20 . Segment Information We report our business in three reportable segments: Packaging, Paper, and Corporate and Other. These segments represent distinct businesses that are managed separately because of differing products and services. Each of these businesses requires distinct operating and marketing strategies. During the second quarter of 2018, the Company discontinued the production of paper grades at the Wallula, Washington mill and converted the No. 3 machine at the mill to produce virgin kraft linerboard. Before May 2018, operating results for the Wallula mill were included in the Paper segment. After May 2018, operating results for the Wallula mill are primarily included in the Packaging segment. Packaging. We manufacture and sell a wide variety of containerboard and corrugated packaging products, including conventional shipping containers used to protect and transport manufactured goods, multi-color boxes and displays with strong visual appeal that help to merchandise the packaged product in retail locations. In addition, we are a large producer of packaging for meat, fresh fruit and vegetables, processed food, beverages, and other industrial and consumer products. Paper. We manufacture and sell a range of communication-based papers. Our papers can be manufactured as either commodity papers or specialty papers with specialized or custom features, such as colors, coatings, high brightness, or recycled content. Corporate and Other. Our Corporate and Other segment includes corporate support staff services and related assets and liabilities, and foreign exchange gains and losses. This segment also includes transportation assets, such as rail cars and trucks, which we use to transport our products from some of our manufacturing sites and assets related to LTP. See Note 19, Transactions with Related Parties, for more information related to LTP. Sales in this segment relate primarily to LTP and our rail and truck business. We provide transportation services not only to our own facilities but also, on a limited basis, to third parties when geographic proximity and logistics are favorable. Rail cars and trucks are generally leased. Each segments' profits and losses are measured on operating profits before interest expense, net and other and income taxes. For many of these allocated expenses, the related assets and liabilities remain in the Corporate and Other segment. Segment sales to external customers by product line were as follows (dollars in millions): Year Ended December 31, 2019 2018 2017 Packaging $ 5,932.2 $ 5,938.5 $ 5,312.3 Paper 964.3 1,002.0 1,051.8 Corporate and Other 67.8 74.1 80.8 $ 6,964.3 $ 7,014.6 $ 6,444.9 Sales to foreign unaffiliated customers during the years ended December 31, 2019, 2018, and 2017 were $394.9 million, $487.8 million, and $390.3 million, respectively. At December 31, 2019 and 2018, we did not have any significant long-lived assets held by foreign operations. An analysis of operations by reportable segment is as follows (dollars in millions): Sales, net Operating Depreciation, Year Ended December 31, 2019 Trade Inter- segment Total Income (Loss) Amortization, and Depletion Capital Expenditures (l) Assets Packaging $ 5,905.1 $ 27.1 $ 5,932.2 $ 963.4 (b) $ 342.8 $ 367.4 $ 5,491.5 Paper 964.3  964.3 175.4 (c) 37.7 23.8 791.4 Corporate and Other 94.9 133.1 228.0 (85.1 ) 7.0 8.3 952.9 Intersegment eliminations  (160.2 ) (160.2 )     $ 6,964.3 $  $ 6,964.3 1,053.7 $ 387.5 $ 399.5 $ 7,235.8 Non-operating pension expense (7.9 ) Interest expense, net (128.8 ) (d) Income before taxes $ 917.0 Sales, net Operating Depreciation, Year Ended December 31, 2018 Trade Inter- segment Total Income (Loss) Amortization, and Depletion Capital Expenditures (l) Assets Packaging $ 5,912.3 $ 26.2 $ 5,938.5 $ 1,045.4 (e) $ 342.0 $ 504.0 $ 5,347.0 Paper 1,002.0  1,002.0 97.7 (f) 62.0 12.6 760.1 Corporate and Other 100.3 129.4 229.7 (75.4 ) (g) 6.9 34.8 462.6 Intersegment eliminations  (155.6 ) (155.6 )     $ 7,014.6 $  $ 7,014.6 1,067.7 $ 410.9 $ 551.4 $ 6,569.7 Non-operating pension expense (2.1 ) Interest expense, net (95.1 ) Income before taxes $ 970.5 Sales, net Operating Depreciation, Year Ended December 31, 2017 Trade Inter- segment Total Income (Loss) (a) Amortization, and Depletion Capital Expenditures (l) Assets Packaging $ 5,288.6 $ 23.7 $ 5,312.3 $ 950.3 (h) $ 317.5 $ 305.1 $ 4,933.6 Paper 1,051.8  1,051.8 54.0 (i) 67.6 22.6 945.2 Corporate and Other 104.5 124.7 229.2 (71.8 ) (j) 6.3 15.3 318.7 Intersegment eliminations  (148.4 ) (148.4 )     $ 6,444.9 $  $ 6,444.9 932.5 $ 391.4 $ 343.0 $ 6,197.5 Non-operating pension expense (1.3 ) Interest expense, net (102.6 ) (k) Income before taxes $ 828.6 (a) Effective January 1, 2018, the Company adopted ASU 2017-07, Compensation: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost and applied this standard retrospectively