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Acquisitions (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Payments to Acquire Interest in Subsidiaries and Affiliates   $ 45.0  
Gain on Acquisition $ 14.0 0.0 $ 0.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 56.0    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets 41.0    
Cash Acquired from Acquisition 40.0    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 6.0    
Acquired Intangible Assets, including Goodwill 25.0    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities (1.0)    
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value 15.0 $ 0.0  
Goodwill, Acquired During Period 14.0    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment $ 3.0    
Entekra, A units [Member]      
Business Acquisition [Line Items]      
Equity Method Investment, Ownership Percentage 82.00%    
Entekra, B units [Member] [Member]      
Business Acquisition [Line Items]      
Equity Method Investment, Ownership Percentage 55.00%    
Siding      
Business Acquisition [Line Items]      
Goodwill, Acquired During Period $ 4.0