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Segment Information - Selected Financial Information by Reportable Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | $ 1,750.7 |  | $ 1,809.9 |  | $ 5,244.3 |  | $ 5,268.1 |
Operating Income (Loss) | 262.8 |  | 298.5 |  | 818.6 |  | 781.0 |
Non-operating pension expense | (1.9) |  | (0.5) |  | 6.0 |  | 1.6 |
Interest expense, net | (21.6) |  | (23.9) |  | (68.0) |  | (73.4) |
Income before taxes | 239.3 |  | 274.1 |  | 744.6 |  | 706.0 |
Trade |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 1,750.7 |  | 1,809.9 |  | 5,244.3 |  | 5,268.1 |
Intersegment Eliminations |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | (41.0) |  | (39.1) |  | (119.5) |  | (114.4) |
Segment Reconciling Items |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | (41.0) |  | (39.1) |  | (119.5) |  | (114.4) |
Packaging |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 1,489.9 |  | 1,535.1 |  | 4,472.1 |  | 4,434.2 |
Operating Income (Loss) | 235.1 | [1] | 284.4 | [2],[3],[4],[5],[6] | 748.6 | [7],[8] | 782.3 | [2],[3],[4],[5],[6]
Packaging | Trade |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 1,482.9 |  | 1,528.3 |  | 4,451.5 |  | 4,414.7 |
Packaging | Intersegment Eliminations |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 7.0 |  | 6.8 |  | 20.6 |  | 19.5 |
Packaging | Operating Segments |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 1,489.9 |  | 1,535.1 |  | 4,472.1 |  | 4,434.2 |
Paper |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 242.8 |  | 254.3 |  | 720.3 |  | 774.5 |
Operating Income (Loss) | 48.1 |  | 32.3 | [2],[3],[4],[5],[6] | 132.5 |  | 55.7 | [2],[3],[4],[5],[6]
Paper | Trade |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 242.8 |  | 254.3 |  | 720.3 |  | 774.5 |
Paper | Operating Segments |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 242.8 |  | 254.3 |  | 720.3 |  | 774.5 |
Corporate and Other |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 18.0 |  | 20.5 |  | 51.9 |  | 59.4 |
Operating Income (Loss) | (20.4) |  | (18.2) | [2],[3],[4],[5],[6] | (62.5) |  | (57.0) | [2],[3],[4],[5],[6]
Corporate and Other | Trade |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 25.0 |  | 27.3 |  | 72.5 |  | 78.9 |
Corporate and Other | Intersegment Eliminations |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | 34.0 |  | 32.3 |  | 98.9 |  | 94.9 |
Corporate and Other | Operating Segments |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net sales | $ 59.0 |  | $ 59.6 |  | $ 171.4 |  | $ 173.8 |
[1] | The three and nine months ended September 30, 2019 include $3.0 million of charges for the disposal of fixed assets related to the containerboard mill conversion at our DeRidder, Louisiana mill.
[2] | $0.1 million of charges related to recent acquisitions.
[3] | $1.3 million and $1.8 million, respectively, of charges consisting of closure costs related to corrugated products facilities and a corporate administration facility.
[4] | $4.0 million and $26.4 million, respectively, of charges related to the second quarter 2018 discontinuation of uncoated free sheet and coated one-side grades at the Wallula, Washington mill associated with the conversion of the No. 3 paper machine to a high-performance 100% virgin kraft linerboard machine.
[5] | $0.5 million of costs for the property damage insurance deductible for a weather-related incident at one of the corrugated products facilities.
[6] | The three and nine months ended September 30, 2018 include the following:
[7] | The nine months ended September 30, 2019 include $0.6 million of charges related to the announced second quarter 2018 discontinuation of uncoated free sheet and coated one-side grades at the Wallula, Washington mill associated with the conversion of the No. 3 paper machine to a high-performance 100% virgin kraft linerboard machine.
[8] | The three and nine months ended September 30, 2019 include $3.0 million of charges for the disposal of fixed assets related to the containerboard mill conversion at our DeRidder, Louisiana mill.

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