Subsequent Events - Additional Information (Detail) (Subsequent Event [Member])	1 Months Ended
	Oct. 31, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]
Business realignment description	The Company announced that effective January 1, 2015, it will realign its business divisions, creating two new business groups called Performance Materials and Basic Plastics and Feedstocks.
Business realignment date	Jan. 01, 2015