to 2017. This new standard requires the presentation of non-service cost components of net periodic benefits expense to be shown separately outside the subtotal of operating income in the income statement. The components of our financial statements affected by the change in presentation of operating and non-operating pension expense as originally reported in 2017 and as adjusted for the requirements per the new standard are as follows (dollars in millions): Segment income (loss) Year Ended December 31, 2017 As Reported Non-Operating Pension Adjustment Year Ended December 31, 2017 Adjusted Packaging $ 943.7 $ 6.6 $ 950.3 Paper 61.5 (7.5 ) 54.0 Corporate (74.0 ) 2.2 (71.8 ) Income from operations 931.2 1.3 932.5 Non-operating pension expense  (1.3 ) (1.3 ) Interest expense, net (102.6 )  (102.6 ) Income before taxes $ 828.6 $  $ 828.6 (b) Includes the following: o $3.0 million of charges for the disposal of fixed assets related to the containerboard mill conversion at our DeRidder, Louisiana mill. o $0.8 million of charges related to the second quarter discontinuation of uncoated free sheet and coated one-side white paper grades at the Wallula, Washington mill associated with the conversion of the No. 3 paper machine to produce virgin kraft linerboard. o $0.3 million of charges consisting of closure costs related to corrugated products facilities, partially offset by income from the sale of a building related to a closed corrugated products facility . (c) Includes $0.2 million of charges related to the second quarter discontinuation of uncoated free sheet and coated one-side white paper grades at the Wallula, Washington mill associated with the conversion of the No. 3 paper machine to produce virgin kraft linerboard. (d) Includes $38.7 million of charges related to the Companys November 2019 debt refinancing, which included redemption premiums and the write-offs of remaining balances of treasury locks and unamortized debt issuance costs. (e) Includes the following: o $12.3 million of charges related to the second quarter discontinuation of uncoated free sheet and coated one-side white paper grades at the Wallula, Washington mill associated with the conversion of the No. 3 paper machine to produce virgin kraft linerboard. o $1.6 million of charges consisting of closure costs related to corrugated products facilities. o $0.5 million of costs for the property damage insurance deductible for a weather-related incident at one of the corrugated products facilities. o $0.2 million of charges for acquisition and integration costs related to recent acquisitions. (f) Includes $17.7 million of charges related to the second quarter discontinuation of uncoated free sheet and coated one-side white paper grades at the Wallula, Washington mill associated with the conversion of the No. 3 paper machine to produce virgin kraft linerboard. (g) Includes $0.2 million of charges consisting of closure costs related to a corporate administration facility. (h) Includes the following: o $7.2 million of income, net, primarily related to the sale of land corresponding to the closure of a corrugated products facility, partially offset by closure costs related to corrugated products facilities, and a lump sum settlement of a multiemployer pension plan withdrawal liability for one of our corrugated products facilities. o $1.7 million of charges for acquisition and integration costs related to recent acquisitions. o $2.0 million gain related to the expiration of a repurchase option corresponding to timberland previously sold. o $1.6 million of income related to a working capital adjustment from the April 2015 sale of our Hexacomb corrugated manufacturing operations in Europe and Mexico. o $5.0 million of costs for the property damage and business interruption insurance deductible corresponding to the February 2017 explosion at our DeRidder, Louisiana mill. (i) Includes $33.4 million of charges related to the second quarter 2018 discontinuation of uncoated free sheet and coated one-side white paper grades at the Wallula, Washington mill associated with the conversion of the No. 3 paper machine to produce virgin kraft linerboard and $0.4 million of charges related to the closure costs of a paper administration facility. (j) Includes $1.0 million of charges related to the closure costs of a corporate administration facility and $0.7 million of income related to a working capital adjustment from the April 2015 sale of our Hexacomb corrugated manufacturing operations in Europe and Mexico. (k) Includes $1.8 million of expense related to the write-off of deferred debt issuance costs in connection with the December 2017 debt refinancing. (l) Includes Additions to property, plant, and equipment and excludes cash used for Acquisitions of businesses, net of cash acquired as reported on our Consolidated Statements of Cash Flows.