GOODWILL AND OTHER INTANGIBLE ASSETS AND RESTRUCTURING (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	$ 1,255.4	$ 52.6
Accumulated amortization:	(82.7)	(18.3)
Foreign currency translation adjustment:	(4.0)
Net carrying amounts	1,168.7	34.3
Amortization expense for the definite-lived intangible assets	64.3	3.3	3.1
Total definite-lived intangible asset estimated annual amortization expense for the next five fiscal years
Year one	69.7
Year two	69.7
Year three	69.7
Year four	69.7
Year five	69.7
Customer relationships
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	1,174.5	35.2
Accumulated amortization:	(68.7)	(8.7)
Foreign currency translation adjustment:	(4.0)
Net carrying amounts	1,101.8	26.5
Customer relationships | Weighted average
Changes made to finite-lived intangible assets by reportable segment
Weighted average estimated useful life	17 years
Supply contracts
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	42.6
Accumulated amortization:	(2.0)
Net carrying amounts	40.6
Supply contracts | Weighted average
Changes made to finite-lived intangible assets by reportable segment
Weighted average estimated useful life	19 years
Trade names
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	6.0
Accumulated amortization:	(0.3)
Net carrying amounts	5.7
Trade names | Weighted average
Changes made to finite-lived intangible assets by reportable segment
Weighted average estimated useful life	16 years
Technology
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	32.3	17.4
Accumulated amortization:	(11.7)	(9.6)
Net carrying amounts	20.6	7.8
Technology | Weighted average
Changes made to finite-lived intangible assets by reportable segment
Weighted average estimated useful life	16 years
Chlorovinyls
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	1,205.8	0
Accumulated amortization:	(61.1)
Foreign currency translation adjustment:	(4.0)
Net carrying amounts	1,140.7
Chlorovinyls | Customer relationships
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	1,142.3
Accumulated amortization:	(58.2)
Foreign currency translation adjustment:	(4.0)
Net carrying amounts	1,080.1
Chlorovinyls | Supply contracts
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	42.6
Accumulated amortization:	(2.0)
Net carrying amounts	40.6
Chlorovinyls | Trade names
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	6.0
Accumulated amortization:	(0.3)
Net carrying amounts	5.7
Chlorovinyls | Technology
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	14.9
Accumulated amortization:	(0.6)
Net carrying amounts	14.3
Building Products
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	49.6	52.6
Accumulated amortization:	(21.6)	(18.3)
Net carrying amounts	28.0	34.3
Building Products | Customer relationships
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	32.2	35.2
Accumulated amortization:	(10.5)	(8.7)
Net carrying amounts	21.7	26.5
Building Products | Technology
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	17.4	17.4
Accumulated amortization:	(11.1)	(9.6)
Net carrying amounts	6.3	7.8
Aromatics
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	$ 0	$ 0