are maintained, reviewed and updated as necessary to ensure their accuracy and suitability.
Where appropriate, they are also reviewed and approved by the relevant host government authorities.
Responder training and drills are routinely held worldwide to assess and continually improve the effectiveness of the Corporation’s plans.
The Corporation’s contractors, service providers, representatives from government agencies and, where applicable, joint venture partners participate in the drills to ensure that emergency procedures are comprehensive and can be effectively implemented.
To complement internal capabilities and to ensure coverage for its global operations, the Corporation maintains membership contracts with a network of local, regional and global oil spill response and emergency response organizations.
At the regional and global level, these organizations include Clean Gulf Associates (CGA), Marine Well Containment Company (MWCC), Wild Well Control (WWC), Subsea Well Intervention Service (SWIS), National Response Corporation (NRC) and Oil Spill Response (OSR).
CGA is a regional spill response organization and MWCC provides the equipment and personnel to contain underwater well control incidents in the Gulf of Mexico.
WWC provides firefighting, well control and engineering services globally.
NRC and OSR are global response organizations and are available to assist the Corporation when needed anywhere in the world.
In addition to owning response assets in their own right, these organizations maintain business relationships that provide immediate access to additional critical response support services if required.
These owned response assets included nearly 300 recovery and storage vessels and barges, more than 250 skimmers, over 300,000 feet of boom, and significant quantities of dispersants and other ancillary equipment, including aircraft.
In addition to external well control and oil spill response support, Hess has contracts with wildlife, environmental, meteorology, incident management, medical and security resources.
If the Corporation were to engage these organizations to obtain
HESS CORPORATION AND CONSOLIDATED SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)
## Table 2 ##
(a) During the first quarter of 2013, the Corporation’s pension and other postretirement plans were impacted by a significant reduction in the expected future service from active participants due to the Corporation’s announced asset sales program.
(b) Plan settlements amounts reported include a charge of $9 million ($5 million after income taxes) due to employee retirements in 2012.
Amounts recognized in the Consolidated Balance Sheet at December 31 consisted of the following:
## Table 3 ##
* The after-tax deficit reflected in Accumulated other comprehensive income (loss) for these retirement plans was $342 million at December 31, 2013 and $639 million at December 31, 2012.
The accumulated benefit obligation for the funded defined benefit pension plans decreased to $1,873 million at December 31, 2013 from $1,937 million at December 31, 2012.
The accumulated benefit obligation for the unfunded defined benefit pension plan was $222 million at December 31, 2013 and $216 million at December 31, 2012.
Components of net periodic benefit cost for funded and unfunded pension plans and the postretirement medical plan consisted of the following:
## Table 4 ##
The Corporation’s 2014 pension and postretirement medical expense is estimated to be approximately $20 million, which includes approximately $28 million related to the amortization of unrecognized net actuarial losses, offset by improved returns on plan assets.
holders of Grupo Gondi manage the joint venture and we provide technical and commercial resources.
We believe the joint venture is helping us to grow our presence in the attractive Mexican market.
We have included the financial results of the joint venture in our Corrugated Packaging segment since the date of formation.
We are accounting for the investment on the equity method.
On January 19, 2016, we completed the Packaging Acquisition.
The entities acquired provide value-added folding carton and litho-laminated display packaging solutions.
We believe the transaction has provided us with attractive and complementary customers, markets and facilities.
We have included the financial results of the acquired entities in our Consumer Packaging segment since the date of the acquisition.
On October 1, 2015, we completed the SP Fiber Acquisition.
The transaction included the acquisition of mills located in Dublin, GA and Newberg, OR, which produce lightweight recycled containerboard and kraft and bag paper.
The Newberg mill also produced newsprint.
As part of the transaction, we also acquired SP Fiber's 48% interest in Green Power Solutions of Georgia, LLC (?GPS?
), which we consolidate.
GPS is a joint venture providing steam to the Dublin mill and electricity to Georgia Power.
Subsequent to the transaction, we announced the permanent closure of the Newberg mill due to the decline in market conditions of the newsprint business and our need to balance supply and demand in our containerboard system.
We have included the financial results of the acquired entities in our Corrugated Packaging segment since the date of the acquisition.
See ?Note 2.
Mergers, Acquisitions and Investmentt?
of the Notes to Consolidated Financial Statements for additional information.
See also Item 1A.
?Risk Factors ? ?
We May Be Unsuccessful in Making and Integrating Mergers, Acquisitions and Investments and Completing Divestitures?.
