Annual report pursuant to Section 13 and 15(d)

Discontinued Operations Summary of Carrying Amount of Major Classes of Assets and Liabilities Related to Wood Operations (Details)

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Discontinued Operations Summary of Carrying Amount of Major Classes of Assets and Liabilities Related to Wood Operations (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cash $ 0.0 $ (1.1) $ (1.6)
Accounts and notes receivable, net   27.1  
Inventories, net   119.0  
Other assets   4.5  
Current assets of discontinued operations 0.0 149.5  
Intangible assets, net   21.8  
Other noncurrent assets   1.0  
Noncurrent assets of discontinued operations 0.0 130.3  
Accounts payable and accrued expenses   26.1  
Current liabilities of discontinued operations 0.0 26.1  
Postretirement benefit liabilities   2.9  
Pension benefit liabilities   3.4  
Deferred income taxes   13.1  
Other liabilities   2.3  
Noncurrent liabilities of discontinued operations $ 0.0 22.7  
Discontinued Operations, Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Property plant and equipment, net   107.5  
Long-term debt   $ 1.0