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Subsequent Event - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Jan. 05, 2018
Dec. 03, 2017
May 31, 2017
Subsequent Event [Line Items]      
Common stock, par value   $ 0.0277 $ 0.0277
Common stock, shares authorized   15,000,000 15,000,000
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Common stock, par value $ 0.0277    
Ownership percentage 15.50%    
Common stock, shares authorized 115,000,000    
Termination fee payable under specified circumstances $ 10    
Termination fee payable upon entering into or closing acquisition transaction 3    
Additional termination fee payable 7    
Reimbursement fees and expenses payable $ 2    
Subsequent Event [Member] | Champion Enterprises Holdings, LLC [Member]      
Subsequent Event [Line Items]      
Ownership percentage 84.50%