GOODWILL AND OTHER INTANGIBLE ASSETS AND RESTRUCTURING (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013 Trade names	Dec. 31, 2013 Chlorovinyls	Dec. 31, 2012 Chlorovinyls	Dec. 31, 2013 Building Products	Dec. 31, 2012 Building Products	Dec. 31, 2013 Window and Door Profiles	Dec. 31, 2013 Window and Door Profiles Customer relationships	Dec. 31, 2013 Window and Door Profiles Trade names
Goodwill
Discount rate on projected future cash flows used in impairment evaluation of reporting unit (as a percent)								15.00%
Non-cash impairment charge to write down goodwill and other intangible assets								$ 24.9
Goodwill impairment charges								18.2
Non-cash impairment charge to write-down other indefinite-lived intangible assets			3.1						3.6	3.1
Changes made to goodwill by reportable segment
Gross goodwill at the beginning of the period	404.9	401.3		245.4	242.9	159.5	158.4
Addition from mergers and acquisitions	1,573.5	1.1		1,572.7		0.8	1.1
Foreign currency translation adjustment	(9.3)	2.5		(9.3)	2.5
Gross goodwill at the end of the period	1,969.1	404.9		1,808.8	245.4	160.3	159.5
Accumulated impairment losses at the end of the period	(205.9)	(187.7)		(55.5)	(55.5)	(150.4)	(132.2)
Net goodwill at the end of the period	1,763.2	217.2		1,753.3	189.9	9.9	27.3
Restructuring charge						$ 3.2