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Discontinued Operations - Additional Information (Detail) - Specialty Papers [Member] $ in Millions | 1 Months Ended
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Oct. 31, 2018 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Selling price of business unit | $ 360
Cash proceeds from divestiture of business | 323
Retiree healthcare liabilities | 38
Pension liabilities assumed | 210
Related assets transferred from existing pension plan | $ 280

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