SEGMENT INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015 segment	Mar. 31, 2014
Segment information
Number of reportable segments	3us-gaap_NumberOfReportableSegments
Segment information
Total net sales	$ 947.6us-gaap_SalesRevenueNet	$ 993.7us-gaap_SalesRevenueNet
Operating income (loss)	15.6us-gaap_OperatingIncomeLoss	(0.4)us-gaap_OperatingIncomeLoss
Interest expense, net	(18.8)	(18.3)
Debt refinancing costs	(3.2)us-gaap_DebtIssuanceCosts
Foreign exchange gain (loss)	(0.2)	0.4
Consolidated loss before income taxes	(6.6)	(18.3)
Operating segments
Segment information
Total net sales	947.6	993.7
Chlorovinyls
Segment information
Total net sales	648.4	682.2
Operating income (loss)	43.7	23.3
Chlorovinyls \| Operating segments
Segment information
Total net sales	704.5	734.0
Chlorovinyls \| Intersegment eliminations
Segment information
Total net sales	56.1	51.8
Building Products
Segment information
Number of primary product groups	2
Segment information
Total net sales	166.4	154.7
Operating income (loss)	(10.3)	(10.8)
Building Products \| Operating segments
Segment information
Total net sales	166.4	154.7
Aromatics
Segment information
Total net sales	132.8	156.8
Operating income (loss)	0.2	4.5
Aromatics \| Operating segments
Segment information
Total net sales	132.8	156.8
Eliminations, Unallocated and Other
Segment information
Operating income (loss)	(18.0)	(17.4)
Eliminations, Unallocated and Other \| Operating segments
Segment information
Total net sales	(56.1)	(51.8)
Eliminations, Unallocated and Other \| Intersegment eliminations
Segment information
Total net sales	$ (56.1)	$ (51.8)

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Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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-Name Accounting Standards Codification

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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