Thanks Dan. Good morning to everyone on the call. This morning, I'll discuss the key contributors to our financial performance for the quarter and full year. Capital deployments and our capital position at year end. And some details on our investment portfolio. Staring off, it's important to quantify the impacts of the volatile macroeconomic environment on our fourth quarter results. The S&P 500 index declined 14% during the quarter, the largest quarterly point to point decline since the third quarter of 2011. On a daily average basis, a better indicator of fee generation, the S&P declined 5% from third quarter 2018. Despite the fourth quarter decline, the S&P 500 daily average was favorable for the full year and increased 12% compared to 2017. This negative equity market performance during the fourth quarter, along with macroeconomic drives in Latin America pressures non-GAAP operating earnings in the fourth quarter by a total $68 million pretax or nearly $50 million after tax. As shown on Slide 5, more than half of the macroeconomic impact is included in this quarter significant variances. The remainder reflects the net impact from lower AUM and account value, resulting in lower revenue and pretax operating earnings in RIS -fee and PGI. Despite the unfavorable macroeconomic conditions in the fourth quarter, an ongoing industry pressure, I am pleased with full year results. Net income attributable to Principal was $237 million for the fourth quarter 2018 and $1.5 billion for the full year. Quarterly net realized capital losses of $80 million were driven by derivative losses and DAC amortization with minimal credit losses. Reported non-GAAP operating earnings were $316 million for fourth quarter, or $1.11 per diluted share. Excluding significant variances, fourth quarter non-GAAP operating earnings were $354 million, or $1.24 per diluted share. Reported full year 2018 non-GAAP operating earnings were a record $1.6 billion, an increase of 8% over 2017. Excluding the impacts of the annual actuarial assumption review, full year earnings increased 6% and earnings per diluted share increased 8% over 2017. This growth reflects strong execution, a diversified business mix, benefit from US tax reform and specific to EPS, an increased level of share repurchases. 2018 non-GAAP operating ROE, excluding AOCI other than foreign currency translation was 13.8% at year-end, excluding the impacts of the annual assumption review. The full-year non-GAAP operating earnings effective tax rate was 18.3%, within our guided range of 18% to 21%. At 16.6%, the fourth quarter effective tax rate was below our guided range due to lower total company pretax operating earnings overall, including the segments with higher tax rates, Principal International and PGI. As communicated on our 2019 outlook call, we expect our 2019 effective tax rate to be between 16% to 20%. Turning to slide 5, we had four significant variances that negatively impact fourth quarter non-GAAP operating earnings by $54 million pretax or $38 million after tax. These were primarily macroeconomic related and impacts on a pretax basis include $15 million of higher DAC amortization and RIS-Fee due to the decline in the equity markets. As a reminder, DAC amortization is impacted by the point-to-point market change not the daily average. We expect DAC amortization to return to our normal range of $20 million to $25 million per quarter in 2019, assuming market returns are in line with our expectations. $17 million of lower than expected encaje performance in Principal International, $8 million impact from lower than expected inflation in Brazil, also in Principal International, a portion of this could reverse in first quarter 2019. And we also had $14 million of additional expenses, primarily severance related, with $9 million in PGI, $3 million in RIS-Fee and $2 million in Principal International. While not considered a significant variance, the bottom of slide 5 shows the net revenue and expense impact, the lower equity markets and resulting AUM and account values had on our quarterly pretax operating earnings in RIS-Fee and Principal Global Investors. In the fourth quarter, mortality was unfavorable in Individual Life, seasonally negative in RIS-Spread, but favorable for Specialty Benefits. On an annual basis, mortality and morbidity were in line with or better than our expectations across all our impacted businesses. Total company compensation and other expenses reflect higher seasonal expenses in the fourth quarter compared to the first three quarters of the year excluding significant variances. The increase that we experienced this quarter was in line with our expectations. Our accelerated digital investments remain on track and in line with the impact communicated at our recent Investor Day and the 2019 outlook call. While we remain committed to managing growth and expenses with revenue, it's critical that we also continue to execute on our digital investments to position us for long-term growth. Moving to business unit results. As shown on slide 7, RIS-Fee's pretax operating earnings were $110 million in the fourth quarter, excluding significant variances. Account values declined 10% from third quarter 2018 due to unfavorable equity markets. This negatively impacted quarterly pretax operating earnings by $13 million. Excluding the impacts of the annual assumption review, full year 2018 net revenue growth was flat and below our guided range of 2% to 5%. Pretax return on net revenue of 31% was within our guided range of 30% to 34%. In 2018, RIS-Fee continued to demonstrate strong underlying growth. Compared to full-year 2017, recurring deposits increased 9%, 401(k) participants with account value increased 7%, and we added nearly 1,300 net new plans. Turning to slide 8. RIS-Spread's fourth quarter pretax operating earnings were $79 million, an increase of 6%. Growth in the business was partially offset by higher non-deferrable sales-related expenses in the current quarter. Excluding the impacts of the annual assumption review, full-year net revenue growth of 2% was below our guided range of 5% to 10%, due to the timing of sales throughout the year and pricing discipline in our opportunistic investment-only business. Pretax return on net revenue of 64% was at the high end of the guided range. In 2018, account values grew 12% on strong sales of $7.4 billion. This includes $3.8 billion of fixed annuity sales, a 62% increase over 2017 and $2.7 billion of pension risk transfer sales. Moving to slide 9. Excluding significant variances, PGI