RESTRUCTURING AND DIVESTITURE COSTS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost And Reserve [Line Items]
Divestiture costs		$ 0		$ 0
Other long-lived asset impairment charges			$ 700,000	1,000,000
Chlorovinyls
Restructuring Cost And Reserve [Line Items]
Divestiture costs	$ 200,000		400,000
Building Products | 2013 Building Products Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Warranty costs	2,200,000		2,200,000
Severance cost	1,200,000	1,000,000	1,300,000	3,900,000
Other long-lived asset impairment charges		$ 300,000	300,000	$ 1,000,000
Corporate
Restructuring Cost And Reserve [Line Items]
Restructuring and divestiture costs	2,800,000		3,600,000
Severance cost	3,600,000		3,600,000
Corporate | Executives
Restructuring Cost And Reserve [Line Items]
Payment for restructuring costs			$ 500,000
Aromatics
Restructuring Cost And Reserve [Line Items]
Restructuring and divestiture costs	20,000,000
Performance bonus payable	5,000,000
Aromatics | INEOS Americas LLC.
Restructuring Cost And Reserve [Line Items]
Restructuring and divestiture costs	10,000,000
Decommissioning and dismantlement costs	$ 5,000,000