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Other Income (Expense), Net (Tables) | 6 Months Ended
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Jun. 30, 2018
Other Income And Expenses [Abstract] |
Components of Other Income (Expense), Net | The components of other income (expense), net, were as follows (dollars in millions):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Asset disposals and write-offs |  | $ | (4.1 | ) |  | $ | (2.4 | ) |  | $ | (9.2 | ) |  | $ | (4.7 | )
Wallula mill restructuring (a) |  |  | (7.2 | ) |  |  | — |  |  |  | (7.9 | ) |  |  | — |
Facilities closure, integration-related, and other costs (b) |  |  | — |  |  |  | (0.5 | ) |  |  | (0.1 | ) |  |  | (1.3 | )
DeRidder mill incident (c) |  |  | — |  |  |  | 2.5 |  |  |  | — |  |  |  | (2.5 | )
Hexacomb working capital adjustment (d) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2.3 |
Other |  |  | (2.0 | ) |  |  | (0.2 | ) |  |  | (4.4 | ) |  |  | (1.4 | )
Total |  | $ | (13.3 | ) |  | $ | (0.6 | ) |  | $ | (21.6 | ) |  | $ | (7.6 | )
(a) | Includes charges related to the discontinuation of production of uncoated free sheet and coated one-side grades at the Wallula, Washington mill in the second quarter of 2018 and the conversion of the No. 3 paper machine to a high-performance 100% virgin kraft linerboard machine.
(b) | For 2018, includes charges consisting of closure costs related to corrugated products facilities. For 2017, includes charges consisting of closure costs related to corrugated products facilities, integration costs related to the TimBar Corporation and Columbus Container Inc. acquisitions, and costs related to a lump sum settlement payment of a multiemployer pension plan for one of our corrugated products facilities.
(c) | Includes costs for the property damage and business interruption insurance deductible corresponding to the February 2017 explosion at our DeRidder, Louisiana mill.
(d) | Includes income related to a working capital adjustment from the April 2015 sale of our Hexacomb corrugated manufacturing operations in Europe and Mexico.

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- Definition Tabular disclosure of each detailed component of other operating costs and expenses that are applicable to sales and revenues, but not included in the cost of sales in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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