On a worldwide basis, 3M's pension and postretirement plans were 87 percent funded at year-end 2019. The primary U.S. qualified pension plan, which is approximately 67 percent of the worldwide pension obligation, was 93 percent funded and the international pension plans were 87 percent funded. The U.S. non-qualified pension plan is not funded due to tax considerations and other factors. Asset returns in 2019 for the primary U.S. qualified pension plan were 16.3%, as 3M strategically invests in both growth assets and fixed income matching assets to manage its funded status. For the primary U.S. qualified pension plan, the expected long-term rate of return on an annualized basis for 2020 is 6.75%. The primary U.S. qualified pension plan year-end 2019 discount rate was 3.25%, down 1.11 percentage points from the year-end 2018 discount rate of 4.36%. The decrease in U.S. discount rates resulted in an increased valuation of the projected benefit obligation (PBO). The primary U.S. qualified pension plan's funded status decreased 3 percentage points in 2019 due to the higher PBO resulting from the significant discount rate decrease and partially offset by higher return on assets. Additional detail and discussion of international plan asset returns and discount rates is provided in Note 13 (Pension and Postretirement Benefit Plans). 3M expects to contribute approximately $100 million to $200 million of cash to its global defined benefit pension and postretirement plans in 2020. The Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2020.3M expects global defined benefit pension and postretirement expense in 2020 (before settlements, curtailments, special termination benefits and other) to increase by approximately $34 million pre-tax when compared to 2019. Refer to "Critical Accounting Estimates within MD&A and Note 13 (Pension and Postretirement Benefit Plans) for additional information concerning 3M's pension and post-retirement plans. As discussed in Note 3, in December 2019, 3M agreed to sell substantially all of its drug delivery business for approximately $650 million in consideration, subject to closing and other adjustments. 3M expects a pre-tax gain of approximately $400 million as a result of the divestiture that will be reported within the Company's Health Care business. The sale is expected to close in the first half of 2020. Also as discussed in Note 3, in January 2020, 3M completed the sale of its advanced ballistic-protection business for $91 million, subject to closing and other adjustments, plus contingent consideration of up to $25 million depending on the outcome of pending tenders. The Company previously reflected an immaterial impact in 2019 as a result of measuring the disposal group at the lower of its carrying amount or fair value less cost to sell. RESULTS OF OPERATIONS Net Sales: Refer to the preceding "Overview" section and the "Performance by Business Segment" section later in MD&A for additional discussion of sales change. In the attached annual report there is a footnote on Pensions and Other Post Retirement Benefits. The assignment is to document what ASC topic reference is applicable to each area of the footnote. You will have to research in the Codification. T