Business

<table><tr><td></td><td> 2012</td><td> 2011</td></tr><tr><td></td><td colspan="2"> (In millions)</td></tr><tr><td>Exploration and Production</td><td></td><td></td></tr><tr><td>Unproved properties</td><td>$3,558</td><td>$4,064</td></tr><tr><td>Proved properties</td><td>4,072</td><td>3,975</td></tr><tr><td>Wells, equipment and related facilities</td><td>35,385</td><td>29,239</td></tr><tr><td></td><td>43,015</td><td>37,278</td></tr><tr><td>Marketing, Refining and Corporate</td><td>2,538</td><td>2,432</td></tr><tr><td>Total — at cost</td><td>45,553</td><td>39,710</td></tr><tr><td>Less: Reserves for depreciation, depletion, amortization and lease impairment</td><td>16,746</td><td>14,998</td></tr><tr><td>Property, plant and equipment — net</td><td>$28,807</td><td>$24,712</td></tr></table>
<table><tr><td></td><td> 2013</td><td> 2012</td><td> 2011</td></tr><tr><td>Retail Marketing</td><td></td><td></td><td></td></tr><tr><td>Number of retail stations*</td><td>1,350</td><td>1,361</td><td>1,360</td></tr><tr><td>Convenience store revenue (in millions)</td><td>$1,069</td><td>$1,123</td><td>$1,189</td></tr><tr><td>Average gasoline volume per station (thousands of gallons per month)</td><td>187</td><td>192</td><td>195</td></tr></table>
<table><tr><td></td><td colspan="2">Funded Pension Plans</td><td colspan="2">Unfunded Pension Plan</td><td colspan="2">Postretirement Medical Plan</td></tr><tr><td></td><td>2013</td><td>2012</td><td>2013</td><td>2012</td><td>2013</td><td>2012</td></tr><tr><td></td><td colspan="6">(In millions)</td></tr><tr><td>Change in fair value of plan assets</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Balance at January 1</td><td>$1,763</td><td>$1,493</td><td>$—</td><td>$—</td><td>$—</td><td>$—</td></tr><tr><td>Actual return on plan assets</td><td>292</td><td>155</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Employer contributions</td><td>146</td><td>150</td><td>20</td><td>23</td><td>5</td><td>5</td></tr><tr><td>Benefit payments</td><td>-69</td><td>-54</td><td>-20</td><td>-2</td><td>-5</td><td>-5</td></tr><tr><td>Plan settlements (b)</td><td>—</td><td>—</td><td>—</td><td>-21</td><td>—</td><td>—</td></tr><tr><td>Foreign currency exchange rate changes</td><td>13</td><td>19</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Balance at December 31</td><td>2,145</td><td>1,763</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Funded status (plan assets greater (less) than benefit obligations) at December 31</td><td>188</td><td>-347</td><td>-253</td><td>-234</td><td>-97</td><td>-134</td></tr><tr><td>Unrecognized net actuarial (gains) losses</td><td>405</td><td>850</td><td>108</td><td>97</td><td>-2</td><td>39</td></tr><tr><td>Net amount recognized</td><td>$593</td><td>$503</td><td>$-145</td><td>$-137</td><td>$-99</td><td>$-95</td></tr></table>
<table><tr><td></td><td colspan="2">Funded PensionPlans</td><td colspan="2">Unfunded PensionPlan</td><td colspan="2">Postretirement Medical Plan</td></tr><tr><td></td><td> 2013</td><td>2012</td><td>2013</td><td>2012</td><td>2013</td><td>2012</td></tr><tr><td></td><td colspan="6">(In millions)</td></tr><tr><td>Pension asset / (accrued benefit liability)</td><td>$188</td><td>$-347</td><td>$-253</td><td>$-234</td><td>$-97</td><td>$-134</td></tr><tr><td>Accumulated other comprehensive loss, pre-tax*</td><td>405</td><td>850</td><td>108</td><td>97</td><td>-2</td><td>39</td></tr><tr><td>Net amount recognized</td><td>$593</td><td>$503</td><td>$-145</td><td>$-137</td><td>$-99</td><td>$-95</td></tr></table>
<table><tr><td></td><td colspan="3">Pension Plans</td><td colspan="3"> Postretirement  MedicalPlan</td></tr><tr><td></td><td>2013</td><td>2012</td><td>2011</td><td> 2013</td><td> 2012</td><td> 2011</td></tr><tr><td></td><td colspan="6"> (In millions)</td></tr><tr><td>Service cost</td><td>$73</td><td>$74</td><td>$58</td><td>$4</td><td>$7</td><td>$6</td></tr><tr><td>Interest cost</td><td>89</td><td>88</td><td>89</td><td>3</td><td>5</td><td>5</td></tr><tr><td>Expected return on plan assets</td><td>-141</td><td>-116</td><td>-109</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Amortization of unrecognized net actuarial losses</td><td>61</td><td>83</td><td>47</td><td>1</td><td>2</td><td>2</td></tr><tr><td>Settlement loss</td><td>—</td><td>9</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Curtailment loss</td><td>1</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Special termination benefit recognized</td><td>5</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Net periodic benefit cost</td><td>$88</td><td>$138</td><td>$85</td><td>$8</td><td>$14</td><td>$13</td></tr></table>

Question: Which section is Pension asset / (accrued benefit liability) the lowest?
Answer: Unfunded PensionPlan