Thanks, Roy. Let's start with the income statement. Sequentially, revenues are down $46 million on lower aluminum and alumina prices. Compared to last year, revenues are up $170 million, primarily on higher alumina prices. In the quarter, the net income attributable to Alcoa Corporation was $43 million or $0.23 per share on 188.2 million shares outstanding. Special items in the quarter totaled $82 million after tax and non-controlling interests. Of the $138 million of restructuring before tax and non-controlling interests, $107 million was to establish an allowance on Brazil state VAT credits. While the Company retains the ability to utilize the credits in the future, only the restart of our Sao Luis smelter provides the opportunity to monetize the credits. Amid unfavorable market conditions and with the current inability to obtain a favorable power contract, we felt it necessary to stop recording additional VAT credit and to establish an allowance on the current balances. We still believe the Sao Luis smelter assets are valuable for the future and continue to maintain the smelter assets. Other restructuring charges of note include $12 million for pension and OPEB actions and $8 million for take-or-pay contracts at idled facilities. Now let's look at the income statement, excluding special items. Our fourth quarter 2018 adjusted net income, excluding special items was $125 million or $0.66 per share. Adjusted EBITDA excluding special items was $749 million, down $46 million sequentially primarily due to lower metal prices. Our fourth quarter EBITDA margin was 22%. A few other items of note on a sequential comparison basis: other expenses increased $25 million due to losses in the Aluminum side of our Saudi joint venture and lower foreign currency benefits. Our operational tax rate in the quarter was 38.8%, 6.8 percentage points lower sequentially. In the third quarter, we had a higher tax rate to catch up our full-year rate as rising alumina prices changed our mix of taxable earnings and non-taxable losses. Our share count decreased 0.5 million shares due to stock repurchases and a decrease in common share equivalents. In the fourth quarter, we repurchased 1.7 million shares for $50 million, an average price of $29.01. Commodity pricing changes had both positive and negative impacts this quarter, and even with improved volume, drove slightly lower sequential result. Negative drivers were lower metal prices, unfavorable contract pricing true-ups in our Alumina segment compared to favorable true-ups last quarter and lower energy prices in Brazil. Major positives came from improved sales volume due to higher production in all three segments. The other major benefit came from lower quarter-end prices driving positive corporate inventory accounting impacts compared to negative impacts last quarter. Raw materials cost increases have moderated and even provided a slight benefit this quarter. Now let's shift our focus to the segments. In the segments, Bauxite adjusted EBITDA improved $4 million on increased production from the Huntly and CBG mines. Alumina adjusted EBITDA improved $23 million. Strong production recovery and higher API prices were offset by the favorable pricing true-ups from last quarter turning negative this quarter. The Aluminum segment was down $126 million, primarily on lower metal prices and lower earnings from our Brazil hydro assets. Higher alumina costs continued to flow through the segment, which offset the volume gains from the business. Outside of the segments for the quarter, non-segment impacts netted to positive $9 million. Corporate inventory accounting was a benefit as alumina and aluminum prices dropped at quarter-end. In the fourth quarter, we ended the year with cash of $1.1 billion, up $91 million sequentially and down $245 million year-over-year. As noted earlier, $50 million of share repurchases took place in the quarter, with a matching amount used to reduce debt and make pension contributions. A quick review of our major cash sources and uses for 2018, our total sources of $2.2 billion were comprised of $1.6 billion in operating cash flow and $600 million of debt issuances and other sources. Uses were in three major categories, pension/OPEB, minority interest distributions and capital expenditures and other. We funded $1.1 billion in the pension and post retirement benefits programs, including $412 million of required funding, $225 million related to annuitizations and discretionary contributions and $500 million building a pre-funding balance with proceeds of May’s $500 million bond offering. Separate from pension, the largest outflows of cash were net distributions to our joint venture minority interest partner of $678 million and roughly $400 million of capital expenditures. Now let's take a look at the balance sheet. This quarter, we continued strengthening the balance sheet. Our net debt to adjusted EBITDA is down to 0.2x. Return on capital for fiscal year 2018 is 11.9%. Our fourth quarter days working capital was 22 days, down four days from the third quarter, and an 11-day increase year-over-year reflecting higher raw material prices, lower buy resale activities and timing of vendor payments. Most importantly, our pension and OPEB net liability ended the year at $2.3 billion, down $1.2 billion year-over-year. Sequentially it was up $200 million after a year-end remeasurement as unfavorable asset returns due to the global market decline in the fourth quarter