GOODWILL, RESTRUCTURING AND OTHER INTANGIBLE ASSETS (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	$ 1,202.3		$ 1,202.3		$ 52.6
Accumulated impairment charges:	(3.6)		(3.6)
Accumulated amortization:	(63.3)		(63.3)		(18.3)
Foreign currency translation adjustment:			(1.7)
Net carrying amounts	1,133.7		1,133.7		34.3
Amortization expense for the definite-lived intangible assets	15.2	0.8	45.0	1.7
Total definite-lived intangible asset estimated annual amortization expense for the next five fiscal years
Year one	66.8		66.8
Year two	66.8		66.8
Year three	66.8		66.8
Year four	66.8		66.8
Year five	66.8		66.8
Customer relationships
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	1,164.0		1,164.0		35.2
Accumulated impairment charges:	(3.6)		(3.6)
Accumulated amortization:	(51.9)		(51.9)		(8.7)
Foreign currency translation adjustment:			(1.7)
Net carrying amounts	1,106.8		1,106.8		26.5
Customer relationships | Weighted average
Changes made to finite-lived intangible assets by reportable segment
Weighted average estimated useful life			17 years
Technology
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	32.3		32.3		17.4
Accumulated amortization:	(11.2)		(11.2)		(9.6)
Net carrying amounts	21.1		21.1		7.8
Technology | Weighted average
Changes made to finite-lived intangible assets by reportable segment
Weighted average estimated useful life			16 years
Trade names
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	6.0		6.0
Accumulated amortization:	(0.2)		(0.2)
Net carrying amounts	5.8		5.8
Trade names | 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	1,149.7		1,149.7		0
Accumulated amortization:	(42.5)		(42.5)
Foreign currency translation adjustment:			(1.7)
Net carrying amounts	1,105.5		1,105.5
Chlorovinyls | Customer relationships
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	1,128.8		1,128.8
Accumulated amortization:	(41.8)		(41.8)
Foreign currency translation adjustment:			(1.7)
Net carrying amounts	1,085.3		1,085.3
Chlorovinyls | Technology
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	14.9		14.9
Accumulated amortization:	(0.5)		(0.5)
Net carrying amounts	14.4		14.4
Chlorovinyls | Trade names
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	6.0		6.0
Accumulated amortization:	(0.2)		(0.2)
Net carrying amounts	5.8		5.8
Building Products
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	52.6		52.6		52.6
Accumulated impairment charges:	(3.6)		(3.6)
Accumulated amortization:	(20.8)		(20.8)		(18.3)
Net carrying amounts	28.2		28.2		34.3
Building Products | Customer relationships
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	35.2		35.2		35.2
Accumulated impairment charges:	(3.6)		(3.6)
Accumulated amortization:	(10.1)		(10.1)		(8.7)
Net carrying amounts	21.5		21.5		26.5
Building Products | Technology
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	17.4		17.4		17.4
Accumulated amortization:	(10.7)		(10.7)		(9.6)
Net carrying amounts	6.7		6.7		7.8
Aromatics
Changes made to finite-lived intangible assets by reportable segment
Gross carrying amounts	$ 0		$ 0		$ 0