v3.3.1.900
Restructuring and Divestiture Costs - Chlorovinyls - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Chlorovinyls [Member]    
Restructuring Cost and Reserve [Line Items]    
Divestiture and long-lived asset impairment charges $ 0.4 $ 12.5