v3.3.0.814
DISCONTINUED OPERATIONS (Details) - Aromatics - USD ($)
 3 Months Ended 9 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Sep. 30, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]      
Performance bonus payable   $ 5,000,000  
INEOS Americas LLC.      
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]      
Decommissioning and dismantlement costs   5,000,000  
Discontinued Operations Disposed Of By Sale      
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]      
Cash received from business disposal   52,400,000 $ 52,400,000
Business disposal, selling price   47,400,000 47,400,000
Pre tax gain on business disposal   14,100,000 14,100,000
Advance toward the cost of decommissioning and dismantling business   $ 5,000,000 5,000,000
Discontinued Operations Disposed Of By Sale | INEOS Americas LLC.      
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]      
Decommissioning and dismantlement costs     $ 5,000,000
Discontinued Operations Disposed Of By Sale | Scenario Plan      
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]      
Pre tax gain on business disposal $ 5,500,000    
Performance bonus payable $ 5,500,000