Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations - Narrative (Details)

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Discontinued Operations - Narrative (Details) - DLW Subsidiary - Discontinued operations - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2014
Dec. 11, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Unfunded pension liability related to discontinued operation     $ 115.0  
Deferred tax asset and non-cash tax benefit   $ 43.4    
Pre-tax loss on disposal of discontinued business $ 0.1 $ 1.2    
AWI        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net liability related to discontinued operation       $ 12.9
Assets related to discontinued operation       151.9
Liabilities related to discontinued operation       $ 164.8