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Other Income (Expense), Net - Components of Other Income (Expense), Net (Parenthetical) (Details) | 3 Months Ended
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Jun. 30, 2018
Wallula, Washington Mill |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
High-performance of virgin kraft linerboard machine percentage | 100.00%

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