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Acquisitions and Dispositions - Acquisition of Ceilings Plus (Details) - Ceilings Plus - USD ($)
$ in Millions
7 Months Ended
Nov. 30, 2017
Jun. 30, 2018
Business Acquisition [Line Items]    
Purchase price of acquisition   $ 50
Fair value of tangible assets acquired, less liabilities assumed $ 15  
Fair value of intangible assets acquired 20  
Goodwill, acquired $ 15