overshadowed slightly improved discount rates. The year-end remeasurement offset earlier favorable interim remeasurements. We've completed our 2018 capital allocation framework and as previously mentioned, we started a stock repurchase program and repurchased 1.7 million shares. These shares were retired and not held in treasury stock. Our future capital allocation framework follows a theme similar to 2018. We will continue balancing many factors in light of expected market conditions, challenges and opportunities, but foremost, we’ll be maintaining liquidity and managing investments to sustain the business and drive value. We will also continue our drive toward attaining in an optimal capital structure, returning cash to stockholders and when appropriate, investing in value creating growth projects. The measure attaining an optimal capital structure, we're using an adjusted net debt metric on a proportional basis. At year end 2018, it was $3.3 billion and our target over the next three to five years is to reduce it to $2.0 billion to $2.5 billion. Important to note that this range can be achieved by making our minimum required pension and OPEB payments, assuming we achieve our expected asset return and no change in discount rates. We have $150 million remaining under our existing $200 million repurchase authorization, as with our adjusted net debt target, we will execute the repurchase program based on cash flows, market conditions, and other relevant factors. Now let's review the full-year outlook for 2019. As Roy mentioned, due to its limited utility to investors and unprecedented market volatility, we're eliminating the quarterly point in time full-year EBITDA outlook. Instead, adding more cash flow information on the outlook page and adding another page of business commentary in the appendix. Starting with the income statement, in the segments compared to 2018, we expect that 2019 bauxite shipments will be flat to up 1 million tons and alumina shipments will be flat up 100,000 tons. Alumina production gains will translate into fewer purchase tons in 2019. Aluminum shipments will decline 500,000 to 600,000 tons year-over-year, partially a result of the expiration of the Tennessee tolling agreement. Outside the segments, we expect transformation to be in the range of $10 million to $20 million primarily due to lower power revenues at Suriname. In 2019, we will stop using LIFO inventory accounting, and metal lag will be included in the Aluminum segment, leaving intercompany profit eliminations as the sole corporate inventory impact. We plan to restate 2018 financial results in the first quarter, but the impact will be insignificant for the year. Moving forward, intercompany profit eliminations will vary based on ending period prices and inventory levels, and we're including a sensitivity in the appendix. Other corporate expense will increase approximately $20 million due to higher resource unit and labor costs. Below the EBITDA line, there are anticipated improvements in depreciation, depletion and amortization, down $33 million to $700 million and net pension and OPEB expense is improving roughly 20% down $24 million to $115 million. Interest expense is essentially flat year-over-year. We expect our 2019 operational tax rate to range from 45% to 55%, our result of losses in non-tax paying jurisdiction and that's dependent upon market conditions. Based on today’s spot prices, we would be toward the top end of that range. In our expanded cash flow section, we have some key expectations. Minimum required pension/OPEB funding is down 27% from $412 million to $300 million. Additional liability optimization via debt reduction or pension funding as well as stock repurchases will be based on market conditions and cash availability. Sustaining and return seeking capital expenditures are set the same as last year's targets at $300 million and $150 million respectively, because we saw higher earnings in 2018 in tax jurisdictions paid on a lag basis, we expect previous period tax payments to increase by approximately $200 million to approximately $360 million in 2019. We have completed our payment schedule for the DOJ, SEC settlement. Environmental and ARO spending is expected to be back to its previously targeted range, $110 million to $120 million. In cash impacts of restructuring charges, for example, Wenatchee power payment, we're $103 million in 2018. As Roy noted earlier, we have reached tentative agreement with the Works Councils at our Avilés and La Coruña smelters. Upon ratification by the workforce, we would expect 2019 restructuring cash impacts to range from $90 million to $115 million. In addition, depending on the ultimate outcome of the process, the Company could incur further charges ranging from $125 million to $135 million, of which 75% would be non-cash. The remaining 25% would result in cash outlays after 2019. In the appendix, you'll continue to find the cost and EBITDA sensitivities as well as a discussion of key business considerations. Those considerations include, for example, the expected sequential impacts of favorable alumina contractual pricing of approximately $30 million and lower alumina cost in the smelters of $40 million to $45 million as well as anticipated unfavorable impacts of increased maintenance activities in the Aluminum segment of approximately $30 million and roughly $15 million lower earnings in the rolling business. So with that, I'll turn it back to you, Roy.