pretax operating earnings were $110 million in fourth quarter. AUM declined 6% from third quarter 2018, primarily due to market performance. This resulted in a net negative $15 million impact to pretax operating earnings, as lower fees were partially offset by lower variable compensation expenses. Excluding the impact from the accelerated performance fee in third quarter, operating revenue less pass-through commissions, increased 3%, slightly below our 2018 guided range. And PGI's margin ended the year at 35%, within our guided range. Turning to slide 10. Excluding significant variances, Principal International's fourth quarter pretax operating earnings were $80 million. As a reminder, beginning in fourth quarter, Brazil's DAC amortization expense is $5 million higher than prior quarters as a result of the 2018 annual assumption review. Compared to the prior year quarter, foreign currency negatively impacted pretax operating earnings by $9 million. We believe that fourth quarter's pretax operating earnings, excluding significant variances, is a good starting point to use to estimate PI's earnings in 2019. Relative to 2017, PI's full-year pretax operating earnings were negatively impacted by $112 million as a result of the annual assumption review, lower than expected encaje performance and inflation, as well as foreign currency headwinds. As a result, PI's full-year net revenue growth and margins were lower than our 2018 guided ranges. As shown on slide 11, Specialty Benefits' pretax operating earnings were $75 million in fourth quarter, an increase of 19%. This strong increase was driven by continued favorable claims experience and growth in the business. 2018 was another very strong year for Specialty Benefits. Excluding the impacts of the annual assumption review, pretax operating earnings were a record $283 million, an increase of 17% over 2017. Full-year premium and fees increased more than 7% within our 2018 guided range on strong retention sales and in-group growth. Excluding the impact of the annual assumption review, pretax return on premium and fees was 13%, an improvement of 100 basis points from last year. In 2018, Specialty Benefits had record sales of $387 million, up 12% over 2017. And we deepened relationships with our group benefits customers. Products per customer increased a strong 5% from 2017. Over the past five years, Specialty Benefits premium and fees have increased nearly 8% on a compounded annual basis. And the pretax margin increased 250 basis points over this time period. These results reflect our strong business fundamentals and our focus on our customers. Moving to slide 12. Individual Life's fourth quarter pretax operating earnings were $33 million, below our expectations, primarily due to unfavorable claims experience, which were volatile throughout the year. In 2018, Individual Life premium and fee growth of 2% was slightly lower than our guided range, primarily due to sales mix. Total Individual Life sales were strong for the year. Business market sales of $146 million increased 30% over 2017, and represented 63% of 2018 total sales. Excluding the impacts of the annual assumption review, Life's 2018 pretax margin was 16%, in the middle of our 2018 guided range. Corporate fourth quarter pretax operating losses of $55 million were in line with our expectations. For the full year, corporate losses were slightly below 2018 guidance, as expenses associated with our digital advice platform were more than offset by positive interest and penalty abatements related to prior year tax settlements. Looking ahead to 2019, I want to remind you that the first quarter is typically our lowest quarter for earnings due to seasonality of dental and vision claims in Specialty Benefits and elevated payroll taxes in PGI. Turning to capital. As shown on slide 13, fourth quarter capital deployment included $210 million of share repurchases $152 million of common stock dividends and $10 million of acquisitions. In 2018, we exceeded our guided range for capital deployment with $1.4 billion of deployments during the year, or 90% of net income. Our long-term objective is to deploy between 65% to 70% of net income per year, with variability in any given year. Full-year 2018 capital deployments included $650 million of share repurchases, a majority of which was opportunistic and reflective of our share price, $599 million of common stock dividends, and $140 million through strategic acquisitions, including expansion in Asia and a digital advice platform. As of the end of 2018, we had $425 million remaining on our current share repurchase authorizations. As always, we will continue to take a balanced and disciplined approach to capital deployment. The full-year common stock dividend was $2.10 per share, a 12% increase over 2017. Last night, we announced a $0.54 dividend payable in first quarter 2019 and in line with our targeted 40% dividend payout ratio. As shown by this quarter's volatility, pretax operating earnings in the fee businesses can fluctuate. We have deliberately balanced our operating leverage with other considerations through a conservative liability profile, a high-quality investment portfolio and strong levels of liquidity and capital. As John noted in his comments, we've added slide 14 to provide some color on our investment portfolio. We have a high-quality and diversified investment portfolio that is well matched with our liabilities. Over the past 10 years, we significantly upgraded the quality of both the fixed maturity and commercial mortgage loan portfolios. In addition, we are comfortable with the components of our alternative investment portfolio. Our capital and liquidity position remains very strong. We ended 2018 with over $1.1 billion of available capital at the holding company, an estimated risk-based capital ratio within our target range of 415% to 425%, post tax reform changes, a very strong result given the negative 45 percentage point impact from the tax reform change through the NAIC formula, and over $400 million of available cash in our subsidiaries. In addition, the $750 million of contingent funding arrangements that we added in 2018, along with a low leverage ratio and no debt maturities until 2022, provides us significant financial flexibility. While fourth quarter results were dampened by unfavorable markets, I'm pleased with our results for the full year, a better indicator of our performance and the fundamentals of the business. 2019 won't be without its challenges, but we are excited about the prospect a New Year brings.